Analysis

  • max time kernel
    1s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-12-2023 03:07

General

  • Target

    25c2cb4f8d5065c286d0b9592d9e87c3.exe

  • Size

    31KB

  • MD5

    25c2cb4f8d5065c286d0b9592d9e87c3

  • SHA1

    0a661db38fb68a4c5f34e906f0abae9f534fa1bd

  • SHA256

    013bf1d566645964f4dc1cfd31d16badad06dffeb0c2aece57f6a7066e02776b

  • SHA512

    dc8571a5410a9a2cf2354122a12486df43fe85c5a4be23e7290687b7acefbec28c2cb3c9b44ecfff95357e1768436ce96f1e3ac6812129f936d69c71d1653593

  • SSDEEP

    384:sy1/LoKfNC/gOlkikHX9Pzf8Xk1X4ViA+oo//xxjAaPnc9+TOQVswSk9uQbjth7m:sj/g8gHCXk1Xb7CxeswN9gx

Score
10/10

Malware Config

Signatures

  • Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Drops file in System32 directory 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Modifies registry class 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\25c2cb4f8d5065c286d0b9592d9e87c3.exe
    "C:\Users\Admin\AppData\Local\Temp\25c2cb4f8d5065c286d0b9592d9e87c3.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3320
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3320 -s 588
      2⤵
      • Program crash
      PID:1852
    • C:\Users\Admin\AppData\Local\Temp\25c2cb4f8d5065c286d0b9592d9e87c3.exe
      "C:\Users\Admin\AppData\Local\Temp\25c2cb4f8d5065c286d0b9592d9e87c3.exe"
      2⤵
      • Adds autorun key to be loaded by Explorer.exe on startup
      • Drops file in System32 directory
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:1692
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3320 -ip 3320
    1⤵
      PID:4212
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del "C:\Users\Admin\AppData\Local\Temp\25C2CB~1.EXE" >> NUL
      1⤵
        PID:64
      • C:\Windows\SysWOW64\svchost.exe
        svchost.exe
        1⤵
        • Loads dropped DLL
        PID:4000

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\LfldjdGe6F.log

        Filesize

        9KB

        MD5

        e75ffa0a49768c956a7c76cdaff3b14b

        SHA1

        a2ae05a4f60569035f84d159364d6d808e3e51f4

        SHA256

        09df071b29964f33febc9669a6a03e923f928d9f60131f4b09e6fd33ee32e4da

        SHA512

        b13fe2933fab5fe7372ec5b6e3c95f639f7d4f0f6d1fb13be78837e524e691a37095b1702aad240d3c46335daa28f683d1bf6997fb9503faac9c25bf9a049f49

      • C:\Windows\SysWOW64\lmsxsltsso.dll

        Filesize

        1KB

        MD5

        0b63edbafaee7fc2a461025a73d7edcd

        SHA1

        11863dfa15f5cb29481b367d2169200b8d384423

        SHA256

        4f4d267d71960b207736658154294a82570f910195993e65dc81bb217fd0faa3

        SHA512

        20e1a54cae1dfc8b211f18d09d252d232b016333402abb202a24e8da6f1960250718c58cae22b3a5a5228bf668399cae3fa96774a29fa2dfdd2dca23599e4f01

      • memory/1692-38-0x0000000000400000-0x0000000000404000-memory.dmp

        Filesize

        16KB

      • memory/1692-28-0x0000000000400000-0x0000000000404000-memory.dmp

        Filesize

        16KB

      • memory/1692-24-0x0000000000400000-0x0000000000404000-memory.dmp

        Filesize

        16KB

      • memory/3320-37-0x00000000022C0000-0x00000000022D0000-memory.dmp

        Filesize

        64KB

      • memory/3320-36-0x00000000022C0000-0x00000000022D0000-memory.dmp

        Filesize

        64KB

      • memory/3320-34-0x00000000022C0000-0x00000000022D0000-memory.dmp

        Filesize

        64KB

      • memory/3320-32-0x00000000022C0000-0x00000000022D0000-memory.dmp

        Filesize

        64KB

      • memory/3320-31-0x00000000022C0000-0x00000000022D0000-memory.dmp

        Filesize

        64KB

      • memory/3320-29-0x00000000022C0000-0x00000000022D0000-memory.dmp

        Filesize

        64KB

      • memory/3320-20-0x00000000022C0000-0x00000000022D0000-memory.dmp

        Filesize

        64KB