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SID: 2026806 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 3Jan 15, 2019, 12:00 PM

ET MALWARE Observed Cryptor Ransomware CnC Domain (e3kok4ekzalzapsf .onion .ws in TLS SNI)

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Cryptor Ransomware CnC Domain (e3kok4ekzalzapsf .onion .ws in TLS SNI)"; flow:established,to_server; tls.sni; content:"e3kok4ekzalzapsf.onion.ws"; endswith; reference:md5,4b6f0113007cddea4ad31237add23786; classtype:command-and-control; sid:2026806; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_01_15, deployment Perimeter, malware_family CryptorRansomware, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_16, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)

Jan 15, 2019, 12:00 PM

Sep 16, 2020, 12:00 PM

Sep 21, 2024, 3:00 AM

Sep 25, 2025, 9:34 PM

rules/emerging-malware.rules