Analysis

  • max time kernel
    135s
  • max time network
    104s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-05-2024 09:11

General

  • Target

    21611a8c76169a345715cf0d6dbf9e495e71ad235ed11bca5ee38ec281f75fc2.exe

  • Size

    241KB

  • MD5

    5bb957a511d230c271fae129f48f1fdf

  • SHA1

    a72f01cf027c7e385bbfc2488c91db14dadc9fac

  • SHA256

    21611a8c76169a345715cf0d6dbf9e495e71ad235ed11bca5ee38ec281f75fc2

  • SHA512

    5f815534114d0099cd28a5f732d0c6fca59ce535e1b55a42b99d22ca9ebcc921d9430bed9a36e723035326716d8b6f8872f748ed075305a1d4b1933eec92ee23

  • SSDEEP

    6144:fyGt4iW5Mpj4tZx80FYuiHAZ2CLR+D7XnrlAPgT7:f94o4XRFYsZbt+D7nhj

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Adobe\Acrobat\DC\Cache\How To Restore Your Files.txt

Ransom Note
----------- [ Hello, Schauer Agrotronic ] -------------> ****BY BABUK LOCKER**** What happend? ---------------------------------------------- Your computers and servers are encrypted, backups are deleted from your network and copied. We use strong encryption algorithms, so you cannot decrypt your data. But you can restore everything by purchasing a special program from us - a universal decoder. This program will restore your entire network. Follow our instructions below and you will recover all your data. If you continue to ignore this for a long time, we will start reporting the hack to mainstream media and posting your data to the dark web. What guarantees? ---------------------------------------------- We value our reputation. If we do not do our work and liabilities, nobody will pay us. This is not in our interests. All our decryption software is perfectly tested and will decrypt your data. We will also provide support in case of problems. We guarantee to decrypt one file for free. Go to the site and contact us. What information compromised? ---------------------------------------------- We copied more than 50 gb from your internal network, here are some proofs, for additional confirmations, please chat with us In cases of ignoring us, the information will be released to the public. How to contact us? ---------------------------------------------- Using TOR Browser ( https://www.torproject.org/download/ ): http://babukq4e2p4wu4iq.onion/login.php?id=p9gFgBg5TsdcO3mV9mf2RJlJoI0iy1 !!! DANGER !!! DO NOT MODIFY or try to RECOVER any files yourself. We WILL NOT be able to RESTORE them. !!! DANGER !!
URLs

http://babukq4e2p4wu4iq.onion/login.php?id=p9gFgBg5TsdcO3mV9mf2RJlJoI0iy1

Signatures

  • Babuk Locker

    RaaS first seen in 2021 initially called Vasa Locker.

  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (1536) 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 1 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.

  • Enumerates physical storage devices 1 TTPs

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

  • Interacts with shadow copies 2 TTPs 2 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 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\21611a8c76169a345715cf0d6dbf9e495e71ad235ed11bca5ee38ec281f75fc2.exe
    "C:\Users\Admin\AppData\Local\Temp\21611a8c76169a345715cf0d6dbf9e495e71ad235ed11bca5ee38ec281f75fc2.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Enumerates connected drives
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4728
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2556
      • C:\Windows\system32\vssadmin.exe
        vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:4276
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1712
      • C:\Windows\system32\vssadmin.exe
        vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:2972
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2420
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
    1⤵
      PID:2364
    • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
      "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:1924

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Adobe\Acrobat\DC\Cache\How To Restore Your Files.txt

      Filesize

      1KB

      MD5

      5abdd19cafcd3e72f92826392669abbf

      SHA1

      4d1b82cb3ea2d38e9a64b9e554ba37076a534836

      SHA256

      2a4bb91546305a2029efcf3c4bd6977e580d3d9824186cafec66199407f6e507

      SHA512

      fb58a7cc5ef990de16f2255c1c5c05066593dc58af3782fc8a2dfd267f73d4437dd8b65f7614d7e94f5fc2475ee058cfb2bbea13f1df835a10e5855d758f7638

    • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\StartUnifiedTileModelCache.dat

      Filesize

      13KB

      MD5

      a2045103f8d28ea48ccb1dc0b0283030

      SHA1

      3dc7993c3baf8381a88dfdb2c38cbcee44ed3745

      SHA256

      d185057d73a152752b7ea9cca2099cd4164442e0a2f6953825ee753e27a1d1db

      SHA512

      b4ce93c44514f553aba46ff49a4b54c3916b5fe7bd4c627860d53961e188c19326c20c06f9dc1b9f20c5105e8bfb45432f89d0a32cd6f9df2f428a84ac6bb1a6

    • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\StartUnifiedTileModelCache.dat

      Filesize

      13KB

      MD5

      d7b7ef15420b157bf2aa6b75a4f020ef

      SHA1

      18085eeff64a9f9141bf0006f05f48b62bf1a508

      SHA256

      a4bc99dd08b5fded7a044e72265aa127404c5a0e766a67195f7bf948b48e7ef1

      SHA512

      09e7dc65763b513a436fe54f4471ae6b11cf70d492cacbde170b2bd060e7389f28632c8872b2608583a379151f16369b69670a9100d83f8e43b90f9a43f3f9ac

    • memory/4728-6-0x0000000000400000-0x0000000000428000-memory.dmp

      Filesize

      160KB

    • memory/4728-4-0x0000000000400000-0x0000000000428000-memory.dmp

      Filesize

      160KB

    • memory/4728-5-0x0000000000610000-0x0000000000611000-memory.dmp

      Filesize

      4KB

    • memory/4728-0-0x0000000000400000-0x0000000000428000-memory.dmp

      Filesize

      160KB

    • memory/4728-3-0x0000000000401000-0x000000000040A000-memory.dmp

      Filesize

      36KB

    • memory/4728-2-0x00000000005C0000-0x00000000005FC000-memory.dmp

      Filesize

      240KB

    • memory/4728-1225-0x0000000000400000-0x0000000000428000-memory.dmp

      Filesize

      160KB

    • memory/4728-1-0x0000000000400000-0x0000000000428000-memory.dmp

      Filesize

      160KB

    • memory/4728-1239-0x0000000000400000-0x0000000000428000-memory.dmp

      Filesize

      160KB

    • memory/4728-1241-0x0000000000401000-0x000000000040A000-memory.dmp

      Filesize

      36KB

    • memory/4728-1240-0x00000000005C0000-0x00000000005FC000-memory.dmp

      Filesize

      240KB