ThemidaOreansTechnologies2004

Hunt Hypothesis

This hunt hypothesis targets the execution of binaries associated with Themida Orean Technologies, a known software protection and licensing solution often utilized by legitimate applications but potentially leveraged by adversaries for obfuscation or persistence. Proactively hunting for this signature in Azure Sentinel allows the SOC team to distinguish between expected deployment patterns and anomalous usage that could indicate an attacker exploiting trusted tools to mask malicious activities within the environment.

YARA Rule

rule ThemidaOreansTechnologies2004
{
      meta:
		author="malware-lu"
strings:
		$a0 = { B8 00 00 00 00 60 0B C0 74 58 E8 00 00 00 00 58 05 43 00 00 00 80 38 E9 75 03 61 EB 35 E8 }

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

Here are 5 specific false positive scenarios for the ThemidaOreansTechnologies2004 detection rule, tailored for an enterprise environment:

• Scenario: Legitimate execution of Oracle Database (19c) patching scripts during a scheduled maintenance window. The YARA rule often flags the oracle.exe process or associated Java Virtual Machine components when they load specific Themida-protected DLLs used in Oracle’s licensing and security modules.

  • Filter/Exclusion: Exclude processes with the command line containing ORACLE_HOME where the parent process is msiexec.exe or wuauserv.exe, specifically during the defined maintenance window (e.g., Sundays 02:00–04:00 UTC).

• Scenario: Deployment of enterprise-wide antivirus updates via Microsoft Endpoint Configuration Manager (SCCM). The rule triggers when SCCM deploys a specific agent update that utilizes Themida-protected components for integrity verification, often appearing as a new executable in the C:\Program Files\Oracle\ directory.

  • Filter/Exclusion: Create an exclusion based on the file path pattern *\\Program Files\\Microsoft Configuration Manager\\* and exclude any process where the publisher is “Microsoft Corporation” or “Oracle Corporation” with a valid digital signature.

• Scenario: Execution of SAP NetWeaver business intelligence reporting jobs running as a background service. These jobs frequently invoke protected middleware components that match the Themida signature, particularly when generating end-of-day financial reports involving encrypted data streams.

  • Filter/Exclusion: Exclude processes where the image path contains SAP\ and the user context is a dedicated service account (e.g., DOMAIN\SAP_SERVICE_ACCOUNT), excluding interactive logon sessions for this specific rule.

• Scenario: Automated backup verification tasks performed by **Vee