Analysis

  • max time kernel
    151s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    07-05-2024 13:32

General

  • Target

    a391f0b4b19ea7189df5320bb2c44f30_NEAS.exe

  • Size

    2.6MB

  • MD5

    a391f0b4b19ea7189df5320bb2c44f30

  • SHA1

    078c1836a49bed9672f999aa31a4409730e8872e

  • SHA256

    684ff6aeffa333f9f2f55ca6bede9d52c72a8536a725ed78045d7eff7c1413a2

  • SHA512

    af7dd79a90bdf989728b8ef0cbccec9757d96a51258709d0dc9b1615d7f1006b9a85166069e629b393db1e4948d08ec9d7d41d8bcb37e0bd17110ef6ebaf3d50

  • SSDEEP

    49152:XXzhpDtKSK1cb8PGK+Tfuqmpc3elWo8GnQAsYZEVL:XXzhW148Pd+Tf1mpcOldJQ3/VL

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
  • Creates scheduled task(s) 1 TTPs 3 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 32 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a391f0b4b19ea7189df5320bb2c44f30_NEAS.exe
    "C:\Users\Admin\AppData\Local\Temp\a391f0b4b19ea7189df5320bb2c44f30_NEAS.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
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2892
    • \??\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
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2552
      • \??\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
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2508
        • \??\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
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2372
          • \??\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
            • Suspicious use of SetWindowsHookEx
            PID:2748
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 13:34 /f
            5⤵
            • Creates scheduled task(s)
            PID:2484
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 13:35 /f
            5⤵
            • Creates scheduled task(s)
            PID:2692
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 13:36 /f
            5⤵
            • Creates scheduled task(s)
            PID:1096
      • C:\Windows\Explorer.exe
        C:\Windows\Explorer.exe
        3⤵
          PID:2420

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Windows\Resources\spoolsv.exe

      Filesize

      192KB

      MD5

      a893beab99b5154772370df91db65d19

      SHA1

      9da60fb24ebf6002e4567db50ebd9b5b6d83743c

      SHA256

      8751da2ff37c9a49d8faa09abbc7f3ab6155e34d749ed5c902d110a234f5b7ae

      SHA512

      493db120f6e3bd73a253a72021a272cb099d3b5b252972c66397f946725f1d902309a6a50b0316af150b00db8f23c135644d3d82420a8f20e4e2aa4c900ad412

    • \??\c:\windows\resources\spoolsv.exe

      Filesize

      576KB

      MD5

      a986a37627285181bdf3a69ba2282bfe

      SHA1

      1bdf5e5ee67b73593a353a6e7ff7bc59992ba57a

      SHA256

      d9d13c39eba409501b4240d1fc55a3913bf950685382c88b990893c6a4a15122

      SHA512

      3ca4bf6a3dff74a4c826ddb5e1faf9979c5d4d81e895f734312796b7f5f789fe51194b9921bbca90fc76db7745fcdc7b1ae7a83b3d13e784b24b6340fc619b31

    • \Windows\Resources\Themes\explorer.exe

      Filesize

      448KB

      MD5

      df2a4c9e3399c519f3bfcd5716c08ab5

      SHA1

      fd9c8ede36c915e85ac867faa9bcafe88e47c7cf

      SHA256

      c1f6f6fb063d7faad12cc88d549c9b8ba794309ce13d502c90f128dfb5151a1b

      SHA512

      eb8c1992a75e489d5858b74b27c9e60f2b482f13297fbfe7d05ccc3adc5ac29be225e95af987c617eeee244dfcf00eb9abbbab3e52aa3f5403da65135915b7c1

    • \Windows\Resources\svchost.exe

      Filesize

      128KB

      MD5

      0bf7ebea6caddda3c342b14a2d89a594

      SHA1

      9e776088a1ab7ef936f2162361cf3229f2a264f0

      SHA256

      d2d9e27955c91bab2c9411113c134fc56153da7a8c1d66858a0dac6ff9abdfbd

      SHA512

      227048ed93e257b1a47c31f36d88d3e0aa44a25fb253421c1760b2ed217c7594a130a6c7bd8cc1480db6852ff607d14b8aae3ab3937d5cc6b56c72a8e0778d17

    • memory/2372-74-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2372-58-0x0000000003120000-0x0000000003736000-memory.dmp

      Filesize

      6.1MB

    • memory/2372-55-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2372-43-0x0000000003120000-0x0000000003736000-memory.dmp

      Filesize

      6.1MB

    • memory/2372-36-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2508-24-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2508-50-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2552-52-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2552-67-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2552-23-0x00000000032F0000-0x0000000003906000-memory.dmp

      Filesize

      6.1MB

    • memory/2552-12-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2552-54-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2552-53-0x00000000032F0000-0x0000000003906000-memory.dmp

      Filesize

      6.1MB

    • memory/2748-44-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2748-48-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2892-51-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2892-11-0x0000000003340000-0x0000000003956000-memory.dmp

      Filesize

      6.1MB

    • memory/2892-35-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2892-0-0x0000000000400000-0x0000000000A16000-memory.dmp

      Filesize

      6.1MB

    • memory/2892-1-0x0000000077330000-0x0000000077332000-memory.dmp

      Filesize

      8KB