AmCache Forensics: Unraveling Application Activity on Windows Systems

AmCache.hve is a hidden file located in the Windows system directory (C:\Windows\AppCompat\Programs) that plays a crucial role in application compatibility and performance. While seemingly obscure, this file can be a goldmine of information for digital forensics investigators.

 

Following evidence can be retrieved from the AmCache.hve:

• Application installation
• Application first run time
• File path to the executable file
• Source of the application
• SHA-1 has value of the executable file
• Plug and Play connected devices
• Hardware Information

What is AmCache.hve?

AmCache is a database that stores metadata about applications installed and executed on the system. This information includes:

• File Paths: Full paths to executable files.
• Timestamps: Installation dates, last execution times, and modification times.
• Publisher Information: Details about the software publisher.
• Version Information: Version numbers and other relevant software details.
• Hash Values: SHA1 hashes of executable files, providing a unique fingerprint for each application.

Step1: Copy Amcache file from the location C:\Windows\AppCompat\Programs, Application use FTK Imager.


Step2: Load into the Registry Explorer
 

Machine Information. 

Inventory Application subkey: install date, application Name, Application run time.

Inventory ApplicationFile: Analyze the SHA has of the file. Suspicious file might be the malware.

Inventory Device PnP subkey: Evidence that Plug and Play device has been used into this machine.

Forensic Significance:

• Timeline Reconstruction: By analyzing the timestamps associated with applications, investigators can reconstruct the timeline of events on the system, including when applications were installed, executed, or modified.
• Malware Detection: The presence of suspicious applications, unknown files, or files with unusual timestamps can indicate potential malware infections.
• Incident Response: AmCache data can provide valuable insights into the activities of malicious actors, such as the execution of malicious software, data exfiltration, or system tampering.
• User Behavior Analysis: By examining the applications frequently accessed by a user, investigators can gain insights into their interests, activities, and potential areas of concern.

Analyzing AmCache.hve:

Several tools can be used to analyze AmCache.hve, including:

• AmCache Parser: A dedicated tool specifically designed to parse the AmCache.hve file and extract relevant information.
• Registry Explorer: Tools like Registry Explorer can be used to manually browse and analyze the contents of the AmCache.hve file.
• Forensic Analysis Tools: Advanced forensic tools such as FTK Imager, Autopsy, and The Sleuth Kit (TSK) can be used to acquire and analyze AmCache.hve as part of a broader forensic investigation.

Important Considerations:

• Data Acquisition: Acquire the AmCache.hve file as part of a proper forensic image acquisition process to maintain chain of custody and ensure data integrity.
• Legal and Ethical Considerations: Ensure that all forensic activities are conducted legally and ethically, with proper authorization and adherence to relevant laws and regulations.

Disclaimer: This information is provided for educational purposes only and should not be considered legal or professional advice. Forensic investigations should always be conducted by qualified professionals with the necessary expertise and authorization.

By carefully analyzing the data within AmCache.hve, forensic investigators can gain valuable insights into system activity, identify potential threats, and reconstruct the timeline of events on a compromised system.