Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Vidar Variant/Mars Stealer CnC Exfil"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.request_body; content:"Content-Disposition|3a 20|form-data|3b 20|name=|22|file|22 0d 0a 0d 0a|"; content:".zip|0d 0a|"; distance:0; within:50; content:"|0d 0a|PK"; distance:0; content:"system.txt"; distance:0; fast_pattern; http.header_names; content:!"Referer"; content:!"User-Agent"; reference:md5,8124a572f854007e63cc7337547a37af; reference:md5,673410a381f324b0209abf1175415206; reference:url,3xp0rt.com/posts/mars-stealer; classtype:trojan-activity; sid:2033163; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_06_23, deployment Perimeter, malware_family Win32_Vidar, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_23;)