Analysis

  • max time kernel
    70s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    11/06/2024, 08:43

General

  • Target

    7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe

  • Size

    543KB

  • MD5

    998022b70d83c6de68e5bdf94e0f8d71

  • SHA1

    b87a947f3e85701fcdadd733e9b055a65a3b1308

  • SHA256

    7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a

  • SHA512

    2744b77f951bd2bb34b094dd3b54fcf8f7dca76e03c745809edc045749c814c7d88c9ddd69ad684a1c156716afae76b5ebec3f932d0f2a72b242878134f65647

  • SSDEEP

    12288:M1DTMHixr1moQqUiXINDl/m1s6BQio67VlA:AzmoQqUiXw2s6yiVx

Malware Config

Extracted

Path

C:\Program Files\readme.txt

Ransom Note
Your data are stolen and encrypted The data will be published on TOR website if you do not pay the ransom You can contact us and decrypt one file for free on this TOR site (you should download and install TOR browser first https://torproject.org) https://aazsbsgya565vlu2c6bzy6yfiebkcbtvvcytvolt33s77xypi7nypxyd.onion:80/ Your company id for log in: ba7a7058-3531-4b67-bae6-d602e9110361
URLs

https://aazsbsgya565vlu2c6bzy6yfiebkcbtvvcytvolt33s77xypi7nypxyd.onion:80/

Signatures

  • Black Basta

    A ransomware family targeting Windows and Linux ESXi first seen in February 2022.

  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (3411) files with added filename extension

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

  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 3 IoCs
  • Interacts with shadow copies 2 TTPs 2 IoCs

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

  • Modifies registry class 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 10 IoCs
  • Suspicious use of WriteProcessMemory 23 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\7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
    "C:\Users\Admin\AppData\Local\Temp\7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe"
    1⤵
    • Sets desktop wallpaper using registry
    • Drops file in Program Files directory
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1548
    • 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:2092
      • C:\Windows\system32\vssadmin.exe
        C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:2484
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Windows\System32\vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2548
      • C:\Windows\SysWOW64\vssadmin.exe
        C:\Windows\System32\vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:2752
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2840
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2440
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 5CD01CA005A881B7F586331781514E63
      2⤵
        PID:4060

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Program Files\readme.txt

            Filesize

            401B

            MD5

            ab8018847c007394feabfa8f14626ebc

            SHA1

            d4669c9e29be5e1f32d7c30bf65ec8bd72566b2f

            SHA256

            2967e1d97d32605fc5ace49a10828800fbbefcc1e010f6004a9c88ef3ecdad88

            SHA512

            0f893ccd2add411ed93cade6519f9d2faf22831c60c279f355355406b72d92670a33b6b04362becb2344f3ff0b6ff979d9c078b24628c9de65cd421cf43402b9

          • C:\Windows\Installer\MSI3AB0.tmp

            Filesize

            257KB

            MD5

            d1f5ce6b23351677e54a245f46a9f8d2

            SHA1

            0d5c6749401248284767f16df92b726e727718ca

            SHA256

            57cb8f01cf553c3886760180d1a74839f2f676640115504485aca9692f577acc

            SHA512

            960e90894e7bedcc89894e77e57e8ee0c99dd2c530d02665e8bbd3a1793eccc1e295c5923d1f37c757fa1158097fbaae70898c16052882d3d210c29ea801b3ba

          • C:\Windows\Installer\MSI7810.tmp

            Filesize

            256KB

            MD5

            f08a878a99fd52be9b618d02112641e8

            SHA1

            b92222e084a6ae1166efb5547d61a52daee0e667

            SHA256

            a3e94f6fe1230524f1a0b408610d8119ed540e69ff06cd14d8c488988d27a3f9

            SHA512

            309b84c8d8e4e69b2bc65b22e73fd6b8d4410616bcb11344a314ab1fd92930333ad7919753d2cd4248e266404c61a7029754975bcbfc6be64c4bd032b7a9cc07

          • \Windows\Installer\MSI4E9E.tmp

            Filesize

            363KB

            MD5

            4a843a97ae51c310b573a02ffd2a0e8e

            SHA1

            063fa914ccb07249123c0d5f4595935487635b20

            SHA256

            727ecf287fb6f4953ee7748913dd559b4f8d3a022fa2ca55bc51cf5886c52086

            SHA512

            905c081552d95b523ecf1155b6c7e157652e5ff00cda30c1c21124d266eb7d305c3398d6832316f403dc45d1b639f1a5a67aea29922cd1a032f52e5247ec55d2