""ET TROJAN Alfa/Alpha Ransomware Checkin""
SID: 2023083
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_08_22, deployment Perimeter, former_category MALWARE, signature_severity Major, tag Ransomware, updated_at 2023_05_03, 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: $HTTP_PORTS
Flow: established,to_server
Contents:
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Value: "|20|HTTP/1.1|0d 0a|Host|3a 20|"
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Value: "GET"
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Value: !"Accept"
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Value: !"Connection|3a|"
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Value: !"Cache-Control|3a|"
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Value: !"Pragma|3a|"
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Value: !"Referer|3a|"
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Value: !"User-Agent|3a|"
Within:
PCRE: "/^GET\x20\/[A-F0-9]{32}\x20HTTP\/1.1\r\nHost\x3a\x20[^\r\n]+\r\n\r\n$/"
Special Options:
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http_method
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http_header
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http_header
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http_header
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http_header
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http_header
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http_header