ScObfuscatorSuperCRacker

Hunt Hypothesis

This rule targets the execution of scripts or binaries associated with the ScObfuscatorSuperCRacker tool, which adversaries may use to obfuscate malicious payloads or automate credential cracking activities within the environment. Proactively hunting for this signature allows the SOC team to identify low-fidelity obfuscation techniques that might evade standard behavioral detections, ensuring early visibility into potential post-exploitation or lateral movement attempts in Azure Sentinel.

YARA Rule

rule ScObfuscatorSuperCRacker
{
      meta:
		author="malware-lu"
strings:
		$a0 = { 60 33 C9 8B 1D [4] 03 1D [4] 8A 04 19 84 C0 74 09 3C ?? 74 05 34 ?? 88 04 19 41 3B 0D [4] 75 E7 A1 [4] 01 05 [4] 61 FF 25 [4] 00 00 }

condition:
		$a0 at pe.entry_point
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

• Microsoft Defender for Endpoint — Custom indicators / advanced hunting
• Email Gateway — Attachment scanning
• File Share Monitoring — Periodic scanning of shared drives
• YARA CLI — Manual threat hunting on endpoints

This rule contains 1 string patterns in its detection logic.

• Source Rule

False Positive Guidance

• Legitimate Scripting and Automation Tasks: Enterprise IT teams often use PowerShell or Python scripts to automate configuration changes, log parsing, or data migration. These scripts may contain base64-encoded strings or obfuscated variable names to improve readability or avoid special character issues in certain shells.
  • Filter/Exclusion: Exclude processes where the parent process is a known scripting host (e.g., powershell.exe, pwsh.exe, python.exe) and the command line contains specific automation keywords like -ExecutionPolicy Bypass or -File pointing to a trusted directory (e.g., C:\Corp\Scripts\).
• Software Development and Build Pipelines: Developers and CI/CD systems (like Jenkins, Azure DevOps, or GitHub Actions) frequently use build tools that may embed obfuscated strings in intermediate artifacts or use custom compilers that produce binary blobs with high entropy. Tools like msbuild.exe, dotnet.exe, or npm might trigger this if they process complex dependency trees or minified JavaScript bundles.
  • Filter/Exclusion: Exclude processes running from standard development directories (e.g., C:\Users\<dev>\.nuget\, C:\Program Files\dotnet\) or where the parent process is a build agent (e.g., agent.exe, jenkins.exe).
• Third-Party Application Updates and Installers: Many enterprise applications (e.g., Adobe Creative Cloud, JetBrains IDEs, or SAP clients) use custom installers or update mechanisms that may employ self-extracting archives or obfuscated payloads to verify integrity or handle licensing. Tools like msiexec.exe or vendor-specific installers (e.g., AdobeUpdate.exe, JetBrainsUpdater.exe) can sometimes match generic obfuscation patterns.
  • Filter/Exclusion: Exclude processes with known vendor signatures or running from standard installation directories