Subvert Trust Controls T1553

Events covered

17 catalog events are tagged with this technique by at least one rule.

Authoring guide

Patterns shared across the 38 rules above: which fields they filter on, what specific values they look for, and what they exclude. The catalog normalizes field names across vendors so Sigma's Image, Elastic's process.name, and Splunk's process_name collapse into one row. Each rule contributes at most once per row.

Fields filtered most (26 distinct)

The fields most rules look at when detecting this technique. The How column shows the operators authors use (eq, wildcard, regex_match, match) and how often each appears. Sample values are concrete examples to start from, not an exhaustive list.

Top indicator values (779 distinct)

Specific (field, operator, value) combinations the rules check for, ranked by how many rules under this technique use each one. The Corpus reach column counts how many rules across the entire catalog (any technique) check the same combination. High numbers point to widely-used indicators that are likely noisy on their own; combine them with another condition for useful signal. Blank means the combination is specific to rules under this technique. Click a value to expand the rules under this technique that use it.

Exclusions (85 distinct)

Field/operator/value combinations excluded by rules under this technique (top-level not() clauses), sorted by how many rules exclude each. These are the false-positive paths the community has learned to filter out. A new rule that ignores the high-count entries here will likely fire on the same noisy paths. Click a value to expand the rules under this technique that exclude it.

Rules under this technique

Every rule in the catalog tagged with this technique, grouped by vendor. Click a rule title for its full predicates, exclusions, and indicators.

Sigma 21 rules

• Active Directory Certificate Services Denied Certificate Enrollment Request
• Certutil root certificate installation
• Kapeka Backdoor Configuration Persistence
• New Root Certificate Installed Via CertMgr.EXE
• New Root Certificate Installed Via Certutil.EXE
• Persistence Via New SIP Provider
• Potential BOINC Software Execution (UC-Berkeley Signature)
• Potential Secure Deletion with SDelete
• Renamed BOINC Client Execution
• Root Certificate Installed - PowerShell
• Root Certificate Installed From Susp Locations
• Suspicious Invoke-Item From Mount-DiskImage
• Suspicious Mount-DiskImage
• Suspicious RazerInstaller Explorer Subprocess
• Suspicious SIP or trust provider registration
• Suspicious Unblock-File
• Suspicious X509Enrollment - Process Creation
• Suspicious X509Enrollment - Ps Script
• Windows AppX Deployment Full Trust Package Installation
• Windows AppX Deployment Unsigned Package Installation
• Windows MSIX Package Support Framework AI_STUBS Execution

Elastic 6 rules

• Code Signing Policy Modification Through Built-in tools
• Code Signing Policy Modification Through Registry
• Creation or Modification of Root Certificate
• Expired or Revoked Driver Loaded
• Potential Masquerading as System32 Executable
• SIP Provider Modification

Splunk 11 rules

• Certutil Root Certificate Install (Windows Event Log)
• ISO Image Mounted - Windows (PowerShell)
• ISO Image Mounted - Windows (Windows Event Log)
• Windows Advanced Installer MSIX with AI_STUBS Execution
• Windows AppX Deployment Full Trust Package Installation
• Windows AppX Deployment Unsigned Package Installation
• Windows Developer-Signed MSIX Package Installation
• Windows Mark Of The Web Bypass
• Windows Registry Certificate Added
• Windows Registry SIP Provider Modification
• Windows SIP WinVerifyTrust Failed Trust Validation