""ET TROJAN Synapse/Lambda Ransomware CnC Checkin""
SID: 2050809
Revision: 1
Class Type: trojan-activity
Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_and_Server, created_at 2024_02_13, deployment Perimeter, malware_family Synapse, malware_family Lambda, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_02_13
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: "POST"
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Value: ".php"
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Value: "AppleWebKit/587.38|20 28|KHTML, like Gecko|29|"
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Value: "J325q4JURN" Depth: 10
Within:
PCRE: "/^User-Agent\x3a\x20[^\r\n]+AppleWebKit\//587.38\x20\x28KHTML,\x20like\x20Gecko\x29/Hmi"
Special Options:
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http_method
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http_uri
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http_header
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http_client_body
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fast_pattern