alert udp $HOME_NET any -> any 53 (msg:"ET MALWARE ELF.MrBlack DOS.TF Malformed Lookup (/lib32/libc.so.6)"; content:"|01|"; offset:2; depth:1; content:"|00 01 00 00 00 00 00|"; distance:1; within:7; content:"|0b|/lib32/libc|02|so|01|6|00|"; fast_pattern; distance:0; nocase; reference:md5,312fa52a7992e58359cb68bb0f029ea7; reference:url,blog.malwaremustdie.org/2016/01/mmd-0048-2016-ddostf-new-elf-windows.html; classtype:trojan-activity; sid:2022335; rev:3; metadata:created_at 2016_01_07, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_08_29;)