Ransomware Research

JNEC.a Ransomware

JNEC.a is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2019, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
JNEC.a
First Seen
March 1, 2019

How JNEC.a Ransomware Works

Targeted Files

https://digital.nhs.uk/cyber-alerts/2019/cc-2980 d3f74955d9a69678b0fabb4cc0e298fb0909a96ea68865871364578d99cd8025 -> ransomware payload 551541d5a9e2418b382e331382ce1e34ddbd92f11772a5d39a4aeb36f89b315e -> archive with vulnerability

File Encryption Patterns

JNEC.a modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

..Jnec

Ransom Note and Payment Demands

After encrypting files, JNEC.a displays ransom notes demanding payment for file recovery:

fileJNEC.README.TXT

Ransom message:

notes/JNEC.README.TXT

Note locations:

Desktop
message

Ransom message:

notes/note.txt

Note locations:

OnceOnCompletion

Technical Indicators

Associated Executable Files

The following executable files are associated with JNEC.a ransomware:

  • JNEC.A.exe
  • JNEC_A_ransomware
  • GoogleUpdate.exe
  • vk_4221345.rar

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About This Analysis

This JNEC.a 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 JNEC.a.

Last updated: July 30, 2025

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