Decoding VirusTotal Results: A Guide to Accurate Interpretation
As a seasoned member of the cybersecurity community, I’ve come to realize that deciphering VirusTotal (VT) results requires a more nuanced approach than merely labeling them as ‘probably false positives’ when only a handful of antivirus (AV) solutions flag them. This post aims to share insights I’ve gained in this area, with the hope of guiding others toward a clearer understanding.
A Word of Caution
Before I delve into the intricacies of VirusTotal, I want to clarify that I held similar misconceptions until quite recently. My goal here is to help others navigate this complex landscape without the same misjudgments.
Recommended Resources
For those seeking a comprehensive introduction to interpreting VT results, I highly recommend watching the insightful video by MalwareAnalysisForHedgehogs. It serves as a great backdrop for the points discussed below.
Key Factors to Consider
- Detection Dynamics
- Reanalysis: Always check if the file has been rescanned recently. Detection rates can fluctuate over time.
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malware Nomenclature: Pay attention to the terminology used by AV vendors. Labels like “not-a-virus” can clarify that while the file in question may not be outright malicious, it can potentially be exploited for harmful purposes.
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File Integrity
- File Type Verification: Ensure the file is genuinely what it claims to be.
- Submission Dates: Investigate the first submission date. If it predates the official release of the Software or file you’re examining, it may indicate that the file is recycled malware.
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Alternative Naming: Review other aliases associated with the file. Names that seem irrelevant may suggest that the file has been renamed to obfuscate its true nature.
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Behavioral Patterns
- File Manipulations: Monitor what files the sample drops, deletes, or creates. Unexpected behaviors can be a red flag.
- Registry Modifications: Examine registry changes. A legitimate Software update shouldn’t need to disable essential system features like Defender or Task Manager.
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Highlighted Calls: Take note of specific function calls, such as GetTickCount, which may indicate preparations to evade detection in virtual environments.
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Community Engagement
- The VT community can offer valuable insights, though navigating through the discussions can be
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