Kaspersky Restore Utility -
Most ransomware variants use asymmetric encryption (AES + RSA). Without the private key, you cannot mathematically reverse the encryption. This tool does not try.
Most people know Kaspersky for its antivirus engine (and the geopolitical noise surrounding it). Few know about a small, standalone tool quietly sitting in their installation directory that can perform digital necromancy. kaspersky restore utility
The utility carves those fragments out of unallocated space, the pagefile, or even shadow copies, and reassembles them. Ransomware operates logically. It says: “Open File A → Encrypt contents → Write back to File A.” Most ransomware variants use asymmetric encryption (AES +
| File Type | Ransomware A (Legacy) | Ransomware B (Modern, full-overwrite) | Ransomware C (Delete+TRIM) | | :--- | :--- | :--- | :--- | | Small .txt files | 92% recovery | 0% (overwritten) | 0% | | .jpg photos | 78% recovery | 12% (partial headers) | 3% (fragments) | | .docx (ZIP structure) | 65% recovery | 0% | 0% | | .pdf | 81% recovery | 8% | 1% | Most people know Kaspersky for its antivirus engine
After testing it against three different ransomware strains (including one that overwrote files with zeros), here is everything you need to know—when it works, when it fails, and how to use it like a forensic analyst. Let’s clear up the biggest misconception immediately.
Keep a copy of restore.exe on a USB drive before you get infected. If you wait until after, downloading it onto the compromised machine might overwrite the very sectors you need to recover.