Analysis

  • max time kernel
    143s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    01/06/2024, 03:05

General

  • Target
    c709c8ffeedce8eb97a59d33450f1471800da1549e76bfd0158744ffb689e65c.exe
  • Size 91KB
  • Sample240601-dk6ysaff7x
  • SHA256 c709c8ffeedce8eb97a59d33450f1471800da1549e76bfd0158744ffb689e65c
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

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
  • UPX dump on OEP (original entry point) 32 IoCs
  • Disables RegEdit via registry modification 2 IoCs
  • Disables use of System Restore points 1 TTPs
  • Executes dropped EXE 14 IoCs
  • Loads dropped DLL 24 IoCs
  • Modifies system executable filetype association 2 TTPs 13 IoCs
  • UPX packed file 32 IoCs

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

  • Adds Run key to start application 2 TTPs 5 IoCs
  • Drops desktop.ini file(s) 4 IoCs
  • Enumerates connected drives 3 TTPs 22 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in System32 directory 6 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies Control Panel 4 IoCs
  • Modifies Internet Explorer settings 1 TTPs 9 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of SetWindowsHookEx 15 IoCs
  • Suspicious use of WriteProcessMemory 56 IoCs
  • System policy modification 1 TTPs 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c709c8ffeedce8eb97a59d33450f1471800da1549e76bfd0158744ffb689e65c.exe
    "C:\Users\Admin\AppData\Local\Temp\c709c8ffeedce8eb97a59d33450f1471800da1549e76bfd0158744ffb689e65c.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
    • Loads dropped DLL
    • Modifies system executable filetype association
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Modifies Control Panel
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:2184
    • C:\Windows\xk.exe
      C:\Windows\xk.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:1716
    • C:\Windows\SysWOW64\IExplorer.exe
      C:\Windows\system32\IExplorer.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:1016
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:2664
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:2716
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:1608
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:1048
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:1680
    • C:\Windows\xk.exe
      C:\Windows\xk.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:660
    • C:\Windows\SysWOW64\IExplorer.exe
      C:\Windows\system32\IExplorer.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:2272
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:1068
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:940
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:2688
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:960
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:1092
  • C:\Program Files (x86)\Microsoft Office\Office14\OUTLOOK.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\OUTLOOK.EXE" -Embedding
    1⤵
    • Modifies Internet Explorer settings
    • Modifies registry class
    PID:1164

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        winlogon.exe

        • Path C:\Users\Admin\AppData\Local\winlogon.exe
        • Size 91KB
        • SHA256 c709c8ffeedce8eb97a59d33450f1471800da1549e76bfd0158744ffb689e65c
        • MD5 SHA1 SHA512 SSDEEP

        xk.exe

        • Path C:\Windows\xk.exe
        • Size 91KB
        • SHA256 05e75e635dc8fe65af9f9ce5bca07e53b025eba63f865fba55d23044d7022df7
        • MD5 SHA1 SHA512 SSDEEP

        CSRSS.EXE

        • Path \Users\Admin\AppData\Local\WINDOWS\CSRSS.EXE
        • Size 91KB
        • SHA256 3283980863abfebd3af0578d0ce0e78985308566688faf65d06d58dca1fea368
        • MD5 SHA1 SHA512 SSDEEP

        LSASS.EXE

        • Path \Users\Admin\AppData\Local\WINDOWS\LSASS.EXE
        • Size 91KB
        • SHA256 4eecfc8db603d0fb59713083fb3ce87d801a6bce2dfeaf91ef137654d819d726
        • MD5 SHA1 SHA512 SSDEEP

        SERVICES.EXE

        • Path \Users\Admin\AppData\Local\WINDOWS\SERVICES.EXE
        • Size 91KB
        • SHA256 38dc567ea105032953ffc5009e17373600cd4714c330278c5124ec52da1754b4
        • MD5 SHA1 SHA512 SSDEEP

        SMSS.EXE

        • Path \Users\Admin\AppData\Local\WINDOWS\SMSS.EXE
        • Size 91KB
        • SHA256 7dee8b75c83dafbbc520a05cd456fa7302cdc9702064990538c133222e0060dd
        • MD5 SHA1 SHA512 SSDEEP

        WINLOGON.EXE

        • Path \Users\Admin\AppData\Local\WINDOWS\WINLOGON.EXE
        • Size 91KB
        • SHA256 1201fabd5f8622816c3e8c13d5c48be0b400538a57ae94a0efcb6f94ab3c4aa0
        • MD5 SHA1 SHA512 SSDEEP

        IExplorer.exe

        • Path \Windows\SysWOW64\IExplorer.exe
        • Size 91KB
        • SHA256 fc3e09b95388673f84f1fe5e10df9d77f5a2e75f62a6e8dfa1340d784d2bd4ab
        • MD5 SHA1 SHA512 SSDEEP

        memory/660-240-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/940-268-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/940-279-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/960-303-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/1016-127-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/1048-173-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/1068-259-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/1068-255-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/1092-309-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/1608-165-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/1680-186-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/1716-116-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/2184-242-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-0-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/2184-181-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-180-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-157-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-230-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-229-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-243-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-343-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-106-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-335-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/2184-159-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/2184-123-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-111-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-267-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-334-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-146-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-305-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-299-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-302-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2184-301-0x00000000026C0000-0x00000000026EF000-memory.dmp

        memory/2272-247-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/2664-137-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/2688-285-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/2716-148-0x0000000000400000-0x000000000042F000-memory.dmp

        memory/2716-150-0x0000000000400000-0x000000000042F000-memory.dmp