Ransomware encrypts files or systems to block access and demand payment for decryption. Data extortion uses stolen data as leverage, often threatening to publish or sell it; it can happen without encryption. When attackers both encrypt systems and threaten to disclose stolen data, CISA calls the tactic double extortion.
What is the difference between ransomware and data extortion?
The distinction is what attackers do and what they threaten. Ransomware uses encryption to disrupt access to files or systems. Data extortion uses stolen information to pressure a victim, typically through a threat of disclosure or sale. Encryption and data theft are separate actions, so an incident may involve either one or both. These are practical descriptions of attack behavior, not a legal taxonomy. CISA’s joint guide recognizes data-theft extortion without ransomware as well as ransomware incidents involving data theft.
| Dimension | Ransomware | Data extortion | Double extortion |
|---|---|---|---|
| Core leverage | Encryption blocks access; the attacker demands ransom for decryption. | Stolen data is used as leverage, often with threats to publish or sell it. | The attacker combines encryption with a threat to disclose exfiltrated data. |
| Primary risk | Loss of availability and interruption to operations. | Loss of confidentiality, with possible privacy, reputational, and downstream harms. | Both disruption and consequences from disclosure. |
| Is encryption required? | Yes, in CISA’s description of ransomware. | No. | Yes. |
| Is data theft required? | No. Encrypted files alone do not establish that data was stolen. | Yes, for the data-theft form of extortion discussed here. | Yes. |
| Response emphasis | Containment, investigation, and clean recovery. | Containment, evidence preservation, exposure assessment, and breach response. | Coordinate recovery with the data-breach response. |
Can attackers extort you without encrypting files?
Yes. Attackers may steal data and threaten to release it without using ransomware or encrypting files. CISA’s joint guide says: “In some cases, malicious actors may exfiltrate data and threaten to release it as their sole form of extortion without employing ransomware.” A lack of encrypted files therefore does not rule out an extortion incident.
Keep claims about theft evidence-led. A threat actor’s claim that it stole data is not, by itself, confirmation that the data was exfiltrated. Investigation should establish what systems and information were accessed or taken, as far as available evidence allows.
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What does double extortion mean?
Double extortion combines two forms of pressure: attackers encrypt systems to disrupt access and threaten to disclose data they have stolen. The victim may face operational disruption even if it has backups, alongside potential exposure harms if the stolen information is released. CISA’s Play ransomware advisory, updated June 4, 2025, describes the group using this model: exfiltrating data, encrypting systems, and threatening publication if victims refuse to pay.
The advisory also reports that the FBI was aware of approximately 900 entities allegedly exploited by Play actors as of May 2025. That is an FBI awareness figure about entities allegedly exploited, not a count of confirmed ransomware victims or a general measure of how common double extortion is. The advisory describes one group’s reported behavior, not a template for every ransomware incident.
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How should an organization prepare for each type?
Prepare for disruption and data exposure
CISA recommends an incident response plan and communications plan that cover ransomware, data extortion, and breach procedures. It also recommends offline, encrypted backups of critical data and regular testing of their availability and integrity in a disaster-recovery scenario. Backups can support recovery from loss of access; they cannot make data that has already been stolen private again.
Keep backups separate and test restoration
The FBI’s Internet Crime Complaint Center advises keeping backups separate from the computers and networks being backed up, checking that backups completed, and testing that data can be restored. An encrypted external drive can be one medium for offline backups if it is disconnected when not in use and included in restore testing; buying a drive alone does not prevent extortion. CISA also discusses offline and cloud-to-cloud backup approaches.
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What should you do during an incident?
- Identify and isolate affected systems. Follow the incident response plan and contain affected systems to limit further impact.
- Establish what happened. Develop an initial understanding of events and investigate whether systems were encrypted, whether data was accessed or exfiltrated, or both.
- Preserve relevant evidence. Keep incident records and other relevant evidence for investigation and response.
- Recover from clean systems. Use clean systems and offline encrypted backups, prioritizing critical services. Test that backups are usable as part of the recovery process.
- Address possible data exposure. If a breach occurred, follow the organization’s notification plan and applicable requirements. Duties and deadlines depend on jurisdiction and incident facts.
- Report the crime. The FBI IC3 asks complainants to include details such as the ransomware variant, if known; encrypted-file extension; attacker contact details; cryptocurrency information; demand amount; and whether payment was made. FBI IC3 ransomware guidance provides its reporting advice.
Does paying a ransom guarantee recovery or confidentiality?
No. CISA says payment does not ensure files will be decrypted, the compromise will end, or stolen data will remain private. The FBI says it does not support paying a ransom and states that payment does not guarantee recovery. A payment therefore should not be treated as a substitute for containment, investigation, tested recovery, or breach response.
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