Overview

overview

10

Static

static

3

sample.exe

windows7-x64

10

sample.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/12/2024, 16:01

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General

  • Target
    sample.exe
  • Size 280KB
  • Sample241229-tgp4vstrht
  • SHA256 994539855377a216b90c1db4f77fdd60dd89aa2296a19345cf19d9591419809e
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
discoverypersistenceransomware

Malware Config

Extracted

Path

  • C:\$Recycle.Bin\READ_ME_NOTE.txt

Ransom Note
  • !!! ALL YOUR FILES ARE ENCRYPTED!!! All your files, documents, photos, databases and other important files are encrypted. The only way to recover your files is to get a decryptor. To get the decryptor, write to us by mail or telegram, specify the ID of the encrypted files in the letter: Email: [email protected] Telegram: https://t.me/returnbackcyberfearcom Warning!!! * Do not rename files. * Do not attempt to decrypt data using third party software, as this may result in permanent data loss. * Do not contact other people, only we can help you and recover your data. Your personal decryption ID: CxLg9XcDAS0
URLs

  • https://t.me/returnbackcyberfearcom

Signatures

  • Renames multiple (179) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\sample.exe
    "C:\Users\Admin\AppData\Local\Temp\sample.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2904
    • C:\Users\Admin\AppData\Local\Temp\sample.exe
      "C:\Users\Admin\AppData\Local\Temp\sample.exe" p r i v e t
      2⤵
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      PID:4528
  • C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\READ_ME_NOTE.txt
    1⤵
    • Opens file in notepad (likely ransom note)
    PID:2596

Network

        MITRE ATT&CK Enterprise v15

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        Downloads

        READ_ME_NOTE.txt
        • Path C:\$Recycle.Bin\READ_ME_NOTE.txt
        • Size 635B
        • SHA256 5364b0c5ea458ab438bd1d9fbfc76a5f6583d913f67344314c30dc8ab3c55b4c
        • MD5 SHA1 SHA512
        Submit Download