Overview

overview

10

Static

static

3

winprofile

windows7-x64

10

winprofile

windows10-1703-x64

10

Analysis

  • max time kernel
    294s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    14-05-2024 05:00

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General

  • Target

    d73f6e240766ddd6c3c16eff8db50794ab8ab95c6a616d4ab2bc96780f13464d.exe

  • Size

    885KB

  • MD5

    b648b7305df49492c44a1280ec2228a0

  • SHA1

    ce77bd3224f47ae4b8a04bd4b4be91c3550de294

  • SHA256

    d73f6e240766ddd6c3c16eff8db50794ab8ab95c6a616d4ab2bc96780f13464d

  • SHA512

    2b2bb13bedbce537f28cd58e23e54ace05f717ac1e4e3e4672768a4604e99ce9f35ee377ecd0677713729d066a1f730050d968f4a8dc3cb3cf6f5aaf86cd9737

  • SSDEEP

    24576:pIr/f/LUup7zmMl8tOKnvwYQ62jaeekMEoBmn6o:pMUS2Ml8trnvwYQ62japkMEQS6o

Score
10/10
blackbastadefense_evasionexecutionimpactpersistenceransomware

Malware Config

Extracted

Path

C:\Program Files\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: d87708c4-408b-4b02-97b9-071781f49f9c *!* 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
  • Loads dropped DLL 1 IoCs
  • 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
  • Interacts with shadow copies 2 TTPs 1 IoCs

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

    ransomware
  • Modifies registry class 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 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.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\d73f6e240766ddd6c3c16eff8db50794ab8ab95c6a616d4ab2bc96780f13464d.exe
    "C:\Users\Admin\AppData\Local\Temp\d73f6e240766ddd6c3c16eff8db50794ab8ab95c6a616d4ab2bc96780f13464d.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 WriteProcessMemory
    PID:2072
    • 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:1736
      • C:\Windows\system32\vssadmin.exe
        C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:2268
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1096

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Program Files\instructions_read_me.txt
    Filesize

    1KB

    MD5

    3ea719301224c4cc13063efa4fd91d8f

    SHA1

    f49feaf562566e94c4eca8c151624e9bf39775bf

    SHA256

    6785977e363ed614f778efc564c6b3c5d28473a8c14c895793d0c9c791374f8d

    SHA512

    ac1db933bc28cc419022ff2bbeb15d8ba860a6a00f6dfd9b1f1774596a1ee2cbb09476ca09a2960f9db4b9b78738953a23cd1d332ff44fffa78e610348eef524

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  • \Program Files\Microsoft Office\Office14\VISSHE.DLL
    Filesize

    953KB

    MD5

    2f4759c23abcd639ac3ca7f8fa9480ac

    SHA1

    9a3fece585fa01b7b941e124ead0c39c8ce9bc7c

    SHA256

    6d66fa59407862e0fddfcb36472fe810eb308653321ca0e374ac870f9aa8cec6

    SHA512

    6ab14d6a8d3e9a751d68133e734cc804de2b50a7ef223d484d0f727cdfbd00d48f6e0666c3b86a0daf9ca42c0b726f6c2a088e5bb32c993748abfea7b5904ec6

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