""ET TROJAN [TGI] Cobalt Strike Malleable C2 Request (O365 Profile)""

SID: 2028588

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_09_17, deployment Perimeter, malware_family Cobalt_Strike, signature_severity Major, updated_at 2019_09_17, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "/owa/?wa=" Depth: 9

  • Value: "&path=/calendar"

  • Value: "MicrosoftApplicationsTelemetryDeviceId=" Depth: 39

  • Value: "|3b|ClientId="

  • Value: "|3b|MSPAuth="

  • Value: "|3b|xid="

  • Value: "|3b|wla42="

  • Value: !"Referer|3a|"

Within:

PCRE: "/&path=\/calendar$/U"

Special Options:

  • http_uri

  • http_uri

  • fast_pattern

  • http_cookie

  • http_cookie

  • http_cookie

  • http_cookie

  • http_cookie

  • http_header

source