Cross-Platform Rule Translation: From Sigma to CrowdStrike with Uncoder AI

How It Works

Uncoder AI takes structured detection content written in Sigma, a popular open detection rule format, and automatically converts it into platform-specific logic — in this case, CrowdStrike Endpoint Search syntax.

The Sigma rule describes a technique where Deno (a secure JavaScript runtime) downloads and writes potentially malicious DLLs via HTTP(S) directly to directories such as AppData or Users.

Left Panel – Sigma Detection Rule:

The rule specifies:

• Logsource: Windows file events
  
• TargetFileName conditions: Matching file paths like \deno\gen, \deno\remote\https, \Users\, or \AppData\
  

MITRE tags: Execution, Command-and-Control (T1059.007, T1105)

Explore Uncoder AI

Right Panel – CrowdStrike Query Output:

Uncoder AI generates equivalent logic using the CrowdStrike query syntax. It maintains the same behavioral logic (suspicious Deno file paths) while translating:

• YAML fields into CrowdStrike-compatible fields like TemporaryFileName and TargetFileName
  
• Logical nesting (or , and) and regex-style path matching
  
• Full preservation of detection intent and structure
  

Why It’s Innovative

Manual rule conversion across platforms is tedious, error-prone, and often requires in-depth vendor-specific knowledge. With Uncoder AI:

• Cross-SIEM detection logic is automatically normalized and converted
  
• Regex, file path semantics, and logical conditions are precisely preserved
  
• Time-to-deploy is reduced from hours to seconds
  

LLMs trained on platform syntax rules ensure that the converted output respects each vendor’s query constraints while aligning with the original detection behavior.

Operational Value

For detection engineers and SOC teams, this feature delivers:

• Rapid content reuse across heterogeneous security stacks (e.g., SOCs using both Sigma and CrowdStrike).
  
• Preserved detection quality thanks to semantic-aware AI translation.
  
• Scalable threat coverage without duplicating engineering effort per platform.
  
• Lower onboarding curve for junior analysts unfamiliar with CrowdStrike’s syntax.
  

Uncoder AI empowers organizations to operationalize Sigma content instantly in CrowdStrike environments, keeping pace with adversarial techniques like Deno-based remote execution.

Explore Uncoder AI