""ET TROJAN Bedep HTTP POST CnC Beacon""
SID: 2021418
Revision: 7
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2015_07_15, deployment Perimeter, signature_severity Major, tag c2, updated_at 2016_02_23, 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: "POST"
-
Value: ".php"
-
Value: "Accept|3a 20|text/html, application/xhtml+xml, /|0d 0a|"
Within:
PCRE: "/^(?:Connection\x3a[^\r\n]+\r\n)?(?:Content-Type\x3a[^\r\n]+\r\n)?Accept\x3a[^\r\n]+\r\n(?:Accept-Encoding\x3a[^\r\n]+\r\n)?Accept-Language\x3a[^\r\n]+\r\n(?:Content-Type\x3a[^\r\n]+\r\n)?(?:Referer\x3a[^\r\n]+.php[^\r\n]*?\r\n)?User-Agent\x3a[^\r\n]+(?: MSIE |rv\x3a11)/Hi"
Special Options:
-
http_method
-
http_uri
-
http_header