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SIP Provider Modificationedit

Identifies modifications to the registered Subject Interface Package (SIP) providers. SIP providers are used by the Windows cryptographic system to validate file signatures on the system. This may be an attempt to bypass signature validation checks or inject code into critical processes.

Rule type: eql

Rule indices:

  • logs-endpoint.events.*
  • endgame-*

Severity: medium

Risk score: 47

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Defense Evasion
  • Elastic Endgame

Version: 101 (version history)

Added (Elastic Stack release): 7.12.0

Last modified (Elastic Stack release): 8.6.0

Rule authors: Elastic

Rule license: Elastic License v2

Rule queryedit

registry where event.type:"change" and registry.path: (
"*\\SOFTWARE\\Microsoft\\Cryptography\\OID\\EncodingType
0\\CryptSIPDllPutSignedDataMsg\\{*}\\Dll",
"*\\SOFTWARE\\WOW6432Node\\Microsoft\\Cryptography\\OID\\EncodingType
0\\CryptSIPDllPutSignedDataMsg\\{*}\\Dll", "*\\SOFTWARE\\Microsoft
\\Cryptography\\Providers\\Trust\\FinalPolicy\\{*}\\$Dll", "*\\SOF
TWARE\\WOW6432Node\\Microsoft\\Cryptography\\Providers\\Trust\\FinalPo
licy\\{*}\\$Dll" ) and registry.data.strings:"*.dll"

Threat mappingedit

Framework: MITRE ATT&CKTM

Rule version historyedit

Version 101 (8.6.0 release)

  • Updated query, changed from:

    registry where event.type:"change" and registry.path: (
"HKLM\\SOFTWARE\\Microsoft\\Cryptography\\OID\\EncodingType
0\\CryptSIPDllPutSignedDataMsg\\{*}\\Dll", "HKLM\\SOFTWARE\\WOW643
2Node\\Microsoft\\Cryptography\\OID\\EncodingType
0\\CryptSIPDllPutSignedDataMsg\\{*}\\Dll", "HKLM\\SOFTWARE\\Micros
oft\\Cryptography\\Providers\\Trust\\FinalPolicy\\{*}\\$Dll", "HKL
M\\SOFTWARE\\WOW6432Node\\Microsoft\\Cryptography\\Providers\\Trust\\F
inalPolicy\\{*}\\$Dll" ) and registry.data.strings:"*.dll"
Version 100 (8.5.0 release)
  • Formatting only
Version 3 (8.4.0 release)
  • Formatting only
Version 2 (8.1.0 release)
  • Formatting only
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