KISA LooCipher Ransomware Decryption Tool review
A focused, free Windows decryptor for supported LooCipher files, with recovery run through CMD.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
KISA LooCipher Ransomware Decryption Tool is a free downloadable utility from the Korea Internet & Security Agency for people trying to recover files encrypted by LooCipher ransomware. It is a narrowly scoped recovery option rather than a general-purpose ransomware tool: its stated target is LooCipher, and its manual describes a Windows executable workflow. That makes it relevant when the affected files match this strain, but not a fit for incidents involving other ransomware.
The recovery process is specific and file-led. KISA's manual says to remove the malicious code before recovery, then drag an infected file onto LooCipher_decryptor.exe. The listed input extensions are JPEG, JPG, PDF, DOCX, PPTX, XLSX and PNG. The tool analyzes a file to recover a decryption key, saves that key in key.txt, and uses it to restore files; KISA recommends backing up encrypted files first. This process will suit users comfortable following a manual and handling files through a Windows executable, but it is not described as a broad scan or automated incident response workflow.
KISA states the tool is provided free of charge, so there are no paid tiers to weigh against added capabilities. The trade-off is its strict strain focus and command-line component: decryption code runs in CMD, which may be less approachable than a guided graphical process. Choose it when LooCipher is the confirmed problem and the listed file types are relevant. Look for a different recovery route if the ransomware strain is unknown or not LooCipher, or if the affected platform and process do not match the manual's Windows executable workflow.
KISA LooCipher Ransomware Decryption Tool pros and cons
- Where it wins
- Free to download and use, according to KISA.
- Accepts JPEG, JPG, PDF, DOCX, PPTX, XLSX and PNG files.
- Analyzes an input file, saves a recovered key and decrypts files.
- Where it doesn't
- Works only with LooCipher-encrypted files.
- Requires removing the malicious code before recovery.
- Decryption runs through CMD rather than a graphical workflow.
KISA LooCipher Ransomware Decryption Tool fact sheet, pricing and score →
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