Overview

overview

10

Static

static

3

file.dll

windows7-x64

10

file.dll

windows10-2004-x64

10

Analysis

  • max time kernel
    143s
  • max time network
    145s
  • 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

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General

  • Target

    file.dll

  • Size

    448KB

  • MD5

    ce99e91e6c2a6defe1a86462870ba321

  • SHA1

    f3d31b5d4bec32a50e8a76430c801d1b8c4e6b70

  • SHA256

    58ddbea084ce18cfb3439219ebcf2fc5c1605d2f6271610b1c7af77b8d0484bd

  • SHA512

    005fc1fedaa4862134e3f38f6521302b6f9db82117b70e17c95157a4205a84348dbbcb5a037c125da89d32621740b4bf1613935da32a5555a8a1eb17b6f42106

  • SSDEEP

    12288:VPNXbjc+dHPgpgA6RiagtnIkJvEFZoZ/g1n:VFjZegjiagtnhOFZA/g1

Score
10/10
blackbastacredential_accessdiscoveryransomwarespywarestealer

Malware Config

Extracted

Path

C:\ProgramData\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: fff1e8d5-e1fb-4a01-99cf-eb3bb30fb61a *!* 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
  • Renames multiple (11859) files with added filename extension

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

    ransomware
  • Credentials from Password Stores: Windows Credential Manager 1 TTPs

    Suspicious access to Credentials History.

    credential_accessstealer
  • Reads user/profile data of web browsers 3 TTPs

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

    spywarestealer
  • Drops desktop.ini file(s) 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

    discovery
  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Modifies registry class 3 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\file.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1060
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\file.dll,#1
      2⤵
      • Drops desktop.ini file(s)
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:4532
      • C:\Windows\SysWOW64\cmd.exe
        cmd.exe /c start /MAX notepad.exe c:\instructions_read_me.txt
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2476
        • C:\Windows\SysWOW64\notepad.exe
          notepad.exe c:\instructions_read_me.txt
          4⤵
          • System Location Discovery: System Language Discovery
          • Opens file in notepad (likely ransom note)
          PID:2836

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\instructions_read_me.txt
    Filesize

    1KB

    MD5

    93efcdab5cb0f8a8f2e67b09a3af2357

    SHA1

    53458d51c28d0c713d0e6036081b57bb68ad3c27

    SHA256

    8da6acc7b10038448df2769378963333d44a0f2546f64f65733077fb228edc7b

    SHA512

    a8ec981e6397ae93955f1453b19d7c81550da1e1ed237b0ee6275cf478341c9ec2914472c5d4ecf0ebc26bfb962cf0b15a4b814feeffede70785973e6f2903c2

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