Analysis

  • max time kernel
    72s
  • max time network
    148s
  • 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

    885KB

  • MD5

    b648b7305df49492c44a1280ec2228a0

  • SHA1

    ce77bd3224f47ae4b8a04bd4b4be91c3550de294

  • SHA256

    d73f6e240766ddd6c3c16eff8db50794ab8ab95c6a616d4ab2bc96780f13464d

  • SHA512

    2b2bb13bedbce537f28cd58e23e54ace05f717ac1e4e3e4672768a4604e99ce9f35ee377ecd0677713729d066a1f730050d968f4a8dc3cb3cf6f5aaf86cd9737

  • SSDEEP

    24576:pIr/f/LUup7zmMl8tOKnvwYQ62jaeekMEoBmn6o:pMUS2Ml8trnvwYQ62japkMEQS6o

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: 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.

  • 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 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.

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 WriteProcessMemory
    PID:2404
    • 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:640
      • C:\Windows\system32\vssadmin.exe
        C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:3316
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4236
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
    • Suspicious use of SetWindowsHookEx
    PID:3100
  • 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:1184
  • 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:2036

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    1KB

    MD5

    3ea719301224c4cc13063efa4fd91d8f

    SHA1

    f49feaf562566e94c4eca8c151624e9bf39775bf

    SHA256

    6785977e363ed614f778efc564c6b3c5d28473a8c14c895793d0c9c791374f8d

    SHA512

    ac1db933bc28cc419022ff2bbeb15d8ba860a6a00f6dfd9b1f1774596a1ee2cbb09476ca09a2960f9db4b9b78738953a23cd1d332ff44fffa78e610348eef524

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

    Filesize

    2KB

    MD5

    a8978ee4037b957ab1103957422cd791

    SHA1

    f0aba1193a83a439b9e4ce5eee42390ea18508b4

    SHA256

    f6c75a0444fbc34b4ea1aeee7cb1846a7f87f7295cf3d4b08ba8af8506024899

    SHA512

    4c34ac44d5718f379e8ff74effce862facb4056bdbea474043bac9f3b201d37c20eb2ed3f063b815d8b27851f7ee85d958770a48088b0f59960581a1d2157b0f

  • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133832483576021296.txt

    Filesize

    75KB

    MD5

    74b5bd33894aaa1782df2ce8c9e55dc4

    SHA1

    07f477b61d06b628ab98ff93d80cb1e64b91e0a6

    SHA256

    6a0e0f09758a18e8225c5be3b8a8346e60b23b09903d38ca6996ec2c64531acf

    SHA512

    975f2af0467d03c030ecebaaf85cf4054bed9f055a70a4a61e5d1ec44359cc7f1e743d274276d778de70e7a1f22202c7301d206b805aaf57c5dacca4ed6f2a30

  • C:\Users\Admin\AppData\Local\Packages\microsoft.windows.search_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\3ZAEQS7A\microsoft.windows[1].xml

    Filesize

    97B

    MD5

    175978b179e44c17e6d9d4a0a9a7b009

    SHA1

    935002d93e6746ed107c549b230beaf1ae386946

    SHA256

    49701a6da2f34c73fb3bbad4f7130ea6185120815b2f57ea552b52d291afb890

    SHA512

    fd913e9bb9c042c264040197b4c936e95d0b07d3dab9f28d4aafd067642280be284f58c85808c49ef176399ecfe5a6499c6e94ef27f448d53c6cf71325ccbe13

  • memory/1184-1157-0x000001EA4E560000-0x000001EA4E660000-memory.dmp

    Filesize

    1024KB

  • memory/1184-1162-0x000001EA4F180000-0x000001EA4F1A0000-memory.dmp

    Filesize

    128KB

  • memory/1184-1206-0x000001EA4F140000-0x000001EA4F160000-memory.dmp

    Filesize

    128KB

  • memory/1184-1208-0x000001EA4FB50000-0x000001EA4FB70000-memory.dmp

    Filesize

    128KB

  • memory/2036-2941-0x000001FCC7ED0000-0x000001FCC7EF0000-memory.dmp

    Filesize

    128KB

  • memory/2036-2974-0x000001FCC86C0000-0x000001FCC86E0000-memory.dmp

    Filesize

    128KB

  • memory/2036-2972-0x000001FCC7E90000-0x000001FCC7EB0000-memory.dmp

    Filesize

    128KB

  • memory/2036-2938-0x000001FCC7170000-0x000001FCC7270000-memory.dmp

    Filesize

    1024KB

  • memory/2036-2937-0x000001FCC7170000-0x000001FCC7270000-memory.dmp

    Filesize

    1024KB