Rule History

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET RETIRED ISMAgent Receiving Commands from CnC Server"; flow:from_server,established; content:"|23|command|23 23|systeminfo"; offset:36; fast_pattern; content:"&&"; distance:0; reference:md5,a70a08a1e17b820c7dc8ee1247d6bfa2; reference:url,researchcenter.paloaltonetworks.com/2017/07/unit42-oilrig-uses-ismdoor-variant-possibly-linked-greenbug-threat-group/; classtype:command-and-control; sid:2024503; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_07_28, deployment Perimeter, former_category MALWARE, malware_family Ismdoor, performance_impact Moderate, signature_severity Major, updated_at 2024_09_16, reviewed_at 2024_09_16;)