Overview

overview

10

Static

static

1acaa7aed3...le.exe

windows7_x64

10

1acaa7aed3...le.exe

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    139s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    26-07-2021 12:57

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General

  • Target

    1acaa7aed372080632dd0958c63c0a9ad56f8b4dbdc3c265801321018766b29f.sample.exe

  • Size

    731KB

  • MD5

    3d9a9103b13744b626e67f5dab6618e7

  • SHA1

    9ad16fb6810dd136985c8a78688b81e275ddf979

  • SHA256

    1acaa7aed372080632dd0958c63c0a9ad56f8b4dbdc3c265801321018766b29f

  • SHA512

    b76543636c4b25393e3a896fe9bf48d26dc6d6da72e417a00a63692e54e03d766c2e4e43f9c591b0cd62b7022e76be57ddbf14924e837e41932baa22b5eb9c34

Score
10/10
ctblockerransomware

Malware Config

Extracted

Path

C:\Users\Admin\Documents\!Decrypt-All-Files-ywrfvle.txt

Ransom Note
Your documents, photos, databases and other important files have been encrypted with strongest encryption and unique key, generated for this computer. Private decryption key is stored on a secret Internet server and nobody can decrypt your files until you pay and obtain the private key. If you see the main locker window, follow the instructions on the locker. Overwise, it's seems that you or your antivirus deleted the locker program. Now you have the last chance to decrypt your files. Open http://jssestaew3e7ao3q.onion.cab or http://jssestaew3e7ao3q.tor2web.org in your browser. They are public gates to the secret server. If you have problems with gates, use direct connection: 1. Download Tor Browser from http://torproject.org 2. In the Tor Browser open the http://jssestaew3e7ao3q.onion/ Note that this server is available via Tor Browser only. Retry in 1 hour if site is not reachable. Copy and paste the following public key in the input form on server. Avoid missprints. 2VULOOJ-6IFGMPY-OWH5KS5-ERDO3AU-XXVFM6W-I4UJRAS-355AZD7-2VGIKEG A72Y7BP-P2EKWTU-72XWYTI-YVIO6LK-ZYB2UEM-MOS2GJ4-6S4XDAH-6FULZ3U SKIIUFP-KI7DUM5-QJZ5E5I-32PNAZC-2TLSHUC-PBSSKRL-7CULS6V-H3EMFRM Follow the instructions on the server.
URLs

http://jssestaew3e7ao3q.onion.cab

http://jssestaew3e7ao3q.tor2web.org

http://jssestaew3e7ao3q.onion/

Extracted

Path

C:\ProgramData\siyrcpf.html

Ransom Note
Your documents, photos, databases and other important files have been encrypted with strongest encryption and unique key, generated for this computer. Private decryption key is stored on a secret Internet server and nobody can decrypt your files until you pay and obtain the private key. If you see the main locker window, follow the instructions on the locker. Overwise, it's seems that you or your antivirus deleted the locker program. Now you have the last chance to decrypt your files. Open http://jssestaew3e7ao3q.onion.cab or http://jssestaew3e7ao3q.tor2web.org in your browser. They are public gates to the secret server. If you have problems with gates, use direct connection: 1. Download Tor Browser from http://torproject.org. 2. In the Tor Browser open the http://jssestaew3e7ao3q.onion Note that this server is available via Tor Browser only. Retry in 1 hour if site is not reachable. Copy and paste the following public key in the input form on server. Avoid missprints. Follow the instructions on the server. The list of your encrypted files: Path File
URLs

http://jssestaew3e7ao3q.onion.cab

http://jssestaew3e7ao3q.tor2web.org

http://jssestaew3e7ao3q.onion

Signatures

  • CTB-Locker

    Ransomware family which uses Tor to hide its C2 communications.

    ransomwarectblocker
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Executes dropped EXE 4 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops desktop.ini file(s) 1 IoCs
  • Drops file in System32 directory 6 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
    ransomware
  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
    adwarespyware
  • Modifies data under HKEY_USERS 21 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k dcomlaunch -s PlugPlay
    1⤵
    • Drops desktop.ini file(s)
    • Modifies data under HKEY_USERS
    PID:728
  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Sets desktop wallpaper using registry
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    PID:3016
    • C:\Users\Admin\AppData\Local\Temp\1acaa7aed372080632dd0958c63c0a9ad56f8b4dbdc3c265801321018766b29f.sample.exe
      "C:\Users\Admin\AppData\Local\Temp\1acaa7aed372080632dd0958c63c0a9ad56f8b4dbdc3c265801321018766b29f.sample.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3128
      • C:\Users\Admin\AppData\Local\Temp\1acaa7aed372080632dd0958c63c0a9ad56f8b4dbdc3c265801321018766b29f.sample.exe
        "C:\Users\Admin\AppData\Local\Temp\1acaa7aed372080632dd0958c63c0a9ad56f8b4dbdc3c265801321018766b29f.sample.exe"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:2784
  • C:\Users\Admin\AppData\Local\Temp\gvpesyf.exe
    C:\Users\Admin\AppData\Local\Temp\gvpesyf.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3992
    • C:\Users\Admin\AppData\Local\Temp\gvpesyf.exe
      "C:\Users\Admin\AppData\Local\Temp\gvpesyf.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1996
      • C:\Windows\SysWOW64\vssadmin.exe
        vssadmin delete shadows all
        3⤵
        • Interacts with shadow copies
        PID:2860
      • C:\Users\Admin\AppData\Local\Temp\gvpesyf.exe
        "C:\Users\Admin\AppData\Local\Temp\gvpesyf.exe" -u
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1032
        • C:\Users\Admin\AppData\Local\Temp\gvpesyf.exe
          "C:\Users\Admin\AppData\Local\Temp\gvpesyf.exe"
          4⤵
          • Executes dropped EXE
          • Checks computer location settings
          • Drops file in System32 directory
          • Modifies Internet Explorer settings
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SendNotifyMessage
          • Suspicious use of SetWindowsHookEx
          PID:1520

Network

MITRE ATT&CK Enterprise v6

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Downloads

  • memory/728-130-0x000000000FA10000-0x000000000FA87000-memory.dmp

    Filesize

    476KB

    Download

  • memory/1520-147-0x0000000000A80000-0x0000000000CCB000-memory.dmp

    Filesize

    2.3MB

    Download

  • memory/1996-129-0x0000000000980000-0x0000000000BCB000-memory.dmp

    Filesize

    2.3MB

    Download

  • memory/1996-128-0x0000000000760000-0x000000000097A000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2784-116-0x0000000000400000-0x00000000004A5000-memory.dmp

    Filesize

    660KB

    Download

  • memory/2784-120-0x0000000000910000-0x0000000000B5B000-memory.dmp

    Filesize

    2.3MB

    Download

  • memory/2784-119-0x0000000000400000-0x00000000004A4400-memory.dmp

    Filesize

    657KB

    Download