File Spider Ransomware
File Spider is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2017, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Spider.
Quick facts
How File Spider ransomware works
File encryption patterns
File Spider modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, File Spider displays ransom notes demanding payment for file recovery:
notes/HOW TO DECRYPT FILES.url
Technical indicators
Associated executable files
The following executable files are associated with File Spider ransomware:
- malicious doc ransomware (1)
- BAYER_CROPSCIENCE_OFFICE_BEOGRAD_93876.doc
- malicious doc ransomware (2)
- CUMMINS_SERBOMONTE_DOO_72225.doc
- enc.exe
- YpnZR.exe
- _enc.exe
- RnJRHo.exe
- dec.exe
About this analysis
This File Spider 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 File Spider.
Last updated: December 30, 2025
Elastio detects File Spider inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify File Spider 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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