Overview

overview

10

Static

static

3

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    74s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/02/2025, 16:58

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General

  • Target

    file.exe

  • Size

    949KB

  • MD5

    a292fee8d8db83711e72c06d6f82562d

  • SHA1

    82f88c1af036181ee4e92a2f9338c152d1ff0c58

  • SHA256

    df5b004be71717362e6b1ad22072f9ee4113b95b5d78c496a90857977a9fb415

  • SHA512

    50a63500809fdc218b3d1cdc2cf402261e1c2d63c6f66088c857b03f6c7e7165835f9959b9d8200541e6f69dd149bdc0f7c0a0801caaeccfe0a9807e7f8289f1

  • SSDEEP

    12288:RcOlvT7Zom3rITxaVDrd5vUa69Ghj91nlQocyW7/P6E4kKjqnes9PBVW/g:RDJJDbcJ90jtH0bP6ELVne2

Score
10/10
blackbastadefense_evasiondiscoveryexecutionimpactransomware

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: 7ab0444a-f73c-4ab0-b3a9-4c2ead84ecf1 *!* 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.

    ransomwareblackbasta
  • Blackbasta family
    blackbasta
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution
  • Renames multiple (3841) files with added filename extension

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

    ransomware
  • 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.

    discovery
  • Interacts with shadow copies 3 TTPs 1 IoCs

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

    ransomware
  • Modifies registry class 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 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.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2940
    • 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:1880
      • C:\Windows\system32\vssadmin.exe
        C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:1468
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4776

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    1KB

    MD5

    93980259bab001fb44d7005af3daa3d4

    SHA1

    b617ca61abef3314a62b1c0f0afcbb64229a74da

    SHA256

    05a80265a3d9212592fbc9415b0a88b6e202fa258c1fde881c70f6f03b8cb817

    SHA512

    717d917f87b9b05c5582196c9ab9d2bc9f3f1ef033a1499e83ca0f72274af29067fe665ac38c4faeadb401c5cd179df46f9d51cbc7681ddd92d299d2f2d0ce84

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  • memory/2940-0-0x0000000000FA0000-0x0000000001090000-memory.dmp

    Filesize

    960KB

    Download

  • memory/2940-1-0x00000000036B0000-0x00000000038AD000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/2940-2-0x00000000038B0000-0x0000000003994000-memory.dmp

    Filesize

    912KB

    Download

  • memory/2940-4-0x00000000038B0000-0x0000000003994000-memory.dmp

    Filesize

    912KB

    Download

  • memory/2940-1610-0x00000000036B0000-0x00000000038AD000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/2940-1807-0x00000000038B0000-0x0000000003994000-memory.dmp

    Filesize

    912KB

    Download