""ET TROJAN BalkanDoor CnC Checkin""

SID: 2027897

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 2019_08_19, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2019_08_19

Reference:

• md5

• f70ef75fb0a51b05c43aaec973ac0bc1

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?s="

• Value: "&cn="

• Value: !"Referer"

Within:

PCRE: "/.php\?s=\d+&cn=/U"

Special Options:

• http_method

• http_uri

• fast_pattern

• http_uri

• http_header

source