""ET TROJAN Cobalt Strike Activity (GET)""
SID: 2037830
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 2022_07_26, deployment Perimeter, deployment SSLDecrypt, malware_family Cobalt_Strike, signature_severity Major, updated_at 2022_07_26, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation
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"
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Value: "/image-directory/na.png"
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Value: "|3a 20|Mozilla|2f|5|2e|0|20 28|Windows|20|NT|20|10|2e|0|3b 20|Win64|3b 20|x64|29 20|AppleWebKit|2f|537|2e|36|20 28|KHTML|2c 20|like|20|Gecko|29 20|Chrome|2f|42|2e|0|2e|2311|2e|135|20|Safari|2f|537|2e|36|20|Edge|2f|12|2e|246"
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Value: "|0d 0a|Connection|3a 20|Close|0d 0a|"
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Value: !"|0d 0a|Referer|3a 20|"
Within:
PCRE:
Special Options:
-
http_method
-
http_uri
-
http_header
-
http_header