Overview

overview

10

Static

static

3

winprofile

windows7-x64

9

winprofile

windows10-1703-x64

10

Analysis

  • max time kernel
    167s
  • max time network
    135s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    14-05-2024 04:59

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General

  • Target

    3090a37e591554d7406107df87b3dc21bda059df0bc66244e8abef6a5678af35.exe

  • Size

    4.4MB

  • MD5

    4e8a7b03ff758f5c75ce992615a14fd0

  • SHA1

    0110e12ae768872ea5c1b194dba50cbf74ec4d84

  • SHA256

    3090a37e591554d7406107df87b3dc21bda059df0bc66244e8abef6a5678af35

  • SHA512

    3fa53510e08ba1914f8cc6d34bb9c7fff544d23e365ca6e1d71d3bf022b0c3bc9bdc68cacc50a89af6744b2ba496fc0bc06e44a147f6ec8a44f446148330f3b9

  • SSDEEP

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

Score
10/10
blackbastadefense_evasionexecutionimpactpersistenceransomwarespywarestealer

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.

    ransomwareblackbasta
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Drops desktop.ini file(s) 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

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

    ransomware
  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
    adwarespyware
  • Modifies registry class 21 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 11 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\3090a37e591554d7406107df87b3dc21bda059df0bc66244e8abef6a5678af35.exe
    "C:\Users\Admin\AppData\Local\Temp\3090a37e591554d7406107df87b3dc21bda059df0bc66244e8abef6a5678af35.exe"
    1⤵
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Drops file in Program Files directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:752
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4416
      • C:\Windows\System32\vssadmin.exe
        C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:380
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c start /MAX notepad.exe c:\instructions_read_me.txt
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1200
      • C:\Windows\SysWOW64\notepad.exe
        notepad.exe c:\instructions_read_me.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:4616
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2724
  • C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe
    "C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe" -ServerName:CortanaUI.AppXa50dqqa5gqv4a428c9y1jjw7m3btvepj.mca
    1⤵
    • Drops file in Windows directory
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:3280

Network

MITRE ATT&CK Enterprise v15

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Downloads

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

    1KB

    MD5

    9d260e915b62b0f96c5a43349dea38d6

    SHA1

    b22ebce85f49166c90896c0a8b48ed5dcfcff117

    SHA256

    eba1b30081d4bd67d76e0eb2b6b466051ea604bd5aee9accd38a599de36d0508

    SHA512

    d4cb65bb577190041c10569281e8a54f396e49c917c065397be1537243d24f76c30e1f413602833ab37ff3a92956baed8d4f8fd06794f1211328f87b7993b705

    Download Submit

  • memory/752-17-0x0000000003270000-0x0000000003353000-memory.dmp

    Filesize

    908KB

    Download

  • memory/752-2-0x0000000003270000-0x0000000003353000-memory.dmp

    Filesize

    908KB

    Download

  • memory/752-10-0x0000000003270000-0x0000000003353000-memory.dmp

    Filesize

    908KB

    Download

  • memory/752-12-0x0000000003270000-0x0000000003353000-memory.dmp

    Filesize

    908KB

    Download

  • memory/752-13-0x0000000003270000-0x0000000003353000-memory.dmp

    Filesize

    908KB

    Download

  • memory/752-14-0x0000000003270000-0x0000000003353000-memory.dmp

    Filesize

    908KB

    Download

  • memory/752-9-0x0000000003270000-0x0000000003353000-memory.dmp

    Filesize

    908KB

    Download

  • memory/752-0-0x0000000003270000-0x0000000003353000-memory.dmp

    Filesize

    908KB

    Download

  • memory/752-15-0x0000000003270000-0x0000000003353000-memory.dmp

    Filesize

    908KB

    Download

  • memory/752-13618-0x0000000003270000-0x0000000003353000-memory.dmp

    Filesize

    908KB

    Download

  • memory/752-13603-0x0000000003270000-0x0000000003353000-memory.dmp

    Filesize

    908KB

    Download

  • memory/752-2872-0x0000000003270000-0x0000000003353000-memory.dmp

    Filesize

    908KB

    Download

  • memory/3280-1095-0x000002299B440000-0x000002299B460000-memory.dmp

    Filesize

    128KB

    Download

  • memory/3280-1039-0x000002299B220000-0x000002299B240000-memory.dmp

    Filesize

    128KB

    Download

  • memory/3280-1023-0x000002299AC00000-0x000002299AD00000-memory.dmp

    Filesize

    1024KB

    Download