IFN643 Ransomware
IFN643 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick facts
How IFN643 ransomware works
File encryption patterns
IFN643 modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, IFN643 displays ransom notes demanding payment for file recovery:
notes/IFN643_Malware_Readme
Technical indicators
Associated executable files
The following executable files are associated with IFN643 ransomware:
- spoolpdf.exe
- spoolpdf.anti.exe
About this analysis
This IFN643 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 IFN643.
Last updated: December 30, 2025
Elastio detects IFN643 inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify IFN643 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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