""ET TROJAN Locky CnC checkin Nov 21""
SID: 2023551
Revision: 1
Class Type: trojan-activity
Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_11_21, deployment Perimeter, malware_family Locky, performance_impact Low, signature_severity Major, updated_at 2016_11_21
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: to_server,established
Contents:
-
Value: "POST"
-
Value: "x-requested-with|3a 20|XMLHttpRequest|0d 0a|"
-
Value: "www-form-urlencoded|0d 0a|"
Within:
PCRE: "/^(?:[A-Za-z]{1,10}=(?=[A-Za-z0-9_+\x2d\x2e%]%[A-F0-9]{2}%[A-F0-9]{2}%[A-F0-9]{2})[A-Za-z0-9_+\x2d\x2e%]+&)+(?=[a-z]{0,9}[A-Z])(?=[A-Z]{0,9}[a-z])[A-Za-z]{1,10}=(?=[A-Za-z0-9_+\x2d\x2e%]%[A-F0-9]{2}%[A-F0-9]{2}%[A-F0-9]{2})[A-Za-z0-9_+\x2d\x2e%]+\s*$/P"
Special Options:
-
http_method
-
http_header
-
http_header