Increasing spam filtering with spamassassin
Nikolaos Milas
nmilas at noa.gr
Fri Aug 26 18:34:01 CEST 2016
Hello,
I am using:
amavisd-new-2.8.0-1.el6.rf.x86_64
postfix-2.11.0-1.appletech.el6.x86_64
clamd-0.98.4-1.el6.rf.x86_64
spamassassin-3.3.1-3.el6.x86_64
on CentOS 6.8 (current).
I am trying to increase bayesian filtering of spam using spamassassin,
but I don't seem to be having any good results.
My question is why I am having so little success with bayesian
filtering. Am I doing anything wrong?
Actually, in all mails I see: "BAYES_00=-1.9". That indicates something
is not correctly configured?
Please help me to find out any pitfalls and improve spam filtering!
Here is an example of an email that I would expect to be filtered out (I
have used sa-learn for a lot of similar ones - we are getting a lot of
such scandinavian language spam recently):
Return-Path: <mail at mail-mode.com>
Delivered-To: someuser at space.noa.gr
Received: ...
Authentication-Results: vmail.noa.gr; dkim=pass (1024-bit key)
header.d=mail-mode.com header.i=postmaster at mail-mode.com
header.b=IUd2VFtO
Authentication-Results: mailgw1.noa.gr (amavisd-new); dkim=pass
(1024-bit key) header.d=mail-mode.com; domainkeys=fail (1024-bit
key) reason="fail (message has been altered)"
header.from=mail at mail-mode.com header.d=mail-mode.com
X-Virus-Scanned: amavisd-new at noa.gr
X-Spam-Flag: NO
X-Spam-Score: -1.512
X-Spam-Level: X-Spam-Status: No, score=-1.512 tagged_above=-999
required=6.31 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1,
DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001,
MIME_HTML_ONLY=0.723, RP_MATCHES_RCVD=-0.236] autolearn=no
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; s=mail;
d=mail-mode.com;
DomainKey-Signature: a=rsa-sha1; c=nofws; q=dns; s=mail;
d=mail-mode.com;
To: someuser at space.noa.gr
Subject: Anne er nå online
Message-ID: <5910451bc641971555841031395bc842 at mail-mode.com>
Date: Thu, 25 Aug 2016 12:22:25 +0000
From: "insta-love" <mail at mail-mode.com>
Reply-To: mail at mail-mode.com
MIME-Version: 1.0
X-Mailer-LID: 9,1,2
List-Unsubscribe:
<http://mail-mode.com/unsubscribe.php?M=26821&C=e4d9b2f480f3e4a0ad7a4ab9faca2458&L=2&N=17>
X-Mailer-RecptId: 26821
X-Mailer-SID: 17
X-Mailer-Sent-By: 1
Content-Transfer-Encoding: 8bit
Thread-Topic: Anne er nå online
Content-Type: multipart/alternative;
boundary="----_=_NextPart_001_00f39c84.57c0610a"
I am regularly running sa-learn for spam mails.
Here is the associated /etc/mail/spamassassin/local.cf:
required_hits 5
report_safe 0
rewrite_header Subject [SPAM]
add_header all Report _REPORT_
bayes_expiry_max_db_size 300000
score LOTS_OF_MONEY 0.9
score FREEMAIL_FORGED_FROMDOMAIN 0.5
score WEIRD_PORT 1.5
score TO_IN_SUBJ 1.0
score RCVD_IN_MSPIKE_BL 1.0
score RCVD_IN_MSPIKE_L5 2.5
score RCVD_IN_MSPIKE_L4 2.0
score RCVD_IN_MSPIKE_L3 1.5
score RCVD_IN_MSPIKE_L2 1.0
score RCVD_IN_MSPIKE_H5 -1.0
score RCVD_IN_MSPIKE_H4 -0.8
score RCVD_IN_MSPIKE_H3 -0.6
score RCVD_IN_MSPIKE_H2 -0.4
score RCVD_IN_MSPIKE_WL -0.5
score SPF_NONE 0.001
score SPF_HELO_NONE 0.001
score SPF_PASS -0.1
score SPF_HELO_PASS -0.1
score SPF_FAIL 3.0
score SPF_HELO_FAIL 3.0
score SPF_NEUTRAL 0.001
score SPF_HELO_NEUTRAL 0.001
score SPF_SOFTFAIL 1.0
score SPF_HELO_SOFTFAIL 1.0
This is the bayesian filter dir:
# ls -la /var/amavis/var/.spamassassin/
total 73680
drwx------ 2 amavis amavis 4096 Aug 26 19:20 .
drwxr-x--- 3 amavis amavis 4096 Aug 26 05:26 ..
-rw------- 1 amavis amavis 45096 Aug 26 19:22 bayes_journal
-rw------- 1 amavis amavis 83918848 Aug 26 19:20 bayes_seen
-rw------- 1 amavis amavis 10944512 Aug 26 19:20 bayes_toks
Here is my /etc/amavisd.conf:
use strict;
$max_servers = 2; # num of pre-forked children (2..30 is
common), -m
$daemon_user = "amavis"; # (no default; customary: vscan or
amavis), -u
$daemon_group = "amavis"; # (no default; customary: vscan or
amavis), -g
$mydomain = 'noa.gr'; # a convenient default for other settings
$MYHOME = '/var/amavis'; # a convenient default for other settings, -H
$TEMPBASE = "$MYHOME/tmp"; # working directory, needs to exist, -T
$ENV{TMPDIR} = $TEMPBASE; # environment variable TMPDIR, used by
SA, etc.
$QUARANTINEDIR = "/var/blockedmail";
$db_home = "$MYHOME/db"; # dir for bdb nanny/cache/snmp
databases, -D
$helpers_home = "$MYHOME/var"; # working directory for SpamAssassin, -S
$lock_file = "$MYHOME/var/amavisd.lock"; # -L
$pid_file = "$MYHOME/var/amavisd.pid"; # -P
$log_level = 3; # verbosity 0..5, -d
$log_recip_templ = undef; # disable by-recipient level-0 log entries
$do_syslog = 1; # log via syslogd (preferred)
$syslog_facility = 'local6'; # Syslog facility as a string
# e.g.: mail, daemon, user, local0, ... local7
$enable_db = 1; # enable use of BerkeleyDB/libdb (SNMP
and nanny)
# $enable_zmq = 1; # enable use of ZeroMQ (SNMP and nanny)
$nanny_details_level = 2; # nanny verbosity: 1: traditional, 2:
detailed
$enable_dkim_verification = 1; # enable DKIM signatures verification
$enable_dkim_signing = 1; # load DKIM signing code, keys defined
by dkim_key
@local_domains_maps = ( [".$mydomain"] ); # list of all local domains
@mynetworks = qw( 127.0.0.0/8 [::1] [FE80::]/10 [FEC0::]/10
10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 );
$unix_socketname = "$MYHOME/amavisd.sock"; # amavisd-release or
amavis-milter
# option(s) -p overrides $inet_socket_port and
$unix_socketname
$inet_socket_port = [10024,10028]; # listen on multiple TCP ports
$interface_policy{'10028'} = 'BYPASS';
$policy_bank{'BYPASS'} = { # those configured to send mail to port
10028
bypass_virus_checks_maps => [1], # don't virus-check this mail
bypass_spam_checks_maps => [1], # don't spam-check this mail
bypass_banned_checks_maps => [1], # don't banned-check this mail
bypass_header_checks_maps => [1], # don't header-check this mail
};
$policy_bank{'MYNETS'} = { # mail originating from @mynetworks
originating => 1, # is true in MYNETS by default, but let's make
it explicit
os_fingerprint_method => undef, # don't query p0f for internal
clients
};
$interface_policy{'10026'} = 'ORIGINATING';
$policy_bank{'ORIGINATING'} = { # mail supposedly originating from
our users
originating => 1, # declare that mail was submitted by our smtp
client
allow_disclaimers => 1, # enables disclaimer insertion if available
warnbadhsender => 1,
forward_method => 'smtp:[127.0.0.1]:10027',
smtpd_discard_ehlo_keywords => ['8BITMIME'],
bypass_banned_checks_maps => [1], # allow sending any file names
and types
terminate_dsn_on_notify_success => 0, # don't remove
NOTIFY=SUCCESS option
};
$interface_policy{'SOCK'} = 'AM.PDP-SOCK'; # only applies with
$unix_socketname
$policy_bank{'AM.PDP-SOCK'} = {
protocol => 'AM.PDP',
auth_required_release => 0, # do not require secret_id for
amavisd-release
};
$sa_tag_level_deflt = -999; # add spam info headers if at, or
above that level
$sa_tag2_level_deflt = 6.31; # add 'spam detected' headers at that
level
$sa_kill_level_deflt = 8.31; # triggers spam evasive actions (e.g.
blocks mail)
$sa_dsn_cutoff_level = 10; # spam level beyond which a DSN is not sent
$sa_crediblefrom_dsn_cutoff_level = 10; # likewise, but for a likely
valid From
# $sa_quarantine_cutoff_level = 20; # spam level beyond which
quarantine is off
$penpals_bonus_score = 8; # (no effect without a @storage_sql_dsn
database)
# $penpals_threshold_high = $sa_kill_level_deflt; # don't waste
time on hi spam
# $bounce_killer_score = 100; # spam score points to add for
joe-jobbed bounces
# $sa_mail_body_size_limit = 400*1024; # don't waste time on SA if
mail is larger
$sa_local_tests_only = 0; # only tests which do not require
internet access?
$mailfrom_notify_admin = "virusalert\@$mydomain"; #
notifications sender
$mailfrom_notify_recip = "virusalert\@$mydomain"; #
notifications sender
$mailfrom_notify_spamadmin = "spam.police\@$mydomain"; #
notifications sender
$mailfrom_to_quarantine = ''; # null return path; uses original
sender if undef
@addr_extension_virus_maps = ('virus');
@addr_extension_banned_maps = ('banned');
@addr_extension_spam_maps = ('spam');
@addr_extension_bad_header_maps = ('badh');
@bypass_header_checks_maps = (1);
$path = '/usr/local/sbin:/usr/local/bin:/usr/sbin:/sbin:/usr/bin:/bin';
$MAXLEVELS = 14;
$MAXFILES = 1500;
$MIN_EXPANSION_QUOTA = 100*1024; # bytes (default undef, not
enforced)
$MAX_EXPANSION_QUOTA = 300*1024*1024; # bytes (default undef, not
enforced)
$sa_spam_subject_tag = '***Spam*** ';
$defang_virus = 1; # MIME-wrap passed infected mail
$defang_banned = 1; # MIME-wrap passed mail containing banned name
# for defanging bad headers only turn on certain minor contents
categories:
$defang_by_ccat{CC_BADH.",3"} = 1; # NUL or CR character in header
$defang_by_ccat{CC_BADH.",5"} = 1; # header line longer than 998
characters
$defang_by_ccat{CC_BADH.",6"} = 1; # header field syntax error
$myhostname = 'mailgw1.noa.gr'; # must be a fully-qualified domain
name!
$final_virus_destiny = D_DISCARD;
$final_banned_destiny = D_DISCARD;
$final_spam_destiny = D_DISCARD; #!!! D_DISCARD / D_REJECT /
D_PASS
# $final_bad_header_destiny = D_BOUNCE;
$final_bad_header_destiny = D_PASS;
# $bad_header_quarantine_method = undef;
$virus_quarantine_method = "local:virus/%n-%m" ;
$spam_quarantine_method = "local:spam/%n-%m" ;
$banned_files_quarantine_method = "local:banned/%n-%m" ;
# REMAINING IMPORTANT VARIABLES ARE LISTED HERE BECAUSE OF LONGER
ASSIGNMENTS
@keep_decoded_original_maps = (new_RE(
qr'^MAIL$', # retain full original message for virus checking
qr'^MAIL-UNDECIPHERABLE$', # recheck full mail if it contains
undecipherables
qr'^(ASCII(?! cpio)|text|uuencoded|xxencoded|binhex)'i,
# qr'^Zip archive data', # don't trust Archive::Zip
));
$banned_filename_re = new_RE(
### BLOCKED ANYWHERE
# qr'^UNDECIPHERABLE$', # is or contains any undecipherable components
qr'^\.(exe-ms|dll)$', # banned file(1) types,
rudimentary
# qr'^\.(exe|lha|cab|dll)$', # banned file(1) types
### BLOCK THE FOLLOWING, EXCEPT WITHIN UNIX ARCHIVES:
# [ qr'^\.(gz|bz2)$' => 0 ], # allow any in gzip or bzip2
[ qr'^\.(rpm|cpio|tar)$' => 0 ], # allow any in Unix-type
archives
qr'.\.(pif|scr)$'i, # banned extensions -
rudimentary
# qr'^\.zip$', # block zip type
### BLOCK THE FOLLOWING, EXCEPT WITHIN ARCHIVES:
# [ qr'^\.(zip|rar|arc|arj|zoo)$'=> 0 ], # allow any within these
archives
qr'^application/x-msdownload$'i, # block these MIME types
qr'^application/x-msdos-program$'i,
qr'^application/hta$'i,
# qr'^message/partial$'i, # rfc2046 MIME type
# qr'^message/external-body$'i, # rfc2046 MIME type
# qr'^(application/x-msmetafile|image/x-wmf)$'i, # Windows Metafile
MIME type
# qr'^\.wmf$', # Windows Metafile file(1)
type
# block certain double extensions in filenames
qr'^(?!cid:).*\.[^./]*[A-Za-z][^./]*\.\s*(exe|vbs|pif|scr|bat|cmd|com|cpl|dll)[.\s]*$'i,
# qr'\{[0-9a-f]{8}(-[0-9a-f]{4}){3}-[0-9a-f]{12}\}?'i, # Class ID
CLSID, strict
# qr'\{[0-9a-z]{4,}(-[0-9a-z]{4,}){0,7}\}?'i, # Class ID extension
CLSID, loose
qr'.\.(exe|vbs|pif|scr|cpl)$'i, # banned extension -
basic
# qr'.\.(exe|vbs|pif|scr|cpl|bat|cmd|com)$'i, # banned extension -
basic+cmd
#
qr'.\.(ade|adp|app|bas|bat|chm|cmd|com|cpl|crt|emf|exe|fxp|grp|hlp|hta|
# inf|ini|ins|isp|js|jse|lib|lnk|mda|mdb|mde|mdt|mdw|mdz|msc|msi|
# msp|mst|ocx|ops|pcd|pif|prg|reg|scr|sct|shb|shs|sys|vb|vbe|vbs|vxd|
# wmf|wsc|wsf|wsh)$'ix, # banned extensions - long
# qr'.\.(asd|asf|asx|url|vcs|wmd|wmz)$'i, # consider also
# qr'.\.(ani|cur|ico)$'i, # banned cursors and icons
filename
# qr'^\.ani$', # banned animated cursor
file(1) type
# qr'.\.(mim|b64|bhx|hqx|xxe|uu|uue)$'i, # banned extension -
WinZip vulnerab.
);
# See http://support.microsoft.com/default.aspx?scid=kb;EN-US;q262631
# and http://www.cknow.com/vtutor/vtextensions.htm
#
# ENVELOPE SENDER HARD WHITELISTING
read_hash(\%whitelist_sender, '/etc/amavis/whitelist_domains');
# ENVELOPE SENDER HARD BLACKLISTING
read_hash(\%blacklist_sender, '/etc/amavis/blacklist');
#
# SaneSecurity Medium-Risk Rules adjustment (rather than rejection)
@virus_name_to_spam_score_maps =
(new_RE( # the order
matters!
[ qr'^Doppelstern\.Hoax\.' => 5.0 ], #
doppelstern.ndb rules
[ qr'^Doppelstern\.Lott\.' => 5.0 ],
[ qr'^Doppelstern\.Loan\.' => 5.0 ],
[ qr'^Doppelstern\.Scam4\.' => 5.0 ],
[ qr'^Doppelstern\.Phishing\.' => 5.0 ],
[ qr'^Doppelstern\.Junk\.' => 5.0 ],
[ qr'^ScamNailer\.Phish\.' => 5.0 ], #
scamnailer.ndb rules
[ qr'^Sanesecurity\.Jurlbl\.Auto\.' => 5.0 ], # jurlbla.ndb
rules
[ qr'^Sanesecurity\.Jurlbl\.8993\.' => 5.0 ], # jurlbl.ndb
rule 8993
[ qr'^Sanesecurity\.Lott\.' => 5.0 ], # lott.ndb rules
[ qr'^Sanesecurity\.Spam\.ldb\.' => 5.0 ], # spam.ldb rules
[ qr'^Sanesecurity\.Spear\.' => 5.0 ], # spear.ndb rules
[ qr'^Sanesecurity\.SpearL\.' => 5.0 ], # spearl.ndb
rules
[ qr'^winnow\.phish\.' => 5.0 ], #
winnow_phish_complete_url.ndb rules
[ qr'^winnow\.spam\.' => 5.0 ],
[ qr'^winnow\.malware\.' => 5.0 ],
[ qr'^winnow\.malware\.maccodec\.' => 5.0 ], #
winnow.complex.patterns.ldb rules
[ qr'^winnow\.complex\.patterns\.' => 5.0 ],
[ qr'^winnow\.trojan\.ts\.' => 5.0 ] #
winnow_extended_malware_links.ndb
));
# ENVELOPE SENDER SOFT-WHITELISTING / SOFT-BLACKLISTING
@score_sender_maps = ({ # a by-recipient hash lookup table,
# results from all matching recipient
tables are summed
# ## per-recipient personal tables (NOTE: positive: black,
negative: white)
# 'user1 at example.com' => [{'bla-mobile.press at example.com' => 10.0}],
# 'user3 at example.com' => [{'.ebay.com' => -3.0}],
# 'user4 at example.com' => [{'cleargreen at cleargreen.com' => -7.0,
# '.cleargreen.com' => -5.0}],
## site-wide opinions about senders (the '.' matches any recipient)
'.' => [ # the _first_ matching sender determines the score boost
new_RE( # regexp-type lookup table, just happens to be all
soft-blacklist
[qr'^(bulkmail|offers|cheapbenefits|earnmoney|foryou)@'i => 5.0],
[qr'^(greatcasino|investments|lose_weight_today|market\.alert)@'i=>
5.0],
[qr'^(money2you|MyGreenCard|new\.tld\.registry|opt-out|opt-in)@'i=>
5.0],
[qr'^(optin|saveonlsmoking2002k|specialoffer|specialoffers)@'i => 5.0],
[qr'^(stockalert|stopsnoring|wantsome|workathome|yesitsfree)@'i => 5.0],
[qr'^(your_friend|greatoffers)@'i => 5.0],
[qr'^(inkjetplanet|marketopt|MakeMoney)\d*@'i => 5.0],
),
# read_hash("/var/amavis/sender_scores_sitewide"),
{ # a hash-type lookup table (associative array)
'nobody at cert.org' => -3.0,
'cert-advisory at us-cert.gov' => -3.0,
'owner-alert at iss.net' => -3.0,
'slashdot at slashdot.org' => -3.0,
'securityfocus.com' => -3.0,
'ntbugtraq at listserv.ntbugtraq.com' => -3.0,
'security-alerts at linuxsecurity.com' => -3.0,
'mailman-announce-admin at python.org' => -3.0,
'amavis-user-admin at lists.sourceforge.net'=> -3.0,
'amavis-user-bounces at lists.sourceforge.net' => -3.0,
'spamassassin.apache.org' => -3.0,
'notification-return at lists.sophos.com' => -3.0,
'owner-postfix-users at postfix.org' => -3.0,
'owner-postfix-announce at postfix.org' => -3.0,
'owner-sendmail-announce at lists.sendmail.org' => -3.0,
'sendmail-announce-request at lists.sendmail.org' => -3.0,
'donotreply at sendmail.org' => -3.0,
'ca+envelope at sendmail.org' => -3.0,
'noreply at freshmeat.net' => -3.0,
'owner-technews at postel.acm.org' => -3.0,
'ietf-123-owner at loki.ietf.org' => -3.0,
'cvs-commits-list-admin at gnome.org' => -3.0,
'rt-users-admin at lists.fsck.com' => -3.0,
'clp-request at comp.nus.edu.sg' => -3.0,
'surveys-errors at lists.nua.ie' => -3.0,
'emailnews at genomeweb.com' => -5.0,
'yahoo-dev-null at yahoo-inc.com' => -3.0,
'returns.groups.yahoo.com' => -3.0,
'clusternews at linuxnetworx.com' => -3.0,
lc('lvs-users-admin at LinuxVirtualServer.org') => -3.0,
lc('owner-textbreakingnews at CNNIMAIL12.CNN.COM') => -5.0,
# soft-blacklisting (positive score)
'sender at example.net' => 3.0,
'.example.net' => 1.0,
},
], # end of site-wide tables
});
@decoders = (
['mail', \&do_mime_decode],
# [[qw(asc uue hqx ync)], \&do_ascii], # not safe
['F', \&do_uncompress, ['unfreeze', 'freeze -d', 'melt',
'fcat'] ],
['Z', \&do_uncompress, ['uncompress', 'gzip -d', 'zcat'] ],
['gz', \&do_uncompress, 'gzip -d'],
['gz', \&do_gunzip],
['bz2', \&do_uncompress, 'bzip2 -d'],
['xz', \&do_uncompress,
['xzdec', 'xz -dc', 'unxz -c', 'xzcat'] ],
['lzma', \&do_uncompress,
['lzmadec', 'xz -dc --format=lzma',
'lzma -dc', 'unlzma -c', 'lzcat', 'lzmadec'] ],
['lrz', \&do_uncompress,
['lrzip -q -k -d -o -', 'lrzcat -q -k'] ],
['lzo', \&do_uncompress, 'lzop -d'],
['rpm', \&do_uncompress, ['rpm2cpio.pl', 'rpm2cpio'] ],
[['cpio','tar'], \&do_pax_cpio, ['pax', 'gcpio', 'cpio'] ],
# ['/usr/local/heirloom/usr/5bin/pax', 'pax', 'gcpio',
'cpio']
['deb', \&do_ar, 'ar'],
# ['a', \&do_ar, 'ar'], # unpacking .a seems an overkill
['rar', \&do_unrar, ['unrar', 'rar'] ],
['arj', \&do_unarj, ['unarj', 'arj'] ],
['arc', \&do_arc, ['nomarch', 'arc'] ],
['zoo', \&do_zoo, ['zoo', 'unzoo'] ],
['doc', \&do_ole, 'ripole'],
['cab', \&do_cabextract, 'cabextract'],
['tnef', \&do_tnef_ext, 'tnef'],
['tnef', \&do_tnef],
# ['lha', \&do_lha, 'lha'], # not safe, use 7z instead
# ['sit', \&do_unstuff, 'unstuff'], # not safe
[['zip','kmz'], \&do_7zip, ['7za', '7z'] ],
[['zip','kmz'], \&do_unzip],
['7z', \&do_7zip, ['7zr', '7za', '7z'] ],
[[qw(7z zip gz bz2 Z tar)],
\&do_7zip, ['7za', '7z'] ],
[[qw(xz lzma jar cpio arj rar swf lha iso cab deb rpm)],
\&do_7zip, '7z' ],
['exe', \&do_executable, ['unrar','rar'], 'lha', ['unarj','arj'] ],
);
@av_scanners = (
# ### http://www.sophos.com/
# ['Sophos-SSSP',
# \&ask_daemon, ["{}", 'sssp:/var/run/savdi/sssp.sock'],
# # or: ["{}", 'sssp:[127.0.0.1]:4010'],
# qr/^DONE OK\b/m, qr/^VIRUS\b/m, qr/^VIRUS\s*(\S*)/m ],
# ### http://www.clanfield.info/sophie/
(http://www.vanja.com/tools/sophie/)
# ['Sophie',
# \&ask_daemon, ["{}/\n", 'sophie:/var/run/sophie'],
# qr/(?x)^ 0+ ( : | [\000\r\n]* $)/, qr/(?x)^ 1 ( : | [\000\r\n]*
$)/,
# qr/(?x)^ [-+]? \d+ : (.*?) [\000\r\n]* $/m ],
# ### http://www.csupomona.edu/~henson/www/projects/SAVI-Perl/
# ['Sophos SAVI', \&ask_daemon, ['{}','savi-perl:'] ],
# ['Avira SAVAPI',
# \&ask_daemon, ["*", 'savapi:/var/tmp/.savapi3', 'product-id'],
# qr/^(200|210)/m, qr/^(310|420|319)/m,
# qr/^(?:310|420)[,\s]*(?:.* <<< )?(.+?)(?: ; |$)/m ],
# settings for the SAVAPI3.conf: ArchiveScan=1, HeurLevel=2,
MailboxScan=1
# ### http://www.clamav.net/
['ClamAV-clamd',
\&ask_daemon, ["CONTSCAN {}\n", "/var/run/clamav/clamd.sock"],
qr/\bOK$/m, qr/\bFOUND$/m,
qr/^.*?: (?!Infected Archive)(.*) FOUND$/m ],
# NOTE: run clamd under the same user as amavisd - or run it under
its own
# uid such as clamav, add user clamav to the amavis group, and
then add
# AllowSupplementaryGroups to clamd.conf;
# NOTE: match socket name (LocalSocket) in clamav.conf to the socket
name in
# this entry; when running chrooted one may prefer a socket under
$MYHOME.
# ### http://www.clamav.net/ and CPAN (memory-hungry! clamd is
preferred)
# # note that Mail::ClamAV requires perl to be build with threading!
# ['Mail::ClamAV', \&ask_daemon, ['{}','clamav-perl:'],
# [0], [1], qr/^INFECTED: (.+)/m],
# ### http://www.openantivirus.org/
# ['OpenAntiVirus ScannerDaemon (OAV)',
# \&ask_daemon, ["SCAN {}\n", '127.0.0.1:8127'],
# qr/^OK/m, qr/^FOUND: /m, qr/^FOUND: (.+)/m ],
# ### http://www.vanja.com/tools/trophie/
# ['Trophie',
# \&ask_daemon, ["{}/\n", 'trophie:/var/run/trophie'],
# qr/(?x)^ 0+ ( : | [\000\r\n]* $)/m, qr/(?x)^ 1 ( : |
[\000\r\n]* $)/m,
# qr/(?x)^ [-+]? \d+ : (.*?) [\000\r\n]* $/m ],
# ### http://www.grisoft.com/
# ['AVG Anti-Virus',
# \&ask_daemon, ["SCAN {}\n", '127.0.0.1:55555'],
# qr/^200/m, qr/^403/m, qr/^403[- ].*: ([^\r\n]+)/m ],
# ### http://www.f-prot.com/
# ['F-Prot fpscand', # F-PROT Antivirus for BSD/Linux/Solaris,
version 6
# \&ask_daemon,
# ["SCAN FILE {}/*\n", '127.0.0.1:10200'],
# qr/^(0|8|64) /m,
# qr/^([1235679]|1[01345])
|<[^>:]*(?i)(infected|suspicious|unwanted)/m,
# qr/(?i)<[^>:]*(?:infected|suspicious|unwanted)[^>:]*: ([^>]*)>/m ],
# ### http://www.f-prot.com/
# ['F-Prot f-protd', # old version
# \&ask_daemon,
# ["GET {}/*?-dumb%20-archive%20-packed HTTP/1.0\r\n\r\n",
# ['127.0.0.1:10200', '127.0.0.1:10201', '127.0.0.1:10202',
# '127.0.0.1:10203', '127.0.0.1:10204'] ],
# qr/(?i)<summary[^>]*>clean<\/summary>/m,
# qr/(?i)<summary[^>]*>infected<\/summary>/m,
# qr/(?i)<name>(.+)<\/name>/m ],
# ### http://www.sald.com/, http://www.dials.ru/english/,
http://www.drweb.ru/
# ['DrWebD', \&ask_daemon, # DrWebD 4.31 or later
# [pack('N',1). # DRWEBD_SCAN_CMD
# pack('N',0x00280001). # DONT_CHANGEMAIL, IS_MAIL, RETURN_VIRUSES
# pack('N', # path length
# length("$TEMPBASE/amavis-yyyymmddTHHMMSS-xxxxx/parts/pxxx")).
# '{}/*'. # path
# pack('N',0). # content size
# pack('N',0),
# '/var/drweb/run/drwebd.sock',
# # '/var/amavis/var/run/drwebd.sock', # suitable for chroot
# # '/usr/local/drweb/run/drwebd.sock', # FreeBSD drweb ports default
# # '127.0.0.1:3000', # or over an inet socket
# ],
# qr/\A\x00[\x10\x11][\x00\x10]\x00/sm, #
IS_CLEAN,EVAL_KEY; SKIPPED
# qr/\A\x00[\x00\x01][\x00\x10][\x20\x40\x80]/sm,#
KNOWN_V,UNKNOWN_V,V._MODIF
# qr/\A.{12}(?:infected with )?([^\x00]+)\x00/sm,
# ],
# # NOTE: If using amavis-milter, change length to:
# # length("$TEMPBASE/amavis-milter-xxxxxxxxxxxxxx/parts/pxxx").
#
# ### http://www.kaspersky.com/ (kav4mailservers)
# ['KasperskyLab AVP - aveclient',
# ['/usr/local/kav/bin/aveclient','/usr/local/share/kav/bin/aveclient',
# '/opt/kav/5.5/kav4mailservers/bin/aveclient','aveclient'],
# '-p /var/run/aveserver -s {}/*',
# [0,3,6,8], qr/\b(INFECTED|SUSPICION|SUSPICIOUS)\b/m,
# qr/(?:INFECTED|WARNING|SUSPICION|SUSPICIOUS) (.+)/m,
# ],
# NOTE: one may prefer [0],[2,3,4,5], depending on how suspicious,
# currupted or protected archives are to be handled
### http://www.kaspersky.com/
['KasperskyLab AntiViral Toolkit Pro (AVP)', ['avp'],
'-* -P -B -Y -O- {}', [0,3,6,8], [2,4], # any use for -A -K ?
qr/infected: (.+)/m,
sub {chdir('/opt/AVP') or die "Can't chdir to AVP: $!"},
sub {chdir($TEMPBASE) or die "Can't chdir back to $TEMPBASE $!"},
],
### The kavdaemon and AVPDaemonClient have been removed from Kasperky
### products and replaced by aveserver and aveclient
['KasperskyLab AVPDaemonClient',
[ '/opt/AVP/kavdaemon', 'kavdaemon',
'/opt/AVP/AvpDaemonClient', 'AvpDaemonClient',
'/opt/AVP/AvpTeamDream', 'AvpTeamDream',
'/opt/AVP/avpdc', 'avpdc' ],
"-f=$TEMPBASE {}", [0,8], [3,4,5,6], qr/infected: ([^\r\n]+)/m ],
# change the startup-script in /etc/init.d/kavd to:
# DPARMS="-* -Y -dl -f=/var/amavis /var/amavis"
# (or perhaps: DPARMS="-I0 -Y -* /var/amavis" )
# adjusting /var/amavis above to match your $TEMPBASE.
# The '-f=/var/amavis' is needed if not running it as root, so it
# can find, read, and write its pid file, etc., see 'man
kavdaemon'.
# defUnix.prf: there must be an entry "*/var/amavis" (or whatever
# directory $TEMPBASE specifies) in the 'Names=' section.
# cd /opt/AVP/DaemonClients; configure; cd Sample; make
# cp AvpDaemonClient /opt/AVP/
# su - vscan -c "${PREFIX}/kavdaemon ${DPARMS}"
### http://www.centralcommand.com/
['CentralCommand Vexira (new) vascan',
['vascan','/usr/lib/Vexira/vascan'],
"-a s --timeout=60 --temp=$TEMPBASE -y $QUARANTINEDIR ".
"--log=/var/log/vascan.log {}",
[0,3], [1,2,5],
qr/(?x)^\s* (?:virus|iworm|macro|mutant|sequence|trojan)\
found:\ ( [^\]\s']+ )\ \.\.\.\ /m ],
# Adjust the path of the binary and the virus database as needed.
# 'vascan' does not allow to have the temp directory to be the
same as
# the quarantine directory, and the quarantine option can not
be disabled.
# If $QUARANTINEDIR is not used, then another directory must be
specified
# to appease 'vascan'. Move status 3 to the second list if password
# protected files are to be considered infected.
### http://www.avira.com/
### old Avira AntiVir 2.x (ex H+BEDV) or old CentralCommand
Vexira Antivirus
['Avira AntiVir', ['antivir','vexira'],
'--allfiles -noboot -nombr -rs -s -z {}', [0], qr/ALERT:|VIRUS:/m,
qr/(?x)^\s* (?: ALERT: \s* (?: \[ | [^']* ' ) |
(?i) VIRUS:\ .*?\ virus\ '?) ( [^\]\s']+ )/m ],
# NOTE: if you only have a demo version, remove -z and add 214,
as in:
# '--allfiles -noboot -nombr -rs -s {}', [0,214],
qr/ALERT:|VIRUS:/,
### http://www.avira.com/
### Avira for UNIX 3.x
['Avira AntiVir', ['avscan'],
'-s --batch --alert-action=none {}', [0,4], qr/(?:ALERT|FUND):/m,
qr/(?:ALERT|FUND): (?:.* <<< )?(.+?)(?: ; |$)/m ],
### http://www.commandsoftware.com/
['Command AntiVirus for Linux', 'csav',
'-all -archive -packed {}', [50], [51,52,53],
qr/Infection: (.+)/m ],
### http://www.symantec.com/
['Symantec CarrierScan via Symantec CommandLineScanner',
'cscmdline', '-a scan -i 1 -v -s 127.0.0.1:7777 {}',
qr/^Files Infected:\s+0$/m, qr/^Infected\b/m,
qr/^(?:Info|Virus Name):\s+(.+)/m ],
### http://www.symantec.com/
['Symantec AntiVirus Scan Engine',
'savsecls', '-server 127.0.0.1:7777 -mode scanrepair -details
-verbose {}',
[0], qr/^Infected\b/m,
qr/^(?:Info|Virus Name):\s+(.+)/m ],
# NOTE: check options and patterns to see which entry better
applies
# ### http://www.f-secure.com/products/anti-virus/ version 5.52
# ['F-Secure Antivirus for Linux servers',
# ['/opt/f-secure/fsav/bin/fsav', 'fsav'],
# '--virus-action1=report --archive=yes --auto=yes '.
# '--dumb=yes --list=no --mime=yes {}', [0], [3,4,6,8],
# qr/(?:infection|Infected|Suspected|Riskware): (.+)/m ],
# # NOTE: internal archive handling may be switched off by
'--archive=no'
# # to prevent fsav from exiting with status 9 on broken archives
### http://www.f-secure.com/ version 9.14
['F-Secure Linux Security',
['/opt/f-secure/fsav/bin/fsav', 'fsav'],
'--virus-action1=report --archive=yes --auto=yes '.
'--list=no --nomimeerr {}', [0], [3,4,6,8],
qr/(?:infection|Infected|Suspected|Riskware): (.+)/m ],
# NOTE: internal archive handling may be switched off by
'--archive=no'
# to prevent fsav from exiting with status 9 on broken archives
# ### http://www.avast.com/
# ['avast! Antivirus daemon',
# \&ask_daemon, # greets with 220, terminate with QUIT
# ["SCAN {}\015\012QUIT\015\012", '/var/run/avast4/mailscanner.sock'],
# qr/\t\[\+\]/m, qr/\t\[L\]\t/m, qr/\t\[L\]\t([^[ \t\015\012]+)/m ],
# ### http://www.avast.com/
# ['avast! Antivirus - Client/Server Version', 'avastlite',
# '-a /var/run/avast4/mailscanner.sock -n {}', [0], [1],
# qr/\t\[L\]\t([^[ \t\015\012]+)/m ],
['CAI InoculateIT', 'inocucmd', # retired product
'-sec -nex {}', [0], [100],
qr/was infected by virus (.+)/m ],
# see: http://www.flatmtn.com/computer/Linux-Antivirus_CAI.html
### http://www3.ca.com/Solutions/Product.asp?ID=156 (ex InoculateIT)
['CAI eTrust Antivirus', 'etrust-wrapper',
'-arc -nex -spm h {}', [0], [101],
qr/is infected by virus: (.+)/m ],
# NOTE: requires suid wrapper around inocmd32; consider flag:
-mod reviewer
# see http://marc.theaimsgroup.com/?l=amavis-user&m=109229779912783
### http://mks.com.pl/english.html
['MkS_Vir for Linux (beta)', ['mks32','mks'],
'-s {}/*', [0], [1,2],
qr/--[ \t]*(.+)/m ],
### http://mks.com.pl/english.html
['MkS_Vir daemon', 'mksscan',
'-s -q {}', [0], [1..7],
qr/^... (\S+)/m ],
# ### http://www.nod32.com/, version v2.52 (old)
# ['ESET NOD32 for Linux Mail servers',
# ['/opt/eset/nod32/bin/nod32cli', 'nod32cli'],
# '--subdir --files -z --sfx --rtp --adware --unsafe --pattern
--heur '.
# '-w -a --action-on-infected=accept
--action-on-uncleanable=accept '.
# '--action-on-notscanned=accept {}',
# [0,3], [1,2], qr/virus="([^"]+)"/m ],
# ### http://www.eset.com/, version v2.7 (old)
# ['ESET NOD32 Linux Mail Server - command line interface',
# ['/usr/bin/nod32cli', '/opt/eset/nod32/bin/nod32cli', 'nod32cli'],
# '--subdir {}', [0,3], [1,2], qr/virus="([^"]+)"/m ],
# ### http://www.eset.com/, version 2.71.12
# ['ESET Software ESETS Command Line Interface',
# ['/usr/bin/esets_cli', 'esets_cli'],
# '--subdir {}', [0], [1,2,3], qr/virus="([^"]+)"/m ],
### http://www.eset.com/, version 3.0
['ESET Software ESETS Command Line Interface',
['/usr/bin/esets_cli', 'esets_cli'],
'--subdir {}', [0], [1,2,3],
qr/:\s*action="(?!accepted)[^"]*"\n.*:\s*virus="([^"]*)"/m ],
## http://www.nod32.com/, NOD32LFS version 2.5 and above
['ESET NOD32 for Linux File servers',
['/opt/eset/nod32/sbin/nod32','nod32'],
'--files -z --mail --sfx --rtp --adware --unsafe --pattern
--heur '.
'-w -a --action=1 -b {}',
[0], [1,10], qr/^object=.*, virus="(.*?)",/m ],
# Experimental, based on posting from Rado Dibarbora (Dibo) on
2002-05-31
# ['ESET Software NOD32 Client/Server (NOD32SS)',
# \&ask_daemon2, # greets with 200, persistent, terminate with QUIT
# ["SCAN {}/*\r\n", '127.0.0.1:8448' ],
# qr/^200 File OK/m, qr/^201 /m, qr/^201 (.+)/m ],
### http://www.norman.com/products_nvc.shtml
['Norman Virus Control v5 / Linux', 'nvcc',
'-c -l:0 -s -u -temp:$TEMPBASE {}', [0,10,11], [1,2,14],
qr/(?i).* virus in .* -> \'(.+)\'/m ],
### http://www.pandasoftware.com/
['Panda CommandLineSecure 9 for Linux',
['/opt/pavcl/usr/bin/pavcl','pavcl'],
'-auto -aex -heu -cmp -nbr -nor -nos -eng -nob {}',
qr/Number of files infected[ .]*: 0+(?!\d)/m,
qr/Number of files infected[ .]*: 0*[1-9]/m,
qr/Found virus :\s*(\S+)/m ],
# NOTE: for efficiency, start the Panda in resident mode with
'pavcl -tsr'
# before starting amavisd - the bases are then loaded only once
at startup.
# To reload bases in a signature update script:
# /opt/pavcl/usr/bin/pavcl -tsr -ulr; /opt/pavcl/usr/bin/pavcl -tsr
# Please review other options of pavcl, for example:
# -nomalw, -nojoke, -nodial, -nohackt, -nospyw, -nocookies
# ### http://www.pandasoftware.com/
# ['Panda Antivirus for Linux', ['pavcl'],
# '-TSR -aut -aex -heu -cmp -nbr -nor -nso -eng {}',
# [0], [0x10, 0x30, 0x50, 0x70, 0x90, 0xB0, 0xD0, 0xF0],
# qr/Found virus :\s*(\S+)/m ],
# GeCAD AV technology is acquired by Microsoft; RAV has been
discontinued.
# Check your RAV license terms before fiddling with the following
two lines!
# ['GeCAD RAV AntiVirus 8', 'ravav',
# '--all --archive --mail {}', [1], [2,3,4,5], qr/Infected: (.+)/m ],
# # NOTE: the command line switches changed with scan engine 8.5 !
# # (btw, assigning stdin to /dev/null causes RAV to fail)
### http://www.nai.com/
['NAI McAfee AntiVirus (uvscan)', 'uvscan',
'--secure -rv --mime --summary --noboot - {}', [0], [13],
qr/(?x) Found (?:
\ the\ (.+)\ (?:virus|trojan) |
\ (?:virus|trojan)\ or\ variant\ ([^ ]+) |
:\ (.+)\ NOT\ a\ virus)/m,
# sub {$ENV{LD_PRELOAD}='/lib/libc.so.6'},
# sub {delete $ENV{LD_PRELOAD}},
],
# NOTE1: with RH9: force the dynamic linker to look at
/lib/libc.so.6 before
# anything else by setting environment variable
LD_PRELOAD=/lib/libc.so.6
# and then clear it when finished to avoid confusing anything else.
# NOTE2: to treat encrypted files as viruses replace the [13] with:
# qr/^\s{5,}(Found|is password-protected|.*(virus|trojan))/
### http://www.virusbuster.hu/en/
['VirusBuster', ['vbuster', 'vbengcl'],
"{} -ss -i '*' -log=$MYHOME/vbuster.log", [0], [1],
qr/: '(.*)' - Virus/m ],
# VirusBuster Ltd. does not support the daemon version for the
workstation
# engine (vbuster-eng-1.12-linux-i386-libc6.tgz) any longer. The
names of
# binaries, some parameters AND return codes have changed (from 3
to 1).
# See also the new Vexira entry 'vascan' which is possibly related.
# ### http://www.virusbuster.hu/en/
# ['VirusBuster (Client + Daemon)', 'vbengd',
# '-f -log scandir {}', [0], [3],
# qr/Virus found = (.*);/m ],
# # HINT: for an infected file it always returns 3,
# # although the man-page tells a different story
### http://www.cyber.com/
['CyberSoft VFind', 'vfind',
'--vexit {}/*', [0], [23], qr/##==>>>> VIRUS ID: CVDL (.+)/m,
# sub {$ENV{VSTK_HOME}='/usr/lib/vstk'},
],
### http://www.avast.com/
['avast! Antivirus', ['/usr/bin/avastcmd','avastcmd'],
'-a -i -n -t=A {}', [0], [1], qr/\binfected by:\s+([^
\t\n\[\]]+)/m ],
### http://www.ikarus-software.com/
['Ikarus AntiVirus for Linux', 'ikarus',
'{}', [0], [40], qr/Signature (.+) found/m ],
### http://www.bitdefender.com/
['BitDefender', 'bdscan', # new version
'--action=ignore --no-list {}', qr/^Infected
files\s*:\s*0+(?!\d)/m,
qr/^(?:Infected files|Identified viruses|Suspect
files)\s*:\s*0*[1-9]/m,
qr/(?:suspected|infected)\s*:\s*(.*)(?:\033|$)/m ],
### http://www.bitdefender.com/
['BitDefender', 'bdc', # old version
'--arc --mail {}', qr/^Infected files *:0+(?!\d)/m,
qr/^(?:Infected files|Identified viruses|Suspect files)
*:0*[1-9]/m,
qr/(?:suspected|infected): (.*)(?:\033|$)/m ],
# consider also: --all --nowarn --alev=15 --flev=15. The --all
argument may
# not apply to your version of bdc, check documentation and see
'bdc --help'
### ArcaVir for Linux and Unix http://www.arcabit.pl/
['ArcaVir for Linux', ['arcacmd','arcacmd.static'],
'-v 1 -summary 0 -s {}', [0], [1,2],
qr/(?:VIR|WIR):[ \t]*(.+)/m ],
# ### a generic SMTP-client interface to a SMTP-based virus scanner
# ['av_smtp', \&ask_av_smtp,
# ['{}', 'smtp:[127.0.0.1]:5525', 'dummy at localhost'],
# qr/^2/, qr/^5/, qr/^\s*(.*?)\s*$/m ],
# ['File::Scan', sub {Amavis::AV::ask_av(sub{
# use File::Scan; my($fn)=@_;
# my($f)=File::Scan->new(max_txt_size=>0, max_bin_size=>0);
# my($vname) = $f->scan($fn);
# $f->error ? (2,"Error: ".$f->error)
# : ($vname ne '') ? (1,"$vname FOUND") : (0,"Clean")}, @_) },
# ["{}/*"], [0], [1], qr/^(.*) FOUND$/m ],
# ### fully-fledged checker for JPEG marker segments of invalid length
# ['check-jpeg',
# sub { use JpegTester ();
Amavis::AV::ask_av(\&JpegTester::test_jpeg, @_) },
# ["{}/*"], undef, [1], qr/^(bad jpeg: .*)$/m ],
# # NOTE: place file JpegTester.pm somewhere where Perl can find it,
# # for example in /usr/local/lib/perl5/site_perl
);
@av_scanners_backup = (
### http://www.clamav.net/ - backs up clamd or Mail::ClamAV
['ClamAV-clamscan', 'clamscan',
"--stdout --no-summary -r --tempdir=$TEMPBASE {}",
[0], qr/:.*\sFOUND$/m, qr/^.*?: (?!Infected Archive)(.*)
FOUND$/m ],
# ### http://www.clamav.net/ - using remote clamd scanner as a backup
# ['ClamAV-clamdscan', 'clamdscan',
# "--stdout --no-summary --config-file=/etc/clamd-client.conf {}",
# [0], qr/:.*\sFOUND$/m, qr/^.*?: (?!Infected Archive)(.*) FOUND$/m ],
# ['ClamAV-clamd-stream',
# \&ask_daemon, ["*", 'clamd:/var/run/clamav/clamd.sock'],
# qr/\bOK$/m, qr/\bFOUND$/m,
# qr/^.*?: (?!Infected Archive)(.*) FOUND$/m ],
### http://www.f-prot.com/ - backs up F-Prot Daemon, V6
['F-PROT Antivirus for UNIX', ['fpscan'],
'--report --mount --adware {}', # consider: --applications -s
4 -u 3 -z 10
[0,8,64], [1,2,3, 4+1,4+2,4+3, 8+1,8+2,8+3, 12+1,12+2,12+3],
qr/^\[Found\s+[^\]]*\]\s+<([^ \t(>]*)/m ],
### http://www.f-prot.com/ - backs up F-Prot Daemon (old)
['FRISK F-Prot Antivirus', ['f-prot','f-prot.sh'],
'-dumb -archive -packed {}', [0,8], [3,6], # or: [0], [3,6,8],
qr/(?:Infection:|security risk named) (.+)|\s+contains\s+(.+)$/m ],
### http://www.trendmicro.com/ - backs up Trophie
['Trend Micro FileScanner', ['/etc/iscan/vscan','vscan'],
'-za -a {}', [0], qr/Found virus/m, qr/Found virus (.+) in/m ],
### http://www.sald.com/, http://drweb.imshop.de/ - backs up DrWebD
['drweb - DrWeb Antivirus', # security LHA hole in Dr.Web 4.33
and earlier
['/usr/local/drweb/drweb', '/opt/drweb/drweb', 'drweb'],
'-path={} -al -go -ot -cn -upn -ok-',
[0,32], [1,9,33], qr' infected (?:with|by)(?: virus)? (.*)$'m ],
### http://www.kaspersky.com/
['Kaspersky Antivirus v5.5',
['/opt/kaspersky/kav4fs/bin/kav4fs-kavscanner',
'/opt/kav/5.5/kav4unix/bin/kavscanner',
'/opt/kav/5.5/kav4mailservers/bin/kavscanner', 'kavscanner'],
'-i0 -xn -xp -mn -R -ePASBME {}/*', [0,10,15], [5,20,21,25],
qr/(?:INFECTED|WARNING|SUSPICION|SUSPICIOUS) (.*)/m,
# sub {chdir('/opt/kav/bin') or die "Can't chdir to kav: $!"},
# sub {chdir($TEMPBASE) or die "Can't chdir back to $TEMPBASE $!"},
],
# Commented out because the name 'sweep' clashes with Debian and FreeBSD
# package/port of an audio editor. Make sure the correct 'sweep' is
found
# in the path when enabling.
#
# ### http://www.sophos.com/ - backs up Sophie or SAVI-Perl
# ['Sophos Anti Virus (sweep)', 'sweep',
# '-nb -f -all -rec -ss -sc -archive -cab -mime -oe -tnef '.
# '--no-reset-atime {}',
# [0,2], qr/Virus .*? found/m,
# qr/^>>> Virus(?: fragment)? '?(.*?)'? found/m,
# ],
# # other options to consider: -idedir=/usr/local/sav
# Always succeeds and considers mail clean.
# Potentially useful when all other scanners fail and it is desirable
# to let mail continue to flow with no virus checking (when
uncommented).
# ['always-clean', sub {0}],
);
1; # insure a defined return value
Thanks in advance for your kind assistance.
Nick
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