Analysis

  • max time kernel
    151s
  • max time network
    158s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    26-07-2021 12:58

General

  • Target

    1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe

  • Size

    121KB

  • MD5

    da301085de77edb94e279c81bcbeb65e

  • SHA1

    d35f76c16b7665bf7e3f412250ebc4f38670697f

  • SHA256

    1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157

  • SHA512

    00526408f5d2557080d00ae31d3448bb54c367ab3f23aaf830cfbeca9261a30292e0f95899ebe529e3a2712e5b2333765daa73a3f51817b185cdace6b0a1af3e

Malware Config

Extracted

Path

C:\KRAB-DECRYPT.txt

Ransom Note
---= GANDCRAB V4 =--- Attention! All your files, documents, photos, databases and other important files are encrypted and have the extension: .KRAB 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/d5cbddfa99bd0cb4 | 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--- wfKD6iudumBkmpL8IRr4U4exEVaoOXLtwDwmOrT1y1YWvOiWMx5GYaRdvZZFTp1Rs3YO7npWs7fRTG+Hhh5qBJzzs9MC7736UkGSDDniUJJG8/LFF//kmGmoAZAGLo2j5/wd2UrxMJK+iqKhTkS3ArgAxrZOOOiXrbnhbWMkLHQnbYuWlMClYZxYU6SDxpopRo5r292AV1KIZBZV4APBuUHcKSIr2MWMI0O1MKIP2IpKLE2TS5wNmoQoAHZdP6U/VvqF1shzlzbajc1AHXg7l8xnT91gCFUxMg7ADMEr7316SnTFUg/DkeItL9jgqcun9br7579it7EmkR7BseKt/282Q+tyGttYP1rRBiPtuxGOEY0b9Scf4qq4MaaXY7JyAYzW2Q+irpQZTWgqalO4JIUJo5FhwNYoDBPInKY+DO5AAL2fiGE1g65rIQ3sxAlKxQ72Zi7pDxFF3uPLaOb91wsZMHQWRlGKajmS1hTgJn9imRHfzCz/QUpnmLItltmwrXJbVczpPzetfEscIsBuP3JNnH9XQ2/C2qZUErLtf0jsBdBMMpGrHpcOL7+fRYUP+Ik= ---END PC DATA---
URLs

http://gandcrabmfe6mnef.onion/d5cbddfa99bd0cb4

Signatures

  • Gandcrab

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

  • suricata: ET MALWARE [eSentire] Win32/GandCrab v4/5 Ransomware CnC Activity
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies extensions of user files 7 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.

  • Drops file in Program Files directory 15 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 2 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\1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe
    "C:\Users\Admin\AppData\Local\Temp\1164e122800fda5ad79d422710877fd9767d44a15e69f3c28e9563ff3e752157.sample.exe"
    1⤵
    • Modifies extensions of user files
    • Drops startup file
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4016
    • C:\Windows\SysWOW64\wbem\wmic.exe
      "C:\Windows\system32\wbem\wmic.exe" shadowcopy delete
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:188
  • 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

Install Root Certificate

1
T1130

Modify Registry

1
T1112

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

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/188-114-0x0000000000000000-mapping.dmp