""ET TROJAN Observed DarkSide Ransomware CnC Domain in TLS SNI""

SID: 2032958

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2020_12_29, deployment Perimeter, malware_family DarkSide, signature_severity Major, tag SSL_Malicious_Cert, tag Ransomware, updated_at 2020_12_29, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

• md5

• 222792d2e75782516d653d5cccfcf33b

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: 443

Flow: established,to_server

Contents:

• Value: "|16|"

• Value: "|01|"

• Value: "|00 00 13|securebestapp20.com"

Within: 8

PCRE:

Special Options:

• fast_pattern

source