""ET TROJAN HiddenTears Ransomware Activity (GET)""

SID: 2032320

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_03_24, deployment Perimeter, malware_family Ransomware, signature_severity Major, tag Ransomware, updated_at 2021_03_24, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

  • md5

  • 28b0ef0c832916a852ddf0c3c5427be3

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: "/alertmsg.zip"

  • Value: ".tk|0d 0a|"

  • Value: !"User-Agent|3a 20|"

  • Value: !"Referer|3a 20|"

  • Value: !"Accept"

Within:

PCRE: "/^Host[^\r\n]+.tk/Hmi"

Special Options:

  • http_method

  • fast_pattern

  • http_uri

  • http_header

  • http_header

  • http_header

  • http_header

source