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Analysis

  • max time kernel
    94s
  • max time network
    19s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    25/08/2024, 06:54

General

  • Target

    8f503a109e77031961be0c791f41c6e0N.exe

  • Size

    2.6MB

  • MD5

    8f503a109e77031961be0c791f41c6e0

  • SHA1

    322e56e5abd3b3f27cbe5d0ae322c9d408a18e78

  • SHA256

    c010f5ae0c0614c2077f6f346cc82d850b837aa743ecb62eac197ee7e8964f7b

  • SHA512

    86d64819b112a56a1997f48d043e7fc802fd975d935e19538d6799b2c11321486f5370a10351d305e1040f234435657720ecfd61a408121d884b627f38b87075

  • SSDEEP

    49152:WXzhpDtKSK1cb8PGK+Tfuqmpc3elWo8GnQAsYZEVu:WXzhW148Pd+Tf1mpcOldJQ3/Vu

Malware Config

Signatures

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 5 IoCs
  • Checks BIOS information in registry 2 TTPs 10 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 4 IoCs
  • Themida packer 22 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Adds Run key to start application 2 TTPs 4 IoCs
  • Checks whether UAC is enabled 1 TTPs 5 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
  • Drops file in Windows directory 4 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of SetWindowsHookEx 10 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8f503a109e77031961be0c791f41c6e0N.exe
    "C:\Users\Admin\AppData\Local\Temp\8f503a109e77031961be0c791f41c6e0N.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Loads dropped DLL
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2540
    • \??\c:\windows\resources\themes\explorer.exe
      c:\windows\resources\themes\explorer.exe
      2⤵
      • Modifies visiblity of hidden/system files in Explorer
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Checks BIOS information in registry
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in System32 directory
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:556
      • \??\c:\windows\resources\spoolsv.exe
        c:\windows\resources\spoolsv.exe SE
        3⤵
        • Identifies VirtualBox via ACPI registry values (likely anti-VM)
        • Checks BIOS information in registry
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks whether UAC is enabled
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2456
        • \??\c:\windows\resources\svchost.exe
          c:\windows\resources\svchost.exe
          4⤵
          • Modifies visiblity of hidden/system files in Explorer
          • Identifies VirtualBox via ACPI registry values (likely anti-VM)
          • Checks BIOS information in registry
          • Executes dropped EXE
          • Loads dropped DLL
          • Adds Run key to start application
          • Checks whether UAC is enabled
          • Drops file in System32 directory
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2840
          • \??\c:\windows\resources\spoolsv.exe
            c:\windows\resources\spoolsv.exe PR
            5⤵
            • Identifies VirtualBox via ACPI registry values (likely anti-VM)
            • Checks BIOS information in registry
            • Executes dropped EXE
            • Checks whether UAC is enabled
            • Suspicious use of NtSetInformationThreadHideFromDebugger
            • System Location Discovery: System Language Discovery
            • Suspicious use of SetWindowsHookEx
            PID:2416
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 06:56 /f
            5⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:2612
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 06:57 /f
            5⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:2712
      • C:\Windows\Explorer.exe
        C:\Windows\Explorer.exe
        3⤵
          PID:2008

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Windows\Resources\spoolsv.exe

      Filesize

      2.6MB

      MD5

      279bb22471d17f3d0b90aac8375fee7d

      SHA1

      2e59092f6c938361d7be996f77d2042dbea5ca0d

      SHA256

      7954a05ea5dc04620ddef8931b5b261b6b5b3206eb93d36110b99bfbc704be63

      SHA512

      925793f6ac2ad4ea18e1ee27f7d55aabe3c9db168298b99c54222a3a355c75c437e972a3e16f64d791b124ceeef62060e1f363220494c31a37f0caf827ab1328

    • \Windows\Resources\Themes\explorer.exe

      Filesize

      2.6MB

      MD5

      a9e636db3a44009c53cab10e17b72491

      SHA1

      c93fbb82e7db76c6191e6d65a1b1cdde8a68a3c3

      SHA256

      8b09af0fd03806ff9e817b68ededc4972cbaa0fbd5283e3b928b7777adeaade1

      SHA512

      11dbd1e142797ae8c5ec005da952ca1d5f7f000cf2b71d9a8a956afaccfa751773d699e540afbf7e163df6a4b14d585937b0761a306175998d40fd5012aa5026

    • \Windows\Resources\svchost.exe

      Filesize

      2.6MB

      MD5

      f59d236e6f750cf577d7c7db070ba373

      SHA1

      04b04d693a1aed018b4722028f74865ebd7f2029

      SHA256

      026540557d12e9d266f9260b266067278b4d247f7733b8270856e3f90cbf52ca

      SHA512

      8bd46a53a3ea077371ba6cb092ae3661d3f4151a37bc93cd031b1f5d8c671ac6e758b83e94af53c5593698ff624c1525bb0b7ca7c8b0416ca8837e85749e5328

    • memory/556-57-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/556-12-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/556-13-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/556-80-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/556-24-0x0000000003370000-0x0000000003986000-memory.dmp

      Filesize

      6.1MB

    • memory/556-49-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/556-58-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/556-70-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/556-72-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2416-54-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2416-48-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2456-37-0x00000000033A0000-0x00000000039B6000-memory.dmp

      Filesize

      6.1MB

    • memory/2456-26-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2456-55-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2456-25-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2540-1-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2540-56-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2540-0-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2540-42-0x0000000003400000-0x0000000003A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2540-38-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2540-11-0x0000000003400000-0x0000000003A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2840-47-0x0000000003340000-0x0000000003956000-memory.dmp

      Filesize

      6.1MB

    • memory/2840-41-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2840-59-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2840-61-0x0000000003340000-0x0000000003956000-memory.dmp

      Filesize

      6.1MB