""ET TROJAN W32/Asprox.Bot Knock Variant CnC Beacon""
SID: 2018574
Revision: 1
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2014_06_17, deployment Perimeter, signature_severity Major, tag c2, updated_at 2014_06_17, 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: $HTTP_PORTS
Flow: established,to_server
Contents:
-
Value: "POST"
-
Value: !"Referer"
-
Value: "
" Depth: 7 -
Value: "
" -
Value: "
" -
Value: "
" -
Value: "
"
Within: 6
PCRE: "/^Host\x3a\x20\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}(?:\x3a\d{1,5})\r$/Hmi"
Special Options:
-
http_method
-
http_header
-
fast_pattern
-
http_client_body
-
http_client_body
-
http_client_body
-
http_client_body
-
http_client_body