Ransomware Research

0kilobypt Ransomware

0kilobypt is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2016, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
0kilobypt
First Seen
March 1, 2016

How 0kilobypt Ransomware Works

File Encryption Patterns

0kilobypt modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

..CRYPT..cr..val./\.\w{8}$/./\.\w{5}$/

Ransom Note and Payment Demands

After encrypting files, 0kilobypt displays ransom notes demanding payment for file recovery:

fileWHERE ARE YOUR FILES READ ME (ГДЕ ТВОИ ФАЙЛЫ, ПРОЧИТАЙ МЕНЯ).txt

Ransom message:

notes/WHERE ARE YOUR FILES READ ME (ГДЕ ТВОИ ФАЙЛЫ, ПРОЧИТАЙ МЕНЯ).txt
file!!!ПОМОЖЕМ_С_ФАЙЛАМИ_(rekoh4th@secmail.pro).txt
file!!!ПРОЧИТАТЬ!!!.txt

Ransom message:

notes/README.txt
fileВЕРНУТЬ ВАШИ ФАЙЛЫ.txt

Ransom message:

notes/ВЕРНУТЬ ВАШИ ФАЙЛЫ.txt
fileRECOVERY.txt

Ransom message:

notes/RECOVERY.txt
fileREADME.txt

Ransom message:

notes/README.txt
fileRECOVERY.hta

Ransom message:

notes/RECOVERY.hta.txt

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About This Analysis

This 0kilobypt 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 0kilobypt.

Last updated: October 30, 2025

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