""ET TROJAN W32/Depyot.Downloader CnC Beacon""

SID: 2016638

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2013_03_22, deployment Perimeter, signature_severity Major, tag c2, updated_at 2013_03_22, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

• Link

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

• Value: "/pdf.php?id="

• Value: "User-Agent|3A| Mozilla/4.0 (compatible)|0D 0A|"

Within:

PCRE:

Special Options:

• http_uri

• fast_pattern

• http_header

source