Versions (2)
Version DetailsCurrent
Rev: 1 • Sep 17, 2025, 12:00 PMET MALWARE FrigidBackdoor Poll for Commands
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE FrigidBackdoor Poll for Commands"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/api/external/machines/commands/"; startswith; fast_pattern; http.user_agent; content:"Go-http-client"; http.accept_enc; content:"gzip"; reference:url,moonlock.com/macc-stealer-macsync-backdoor; classtype:trojan-activity; sid:2064775; rev:1; metadata:affected_product Mac_OSX, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_09_17, deployment Perimeter, confidence High, signature_severity Major, tag Stealer, tag Backdoor, tag Description_Generated_By_Proofpoint_Nexus, tag FrigidStealer, tag FrigidBackdoor, updated_at 2025_09_17, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)
Sep 17, 2025, 12:00 PM
Sep 17, 2025, 12:00 PM
Sep 17, 2025, 9:34 PM
Sep 18, 2025, 8:36 PM
rules/emerging-malware.rules