Ransomware Research
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
- Ransomware Family
- File Spider
- First Seen
- December 1, 2017
- Known Aliases
- Spider
How File Spider Ransomware Works
Targeted Files
Executeable should be started from -> /mnt/Users/USER/AppData/Roaming/Spider/ with parameters -> spider ktn 100 https://www.hybrid-analysis.com/sample/1753cfa7bec8b6044b07823deee14d9ca366c54b42c1c9d4ff045dac2fc112d9?environmentId=100
File Encryption Patterns
File Spider modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..spiderRansom Note and Payment Demands
After encrypting files, File Spider displays ransom notes demanding payment for file recovery:
HOW TO DECRYPT FILES.urlRansom message:
notes/HOW TO DECRYPT FILES.url
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with File Spider ransomware:
malicious doc ransomware (1)BAYER_CROPSCIENCE_OFFICE_BEOGRAD_93876.docmalicious doc ransomware (2)CUMMINS_SERBOMONTE_DOO_72225.docenc.exeYpnZR.exe_enc.exeRnJRHo.exedec.exe
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About This Analysis
This File Spider ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery solutions, helping organizations defend against and recover from ransomware attacks like File Spider.
Last updated: July 30, 2025