Versions (5)
Version DetailsCurrent
Rev: 1 • Aug 22, 2021, 12:00 PMET MALWARE SiameseKitten/Lyceum/Hexane MSIL/Shark Uploading to CnC
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE SiameseKitten/Lyceum/Hexane MSIL/Shark Uploading to CnC"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"?q="; content:"o543n"; endswith; fast_pattern; http.user_agent; content:"|28|Windows|20|NT|20|10.0|3b 20|Win64|3b 20|x64|29|"; http.request_body; content:"|7b 22|Data|22 3a 5b 22|"; startswith; pcre:"/^(?:[A-Z0-9+/]{4})*(?:[A-Z0-9+/]{2}==|[A-Z0-9+/]{3}=|[A-Z0-9+/]{4})/R"; content:"|22 5d 7d|"; classtype:command-and-control; sid:2033762; rev:1; metadata:created_at 2021_08_22, malware_family Shark, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_08_22;)
Aug 22, 2021, 12:00 PM
Aug 22, 2021, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 9, 2025, 9:34 PM
rules/emerging-malware.rules