""ET TROJAN Sharik/Smoke CnC Beacon 2""

SID: 2021631

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2015_08_14, deployment Perimeter, signature_severity Major, tag c2, updated_at 2015_08_14, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

  • md5

  • 789ee114125a6e1db363b505a643c03d

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: !"Accept"

  • Value: !"Referer|3a|"

  • Value: "Cache-Control|3a 20|no-cache|0d 0a|Pragma|3a 20|no-cache|0d 0a|Content-Type|3a 20|application/x-www-form-urlencoded|0d 0a|User-Agent|3a 20|" Depth: 104

  • Value: "Connection|3a 20|Keep-Alive|0d 0a|Content-Length|3a 20|"

Within:

PCRE: "/User-Agent\x3a[^\r\n]+(?:MSIE|rv\x3a)[^\r\n]+\r\nConnection\x3a\x20Keep-Alive\r\nContent-Length\x3a\x20\d+\r\nHost\x3a[^\r\n]+\r\n(?:\r\n)?$/Hm"

Special Options:

  • http_method

  • http_header

  • http_header

  • http_header

  • http_header

source