""ET TROJAN Observed Karen Ransomware Domain (karen .h07 .wlh .io in TLS SNI)""

SID: 2033774

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_08_23, deployment Perimeter, former_category MALWARE, signature_severity Major, tag Ransomware, updated_at 2021_08_23, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: 443

Flow: established,to_server

Contents:

  • Value: "|16|" Depth: 1

  • Value: "|01|"

  • Value: "|00 00 10|karen.h07.wlh.io"

Within:

PCRE:

Special Options:

source