Versions (2)
Version DetailsCurrent
Rev: 3 • Feb 21, 2025, 12:00 PMET MALWARE implant.js Windows Beacon Check-in
alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE implant.js Windows Beacon Check-in"; flow:established,to_server; flowbits:isset,ET.implantjs.syn; dsize:1; content:"|c2|"; reference:url,github.com/captainGeech42/implant.js; reference:url,districtcon.org/bios-and-talks-2025/implantjs-modular-malware; classtype:trojan-activity; sid:2060256; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, created_at 2025_02_21, deployment Perimeter, malware_family implant_js, performance_impact Moderate, confidence High, signature_severity Major, tag c2, updated_at 2026_05_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel; target:src_ip;)
Feb 21, 2025, 12:00 PM
May 21, 2026, 12:00 PM
Feb 25, 2025, 5:11 AM
May 21, 2026, 9:34 PM
rules/emerging-malware.rules