Ransomware Research

Serpent Danish Ransomware

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

Quick facts

Ransomware Family
Serpent Danish
First Seen
February 1, 2017
Known Aliases
  • Serpent 2017

How Serpent Danish ransomware works

File modification behavior

How Serpent Danish alters file modification timestamps is not known.

File encryption patterns

Serpent Danish modifies encrypted files using specific patterns to mark them as encrypted:

Extensions added after encryption
  • .serpent
  • .serp

Ransom note and payment demands

After encrypting files, Serpent Danish displays ransom notes demanding payment for file recovery:

fileREADME_TO_RESTORE_FILES.txt
file/HOW_TO_DECRYPT_YOUR_FILES_[A-Za-z0-9]{3}.txt/
notes/HOW_TO_DECRYPT_YOUR_FILES_Hg5.txt

Technical indicators

Associated executable files

The following executable files are associated with Serpent Danish ransomware:

  • software.exe
  • iutyfghjkoiuytf.exe
  • software.bin
  • Sperment ransomware.bin
  • Sperment Ransomware.exe
  • Sperment ransomware.exe
  • puttyx86.exe
  • 286d.exe
  • 1286d.exe
  • ser.exe

About this analysis

This Serpent Danish 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 Serpent Danish.

Last updated: May 5, 2023

Detection coverage

Elastio detects Serpent Danish inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify Serpent Danish 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.