Malware Signatures to ClamAV

Malware Signatures from malware expert help improve the detection rate of malware from PHP files. Our malware signatures are generated for real life PHP malware from live Web Hosting Servers and now you can use them for FREE!

Install Signatures ClamAV

You can add malware expert ClamAV signatures to freshclam.conf file:

DatabaseCustomURL http://cdn.malware.expert/malware.expert.ndb

DatabaseCustomURL http://cdn.malware.expert/malware.expert.hdb

DatabaseCustomURL http://cdn.malware.expert/malware.expert.ldb

DatabaseCustomURL http://cdn.malware.expert/malware.expert.fp

or direct download:

malware.expert.ndb

malware.expert.hdb

malware.expert.ldb

malware.expert.fp

malware.expert.ndb is a Generic Hex pattern PHP malware, which can cause false positive alarms, because there are generic eval, base64 and other hex pattern signatures (very low false positive rate). We want to scan all .php files and check the false positives manually for malware. If some signature causes to you problems, you can whitelist them.

malware.expert.hdb is statics MD5 pattern for files, and there are no false positive.

malware.expert.ldb is LDB signatures(read more), which use multi-words search for malware in files.
malware.expert.fp is whitelisted, what we found is that cause false positive malware.

Samples

If our signatures don’t detect malware, you can send a sample to us, so we can add them to the our database.

Samples can also be directly emailed to: samples ( at ) malware.expert

Or send us a link to the sample, so we can download it.

Whitelist specific signature

Create a file called local.ign2 or whitelist.ign2 in your ClamAV db directory. Add the signature names that you want whitelisted one per line at a time.

Example:

Malware.Expert.Generic.Eval.1

Whitelist files

Use the same name as the database in which the detection signatures exist. So if all signatures are in malware.expert.cld

The whitelisting file should be by the name malware.expert.fp and have this line (hash: size: random name) in the same dir as malware.expert.cld

5523530941c409b349ef40fa9415247e:51204:Malware.Expert.Generic.Eval.1

Despite a BAD signature existing in the malware.expert.cld. it will just IGNORE it

This article is published by Malware Expert, a web hosting modsecurity company.