1200KM / detection
T1689 Downgrade Attack — Detection Rules
Detection workspace for T1689 Downgrade Attack: 1 Sigma sources, 0 Atlas concepts and 0 anomaly models. No live detection validation.
Source-backed rule directory
- LSA PPL Protection Setting Modification via CommandLine · test · medium · {"category":"process_creation","product":"windows"}
Atlas deterministic concepts
No exact concept selected.
Anomaly models
No exact Atlas model in this snapshot.
ATT&CK analytic guidance
DET0350 Detecting Downgrade Attacks
AN0995 Analytic 0995
Detection of processes launching downgraded PowerShell versions (e.g., v2) or other legacy binaries that lack logging or security features. Correlates command-line arguments, process metadata, and version fields. Monitors registry changes to Defender or HVCI keys that could indicate intentional downgrades.
AN0996 Analytic 0996
Monitors execution of older or legacy interpreters (e.g., python2, bash with restricted history logging), downgrade of TLS/SSL configurations, or forced fallback to unencrypted protocols. Detects suspicious reconfiguration of kernel modules or boot loaders to reduce integrity controls.
AN0997 Analytic 0997
Detection of execution of legacy scripting runtimes (e.g., older versions of Python, Bash, or PowerShell Core) lacking auditing. Monitoring for changes to EFI or system boot files indicative of downgrade-based persistence or bypass of integrity features.
Connected ecosystem references
Linked tags
Simulation, tools and telemetry
Existing anomaly research
Complete technique engineering workbook
Collection configuration and event examples · Anomaly models and design worksheet · Tools and documented software · Simulation procedures · Offline synthetic collection check
Exact source tags are not semantic relevance verdicts. Review actual rule conditions and observation points; imported rules are not backend-compiled or live-validated.
Pinned research references. No browser attack runner or production-validated detector is asserted. Imported procedures remain unvalidated; any bounded lab evidence has its own scope. ATT&CK / Atomic provenance · Detection provenance.