Understanding High VirusTotal Detection Scores: When to Trust Your Security Software
A VirusTotal detection score of 41/68 indicates that a significant number of security engines have flagged a specific file as potentially malicious. While a high score often signals a legitimate threat, cybersecurity professionals caution that “false positives”—where benign software is incorrectly identified as harmful—do occur, particularly with heuristic-based scanning. Users should never execute a file with such a high detection rate without performing deep analysis or sandbox testing.
Why Does a File Get a High VirusTotal Score?
VirusTotal aggregates results from over 70 different antivirus scanners and domain blacklisting services. According to VirusTotal’s official documentation, each engine uses its own proprietary algorithms and signature databases to analyze files. A high score of 41/68 means that 41 independent security vendors have matched the file against their known malware definitions or flagged it based on suspicious behavioral patterns, such as attempts to modify system registries or initiate unauthorized network connections.
What Is a False Positive?
A false positive occurs when security software incorrectly labels a safe file as malicious. This happens frequently with software that uses “obfuscation” or “packing” techniques—methods developers use to protect intellectual property or compress files—which can look identical to the methods malware authors use to hide malicious code from detection. According to the Cybersecurity and Infrastructure Security Agency (CISA), heuristic engines are designed to be overly cautious, prioritizing system safety by flagging any code that behaves in an unusual manner, even if it is not inherently harmful.
How to Verify a Suspicious File
If you encounter a file with a high detection count, relying solely on the aggregate score is insufficient. Experts recommend the following verification steps:
- Check the Community Tab: On VirusTotal, the “Community” tab often contains comments from security researchers who may have already analyzed the file and determined if it is a known false positive.
- Examine the “Details” Section: Look for the file’s digital signature. Legitimate software from reputable vendors like Microsoft or Adobe will be digitally signed by a verified certificate authority.
- Use a Sandbox: Upload the file to a sandbox environment, such as Hybrid Analysis or ANY.RUN. These tools execute the file in a secure, isolated virtual machine to record exactly what the file does upon launch.
Comparing Detection Rates: What the Numbers Mean
Security analysts often categorize detection scores to determine the level of risk:
| Detection Score | Likely Classification | Recommended Action |
|---|---|---|
| 1-3/68 | Potential False Positive | Investigate source; use caution. |
| 4-15/68 | Suspicious / Low-Reputation | Do not run; perform sandbox analysis. |
| 16+/68 | High-Confidence Malware | Delete immediately; do not execute. |
Next Steps for System Safety
If you have already executed a file that triggered a high detection score, the Federal Trade Commission (FTC) recommends disconnecting the affected device from the internet immediately to prevent potential data exfiltration or command-and-control communication. Perform a full system scan using a reputable, updated antivirus solution and consider reviewing your recent network activity logs for unauthorized connections. If the file originated from a download, report the source to the website administrator or the platform host to prevent further distribution.