Analysis

  • max time kernel
    158s
  • max time network
    172s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    28-01-2022 19:42

General

  • Target

    8ee40eb0e93a94fbac47c990a0944b4d40e408bfe77a447fcc18c50dcb430347.exe

  • Size

    139KB

  • MD5

    8f78176a1aa30d302cd2997a32cfdc79

  • SHA1

    e6c7598accd21430a73f3575fe0519dbeca5af90

  • SHA256

    8ee40eb0e93a94fbac47c990a0944b4d40e408bfe77a447fcc18c50dcb430347

  • SHA512

    7a2a0733c626e771ed90d7a1b181658effce25bf1555dd1791778ba0a848fde9d769ef47378247cf5b0c3e16ef714eceae6a2d37760011d2c25c1dbe66bc1ffd

Malware Config

Extracted

Path

C:\KRGCF-DECRYPT.txt

Ransom Note
---= GANDCRAB V5.0.4 =--- ***********************UNDER NO CIRCUMSTANCES DO NOT DELETE THIS FILE, UNTIL ALL YOUR DATA IS RECOVERED*********************** *****FAILING TO DO SO, WILL RESULT IN YOUR SYSTEM CORRUPTION, IF THERE ARE DECRYPTION ERRORS***** Attention! All your files, documents, photos, databases and other important files are encrypted and have the extension: .KRGCF The only method of recovering files is to purchase an unique private key. Only we can give you this key and only we can recover your files. The server with your key is in a closed network TOR. You can get there by the following ways: ---------------------------------------------------------------------------------------- | 0. Download Tor browser - https://www.torproject.org/ | 1. Install Tor browser | 2. Open Tor Browser | 3. Open link in TOR browser: http://gandcrabmfe6mnef.onion/d2a7fe38e2552b21 | 4. Follow the instructions on this page ---------------------------------------------------------------------------------------- On our page you will see instructions on payment and get the opportunity to decrypt 1 file for free. ATTENTION! IN ORDER TO PREVENT DATA DAMAGE: * DO NOT MODIFY ENCRYPTED FILES * DO NOT CHANGE DATA BELOW ---BEGIN GANDCRAB KEY--- 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 ---END GANDCRAB KEY--- ---BEGIN PC DATA--- wfKD6iudumBkmpL8IRr4U4exEVaoOXLtwDwmOrT1y1YWvOiWMx5GYaRdvZZaTp9RtXYU7nBWsLfMTGiHhh5qBJzzs9MC7736UkGSDDniUJJG8/LFF//kmGmoAZAGLo2j5/wd2UrxMJK+iqKhTkS3ArgAxrZOOOiXrbnhbWMkLHQnbYuWlMClYZxYU6SDxpopRo5r292AV1KIZBZV4APBuUHcKSIr2MWMI0O1MKIP2IpKLE2TS5wNmoQoAHZdP6U/VvqF1shzlzbajc1AHXg7l8xnT91gCFUxMg7ADMEr7316SnTFUg/DkeItL9jgqcun8rr55+pitbEnkUvB6OLx/2Q2FOsjGtlYPlqBBibtuxGOEY0b9Scf4qq4MaaXY7JyAYzW2Q+irpQZTWgqalO6JIQJopFqwNEoBhPAnKY+DO5AAL2fiGE1g6xrLw3vxA1KxQ7wZi7pCxFN3uPLaOb91wsZM3QWRlyKajmS1hTgJn9imRHfzCz/QU5nm7IpltmwrXJbVczpPzetfEscIsBuP3NNnH9WQ2/C36ZUErLtf0jsBdBMMpGrHpcOL7+fRYUP+Ik= ---END PC DATA---
URLs

http://gandcrabmfe6mnef.onion/d2a7fe38e2552b21

Signatures

  • Gandcrab

    Gandcrab is a Trojan horse that encrypts files on a computer.

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies extensions of user files 9 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Drops startup file 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Enumerates connected drives 3 TTPs 24 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Drops file in Program Files directory 35 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies system certificate store 2 TTPs 12 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 45 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8ee40eb0e93a94fbac47c990a0944b4d40e408bfe77a447fcc18c50dcb430347.exe
    "C:\Users\Admin\AppData\Local\Temp\8ee40eb0e93a94fbac47c990a0944b4d40e408bfe77a447fcc18c50dcb430347.exe"
    1⤵
    • Modifies extensions of user files
    • Drops startup file
    • Enumerates connected drives
    • Sets desktop wallpaper using registry
    • Drops file in Program Files directory
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4032
    • C:\Windows\SysWOW64\wbem\wmic.exe
      "C:\Windows\system32\wbem\wmic.exe" shadowcopy delete
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3564
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1272

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

File Deletion

1
T1107

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

2
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

3
T1082

Collection

Data from Local System

1
T1005

Impact

Inhibit System Recovery

1
T1490

Defacement

1
T1491

Replay Monitor

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Downloads