Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Lumma Stealer Data Exfiltration Attempt M1"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"sock"; nocase; http.content_type; content:"multipart/form-data|3b 20|boundary|3d|ob9a91jkpa01sjqrty192"; fast_pattern; http.request_body; content:"|2d 2d|ob9a91jkpa01sjqrty192"; startswith; content:"Content-Disposition|3a 20|form-data|3b 20|name|3d 22|file|22 3b 20|filename|3d 22|fname|22|"; distance:0; content:"|0d 0a 0d 0a|PK"; distance:0; within:200; reference:md5,9bfcdde1fc8a48cf05c5a63944c2475d; classtype:trojan-activity; sid:2039423; rev:3; metadata:attack_target Client_Endpoint, created_at 2022_10_17, deployment Perimeter, deprecation_reason Relevance, malware_family lumma, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_10;)