Nymaim

malware OpenTrojan Threat Intelligence

Loader + ransomware drop

Source Attribution

Origin
MITRE
Source
Researchers
Verified
2026-08-26T16:11:50.351Z
Confidence
high

Source: Researchers · Verified: 2026-08-26T16:11:50.351Z · Confidence: high

Security Timeline

  • discovered Nymaim first observed
  • updated Encyclopedia entry reviewed (Phase 45C)

Quick Answer

Nymaim is an old loader/ransomware family with heavy polymorphism and intermittent activity. (attributes recorded from Researchers).

Definition

Nymaim is an old loader/ransomware family with heavy polymorphism and intermittent activity.

Overview

Nymaim is an old loader/ransomware family with heavy polymorphism and intermittent activity.

Behavior

  • Polymorphic DLL
  • downtime factors

First Seen

2013-01

Target

Loader + ransomware drop

Malware Intelligence

Family: Nymaim

Techniques: T1105, T1055

Targets: Loader + ransomware drop

Behavior:
  • Polymorphic DLL
  • downtime factors

References

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  5. Sources — NVD, CISA KEV, MITRE ATT&CK, vendor advisories.
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