Analysis

  • max time kernel
    30s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/10/2024, 19:05

General

  • Target

    03c6a9d33ee04a561bfa6be072127f1e6ac207e2fb17d6ebfaf8736fa66485feN.exe

  • Size

    319KB

  • MD5

    bfcb558461c2ca676ac4fd2a36845940

  • SHA1

    22e825c7297f7e59954b69aafe525a1251b5f873

  • SHA256

    03c6a9d33ee04a561bfa6be072127f1e6ac207e2fb17d6ebfaf8736fa66485fe

  • SHA512

    d28af0f1815cb878756c04a18f19627152aa8a7cb59c0a4ca0458e0175df0eedbf4fc2e84d0a0aa4540196d73c33be4390c156c5e31a89fb437a2eb2000c9020

  • SSDEEP

    6144:AxhF4cS+wWJH7igNgjdFKsCRARoYlld9n2Qpm:AxM1zX9oYX

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
  • 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\03c6a9d33ee04a561bfa6be072127f1e6ac207e2fb17d6ebfaf8736fa66485feN.exe
    "C:\Users\Admin\AppData\Local\Temp\03c6a9d33ee04a561bfa6be072127f1e6ac207e2fb17d6ebfaf8736fa66485feN.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:4168
    • C:\Windows\xk.exe
      C:\Windows\xk.exe
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:3896
    • 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:5044
    • 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:4452
    • 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:3520
    • 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:4756
    • 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:3772
    • 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:2400

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          319KB

          MD5

          394e40f6b6613ca9eec94728f15db345

          SHA1

          740c43374c8a873316ec94e8a4114786c9378eeb

          SHA256

          d48f1bb2a30d3bbcdf4a4edfbdc8f1df25df55391799d080e2ab652527025a36

          SHA512

          55c9072359765a8e04d928f89968d997a690ed7559f96c3b867d950db575753d1eae76d8b83ea7231b2e21b0f79a1798e013172d13b83bb33ba35296ec3e6f60

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

          Filesize

          319KB

          MD5

          bfcb558461c2ca676ac4fd2a36845940

          SHA1

          22e825c7297f7e59954b69aafe525a1251b5f873

          SHA256

          03c6a9d33ee04a561bfa6be072127f1e6ac207e2fb17d6ebfaf8736fa66485fe

          SHA512

          d28af0f1815cb878756c04a18f19627152aa8a7cb59c0a4ca0458e0175df0eedbf4fc2e84d0a0aa4540196d73c33be4390c156c5e31a89fb437a2eb2000c9020

        • C:\Windows\SysWOW64\IExplorer.exe

          Filesize

          319KB

          MD5

          28b0bb7193f4e6f496fc3a5f16ff2154

          SHA1

          ed0330204d32766c43873901b29cc9319ff3ba6c

          SHA256

          ccd6d8d028e3c0c6f98d2f2bb5240e099f1e1ca17b3a6daec3b9527c4f920283

          SHA512

          368d9a9bd9300ee5af1e3164cc889b13d5aade62072c846d66ca38a8fc70fd99ef9642fa74058bd47ca2999484c716d32e73511511c2a30de20ffce23f11f5d8

        • C:\Windows\xk.exe

          Filesize

          319KB

          MD5

          d5f079b2a37f1991016b389e9056f7e8

          SHA1

          4dfab957739b90e6d8768a943ce9f23dd90cdbd3

          SHA256

          ecca90090706020cfa46f5c07429f97b4a1c390112d20bdd2aa70e19574d6e99

          SHA512

          7b71128ce080ae7ad26f7495ddbbef83a3d49e18b2fe5f70081744e0f02068a39b26e0e3276005156cad8c7bf1a6cba7d51f967976bbe83273bb0a079f42c7c4