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CryptoLocker Ransomware

malware OpenTrojan Threat Intelligence

Pioneering public ransomware

Source Attribution

Origin
MITRE
Source
FBI takedown 2014
Verified
2026-08-26T16:07:01.550Z
Confidence
high

Source: FBI takedown 2014 · Verified: 2026-08-26T16:07:01.550Z · Confidence: high

Security Timeline

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

Quick Answer

CryptoLocker was a pivotal 2013 ransomware that encrypted files and demanded Bitcoin for decryption. (attributes recorded from FBI takedown 2014).

Definition

CryptoLocker was a pivotal 2013 ransomware that encrypted files and demanded Bitcoin for decryption.

Overview

CryptoLocker was a pivotal 2013 ransomware that encrypted files and demanded Bitcoin for decryption.

Behavior

  • Gameover Zeus delivery
  • Bitcoin ransom

First Seen

2013-09

Target

Pioneering public ransomware

Malware Intelligence

Family: CryptoLocker Ransomware

Techniques: T1486

Targets: Pioneering public ransomware

Behavior:
  • Gameover Zeus delivery
  • Bitcoin ransom

Related

References

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  1. Question — what do you need to know about CryptoLocker Ransomware?
  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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