Rule History

alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING HTTP POST Request XOR Key f9"; flow:established,to_server; content:"|a9 b6 aa ad d9 d6|"; startswith; fast_pattern; content:"|d9 b1 ad ad a9 d6|"; distance:0; classtype:misc-activity; sid:2038467; rev:2; metadata:attack_target Client_and_Server, created_at 2022_08_09, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_08_10, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information;)