Analysis

  • max time kernel
    107s
  • max time network
    121s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/10/2024, 16:55

General

  • Target

    276266af14e9a2dc56e8c18d00653507320a6645c044099716932d254eddd2f1N.exe

  • Size

    91KB

  • MD5

    a429d46613b5a670196811c6a32f0ff0

  • SHA1

    0ff11ae617a15c4dcb5bc098909a4f4267d11427

  • SHA256

    276266af14e9a2dc56e8c18d00653507320a6645c044099716932d254eddd2f1

  • SHA512

    8111086415fd87aac1b04133fa062c94c7e5c2c9b420b7d90b754e7f57b58549a44064d8eaeb0f2007a3a3f373b07e3eb496ff30eecd09a14f9caab9259631fa

  • SSDEEP

    1536:QRsjdIZfaif4YrxCjjKnouy8VzHRsjdIZfaif4YrxCjjKnouy8VzK:QOyZy9wCjOouttHOyZy9wCjOouttK

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
  • Disables RegEdit via registry modification 2 IoCs
  • Disables use of System Restore points 1 TTPs
  • Executes dropped EXE 7 IoCs
  • Modifies system executable filetype association 2 TTPs 13 IoCs
  • Adds Run key to start application 2 TTPs 5 IoCs
  • Drops file in System32 directory 6 IoCs
  • UPX packed file 18 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Drops file in Windows directory 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

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

  • Modifies Control Panel 4 IoCs
  • Modifies registry class 15 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of SetWindowsHookEx 8 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs
  • System policy modification 1 TTPs 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\276266af14e9a2dc56e8c18d00653507320a6645c044099716932d254eddd2f1N.exe
    "C:\Users\Admin\AppData\Local\Temp\276266af14e9a2dc56e8c18d00653507320a6645c044099716932d254eddd2f1N.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Modifies visibility of file extensions in Explorer
    • Modifies visiblity of hidden/system files in Explorer
    • Disables RegEdit via registry modification
    • Modifies system executable filetype association
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:8
    • C:\Windows\xk.exe
      C:\Windows\xk.exe
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:4700
    • C:\Windows\SysWOW64\IExplorer.exe
      C:\Windows\system32\IExplorer.exe
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:3584
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:2516
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:1964
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:4980
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:244
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:2936

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\WINDOWS\CSRSS.EXE

          Filesize

          91KB

          MD5

          9caed95e6c7760ba6b4279d1454eadc2

          SHA1

          08c48b16e23a490294b54b497a8acb332a71129a

          SHA256

          aa77022fa10182b5c7343527baaa43e141446cc3d4625cebf9891f55a1472b27

          SHA512

          e69ad794692ddd4d459cd42ff35c9a8f03d90254640d5db9c8167edd895ae45b6942d2cba0bcedd28f5303338fb0975272c0f0ddb3ae44c90de939779e63cda4

        • C:\Users\Admin\AppData\Local\WINDOWS\LSASS.EXE

          Filesize

          91KB

          MD5

          e652a489e4eb7c440f696a45e13967fb

          SHA1

          3faf32ca345c065e2588b5e69032768447b07154

          SHA256

          4585aa9460991dd33de7525622b7ef999f8349edb359cd64b739d0289e148891

          SHA512

          cb319d56bff1817eac0a9570aca775f62739b56fb9c6a9390a1a384d62b5f7dc7d12877cb337f67796d3fa21d51cf86be4a25adccef4052930ebae31484495e0

        • C:\Users\Admin\AppData\Local\WINDOWS\SERVICES.EXE

          Filesize

          91KB

          MD5

          7aa476d2820e23861e889c0d6371232e

          SHA1

          0150a568695048769aa58dd1826e3de4e3d82850

          SHA256

          2b6ac90386f6fd7f4bffe93f64ad978626b5d811c43247ec01247cd824526b51

          SHA512

          8329f3876de6a3552eaddf4c58aaf0b234c31ada3b77ba66300487c3bdac690f51c6e8ba39a35d989a2baecd0c0286c3c20e07a3ecd770d0d333d2675a4b0367

        • C:\Users\Admin\AppData\Local\WINDOWS\SMSS.EXE

          Filesize

          91KB

          MD5

          bbfe1c0981e0affb70b15e912988883b

          SHA1

          703fc64af1bc75876a51ac676ed681cadc6dcabc

          SHA256

          dcfa4ef6c01479a91a50e83e0e00d93c78c76f150329ab2becd64ece5071db33

          SHA512

          67a971bb946b230e760f54601171c1e6d24f438d19ef6930e0f502539d489b19481c32f8adbb4ed2813b08d53ebdcd9dc5289c0e31e3ce470a8e4f3588329cb7

        • C:\Users\Admin\AppData\Local\WINDOWS\WINLOGON.EXE

          Filesize

          91KB

          MD5

          ef5ffdf657a4ac63ac083ca0fbdebcb6

          SHA1

          126a530aeb20faba6c294f9c53f3370272f2f26b

          SHA256

          b2ec91bc4df0ed89b41bec4e0d3863658b81f058cfffaea8eb0c6169bdba038d

          SHA512

          a29676416aabe1167f098b118cd989fb76808eb907fdacd8ff4c59e92b5d905c51ea17fba8c5a76c194f4b213cc18995445ec6513f6d462e4669aa23d6ffed97

        • C:\Users\Admin\AppData\Local\winlogon.exe

          Filesize

          91KB

          MD5

          a429d46613b5a670196811c6a32f0ff0

          SHA1

          0ff11ae617a15c4dcb5bc098909a4f4267d11427

          SHA256

          276266af14e9a2dc56e8c18d00653507320a6645c044099716932d254eddd2f1

          SHA512

          8111086415fd87aac1b04133fa062c94c7e5c2c9b420b7d90b754e7f57b58549a44064d8eaeb0f2007a3a3f373b07e3eb496ff30eecd09a14f9caab9259631fa

        • C:\Windows\SysWOW64\IExplorer.exe

          Filesize

          91KB

          MD5

          eefcdcede9a1a4101bddf17e5d310de6

          SHA1

          9f823c6096a429d36de9e59e2c5b4346495c3c53

          SHA256

          1762aa16b295c497f62efaf2416f2b8bac3b070dd0d99b618110e83d77320015

          SHA512

          48f1504672b78178fee03fa4e8fcb5b648787eb2625e01e129a639a8965bcd6a55f930d7eee319441cdcbe360306ce5a1a4a8d21c09595d7f794c7ba20181d20

        • C:\Windows\xk.exe

          Filesize

          91KB

          MD5

          a68ea8042d88018a26016a0c5977b19f

          SHA1

          b2df82dd82cf5a6935a2db0c577cd237bd331e99

          SHA256

          ccdd2268d0eda40c63f4bde4aa351dc65b22cc74f2dd1dce4f2d7689cfeaa196

          SHA512

          f33136edc552315db546fb0aebf49b265bb81f2aac799e91e5da2eee44282a53dedc4689b460a0299ac4a41beade9959d323ad0fd18a5b7697cae24c426bc143

        • memory/8-156-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/8-0-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/244-146-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/1964-132-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/2516-125-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/2936-150-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/2936-154-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/3584-118-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/4700-112-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB

        • memory/4980-140-0x0000000000400000-0x000000000042F000-memory.dmp

          Filesize

          188KB