Versions (3)
Version DetailsCurrent
Rev: 3 • Aug 22, 2021, 12:00 PMET DELETED SiameseKitten/Lyceum/Hexane MSIL/Shark Response - 1 Byte XOR Key
alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED SiameseKitten/Lyceum/Hexane MSIL/Shark Response - 1 Byte XOR Key"; flow:established,from_server; file.data; base64_decode:offset 0; base64_data; content:"|6e 4b 5e 4b|"; content:"|27 20|"; classtype:command-and-control; sid:2033761; rev:3; metadata:attack_target Client_Endpoint, created_at 2021_08_22, deployment Perimeter, deprecation_reason Performance, malware_family Shark, performance_impact Significant, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_08;)
Aug 22, 2021, 12:00 PM
Sep 8, 2021, 12:00 PM
Aug 22, 2021, 12:00 PM
Sep 9, 2025, 9:34 PM
rules/emerging-deleted.rules