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Bifrost RAT

malware OpenTrojan Threat Intelligence

Linux/Windows backdoor

Source Attribution

Origin
MITRE
Source
MITRE ATT&CK
Verified
2026-08-26T16:07:01.550Z
Confidence
high

Source: MITRE ATT&CK · Verified: 2026-08-26T16:07:01.550Z · Confidence: high

Security Timeline

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

Quick Answer

Bifrost is a long-lived RAT family with Windows and Linux variants used for covert remote control. (attributes recorded from MITRE ATT&CK).

Definition

Bifrost is a long-lived RAT family with Windows and Linux variants used for covert remote control.

Overview

Bifrost is a long-lived RAT family with Windows and Linux variants used for covert remote control.

Behavior

  • Proxy/gateway C2
  • persistent backdoor

First Seen

2004-01

Target

Linux/Windows backdoor

Malware Intelligence

Family: Bifrost RAT

Techniques: T1071, T1105

Targets: Linux/Windows backdoor

Behavior:
  • Proxy/gateway C2
  • persistent backdoor

Related

References

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  1. Question — what do you need to know about Bifrost RAT?
  2. Evidence — assertions mapped to verifiable references.
  3. Timeline — events in chronological order.
  4. Related Entities — CVE, threat actor, campaign, malware links.
  5. Sources — NVD, CISA KEV, MITRE ATT&CK, vendor advisories.
  6. Notes — your own observations and working hypotheses.

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