Decoding VirusTotal Results: Understanding Detections and Insights

Navigating the world of cybersecurity can be daunting, especially when it comes to interpreting the results from tools like VirusTotal. One common misconception is the assumption that if only a handful of antivirus (AV) programs flag a file, it’s likely a false positive. However, this is not always the case. Let’s delve deeper into the nuances of VirusTotal results to help you make more informed conclusions.

A Learning Journey

It’s important to acknowledge that I once shared the same misconception. Understanding the intricacies of VirusTotal has been a learning journey for me, and I don’t judge anyone for being in the same position.

For an excellent introduction to VirusTotal and how to interpret its findings, I recommend checking out the following video by MalwareAnalysisForHedgehogs: Watch Here.

Key Aspects of VirusTotal Analysis

Detection Insight
Always consider reanalyzing the file if it hasn’t been scanned recently. Detection capabilities can evolve, and files are periodically reassessed in VirusTotal’s database.
Pay attention to the names of detected malware. Common terms like “not-a-virus” indicate that while the file may not be outright malicious, it has the potential to be misused.
File Details Examination
Confirm that the file type matches its advertised identity.
Look at the first submission date. If it predates the release of the Software or file in question, it might be an instance of recycled malware.
Be cautious of alternative names used for the file. If these labels suggest something entirely different, it may indicate that the original malware has been renamed (note, however, that generic names like update.exe or test.pdf can often be disregarded).
Behavior Analysis
Investigate the behavior of the file—what files it creates or deletes, what data it writes, etc. If it accesses unnecessary areas, that could be a red flag.
Similarly, assess its impact on system processes. For example, a legitimate Software update shouldn’t be disabling core utilities like Windows Defender or Task Manager.
Be attentive to atypical API calls, such as GetTickCount. Some malware uses these calls to identify virtual machines, thereby avoiding detection