Nefilim Ransomware
Nefilim is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2020, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Nefilim, Nefilim Doxware, Nephilim, Offwhite, Sigareta, Telegram, Nef1lim, Mefilin, Trapget, Merin, Fusion, Infection, Milihpen, Derzko, Gangbang, Kiano, Mansory.
Quick facts
How Nefilim ransomware works
File encryption patterns
Nefilim modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, Nefilim displays ransom notes demanding payment for file recovery:
notes/NEFILIM-DECRYPT.txt
notes/NEPHILIM-DECRYPT.txt
notes/OFFWHITE-MANUAL.txt
notes/SIGARETA-RESTORE.txt
notes/TELEGRAM-RECOVER.txt
notes/NEF1LIM-DECRYPT.txt
notes/TRAPGET-INSTRUCTION.txt
notes/MERIN-DECRYPTING.txt
notes/FUSION-README.txt
notes/MILIHPEN-INSTRUCT.txt
Technical indicators
Associated executable files
The following executable files are associated with Nefilim ransomware:
- 2.exe
- 1.exe
- nelifis.exe
- kinodomino.exe
- JISFMU5GNZSHLnG.exe
- weeli.exe
- FB_21B3.tmp.exe
- sync.bad
- winnit.bin
- red.eze
- spt.exe
- tel.exe
- alt.exe
- happynewyear.exe
- aes.exe
- scc-2.exe
- mma.exe
- spt(1).bin
- xxx.exe
- sync.bad.exe
- look (uploaded by Matt Browning (via weblink) Sep 22 2020 11-03-47 UTC).exe
About this analysis
This Nefilim ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like Nefilim.
Last updated: December 30, 2025
Elastio detects Nefilim inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify Nefilim across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a scan against your recovery points to confirm.
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