""ET TROJAN Win32/Braincrypt Ransomware CnC Checkin""

SID: 2023675

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 2016_12_20, deployment Perimeter, malware_family Ransomware, malware_family Braincrypt, signature_severity Major, tag Ransomware, updated_at 2016_12_20, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

• md5

• 6b938ca31a55e743112ab34dc540a076

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: ".php?uuid="

• Value: "User-Agent|3a 20|Go-http-client/"

• Value: !"Accept|3a|"

• Value: !"Referer|3a|"

Within:

PCRE: "/.php\?uuid=[a-z0-9]{32}$/Ui"

Special Options:

• http_method

• http_uri

• http_header

• http_header

• http_header

source