""ET TROJAN Win32/Tflower Ransomware CnC Checkin""
SID: 2028597
Revision: 2
Class Type: trojan-activity
Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_09_18, deployment Perimeter, deployment SSLDecrypt, former_category MALWARE, malware_family Tflower_Ransomware, signature_severity Major, tag Ransomware, updated_at 2022_03_24, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: established,to_server
Contents:
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Value: "GET"
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Value: ".php?name="
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Value: "&state=start"
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Value: !"Referer|3a|"
Within:
PCRE: "/\&state=start$/U"
Special Options:
-
http_method
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http_uri
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http_uri
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fast_pattern
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http_header