Resubmissions

08/07/2024, 06:58

240708-hrtn9axern

07/03/2024, 19:09

240307-xtytbacd5t10

Analysis

  • max time kernel
    1779s
  • max time network
    1164s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    07/03/2024, 19:09

General

  • Target
    VoiceMod-Full-Version-Setup/Voicemod_setup.exe
  • Size 146KB
  • Sample240307-xtytbacd5t
  • SHA256 e3300e30997c5a355f02ca6972711b2ca843d00a393b62c75818a43c27ff128d
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Path
  • C:\3R9qG8i3Z.README.txt

Ransom Note
  • ~~~ PC Locker 3.0 by Mr.Robot~~~ >>>> Your data are stolen and encrypted To get your files back you will have to pay a one-time fee of $45 in bitcoin or monero. >>>> You need contact us and decrypt one file for free on these platforms with your personal DECRYPTION ID Contact the following account on telegram @mr_robot_unlock or paste this link in your browser https://t.me/mr_robot_unlock >>>> Your personal DECRYPTION ID: 4B75BFA39AA770FCEAA086E3FAA19771 >>>> Warning! Do not DELETE or MODIFY any files, it can lead to recovery problems! >>>> Warning! If you do not pay the ransom you will not receive you files NO EXCEPTIONS! >>>> Warning! Any attempt to negotiate or you don't want to pay is INSTANT BLOCK! >>>> Advertisement Would you like to earn thousands of dollars $$$ ? We sell mentorship for stealers, DDOS and ransomware. We only work with professionals and people with money DO NOT WASTE OUR TIME.
URLs
  • https://t.me/mr_robot_unlock

Signatures

  • Renames multiple (547) files with added filename extension

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

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Drops desktop.ini file(s) 2 IoCs
  • Drops file in System32 directory 4 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies Control Panel 2 IoCs
  • Modifies registry class 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: RenamesItself 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 13 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\VoiceMod-Full-Version-Setup\Voicemod_setup.exe
    "C:\Users\Admin\AppData\Local\Temp\VoiceMod-Full-Version-Setup\Voicemod_setup.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Sets desktop wallpaper using registry
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1832
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
      • Drops file in System32 directory
      PID:4560
    • C:\ProgramData\8EE9.tmp
      "C:\ProgramData\8EE9.tmp"
      2⤵
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:1608
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\8EE9.tmp >> NUL
        3⤵
          PID:2108
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
      1⤵
        PID:4228
      • C:\Windows\system32\printfilterpipelinesvc.exe
        C:\Windows\system32\printfilterpipelinesvc.exe -Embedding
        1⤵
        • Drops file in System32 directory
        • Suspicious use of WriteProcessMemory
        PID:804
        • C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE
          /insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{C5BCFB39-FB17-4749-89FF-2BF101C5608F}.xps" 133543136086130000
          2⤵
          • Checks processor information in registry
          • Enumerates system info in registry
          • Suspicious use of SetWindowsHookEx
          PID:3904

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            desktop.ini

            • Path C:\$Recycle.Bin\S-1-5-21-627134735-902745853-4257352768-1000\desktop.ini
            • Size 129B
            • SHA256 2c69d25077f893cc8c7a67e845fe933fa564e2dcb854d4581bb2baa8c4b32de5
            • MD5 SHA1 SHA512

            3R9qG8i3Z.README.txt

            • Path C:\3R9qG8i3Z.README.txt
            • Size 953B
            • SHA256 94ad9d99515168d8c268ac97108aa03f5afd3a8c5789a79a9610d1b3ebd31314
            • MD5 SHA1 SHA512

            8EE9.tmp

            • Path C:\ProgramData\8EE9.tmp
            • Size 14KB
            • SHA256 917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
            • MD5 SHA1 SHA512 SSDEEP

            DDDDDDDDDDDDDDDDDD

            • Path C:\Users\Admin\AppData\Local\Temp\VoiceMod-Full-Version-Setup\DDDDDDDDDDDDDDDDDD
            • Size 146KB
            • SHA256 8c47094093f820c0fc24acb1af5962ad428b75239afc60815156267c73172667
            • MD5 SHA1 SHA512 SSDEEP

            {C84E2092-3CE3-4862-B946-6828AAD5895A}

            • Path C:\Users\Admin\AppData\Local\Temp\{C84E2092-3CE3-4862-B946-6828AAD5895A}
            • Size 4KB
            • SHA256 2e8d7803c23991f4d61260e49f3ea3cbc0bea9292be1dc37dd877503c229370b
            • MD5 SHA1 SHA512 SSDEEP

            DDDDDDDDDDD

            • Path F:\$RECYCLE.BIN\S-1-5-21-627134735-902745853-4257352768-1000\DDDDDDDDDDD
            • Size 129B
            • SHA256 b04f1106b57cf87e684442b1c796581c4d1eceabfec2204641febb8766760799
            • MD5 SHA1 SHA512

            memory/1608-2813-0x000000007FDF0000-0x000000007FDF1000-memory.dmp

            memory/1608-2812-0x000000007FE50000-0x000000007FE51000-memory.dmp

            memory/1608-2811-0x0000000002450000-0x0000000002460000-memory.dmp

            memory/1832-2756-0x0000000002680000-0x0000000002690000-memory.dmp

            memory/1832-2757-0x0000000002680000-0x0000000002690000-memory.dmp

            memory/1832-2758-0x0000000002680000-0x0000000002690000-memory.dmp

            memory/1832-2-0x0000000002680000-0x0000000002690000-memory.dmp

            memory/1832-1-0x0000000002680000-0x0000000002690000-memory.dmp

            memory/1832-0-0x0000000002680000-0x0000000002690000-memory.dmp

            memory/3904-2808-0x00007FF81AE70000-0x00007FF81AE80000-memory.dmp

            memory/3904-2817-0x00007FF85A390000-0x00007FF85A44D000-memory.dmp

            memory/3904-2809-0x00007FF81AE70000-0x00007FF81AE80000-memory.dmp

            memory/3904-2806-0x00007FF81AE70000-0x00007FF81AE80000-memory.dmp

            memory/3904-2805-0x00007FF85ADE0000-0x00007FF85AFE9000-memory.dmp

            memory/3904-2810-0x00007FF85ADE0000-0x00007FF85AFE9000-memory.dmp

            memory/3904-2778-0x00007FF81AE70000-0x00007FF81AE80000-memory.dmp

            memory/3904-2775-0x00007FF85ADE0000-0x00007FF85AFE9000-memory.dmp

            memory/3904-2815-0x00007FF85ADE0000-0x00007FF85AFE9000-memory.dmp

            memory/3904-2814-0x00007FF85ADE0000-0x00007FF85AFE9000-memory.dmp

            memory/3904-2816-0x00007FF85ADE0000-0x00007FF85AFE9000-memory.dmp

            memory/3904-2807-0x00007FF85ADE0000-0x00007FF85AFE9000-memory.dmp

            memory/3904-2819-0x00007FF85ADE0000-0x00007FF85AFE9000-memory.dmp

            memory/3904-2818-0x00007FF818AE0000-0x00007FF818AF0000-memory.dmp

            memory/3904-2821-0x00007FF85ADE0000-0x00007FF85AFE9000-memory.dmp

            memory/3904-2823-0x00007FF85ADE0000-0x00007FF85AFE9000-memory.dmp

            memory/3904-2824-0x00007FF85A390000-0x00007FF85A44D000-memory.dmp

            memory/3904-2822-0x00007FF85ADE0000-0x00007FF85AFE9000-memory.dmp

            memory/3904-2820-0x00007FF818AE0000-0x00007FF818AF0000-memory.dmp

            memory/3904-2772-0x00007FF81AE70000-0x00007FF81AE80000-memory.dmp

            memory/3904-2840-0x00007FF85ADE0000-0x00007FF85AFE9000-memory.dmp

            memory/3904-2841-0x00007FF85ADE0000-0x00007FF85AFE9000-memory.dmp

            memory/3904-2842-0x00007FF85A390000-0x00007FF85A44D000-memory.dmp

            memory/3904-2843-0x00007FF85ADE0000-0x00007FF85AFE9000-memory.dmp