Versions (4)
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Rev: 2 • Feb 3, 2022, 12:00 PMET MALWARE Subterranean Crimson Rat - AssignID Command
alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Subterranean Crimson Rat - AssignID Command"; flow:established,to_client; content:"crimson.universal.containers.Message"; content:"CLIENT_assignID"; nocase; fast_pattern; content:"|00|"; within:4; pcre:"/^.\d{1,2}\.\d+\.\d+/R"; reference:url,twitter.com/James_inthe_box/status/1488987814066753538; classtype:trojan-activity; sid:2035070; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_02_03, deployment Perimeter, malware_family Subterranean_Crimson, confidence High, signature_severity Major, tag RAT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_02_03;)
Feb 3, 2022, 12:00 PM
Feb 3, 2022, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 5, 2025, 9:34 PM
rules/emerging-malware.rules