""ET TROJAN Win32/Denisca.A CnC Beacon""

SID: 2021385

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2015_07_07, deployment Perimeter, signature_severity Major, tag c2, updated_at 2015_07_07, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

  • md5

  • 0075c4d976984436443b30926ad818dd

Protocol: udp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: any

Flow:

Contents:

  • Value: "|7c 2a 26|" Depth: 3

  • Value: "|7c|"

  • Value: "|7c|"

  • Value: "|7c|"

Within: 1

PCRE: "/\x7c[a-f0-9]{16}\x7c\d+\x7c$/"

Special Options:

  • fast_pattern

source