""ET TROJAN Various Ransomware/Stealer Style External IP Address Check (myip .ch)""

SID: 2029933

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 2020_04_20, deployment Perimeter, signature_severity Major, tag Ransomware, updated_at 2023_03_21, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

  • md5

  • c596d787d0848722d393a4a5945b3e15

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: "/"

  • Value: "Host|3a 20|www.myip.ch|0d 0a|Accept|3a 20|/|0d 0a 0d 0a|" Depth: 34

  • Value: !"Referer|3a|"

  • Value: !"User-Agent|3a|"

  • Value: !"Cache"

  • Value: !"Pragma"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_header

  • fast_pattern

  • http_header

  • http_header

  • http_header

  • http_header

source