Analysis

  • max time kernel
    120s
  • 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, 10:39

General

  • Target

    4c94bd82103e915b07c9c68f52fd55e0N.exe

  • Size

    2.6MB

  • MD5

    4c94bd82103e915b07c9c68f52fd55e0

  • SHA1

    9f16769de516835de4b54ba6481cb0a576ff2fad

  • SHA256

    cb380a4e22199067b5f96a64bffba9c647622b8168b130dba05ac8eade53b326

  • SHA512

    58c5ca4cf908ce426bc0ec1676057a3f03a9c7286beff2729670128df05dcb038c2d45d659c51efd8b5aecaec1067762db6093fd9dce2a85dd3a4e618d8eca82

  • SSDEEP

    49152:lS5IvAG44oOCdcSzNIJG70V6Do4yV/5mc5aNZJ350zg5bEJ60IZGnpw/YP:lS5G4DOT5JGIVzh/5aZX0zgd0IZGpwC

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\4c94bd82103e915b07c9c68f52fd55e0N.exe
    "C:\Users\Admin\AppData\Local\Temp\4c94bd82103e915b07c9c68f52fd55e0N.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:2712
    • \??\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:2740
      • \??\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:2052
        • \??\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:2628
          • \??\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:2648
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 10:41 /f
            5⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:2684
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 10:42 /f
            5⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:764
      • C:\Windows\Explorer.exe
        C:\Windows\Explorer.exe
        3⤵
          PID:1060

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Windows\Resources\spoolsv.exe

      Filesize

      2.6MB

      MD5

      f79e74c96c523b4de3dfd8955918dbc9

      SHA1

      d2319e15711ed22eb325fe491948a56c4d486a76

      SHA256

      910a6802ca3b255973e4b080d95a17e780081751e1572afee7d5ad7d3bb70053

      SHA512

      2f358dc848176bcd5058e450693e155d87319c31308f4dde26473af02e23ab02312316bd3fbdc9b2b7593494ab4a83af3942e530466a35d9857ff4c114bf7d72

    • \Windows\Resources\Themes\explorer.exe

      Filesize

      2.6MB

      MD5

      86239c36aaa65bb6da918f341e338df6

      SHA1

      5f70a670218b79ae418bd14118821d061394bb00

      SHA256

      522247149894a808e87a5e33eb060442488e2690f4e4c4d42abf41cd664a0163

      SHA512

      f34a01ce115159f57adbbbecd56b57ecd145f9591a6c696225687d91a068c1c6a4fae78288a6550267aa4bb106b68f666b2eac5e7e3386839b4c58ad46cf9e08

    • \Windows\Resources\svchost.exe

      Filesize

      2.6MB

      MD5

      6ac260b57da0130cf0ca91fab5f8e477

      SHA1

      a0ad7eb65ba8ed68b946646f3b4a3409dbd25151

      SHA256

      e01e4127268c44a54be886fa106c60edee56b2656f5f134611f28e4952df8c3c

      SHA512

      5ec3d776b3e19c5d339b1bc59d1a237a7a59c12255d75472e5febd8874a99fdfd3c74af8ba6c0ae2022966b00d726715cf2fa1ee55f0fd73450e4de2a71c4a32

    • memory/2052-23-0x0000000000400000-0x0000000000A13000-memory.dmp

      Filesize

      6.1MB

    • memory/2052-51-0x0000000000400000-0x0000000000A13000-memory.dmp

      Filesize

      6.1MB

    • memory/2628-68-0x0000000000400000-0x0000000000A13000-memory.dmp

      Filesize

      6.1MB

    • memory/2628-58-0x00000000032E0000-0x00000000038F3000-memory.dmp

      Filesize

      6.1MB

    • memory/2628-56-0x0000000000400000-0x0000000000A13000-memory.dmp

      Filesize

      6.1MB

    • memory/2628-35-0x0000000000400000-0x0000000000A13000-memory.dmp

      Filesize

      6.1MB

    • memory/2648-44-0x0000000000400000-0x0000000000A13000-memory.dmp

      Filesize

      6.1MB

    • memory/2648-49-0x0000000000400000-0x0000000000A13000-memory.dmp

      Filesize

      6.1MB

    • memory/2712-53-0x0000000000400000-0x0000000000A13000-memory.dmp

      Filesize

      6.1MB

    • memory/2712-42-0x0000000003260000-0x0000000003873000-memory.dmp

      Filesize

      6.1MB

    • memory/2712-33-0x0000000000400000-0x0000000000A13000-memory.dmp

      Filesize

      6.1MB

    • memory/2712-0-0x0000000000400000-0x0000000000A13000-memory.dmp

      Filesize

      6.1MB

    • memory/2712-1-0x0000000077000000-0x0000000077002000-memory.dmp

      Filesize

      8KB

    • memory/2740-43-0x0000000000400000-0x0000000000A13000-memory.dmp

      Filesize

      6.1MB

    • memory/2740-54-0x00000000033D0000-0x00000000039E3000-memory.dmp

      Filesize

      6.1MB

    • memory/2740-55-0x0000000000400000-0x0000000000A13000-memory.dmp

      Filesize

      6.1MB

    • memory/2740-22-0x00000000033D0000-0x00000000039E3000-memory.dmp

      Filesize

      6.1MB

    • memory/2740-11-0x0000000000400000-0x0000000000A13000-memory.dmp

      Filesize

      6.1MB

    • memory/2740-65-0x0000000000400000-0x0000000000A13000-memory.dmp

      Filesize

      6.1MB

    • memory/2740-69-0x0000000000400000-0x0000000000A13000-memory.dmp

      Filesize

      6.1MB