Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Cobalt Strike Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/loadercrypt_"; startswith; fast_pattern; content:".php?vid="; distance:32; within:9; isdataat:171,relative; http.user_agent; content:"Mozilla/5.0|20|(Windows|20|NT|20|6.1)|20|AppleWebKit/587.38"; bsize:47; reference:url,twitter.com/malwrhunterteam/status/1452992872928661512; reference:md5,aa1add403d79f0ae38f8b0aed2fcb0c2; classtype:trojan-activity; sid:2034267; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_10_27, deployment Perimeter, confidence Medium, signature_severity Major, tag c2, updated_at 2021_10_27, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)