Versions (4)
Version DetailsCurrent
Rev: 4 • Dec 11, 2017, 12:00 PMET MALWARE MSIL/NxRansomware C2 Domain Detected (0cf5ff34 .ngrok .io in DNS Lookup)
alert dns $HOME_NET any -> any any (msg:"ET MALWARE MSIL/NxRansomware C2 Domain Detected (0cf5ff34 .ngrok .io in DNS Lookup)"; dns.query; content:"0cf5ff34.ngrok.io"; endswith; reference:url,twitter.com/struppigel/status/940239612324319232; classtype:command-and-control; sid:2025143; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_12_11, deployment Perimeter, malware_family Ransomware, confidence Medium, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_16, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)
Dec 11, 2017, 12:00 PM
Sep 16, 2020, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 29, 2025, 9:34 PM
rules/emerging-malware.rules