""ET TROJAN CBReplay.P Ransomware""

SID: 2017269

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2013_08_01, deployment Perimeter, performance_impact Moderate, signature_severity Major, tag Ransomware, updated_at 2024_04_08, 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: $HTTP_PORTS

Flow: established,to_server

Contents:

• Value: "MSIE 9.0|3b|"

• Value: !"Accept|3a|"

• Value: "User-Agent|3a|" Depth: 11

Within:

PCRE: "/^User-Agent\x3a[^\r\n]+?\sMSIE\s[^\r\n]+\r\nHost\x3a\x20\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}\r\n(\r\n)?$/Hi"

Special Options:

• http_header

• http_header

• http_header

source