Ransomware Research

MBR-ONI Ransomware

MBR-ONI is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2017, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: ONI.

Quick facts

Ransomware Family
MBR-ONI
First Seen
June 1, 2017
Known Aliases
  • ONI

How MBR-ONI ransomware works

File modification behavior

MBR-ONI updates file modification timestamps after encryption.

File encryption patterns

MBR-ONI modifies encrypted files using specific patterns to mark them as encrypted:

Extensions added after encryption
  • .oni

Ransom note and payment demands

After encrypting files, MBR-ONI displays ransom notes demanding payment for file recovery:

file!!!README!!!.html
notes/!!!README!!!.html

Location: EveryFolder

Technical indicators

Associated executable files

The following executable files are associated with MBR-ONI ransomware:

  • oni.exe
  • oni.exe_org
  • 9b.exe

About this analysis

This MBR-ONI 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 MBR-ONI.

Last updated: April 11, 2023

Detection coverage

Elastio detects MBR-ONI inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify MBR-ONI across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a hunt against your recovery points to confirm.