You mother fucker. Stop sending spam. Thank you Jayanth D
On Mon, Feb 25, 2019 at 4:43 AM Satwik B via clamav-users < clamav-users@lists.clamav.net> wrote: > Hello, > > I am trying to generate clamav signatures for a malware dataset that I > have. > > Initially I have recognized some strings which are prominent in a class of > malware, hence, those are considered and a ldb signature is generated using > the below method. > > The name of the signature, Engine version, Target as 0. We further have > 'x' number of sub-signatures here x is 100 each with logical or. All the > strings are converted to hex representation. Below is the example which is > generated. > > > ramnit.Signature;Engine:0-500,Target:0;0|1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31|32|33|34|35|36|37|38|39|40|41|42|43|44|45|46|47|48|49|50|51|52|53|54|55|56|57|58|59|60|61|62|63|64|65|66|67|68|69|70|71|72|73|74|75|76|77|78|79|80|81|82|83|84|85|86|87|88|89|90|91|92|93|94|95|96|97|98|99;636f6e6e6;686b65795;363530393;52656c656;633a5c5c7;436f6e766;313937313;6c6f63616;576169744;363337363;686b65795;353238363;736c65657;633a5c5c7;636f6e6e6;686b65795;633a5c5c7;737663686;363030363;633a5c5c7;313935353;633a5c5c7;636f6e6e6;6765746d6;536574437;313933393;686b65795;633a5c5c7;323232363;353537363;686b65795;686b65795;686b65795;686b65795;686b65795;686b65795;686b65795;686b65795;353130363;64656c657;633a5c5c7;633a5c5c7;686b65795;53656e644;6b7975666;6c6f63616;494d41474;686b65795;686b65795;686b65795;696573716;737663686;313237303;363033353;363039383;686b65795;686b65795;633a5c5c7;686b65795;333139313;686b65795;437265617;686b65795;476574546;353631323;633a5c5c7;686b65795;496e74657;686b65795;686b65795;686b65795;686b65795;3f7365745;633a5c5c7;476574537;527063426;686b65795;686b65795;566572517;353630353;686b65795;4f70656e5;353138343;4c6f6f6b7;633a5c5c7;476574546;363139393;633a5c5c7;686b65795;353638333;676574707;6f6c65333;5065656b4;343230353;536574576;5c5c3f3f5;5265674f7;633a5c5c7;686b65795;686b65795 > > Now, the problem is in case there are <=65 sub-signatures then everything > works fine however, if they increase beyond that, it results in the > following error. > > LibClamAV Error: cli_loadldb: The number of subsignatures (== 65) doesn't > match the IDs in the logical expression (== 100) > LibClamAV Error: Problem parsing database at line 1 > LibClamAV Error: Can't load ramnit.ldb: Malformed database > ERROR: Malformed database > > Is it that the ldb signatures are limited to only 65 conditions? If not > what causes this issue and how to solve it? > > -- > Satwik > > _______________________________________________ > > clamav-users mailing list > clamav-users@lists.clamav.net > https://lists.clamav.net/mailman/listinfo/clamav-users > > > Help us build a comprehensive ClamAV guide: > https://github.com/vrtadmin/clamav-faq > > http://www.clamav.net/contact.html#ml >
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