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Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    26/11/2024, 19:35

General

  • Target

    Factuur4388.PDF.exe

  • Size

    772KB

  • MD5

    95f60b5b36d63307d83e3f3de9675a1d

  • SHA1

    da733991d9618b3a3bb5cc503ba0e860f1e8ea29

  • SHA256

    f9ae18f90c502fc22c826eb8322a907fa6ddd2b38fdc1b10353d123b8910e674

  • SHA512

    de63bb1117043ee0a7fb478c4a2ba3d283d7f3d71f39fdbe357d2aa403f8f4a4e7eafe53595794ef99c35156aedd3854ba2e015b259af573492e90c96e3f34ff

  • SSDEEP

    12288:6sFxcCZxPEWJNy93q0DWm9+X6MSUJKzR9wz2U7qdyys2he3gxNMlKglt8RsrtUvy:bHP7gqXpKGNehe3x3r8CU

Malware Config

Extracted

Path

C:\ProgramData\eevbedb.html

Ransom Note
Your documents, photos, databases and other important files have been encrypted with strongest encryption and unique key, generated for this computer. Private decryption key is stored on a secret Internet server and nobody can decrypt your files until you pay and obtain the private key. If you see the main locker window, follow the instructions on the locker. Overwise, it's seems that you or your antivirus deleted the locker program. Now you have the last chance to decrypt your files. Open http://jssestaew3e7ao3q.onion.cab or http://jssestaew3e7ao3q.tor2web.org in your browser. They are public gates to the secret server. If you have problems with gates, use direct connection: 1. Download Tor Browser from http://torproject.org. 2. In the Tor Browser open the http://jssestaew3e7ao3q.onion Note that this server is available via Tor Browser only. Retry in 1 hour if site is not reachable. Copy and paste the following public key in the input form on server. Avoid missprints. Follow the instructions on the server. The list of your encrypted files: Path File
URLs

http://jssestaew3e7ao3q.onion.cab

http://jssestaew3e7ao3q.tor2web.org

http://jssestaew3e7ao3q.onion

Signatures

  • CTB-Locker

    Ransomware family which uses Tor to hide its C2 communications.

  • Ctblocker family
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 1 IoCs
  • Drops desktop.ini file(s) 2 IoCs
  • Enumerates connected drives 3 TTPs 1 IoCs

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

  • Drops file in System32 directory 3 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 6 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 3 IoCs
  • Modifies data under HKEY_USERS 22 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 44 IoCs

Processes

  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k DcomLaunch
    1⤵
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Modifies data under HKEY_USERS
    • Suspicious use of WriteProcessMemory
    PID:600
    • C:\Windows\system32\DllHost.exe
      C:\Windows\system32\DllHost.exe /Processid:{AB8902B4-09CA-4BB6-B78D-A8F59079A8D5}
      2⤵
        PID:2892
      • C:\Windows\system32\wbem\wmiprvse.exe
        C:\Windows\system32\wbem\wmiprvse.exe -Embedding
        2⤵
          PID:2888
      • C:\Windows\Explorer.EXE
        C:\Windows\Explorer.EXE
        1⤵
        • Sets desktop wallpaper using registry
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of UnmapMainImage
        PID:1344
        • C:\Users\Admin\AppData\Local\Temp\Factuur4388.PDF.exe
          "C:\Users\Admin\AppData\Local\Temp\Factuur4388.PDF.exe"
          2⤵
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2132
          • C:\Users\Admin\AppData\Local\Temp\Factuur4388.PDF.exe
            C:\Users\Admin\AppData\Local\Temp\Factuur4388.PDF.exe
            3⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:2860
      • C:\Windows\system32\taskeng.exe
        taskeng.exe {F2365213-1413-4A59-AC79-970B56E69418} S-1-5-18:NT AUTHORITY\System:Service:
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:3040
        • C:\Users\Admin\AppData\Local\Temp\zgczike.exe
          C:\Users\Admin\AppData\Local\Temp\zgczike.exe
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2920
          • C:\Users\Admin\AppData\Local\Temp\zgczike.exe
            C:\Users\Admin\AppData\Local\Temp\zgczike.exe
            3⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:2224
            • C:\Windows\SysWOW64\vssadmin.exe
              vssadmin delete shadows all
              4⤵
              • System Location Discovery: System Language Discovery
              • Interacts with shadow copies
              PID:584
            • C:\Users\Admin\AppData\Local\Temp\zgczike.exe
              "C:\Users\Admin\AppData\Local\Temp\zgczike.exe" -u
              4⤵
              • Executes dropped EXE
              • Drops file in System32 directory
              • Suspicious use of SetThreadContext
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:2008
              • C:\Users\Admin\AppData\Local\Temp\zgczike.exe
                C:\Users\Admin\AppData\Local\Temp\zgczike.exe
                5⤵
                • Checks computer location settings
                • Executes dropped EXE
                • Drops file in System32 directory
                • System Location Discovery: System Language Discovery
                • Modifies Internet Explorer settings
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of FindShellTrayWindow
                • Suspicious use of SendNotifyMessage
                • Suspicious use of SetWindowsHookEx
                PID:1952
      • C:\Windows\system32\AUDIODG.EXE
        C:\Windows\system32\AUDIODG.EXE 0x1c4
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2248

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\ProgramData\Microsoft Help\ubeqvrm

        Filesize

        654B

        MD5

        c23e63fa43e134577c78eabd463ef0b9

        SHA1

        fb4e9e289add1b6df5f691f93359b47951453634

        SHA256

        98b836ab4a7472f136b8b313afe15bb057fbfc485686562938ebf0a65c6bd562

        SHA512

        b379ab19747f29d5df095a83105e8f642e1eb4de007ac8369b58b71e5de558e29a65281ce94ceaaabbab090a568ce4fe10290942ba5c0d2baf6e569ea65c53ea

      • C:\ProgramData\Microsoft Help\ubeqvrm

        Filesize

        654B

        MD5

        411d7c71f788ac7a0f652f90bccf69b5

        SHA1

        22dc952b7deb8457f5758bcb69cb5550a313f8e5

        SHA256

        63eba7145d595a8c02aee28dd0410b665e5c52e4f271626ff6b31574aade125e

        SHA512

        e849ab8021527ff3d722a7ee2b8b26f3d860a765e1251ef672a484a2c544f61d938370f10a6e4645a3ff6f163b5aad8dbfd78fc29c82e521e48e56ff2e952718

      • C:\ProgramData\eevbedb.html

        Filesize

        63KB

        MD5

        b4cc030983238da61a066d51022c1101

        SHA1

        fa5d9ec56e179697ba8e3b5eaef0649c55dd29be

        SHA256

        09155aefe60fade57993abf6d524bedd1028e822c0d32f75b5a7f3ae6ff6223b

        SHA512

        4327c939015ceac036c041cb04915a0f3c4b9ef4639d66601bf1f01a1fdf3546279a97fc268f8f4e342929554a4190022aebac8773e007d822b56560f1d8fae0

      • C:\Users\Admin\AppData\Local\Temp\zgczike.exe

        Filesize

        772KB

        MD5

        95f60b5b36d63307d83e3f3de9675a1d

        SHA1

        da733991d9618b3a3bb5cc503ba0e860f1e8ea29

        SHA256

        f9ae18f90c502fc22c826eb8322a907fa6ddd2b38fdc1b10353d123b8910e674

        SHA512

        de63bb1117043ee0a7fb478c4a2ba3d283d7f3d71f39fdbe357d2aa403f8f4a4e7eafe53595794ef99c35156aedd3854ba2e015b259af573492e90c96e3f34ff

      • F:\$RECYCLE.BIN\S-1-5-18\desktop.ini

        Filesize

        129B

        MD5

        a526b9e7c716b3489d8cc062fbce4005

        SHA1

        2df502a944ff721241be20a9e449d2acd07e0312

        SHA256

        e1b9ce9b57957b1a0607a72a057d6b7a9b34ea60f3f8aa8f38a3af979bd23066

        SHA512

        d83d4c656c96c3d1809ad06ce78fa09a77781461c99109e4b81d1a186fc533a7e72d65a4cb7edf689eeccda8f687a13d3276f1111a1e72f7c3cd92a49bce0f88

      • memory/600-1275-0x00000000005F0000-0x0000000000667000-memory.dmp

        Filesize

        476KB

      • memory/600-335-0x00000000005F0000-0x0000000000667000-memory.dmp

        Filesize

        476KB

      • memory/600-42-0x00000000005F0000-0x0000000000667000-memory.dmp

        Filesize

        476KB

      • memory/600-40-0x00000000005F0000-0x0000000000667000-memory.dmp

        Filesize

        476KB

      • memory/600-45-0x00000000005F0000-0x0000000000667000-memory.dmp

        Filesize

        476KB

      • memory/600-47-0x00000000005F0000-0x0000000000667000-memory.dmp

        Filesize

        476KB

      • memory/600-49-0x00000000005F0000-0x0000000000667000-memory.dmp

        Filesize

        476KB

      • memory/600-38-0x00000000005F0000-0x0000000000667000-memory.dmp

        Filesize

        476KB

      • memory/600-41-0x00000000005F0000-0x0000000000667000-memory.dmp

        Filesize

        476KB

      • memory/1952-1313-0x0000000028B80000-0x0000000028DCB000-memory.dmp

        Filesize

        2.3MB

      • memory/2132-0-0x0000000000360000-0x0000000000364000-memory.dmp

        Filesize

        16KB

      • memory/2224-35-0x0000000028C00000-0x0000000028E4B000-memory.dmp

        Filesize

        2.3MB

      • memory/2224-34-0x0000000000400000-0x00000000004A4600-memory.dmp

        Filesize

        657KB

      • memory/2224-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2224-1287-0x0000000028C00000-0x0000000028E4B000-memory.dmp

        Filesize

        2.3MB

      • memory/2860-6-0x0000000000400000-0x0000000001400000-memory.dmp

        Filesize

        16.0MB

      • memory/2860-15-0x0000000028BA0000-0x0000000028DEB000-memory.dmp

        Filesize

        2.3MB

      • memory/2860-14-0x0000000000401000-0x00000000004A5000-memory.dmp

        Filesize

        656KB

      • memory/2860-10-0x0000000000400000-0x0000000001400000-memory.dmp

        Filesize

        16.0MB

      • memory/2860-12-0x0000000000400000-0x0000000001400000-memory.dmp

        Filesize

        16.0MB

      • memory/2860-13-0x0000000028980000-0x0000000028B9A000-memory.dmp

        Filesize

        2.1MB

      • memory/2860-4-0x0000000000400000-0x0000000001400000-memory.dmp

        Filesize

        16.0MB

      • memory/2860-8-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2860-2-0x00000000001B0000-0x00000000002AA000-memory.dmp

        Filesize

        1000KB

      • memory/2920-20-0x0000000000400000-0x00000000004C1000-memory.dmp

        Filesize

        772KB