SID: 2036632

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_05_19, deployment Perimeter, malware_family Cobalt_Strike, signature_severity Major, tag TA416, updated_at 2022_05_19, 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: "GET"

  • Value: "/maps/overlaybfpr?q=" Depth: 20

  • Value: "User-Agent|3a 20|Mozilla/5.0|20|"

  • Value: "Cookie|3a 20|SRCHD=AF=NOFORM|3b|_SS="

Within:

PCRE: "/^SRCHD=AF=NOFORM|3b|_SS=(?:[A-Za-z0-9+=/]{172})$/C"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

source