""ET TROJAN Possible Linux/Moose Telnet CnC Beacon""

SID: 2021149

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2015_05_26, deployment Perimeter, signature_severity Major, tag c2, updated_at 2015_05_26, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: any

Flow: established,to_server

Contents:

  • Value: "|0e 00 00 00|" Depth: 4 Offset: 4

  • Value: !"|00|"

  • Value: !"|00|"

  • Value: "|00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00|"

  • Value: !"|00 00 00 00|" Depth: 4

Within: 28

PCRE:

Special Options:

  • fast_pattern

source