Decoding VirusTotal Results: Understanding What You See

When it comes to assessing the results from VirusTotal, it’s crucial to recognize that just because only a few antivirus engines flag a file, it doesn’t mean you’re dealing with a likely false positive. This realization can fundamentally shift how we interpret these scans.

A Note of Humility

I want to clarify that I, too, have navigated this misconception in the past, so I’m not casting judgment on anyone who might be doing the same. We’re all learning here!

Recommended Resource

For those seeking a deeper understanding, I highly encourage checking out the informative video by MalwareAnalysisForHedgehogs here — it offers a well-rounded perspective on VirusTotal’s results.

Key Aspects to Analyze

1. Detection Analysis

• Reanalyze Files: Detections can evolve, so if the file hasn’t been scanned recently, running a new analysis is advisable. VirusTotal provides the history of the file’s scans.
• Malware Classification: Take note of the detected malware names. Designations such as “not-a-virus” can indicate that while the file has potential misuse, it isn’t inherently malicious. Not all antivirus vendors use this classification, so always do your due diligence.

2. File Details

• File Verification: Ensure that the file type aligns with its claimed nature.
• Submission Date: Check the file’s first submission date against the release date of the software you’re evaluating. If the submission date precedes the software’s launch, you might be looking at recycled malware.
• Alternate Names: Review the alternative names associated with the file. If these names are tangentially related or invoke unrelated concepts, you could be looking at renamed malware. However, common identifiers like “update.exe” or random strings can often be disregarded.

3. Behavioral Analysis

• File Actions: Scrutinize the files dropped, deleted, or modified. Filings should adhere to expected behaviors and locations.
• Registry Changes: A legitimate software update should not be disabling security features or system utilities.
• Suspicious Calls: Examine highlighted activities; for example, the misuse of functions like GetTickCount to evade detection in virtual machines. For more nuanced insights on such tactics, check out this [resource](https://www.fireeye.com/blog/threat-research/