""ET TROJAN Win32/HydraCrypt CnC Beacon 3""

SID: 2020503

Revision: 3

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2015_02_24, deployment Perimeter, signature_severity Major, tag c2, updated_at 2016_12_23, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

• md5

• e4ab12da8828a7f1e6c077a2999f8320

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: "/upd.php"

• Value: !"User-Agent|3a|"

• Value: !"Accept"

Within:

PCRE: "/^(?:Referer\x3a[^\r\n]+\r\n)?Host\x3a[^\r\n]+\r\n(?:\r\n)?$/H"

Special Options:

• http_method

• http_uri

• http_header

• http_header

source