Short bio

Malware.Heuristic.(id-nr) are heuristic detection names produced by Malwarebytes 4 and Malwarebytes business products. The heuristic detections are done by using sandboxing and other emulation techniques to monitor the behavior of the scanned item. This technique was developed by Malwarebytes for signatureless detection of zero-day (0-day) threats.

The id-nr is usually a single digit.

Types of infection

Based on closer determination, items detected as Malware.Heuristic can be categorized more precisely based on their behavior. Malwarebytes uses the underlying threat categories:

  • Adware
  • Fraudtool
  • Hijack
  • Ransomware
  • Riskware
  • Rogue
  • Rootkit
  • Spyware
  • Trojan
  • Virus
  • Worm



Malwarebytes detects unknown threats as Malware.Heuristic by using sandboxing and other emulation techniques without any specific detection rules to protect users from malware that has not yet been researched and classified. This helps protect our customers against 0-day malware.

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