Full Disclosure mailing list archives
Re: Re: Filtering sobig with postfix
From: "gregh" <chows () ozemail com au>
Date: Thu, 21 Aug 2003 07:52:09 +1000
----- Original Message ----- From: vogt () hansenet com To: madduck () madduck net ; full-disclosure () lists netsys com Sent: Wednesday, August 20, 2003 11:27 PM Subject: AW: [Full-disclosure] Re: Filtering sobig with postfix
/see attached file for details/ REJECTthis incurs a factor 2-4 performance drop, and it could also elicit false positives. you should definitely do more than just REJECT (i.e. write out a message: s/REJECT/554 Suspected virus/).
Agree, a message would be good.
Just wanted to mention that I have been testing a few Windows based anti spam progs for customers. Spamkiller has the ability to pick things out quite nicely that some others dont appear to do. I have found the Sobig emails all seem to have a header line in it with "Found to be clean" as a way to attempt to fool something or other that there is no virus attached to the email. Filtering on that header seems to keep them all out so far. Noted the FROM header can be anyone, like other viruses have done in the past, from the infected system's email address book or possibly anywhere on the hard disk. Greg. _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
Current thread:
- AW: Re: Filtering sobig with postfix vogt (Aug 20)
- Re: Re: Filtering sobig with postfix martin f krafft (Aug 20)
- Re: Re: Filtering sobig with postfix gregh (Aug 20)
- <Possible follow-ups>
- AW: Re: Filtering sobig with postfix vogt (Aug 20)
- Re: Re: Filtering sobig with postfix martin f krafft (Aug 20)
- Re: Re: Filtering sobig with postfix martin f krafft (Aug 20)
- AW: Re: Filtering sobig with postfix vogt (Aug 21)
- RE: Re: Filtering sobig with postfix Bojan Zdrnja (Aug 21)
- Re: Re: Filtering sobig with postfix Irwan Hadi (Aug 21)
- RE: Re: Filtering sobig with postfix Bojan Zdrnja (Aug 21)
- RE: Re: Filtering sobig with postfix Bojan Zdrnja (Aug 21)
- Re: Re: Filtering sobig with postfix Robert Banniza (Aug 23)
- Re: Re: Filtering sobig with postfix Andrew J Caines (Aug 23)