Analysis

  • max time kernel
    141s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-05-2024 18:06

General

  • Target

    72cec3ab7ff8520f7f3b230d8160fdaa_JaffaCakes118.exe

  • Size

    225KB

  • MD5

    72cec3ab7ff8520f7f3b230d8160fdaa

  • SHA1

    74797eee9390b9918b06faba0f08d6c3c7ee2160

  • SHA256

    29eee4f8b088ec1cdac03a04ca834479fce9a0fdf696224c6f19d573f4e2a703

  • SHA512

    f8e742b08af2c502233e187ca1b99fff6a310beb97967f2f8e4c7065e35e5fdcd9293a1308f3eb76a733ee576e015decd1e5ba3e18b6c5b69a48504089be13c2

  • SSDEEP

    3072:ufLnfk1mn7UVGhRXR9cEF3KGx/CgO9PcsibcbQLOEpTR5w1BNH50Idt:ufL8c4VQcEwGxagiPSbIyPKQIb

Malware Config

Extracted

Path

C:\$Recycle.Bin\YSFAJ-DECRYPT.txt

Ransom Note
---= GANDCRAB V5.0.2 =--- ***********************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 WILL BE DECRYPTION ERRORS***** Attention! All your files, documents, photos, databases and other important files are encrypted and have the extension: .YSFAJ 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/a30dd1d69b6ff402 | 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/a30dd1d69b6ff402

Signatures

  • Gandcrab

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

  • 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.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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 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 31 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 7 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 45 IoCs
  • Suspicious use of WriteProcessMemory 3 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\72cec3ab7ff8520f7f3b230d8160fdaa_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\72cec3ab7ff8520f7f3b230d8160fdaa_JaffaCakes118.exe"
    1⤵
    • Checks computer location settings
    • 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:2220
    • C:\Windows\SysWOW64\wbem\wmic.exe
      "C:\Windows\system32\wbem\wmic.exe" shadowcopy delete
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:5068
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4940

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\$Recycle.Bin\YSFAJ-DECRYPT.txt

    Filesize

    8KB

    MD5

    fbb80b7c71003cd6839bb12f8af3b66d

    SHA1

    ede7f8064b4f673f97d29f8e763efc50a7fe60e2

    SHA256

    2c25d486ffff2faf668c808a5deb73ef8880b582647f2e93f1eb9c953eac2429

    SHA512

    179c6694b53b656a04d7d98d7930dc4235af3c39403cde8a7a8367d9689316fe1daf55e33d9c48ceb2c70f88a6360aa55bdb1a7e16564f01a7f28b975c759db8

  • memory/2220-2-0x0000000000400000-0x0000000000428000-memory.dmp

    Filesize

    160KB

  • memory/2220-1-0x0000000000730000-0x0000000000830000-memory.dmp

    Filesize

    1024KB

  • memory/2220-436-0x0000000000400000-0x000000000043D000-memory.dmp

    Filesize

    244KB

  • memory/2220-456-0x0000000000400000-0x000000000043D000-memory.dmp

    Filesize

    244KB

  • memory/2220-457-0x0000000000730000-0x0000000000830000-memory.dmp

    Filesize

    1024KB

  • memory/2220-458-0x0000000000400000-0x0000000000428000-memory.dmp

    Filesize

    160KB