""ET TROJAN Win32/HydraCrypt CnC Beacon 1""

SID: 2022495

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2016_02_08, deployment Perimeter, signature_severity Major, tag c2, updated_at 2016_02_08, 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: $HTTP_PORTS

Flow: established,to_server

Contents:

• Value: "GET"

• Value: "/flamme.php"

• Value: !"User-Agent|3a|"

• Value: !"Accept"

• Value: !"Referer|3a|"

• Value: "Host|3a|" Depth: 5

Within:

PCRE: "/^Host\x3a[^\r\n]+\r\nConnection\x3a\x20Keep-Alive\r\nCache-Control\x3a no-cache+\r\n(?:\r\n)?$/H"

Special Options:

• http_method

• http_uri

• http_header

• http_header

• http_header

• http_header

source