Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    30-11-2024 01:00

General

  • Target

    test.exe

  • Size

    297KB

  • MD5

    314558f9a6da39ffd12cba6c1064b3b8

  • SHA1

    2c416cbfa8aeee687534b7c0888d411c0a837c59

  • SHA256

    64a45b42204cf4412dc2891368a4b72670642a008b13f3d99f6d3d42de95a842

  • SHA512

    41fdd3cff2e4620c0dfc7adca6a985ba5af69c1e72be409ae8d206534e32e1d3d34358f3f90521f57969c3cdf391442f4dfeba2a174b3abcbe72257d36706947

  • SSDEEP

    6144:ZUL4NWKzjkaphkIOe2q4EVSh/Bw/mhMgAB:ZUsNWK3bT4EneIB

Malware Config

Extracted

Path

C:\$Recycle.Bin\S-1-5-21-3551809350-4263495960-1443967649-1000\HNENJB-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: .HNENJB 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/47ffd42a7a0803ce | 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/47ffd42a7a0803ce

Signatures

  • Gandcrab

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

  • Gandcrab family
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (278) files with added filename extension

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

  • Credentials from Password Stores: Windows Credential Manager 1 TTPs

    Suspicious access to Credentials History.

  • Drops startup file 2 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Enumerates connected drives 3 TTPs 23 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 22 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.

  • 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 43 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\test.exe
    "C:\Users\Admin\AppData\Local\Temp\test.exe"
    1⤵
    • Drops startup file
    • Enumerates connected drives
    • Sets desktop wallpaper using registry
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1724
    • C:\Windows\SysWOW64\wbem\wmic.exe
      "C:\Windows\system32\wbem\wmic.exe" shadowcopy delete
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:1584
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1836

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\$Recycle.Bin\S-1-5-21-3551809350-4263495960-1443967649-1000\HNENJB-DECRYPT.txt

    Filesize

    8KB

    MD5

    f0a825b874c9d057c1b72a9286377647

    SHA1

    dfefadb95453adf66234e5375708bb70189ebfd7

    SHA256

    792165f928cf9c7f723227b58a1310b892d83301b8585d6f1c3cc04e85fdf1ef

    SHA512

    53a5dab395b7746ebbe0e9f0e18c3802b993498e35e2b6640ceb20b42a38758dc172151b3393d5b425a693fc7e5f6c6d90264ba62e346e06beb752a094834016

  • memory/1724-1-0x0000000000610000-0x0000000000710000-memory.dmp

    Filesize

    1024KB

  • memory/1724-2-0x0000000000400000-0x0000000000428000-memory.dmp

    Filesize

    160KB

  • memory/1724-727-0x0000000000610000-0x0000000000710000-memory.dmp

    Filesize

    1024KB

  • memory/1724-728-0x0000000000400000-0x000000000044F000-memory.dmp

    Filesize

    316KB

  • memory/1724-729-0x0000000000400000-0x0000000000428000-memory.dmp

    Filesize

    160KB