Analysis

  • max time kernel
    124s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250129-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/02/2025, 16:58

General

  • Target

    file.exe

  • Size

    4.4MB

  • MD5

    4e8a7b03ff758f5c75ce992615a14fd0

  • SHA1

    0110e12ae768872ea5c1b194dba50cbf74ec4d84

  • SHA256

    3090a37e591554d7406107df87b3dc21bda059df0bc66244e8abef6a5678af35

  • SHA512

    3fa53510e08ba1914f8cc6d34bb9c7fff544d23e365ca6e1d71d3bf022b0c3bc9bdc68cacc50a89af6744b2ba496fc0bc06e44a147f6ec8a44f446148330f3b9

  • SSDEEP

    98304:1/rljWsSqkPe1hRa3Y1D6k8LFMF9aPfckJrLH+VFuIHQgFLOAkGkzdnEVomFHKnP:1BjOqjH+XMG0uIHQgFLOyomFHKnP

Malware Config

Extracted

Path

C:\Program Files (x86)\instructions_read_me.txt

Family

blackbasta

Ransom Note
ATTENTION! Your network has been breached and all data was encrypted. Please contact us at: https://bastad5huzwkepdixedg2gekg7jk22ato24zyllp6lnjx7wdtyctgvyd.onion/ Login ID: f8ed7b93-0f13-4c24-aba9-4024b228551a *!* To access .onion websites download and install Tor Browser at: https://www.torproject.org/ (Tor Browser is not related to us) *!* To restore all your PCs and get your network working again, follow these instructions: - Any attempts to modify, decrypt or rename the files will lead to its fatal corruption. It doesn't matter, who are trying to do this, either it will be your IT guys or a recovery agency. Please follow these simple rules to avoid data corruption: - Do not modify, rename or delete files. Any attempts to modify, decrypt or rename the files will lead to its fatal corruption. - Do not hire a recovery company. They can't decrypt without the key. They also don't care about your business. They believe that they are good negotiators, but it is not. They usually fail. So speak for yourself. Waiting you in a chat.
URLs

https://bastad5huzwkepdixedg2gekg7jk22ato24zyllp6lnjx7wdtyctgvyd.onion/

Signatures

  • Black Basta

    A ransomware family targeting Windows and Linux ESXi first seen in February 2022.

  • Blackbasta family
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • 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.

  • Interacts with shadow copies 3 TTPs 1 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 5 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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1984
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4464
      • C:\Windows\system32\vssadmin.exe
        C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:5040
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3428
  • 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:2352
  • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
    "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
    1⤵
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:2652
  • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
    "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
    1⤵
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:5048

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Program Files (x86)\instructions_read_me.txt

    Filesize

    1KB

    MD5

    9d260e915b62b0f96c5a43349dea38d6

    SHA1

    b22ebce85f49166c90896c0a8b48ed5dcfcff117

    SHA256

    eba1b30081d4bd67d76e0eb2b6b466051ea604bd5aee9accd38a599de36d0508

    SHA512

    d4cb65bb577190041c10569281e8a54f396e49c917c065397be1537243d24f76c30e1f413602833ab37ff3a92956baed8d4f8fd06794f1211328f87b7993b705

  • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\AC\TokenBroker\Cache\fbaf94e759052658216786bfbabcdced1b67a5c2.tbres

    Filesize

    2KB

    MD5

    b000fd34fb841d686c27eb7bef95e5aa

    SHA1

    d3878fa19570e3bcef390760e4b501f7a73f07c9

    SHA256

    c93394d07c999e40b00dfe168c30ab669564ad9ec1e897ac904adade41df7f5d

    SHA512

    b3be9fdb4915c76e7c809a8df980a03a83cacc9a1c44a741398e3035a7e5c9fef3167766a38a6d7779294a4b866d73d5fd4cb6fc89641085b7016edd04347e8b

  • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133832483374987714.txt

    Filesize

    75KB

    MD5

    589a33e8cca36e5f5c61ddf4ca103753

    SHA1

    298c0455b151f198ed924404773fce18f4181a5a

    SHA256

    fce814f0afc4886ca0645083034fc5f74c3e78a8675f7a0dd510193e64e4e43d

    SHA512

    b8730b13cdd62694007f5b93f97fdaf4d13170054913822fedd7a0bddc4b4a33dcfc34964c302c5a60a926e5e7759960d9e4df8ebbcde5f1ff5dd084cb68acf8

  • C:\Users\Admin\AppData\Local\Packages\microsoft.windows.search_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\P56Q32J4\microsoft.windows[1].xml

    Filesize

    97B

    MD5

    75de445e72210c4fc85641c9121a64cf

    SHA1

    991e559f592b96bd50e72705811f05b453d889aa

    SHA256

    7fdafd928f21a79d34079338964c9ad86f6cd56a09f60e325d2144a1cf311299

    SHA512

    f1cc988b855fe4a64d94b0344175a14fc5207b4a6b6cb8666e9c6c0a3531e422f62940616a2029da294c80cf6aa161ae302ccee0a5e53692f6dc05afda22852a

  • memory/1984-15-0x0000000003020000-0x0000000003103000-memory.dmp

    Filesize

    908KB

  • memory/1984-13-0x0000000003020000-0x0000000003103000-memory.dmp

    Filesize

    908KB

  • memory/1984-14-0x0000000003020000-0x0000000003103000-memory.dmp

    Filesize

    908KB

  • memory/1984-10-0x0000000003020000-0x0000000003103000-memory.dmp

    Filesize

    908KB

  • memory/1984-16-0x0000000003020000-0x0000000003103000-memory.dmp

    Filesize

    908KB

  • memory/1984-558-0x0000000003020000-0x0000000003103000-memory.dmp

    Filesize

    908KB

  • memory/1984-0-0x0000000003020000-0x0000000003103000-memory.dmp

    Filesize

    908KB

  • memory/1984-9-0x0000000003020000-0x0000000003103000-memory.dmp

    Filesize

    908KB

  • memory/1984-2-0x0000000003020000-0x0000000003103000-memory.dmp

    Filesize

    908KB

  • memory/2652-742-0x000001A6FF860000-0x000001A6FF880000-memory.dmp

    Filesize

    128KB

  • memory/2652-763-0x000001A6FF820000-0x000001A6FF840000-memory.dmp

    Filesize

    128KB

  • memory/2652-780-0x000001A6FFC30000-0x000001A6FFC50000-memory.dmp

    Filesize

    128KB

  • memory/2652-737-0x000001A6FE820000-0x000001A6FE920000-memory.dmp

    Filesize

    1024KB

  • memory/5048-2765-0x0000023277150000-0x0000023277250000-memory.dmp

    Filesize

    1024KB

  • memory/5048-2770-0x00000232782C0000-0x00000232782E0000-memory.dmp

    Filesize

    128KB

  • memory/5048-2805-0x0000023278280000-0x00000232782A0000-memory.dmp

    Filesize

    128KB

  • memory/5048-2806-0x0000023278920000-0x0000023278940000-memory.dmp

    Filesize

    128KB