""ET TROJAN Lyposit Ransomware Checkin 1""
SID: 2015957
Revision: 5
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2012_11_29, deployment Perimeter, signature_severity Major, tag Ransomware, updated_at 2013_05_20, 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: $HTTP_PORTS
Flow: established,to_server
Contents:
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Value: "GET"
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Value: "/ad" Depth: 3
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Value: "User-Agent|3a| Microsoft BITS/"
Within:
PCRE: "/^\/ad[^\x2f]*?\/\?[a-z]{1,5}\x3d\x2e?[a-z0-9]+?$/Ui"
Special Options:
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nocase
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http_method
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http_uri
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http_header