""ET TROJAN Observed DecryptmyFiles Ransomware User-Agent (uniquesession)""

SID: 2032995

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_05_18, deployment Perimeter, signature_severity Major, tag Ransomware, updated_at 2021_05_18, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

• md5

• 0e61e496fc218c1c6dc1f5640a3ac7e5

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

• Value: "User-Agent|3a 20|uniquesession|0d 0a|"

Within:

PCRE:

Special Options:

• fast_pattern

• http_header

source