AW: logging attachement hashes

[Ralf Kirmis via amavis-users]

Hello,

has anyone creative ideas on how to evaluate those hash values​​?


Kindly regards,

Ralf Kirmis
 

-----Ursprüngliche Nachricht-----
Von: amavis-users [mailto:amavis-users-bounces+rk=wizard.de at amavis.org] Im Auftrag von Andreas Schulze via amavis-users
Gesendet: Dienstag, 5. November 2013 13:44
An: amavis-users at amavis.org
Betreff: logging attachement hashes

Hello,

I wrote a patch to enable amavisd logging a hash of each mimepart of a message.
As a result we have a nice logging about attachment with randomized names:
Nov  5 13:24:34 amavis amavis[63605]: (63605) p003 1/2 Content-Type: application/zip, size: 175613 B, md5: e687fa20dbe2f62418da7dee62f5ef74, name: VodafoneWillkommen_915348761926.zip
Nov  5 13:24:47 amavis amavis[64401]: (64401) p003 1/2 Content-Type: application/zip, size: 175613 B, md5: e687fa20dbe2f62418da7dee62f5ef74, name: VodafoneWillkommen_246684491810.zip
Nov  5 13:24:49 amavis amavis[37512]: (37512) p003 1/2 Content-Type: application/zip, size: 175613 B, md5: e687fa20dbe2f62418da7dee62f5ef74, name: VodafoneWillkommen_385492343722.zip
Nov  5 13:25:11 amavis amavis[23929]: (23929) p003 1/2 Content-Type: application/zip, size: 175613 B, md5: e687fa20dbe2f62418da7dee62f5ef74, name: VodafoneWillkommen_410730648345.zip
Nov  5 13:25:28 amavis amavis[23927]: (23927) p003 1/2 Content-Type: application/zip, size: 175613 B, md5: e687fa20dbe2f62418da7dee62f5ef74, name: VodafoneWillkommen_067966022207.zip
Nov  5 13:25:35 amavis amavis[23931]: (23931) p003 1/2 Content-Type: application/zip, size: 175613 B, md5: e687fa20dbe2f62418da7dee62f5ef74, name: VodafoneWillkommen_886327295193.zip
Nov  5 13:25:49 amavis amavis[23923]: (23923) p003 1/2 Content-Type: application/zip, size: 175613 B, md5: e687fa20dbe2f62418da7dee62f5ef74, name: VodafoneWillkommen_079214708084.zip
Nov  5 13:25:58 amavis amavis[23936]: (23936) p003 1/2 Content-Type: application/zip, size: 175613 B, md5: e687fa20dbe2f62418da7dee62f5ef74, name: VodafoneWillkommen_381806514856.zip

Looking at these logs it's very easy to identify malicius content still not detected by virusscanners.
Maybe somone has an idea to extend that feature.

Andreas

--
Andreas Schulze
Internetdienste | P252

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