Disclosed hacktool set (old stuff) - file Inject.exe

Hunt Hypothesis

This detection identifies adversary activity involving legacy hacking tools, specifically the Inject.exe process, which may indicate an attacker leveraging outdated utilities to establish persistence or execute malicious payloads within the environment. A proactive hunt is essential in Azure Sentinel to uncover these potentially overlooked artifacts that could serve as a foothold for lateral movement or data exfiltration before they evolve into more complex threats.

YARA Rule

rule ByPassFireWall_zip_Folder_Inject {
	meta:
		description = "Disclosed hacktool set (old stuff) - file Inject.exe"
		author = "Florian Roth"
		date = "23.11.14"
		score = 60
		hash = "34f564301da528ce2b3e5907fd4b1acb7cb70728"
	strings:
		$s6 = "Fail To Inject" fullword ascii
		$s7 = "BtGRemote Pro; V1.5 B/{" fullword ascii
		$s11 = " Successfully" fullword ascii
	condition:
		all of them
}

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 3 string patterns in its detection logic.

• Source Rule

False Positive Guidance

Here are 5 specific false positive scenarios for the Disclosed hacktool set (old stuff) - file Inject.exe detection rule, along with targeted filtering strategies:

• Scenario: Legacy Patch Management Deployment

  • Context: Enterprise endpoints running older versions of Microsoft SCCM (System Center Configuration Manager) or Ivanti Neurons often utilize a legacy agent named Inject.exe to push security patches and configuration updates during maintenance windows. This executable frequently resides in the C:\Program Files\Microsoft Configuration Manager\ directory and exhibits behavior similar to known hacktools due to its injection capabilities.
  • Suggested Filter: Exclude files where the path matches *Configuration Manager\Inject.exe AND the file hash matches a known baseline from your CM server.

• Scenario: Scheduled Antivirus Definition Updates

  • Context: The Symantec Endpoint Protection (SEP) or McAfee Endpoint Security suite often employs a background service component named Inject.exe to handle real-time definition updates and heuristic scanning tasks. This process is frequently triggered by the Windows Task Scheduler under the name “Antivirus Update Job” during off-hours, mimicking the behavior of a hacktool injection mechanism.
  • Suggested Filter: Create an exclusion for processes where the Parent Process is seclient.exe (Symantec) or mfevcs.exe (McAfee) and the file location is within the vendor’s installation directory (e.g., C:\Program Files\Common Files\Symantec Shared\).

• Scenario: Remote Desktop Session Initialization

  • Context: In environments utilizing Citrix Workspace or Microsoft Remote Desktop Services, a utility named Inject.exe is often spawned to inject session policies, load user profiles, and manage clipboard redirections when an administrator logs in remotely. This activity can trigger