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Home/ATT&CK/Software/S1178
MITRE ATT&CK Malware

ShrinkLocker (S1178)

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[ShrinkLocker](https://attack.mitre.org/software/S1178) is a VBS-based malicious script that leverages the legitimate Bitlocker application to encrypt files on victim systems for ransom. [ShrinkLocker](https://attack.mitre.org/software/S1178) functions by using Bitlocker to encrypt files, then renames impacted drives to the adversary’s contact email address to facilitate communication for the ransom payment.(Citation: Kaspersky ShrinkLocker 2024)(Citation: Splunk ShrinkLocker 2024)

Platforms: Windows

▪Techniques implemented (21)

T1124System Time DiscoveryT1491.001Internal DefacementT1082System Information DiscoveryT1059.005Visual BasicT1059.001PowerShellT1112Modify RegistryT1685.005Clear Windows Event LogsT1047Windows Management InstrumentationT1102Web ServiceT1486Data Encrypted for ImpactT1561.002Disk Structure WipeT1041Exfiltration Over C2 ChannelT1529System Shutdown/RebootT1685Disable or Modify ToolsT1016System Network Configuration DiscoveryT1686Disable or Modify System FirewallT1480Execution GuardrailsT1070.004File DeletionT1485Data DestructionT1057Process DiscoveryT1071.001Web Protocols
S1178on MITRE ATT&CK →

MITRE ATT&CK® is a registered trademark of The MITRE Corporation. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.