Hajo,

Would you be interested in sharing the signatures you create with the
ClamAV community? If so, please check out the process here:
http://blog.clamav.net/2014/02/introducing-clamav-community-signatures.html

As for signatures for obfuscated PHP, it really does depend on the code you
are looking at, on a case-by-case basis.

- Alain


On Mon, Sep 8, 2014 at 10:04 AM, Hajo Locke <hajo.lo...@gmx.de> wrote:

> Hello,
>
> from <http://www.dict.cc/englisch-deutsch/from.html> time <
> http://www.dict.cc/englisch-deutsch/time.html> to time <
> http://www.dict.cc/englisch-deutsch/time.html> i create some signatures
> from what i found in php-code of my users.
> Now i found some malware that worries me. Its obfuscated php-code to
> execute all which was sent by POST (mostly spammails). If i unencrypt the
> code, so i always find the same malwarecode. But code how it can be found
> in php-page is always variable.
>
> samples can be found here for next 2 weeks: http://pastebin.com/9VAW8FKK
>
> What should i do now? Is there a trick to find a signature which fits for
> all samples or i have to create a different signature for every sample?
> What <http://www.dict.cc/englisch-deutsch/What.html> is <
> http://www.dict.cc/englisch-deutsch/is.html> your <
> http://www.dict.cc/englisch-deutsch/your.html> view <
> http://www.dict.cc/englisch-deutsch/view.html> on <
> http://www.dict.cc/englisch-deutsch/on.html> this <
> http://www.dict.cc/englisch-deutsch/this.html> subject? <
> http://www.dict.cc/englisch-deutsch/subject%3F.html>
>
> Thanks,
> Hajo
>
>
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>
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>
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