""ET TROJAN Ransomware Win32/WinPlock.A Successfully Installed CnC Beacon""

SID: 2021853

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2015_09_30, deployment Perimeter, signature_severity Major, tag c2, updated_at 2015_09_30, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

• md5

• b8a1012e3afc6eabb7819ce4d8e2b93b

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

• Value: "POST"

• Value: !"Referer|3a|"

• Value: "M STATE|3a 20|INSTALL|0d 0a|"

Within:

PCRE:

Special Options:

• http_method

• http_header

• http_client_body

source