""ET TROJAN Win32/Qbot CnC Activity M3 (POST)""

SID: 2038776

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_09_08, deployment Perimeter, deployment SSLDecrypt, malware_family Qbot, signature_severity Major, updated_at 2022_09_08

Reference:

• md5

• da51dd657868bf4d2924b4398e045b27

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: !$HTTP_PORTS

Flow: established,to_server

Contents:

• Value: "POST|20|/t5|20|HTTP/1.1|0d 0a|"

• Value: "Accept|3a 20|application/x-shockwave-flash, image/gif, image/jpeg, image/pjpeg, /|0d 0a|"

• Value: !"Referer|3a 20|"

Within:

PCRE: "/\r\n\r\n[A-Za-z0-9]{3,20}=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})/si"

Special Options:

• fast_pattern

source