""ET TROJAN Win32/Sarwent Initial Checkin CnC Response""

SID: 2029475

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 2020_02_17, deployment Perimeter, malware_family Sarwent, performance_impact Low, signature_severity Major, updated_at 2020_02_17

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: established,from_server

Contents:

• Value: "200"

• Value: "|20|IP|20|"

• Value: "|20 2e 20 2e 20 2e 20 2e 20 2e 20|"

• Value: "DNS-"

• Value: "|20 2e 20 2e 20 2e 20 3a 20|"

• Value: "|0d 0a 20 20 20|DHCP|20|"

Within: 10

PCRE: "/^(?:[a-f0-9]{2}-){5}[a-f0-9]{2}/R"

Special Options:

• http_stat_code

• file_data

• fast_pattern

source