Analysis

  • max time kernel
    120s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    25/08/2024, 08:41

General

  • Target

    3fa8173cb89c967ea4828a933a9e42e0N.exe

  • Size

    2.6MB

  • MD5

    3fa8173cb89c967ea4828a933a9e42e0

  • SHA1

    e62757b9a9d44aab83fb6d4a6575c8ea71029ed6

  • SHA256

    d629977c9ff1649c48d93d2fc489bf8591660a5aa9edd8208b71bf8786658ac9

  • SHA512

    842d6faf1a310c93e4de8f23426e95bbd68b082256f01ec3f4591628a1c07b6d8102e185a050fbd1fc93e8943fd901ed18c324757c2d5b4e15c97d3df5ec4dd6

  • SSDEEP

    49152:lS5IvAG44oOCdcSzNIJG70V6Do4yV/5mc5aNZJ350zg5bEJ60IZGnpw/YA:lS5G4DOT5JGIVzh/5aZX0zgd0IZGpwF

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 18 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\3fa8173cb89c967ea4828a933a9e42e0N.exe
    "C:\Users\Admin\AppData\Local\Temp\3fa8173cb89c967ea4828a933a9e42e0N.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:2488
    • \??\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:2688
      • \??\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:2792
        • \??\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:2564
          • \??\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:2596
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 08:43 /f
            5⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:2604
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 08:44 /f
            5⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:2364
      • C:\Windows\Explorer.exe
        C:\Windows\Explorer.exe
        3⤵
          PID:3008

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Windows\Resources\spoolsv.exe

            Filesize

            2.6MB

            MD5

            5ac319cdd23bc56e986978473f831182

            SHA1

            1564ce3320cf35b59f3b3e0acc83b00f852c4c4f

            SHA256

            e3e8367ae8eaf2178eab67fede8b5ea54c1c93de4c3fe3edb725f082366199a3

            SHA512

            36aaed1c8aa039b37c558aecac10049b12db3e19133deaafd424f3c069c8b40131a124eaf8642f5f929330a00ffecb63b5512a40a25092d52dd55c33a716d8fc

          • C:\Windows\Resources\svchost.exe

            Filesize

            2.6MB

            MD5

            0e79a0dbfadc2871e127cce26a09c0ec

            SHA1

            4af0942199a3061298e8c9957923aec6ca4b3e18

            SHA256

            e7108bd74f4165f44fd00364d4e22043df298b8ce23394963f7652043c8932a5

            SHA512

            07b3f44b327fc94e9ae9a75179e1f28d74aab1bc0b2344f04b0efb6adcf9ff3771134e656777c24ffb8a18ca10fc342120de9c5024f57acc10ad67fcd97e8f3f

          • \Windows\Resources\Themes\explorer.exe

            Filesize

            2.6MB

            MD5

            fdf0b63d47efb66e27b66e26bde76b0f

            SHA1

            6307aa855671ec092d8c53f486b96c5bd584ab67

            SHA256

            d37a4492cd47d212c59afb6a488d78986e54a9c51e8a553250accc0848e8fc75

            SHA512

            ec454158e61c6082e6778f88e0dcd078a735d5bec3edd952622aa569c487c759f6480e0d3784e629fcd52176c7661df56631d06d02ed36f454c16c56c49c21ba

          • memory/2488-53-0x0000000000400000-0x0000000000A13000-memory.dmp

            Filesize

            6.1MB

          • memory/2488-9-0x00000000037A0000-0x0000000003DB3000-memory.dmp

            Filesize

            6.1MB

          • memory/2488-1-0x00000000771C0000-0x00000000771C2000-memory.dmp

            Filesize

            8KB

          • memory/2488-37-0x0000000000400000-0x0000000000A13000-memory.dmp

            Filesize

            6.1MB

          • memory/2488-0-0x0000000000400000-0x0000000000A13000-memory.dmp

            Filesize

            6.1MB

          • memory/2564-36-0x0000000000400000-0x0000000000A13000-memory.dmp

            Filesize

            6.1MB

          • memory/2564-68-0x0000000000400000-0x0000000000A13000-memory.dmp

            Filesize

            6.1MB

          • memory/2564-56-0x0000000000400000-0x0000000000A13000-memory.dmp

            Filesize

            6.1MB

          • memory/2596-44-0x0000000000400000-0x0000000000A13000-memory.dmp

            Filesize

            6.1MB

          • memory/2596-49-0x0000000000400000-0x0000000000A13000-memory.dmp

            Filesize

            6.1MB

          • memory/2688-12-0x0000000000400000-0x0000000000A13000-memory.dmp

            Filesize

            6.1MB

          • memory/2688-54-0x0000000000400000-0x0000000000A13000-memory.dmp

            Filesize

            6.1MB

          • memory/2688-55-0x00000000037D0000-0x0000000003DE3000-memory.dmp

            Filesize

            6.1MB

          • memory/2688-23-0x00000000037D0000-0x0000000003DE3000-memory.dmp

            Filesize

            6.1MB

          • memory/2688-57-0x0000000000400000-0x0000000000A13000-memory.dmp

            Filesize

            6.1MB

          • memory/2688-69-0x0000000000400000-0x0000000000A13000-memory.dmp

            Filesize

            6.1MB

          • memory/2792-51-0x0000000000400000-0x0000000000A13000-memory.dmp

            Filesize

            6.1MB

          • memory/2792-35-0x0000000003730000-0x0000000003D43000-memory.dmp

            Filesize

            6.1MB

          • memory/2792-24-0x0000000000400000-0x0000000000A13000-memory.dmp

            Filesize

            6.1MB