Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Arkanix Stealer CnC Checkin"; flow:established,to_server; flowbits:set,ET.Arkanix.Checkin; http.method; content:"POST"; http.uri; bsize:19; content:"/api/session/create"; http.user_agent; bsize:11; content:"Mozilla/5.0"; http.request_body; content:"|22|payload_id|22 3a 22|"; fast_pattern; pcre:"/^[a-zA-Z0-9]{31,}/R"; content:"|22|userid|22 3a 22|"; content:"|22|desktop_name|22 3a 22|"; content:"|22|hwid|22 3a 22|"; reference:url,hunting.abuse.ch/hunt/691d7ec0e73ba/arkanix.pw/#sandnet; reference:md5,643696a052ea1963e24cfb0531169477; classtype:trojan-activity; sid:2065835; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_11_19, deployment Perimeter, malware_family Arkanix_Stealer, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_19, mitre_tactic_id TA0009, mitre_tactic_name Collection, mitre_technique_id T1005, mitre_technique_name Data_from_local_system; target:src_ip;)