Analysis

  • max time kernel
    46s
  • max time network
    117s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    26-07-2021 12:58

General

  • Target

    329b3ddbf1c00b7767f0ec39b90eb9f4f8bd98ace60e2f6b6fbfb9adf25e3ef9.sample.exe

  • Size

    99KB

  • MD5

    78efe80384fa759964c9ea8bada3ac8d

  • SHA1

    6300dca046dee2d99f8429bdb9b5f3edc4d5ec1c

  • SHA256

    329b3ddbf1c00b7767f0ec39b90eb9f4f8bd98ace60e2f6b6fbfb9adf25e3ef9

  • SHA512

    faab33afd525d4dee0497096f8cd07c748d98d6b3337d0616740495e6dde2d3b6a4bfb4aadfc2ac032ea5d6e065fc17b0addb4a1fe01878868d39d5d7c282dbc

Malware Config

Extracted

Path

C:\HHZLMFN-DECRYPT.txt

Family

gandcrab

Ransom Note
---= GANDCRAB V5.2 =--- ***********************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: .HHZLMFN 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/8b5050ff5179efd | 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--- 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 ---END PC DATA---
URLs

http://gandcrabmfe6mnef.onion/8b5050ff5179efd

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 6 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 24 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.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\329b3ddbf1c00b7767f0ec39b90eb9f4f8bd98ace60e2f6b6fbfb9adf25e3ef9.sample.exe
    "C:\Users\Admin\AppData\Local\Temp\329b3ddbf1c00b7767f0ec39b90eb9f4f8bd98ace60e2f6b6fbfb9adf25e3ef9.sample.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
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:348
    • C:\Windows\SysWOW64\wbem\wmic.exe
      "C:\Windows\system32\wbem\wmic.exe" shadowcopy delete
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1960
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:200

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

File Deletion

1
T1107

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

Defacement

1
T1491

Replay Monitor

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Downloads

  • memory/1960-114-0x0000000000000000-mapping.dmp