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Analysis

  • max time kernel
    161s
  • max time network
    130s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    22/10/2023, 15:35

General

  • Target

    sample.exe

  • Size

    138KB

  • MD5

    29cd4e58fa0e2eb5fe000153fccbeaa4

  • SHA1

    6eb4bde6dd030a02800be2d374087b23aecd2503

  • SHA256

    ad328952c84a602fff1affae679f1a5edcd9b481e752c9963fdb23c2ee6a5d68

  • SHA512

    1843d3d221f82830a246f4ca6f118ee4e67654bc852674b62dcd3b8381697c0d945e6e01ac43d6b27e2f72059cf05c692148e7b9aa5ba9c5630dc403d35dbb75

  • SSDEEP

    3072:/Pgv1uTga8za7/aApO6fCR6kMglPTX8jI8VD/dJJO04aN5uvvmRE7xIxT62Bb09Q:HKNTMPVDdzR1N5sAxJN9dRd

Score
9/10

Malware Config

Signatures

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (6286) files with added filename extension

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

  • Loads dropped DLL 6 IoCs
  • Enumerates connected drives 3 TTPs 2 IoCs

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

  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Interacts with shadow copies 2 TTPs 1 IoCs

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

  • Modifies registry class 3 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 10 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\sample.exe
    "C:\Users\Admin\AppData\Local\Temp\sample.exe"
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2188
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1976
      • C:\Windows\system32\vssadmin.exe
        vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:2852
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2824
  • C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    1⤵
      PID:2040
    • C:\Windows\system32\rundll32.exe
      "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Pictures\UnpublishOut.wmf.EMAIL=[[email protected]]ID=[908D28930971C614].harward
      1⤵
      • Loads dropped DLL
      • Modifies registry class
      PID:1804
    • C:\Windows\system32\rundll32.exe
      "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Pictures\UnprotectInitialize.pcx.EMAIL=[[email protected]]ID=[908D28930971C614].harward
      1⤵
      • Loads dropped DLL
      • Modifies registry class
      PID:2144
    • C:\Windows\system32\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Pictures\FILE ENCRYPTED.txt
      1⤵
        PID:2372
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Desktop\SetResolve.ps1xml.EMAIL=[[email protected]]ID=[908D28930971C614].harward
        1⤵
        • Loads dropped DLL
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:300
        • C:\Windows\system32\NOTEPAD.EXE
          "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\SetResolve.ps1xml.EMAIL=[[email protected]]ID=[908D28930971C614].harward
          2⤵
          • Opens file in notepad (likely ransom note)
          PID:864

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\ProgramData\FILE ENCRYPTED.txt

        Filesize

        332B

        MD5

        8d247069f409856bb7c8795d2f57a8db

        SHA1

        34b7f0c49e9a24d70c9cbb2f874404fe66ffaf4a

        SHA256

        4eacc71e0663eb5b6d06118effe5f35af4cb33ca10084b61a5d326a8b6ce3fa1

        SHA512

        a596c4a0c6a2024a7fa7757e3977a0c52328bf2442f0aa608642121adea679e6e3183ea7de7da77ba30c7a7c8161afcd13c2a2fe7589699b3992ee4e81ceb883

      • C:\Users\Admin\Desktop\SetResolve.ps1xml.EMAIL=[[email protected]]ID=[908D28930971C614].harward

        Filesize

        619KB

        MD5

        840b6ca78a3c7aabc13703911a3cf674

        SHA1

        4e4475836030cbaf53d2a828ea642bc75b859469

        SHA256

        46d857cf7afe4d098e25f59020eb77554120f121b95ec1c2dc4c25c829aab0c2

        SHA512

        dd89abb5736071970c1ec1f9f8bfa932e3815e5f751df2fa2b67e88bfb98ce3ef06f3c781eb0b17a5bb3a91d937d243e48830d30aa13d3d04cb2255904ae7e6a

      • C:\Users\Admin\Pictures\FILE ENCRYPTED.txt

        Filesize

        332B

        MD5

        8d247069f409856bb7c8795d2f57a8db

        SHA1

        34b7f0c49e9a24d70c9cbb2f874404fe66ffaf4a

        SHA256

        4eacc71e0663eb5b6d06118effe5f35af4cb33ca10084b61a5d326a8b6ce3fa1

        SHA512

        a596c4a0c6a2024a7fa7757e3977a0c52328bf2442f0aa608642121adea679e6e3183ea7de7da77ba30c7a7c8161afcd13c2a2fe7589699b3992ee4e81ceb883

      • \PROGRA~1\MICROS~2\Office14\1033\GrooveIntlResource.dll

        Filesize

        8.4MB

        MD5

        48019bd50a809545c202053313cd4b57

        SHA1

        60c431499a9f225334032a2f13b825f7a9da8680

        SHA256

        f9d97706a48caead3004a695b57c252103a67f0be66ba58807b1ed430bbb74fd

        SHA512

        f0ab826b0ee57de7909041671462b87f52fa2837501d1f4fa85d159aadab77f340b12cf5f97ab8a4c1b1d6428c35561e9118f6bb5b3c86628bd93b3d8b7198aa

      • \PROGRA~1\MICROS~2\Office14\1033\GrooveIntlResource.dll

        Filesize

        8.4MB

        MD5

        48019bd50a809545c202053313cd4b57

        SHA1

        60c431499a9f225334032a2f13b825f7a9da8680

        SHA256

        f9d97706a48caead3004a695b57c252103a67f0be66ba58807b1ed430bbb74fd

        SHA512

        f0ab826b0ee57de7909041671462b87f52fa2837501d1f4fa85d159aadab77f340b12cf5f97ab8a4c1b1d6428c35561e9118f6bb5b3c86628bd93b3d8b7198aa

      • \PROGRA~1\MICROS~2\Office14\1033\GrooveIntlResource.dll

        Filesize

        8.4MB

        MD5

        48019bd50a809545c202053313cd4b57

        SHA1

        60c431499a9f225334032a2f13b825f7a9da8680

        SHA256

        f9d97706a48caead3004a695b57c252103a67f0be66ba58807b1ed430bbb74fd

        SHA512

        f0ab826b0ee57de7909041671462b87f52fa2837501d1f4fa85d159aadab77f340b12cf5f97ab8a4c1b1d6428c35561e9118f6bb5b3c86628bd93b3d8b7198aa

      • \PROGRA~1\MICROS~2\Office14\GROOVEEX.DLL

        Filesize

        6.4MB

        MD5

        a71a930e1e61e73da97423bdb95ce2d8

        SHA1

        8779f17ce0f68aef21969e39e1d84019bea04118

        SHA256

        80f65cbcf64bf5de2c957c83af1a41e9fd624bb88c873a4204ccde77ed428be7

        SHA512

        6f36d227d8328b411a8a7eb776eb49de7a4dcb8e18df5caccbf27114b56a79c327b1c9b13bb2d18ff6ca3738bb3a13d819c9b5693385d0a4fe385586f03beac5

      • \PROGRA~1\MICROS~2\Office14\GROOVEEX.DLL

        Filesize

        6.4MB

        MD5

        a71a930e1e61e73da97423bdb95ce2d8

        SHA1

        8779f17ce0f68aef21969e39e1d84019bea04118

        SHA256

        80f65cbcf64bf5de2c957c83af1a41e9fd624bb88c873a4204ccde77ed428be7

        SHA512

        6f36d227d8328b411a8a7eb776eb49de7a4dcb8e18df5caccbf27114b56a79c327b1c9b13bb2d18ff6ca3738bb3a13d819c9b5693385d0a4fe385586f03beac5

      • \PROGRA~1\MICROS~2\Office14\GROOVEEX.DLL

        Filesize

        6.4MB

        MD5

        a71a930e1e61e73da97423bdb95ce2d8

        SHA1

        8779f17ce0f68aef21969e39e1d84019bea04118

        SHA256

        80f65cbcf64bf5de2c957c83af1a41e9fd624bb88c873a4204ccde77ed428be7

        SHA512

        6f36d227d8328b411a8a7eb776eb49de7a4dcb8e18df5caccbf27114b56a79c327b1c9b13bb2d18ff6ca3738bb3a13d819c9b5693385d0a4fe385586f03beac5