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

SID: 2026806

Revision: 2

Class Type: trojan-activity

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, signature_severity Major, tag Ransomware, updated_at 2019_01_15, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

• md5

• 4b6f0113007cddea4ad31237add23786

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: 443

Flow: established,to_server

Contents:

• Value: "|00 00 19|e3kok4ekzalzapsf.onion.ws|00|"

Within:

PCRE:

Special Options:

• fast_pattern

source