""ET TROJAN BlackMatter CnC Activity""

SID: 2033643

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_08_02, deployment Perimeter, malware_family DarkSide, performance_impact Low, signature_severity Major, tag Ransomware, updated_at 2021_08_02

Reference:

  • md5

  • d0512f2063cbd79fb0f770817cc81ab3

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "Accept|3a 20|/|0d 0a|Connection|3a 20|keep-alive|0d 0a|Accept-Encoding|3a 20|gzip, deflate, br|0d 0a|Content-Type|3a 20|text/plain|0d 0a|User-Agent|3a 20|" Depth: 111

  • Value: "POST /?" Depth: 7

Within:

PCRE: "/^Accept\x3a\x20[^\r\n]+\r\nConnection\x3a\x20[^\r\n]+\r\nAccept-Encoding\x3a\x20[^\r\n]+\r\nContent-Type\x3a\x20[^\r\n]+\r\nUser-Agent\x3a\x20[^\r\n]+\r\nHost\x3a\x20[^\r\n]+\r\nContent-Length\x3a\x20[^\r\n]+\r\nCache-Control\x3a\x20[^\r\n]+[\r\n]+$/H"

Special Options:

  • http_header

  • fast_pattern

source