Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/04/2024, 12:20

General

  • Target
    kjh37fyB3v.exe
  • Size 3.1MB
  • Sample240423-ph5hqagb85
  • SHA256 9d38f89adecd2d85b288ef859f8b8a886903635ec6cb889d959ced046fb385a4
  • MD5 SHA1 SHA512 SSDEEP
Score
8/10

Malware Config

Signatures

  • Modifies Installed Components in the registry 2 TTPs 5 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Obfuscated with Agile.Net obfuscator 2 IoCs

    Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

  • Drops desktop.ini file(s) 1 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Suspicious use of NtSetInformationThreadHideFromDebugger 36 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 30 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 7 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\kjh37fyB3v.exe
    "C:\Users\Admin\AppData\Local\Temp\kjh37fyB3v.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3668
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C choice /C Y /N /D Y /T 3 & Del "C:\Users\Admin\AppData\Local\Temp\5F3A6525.dll" /A:H
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:624
      • C:\Windows\system32\choice.exe
        choice /C Y /N /D Y /T 3
        3⤵
          PID:3128
    • C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
      "C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\Documents\Recently.docx" /o ""
      1⤵
      • Checks processor information in registry
      • Enumerates system info in registry
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious use of SetWindowsHookEx
      PID:1152
    • C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
      "C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\Documents\Recently.docx" /o ""
      1⤵
        PID:1128
      • C:\Windows\System32\rundll32.exe
        C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
        1⤵
          PID:4984
        • C:\Program Files (x86)\Windows Media Player\wmplayer.exe
          "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /Play -Embedding
          1⤵
          • Suspicious use of WriteProcessMemory
          PID:4564
          • C:\Program Files (x86)\Windows Media Player\setup_wm.exe
            "C:\Program Files (x86)\Windows Media Player\setup_wm.exe" /RunOnce:"C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /Play -Embedding
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:2456
            • C:\Windows\SysWOW64\unregmp2.exe
              C:\Windows\system32\unregmp2.exe /ShowWMP /SetShowState /CreateMediaLibrary
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:4520
              • C:\Windows\system32\unregmp2.exe
                "C:\Windows\SysNative\unregmp2.exe" /ShowWMP /SetShowState /CreateMediaLibrary /REENTRANT
                4⤵
                • Modifies Installed Components in the registry
                • Drops desktop.ini file(s)
                • Drops file in Program Files directory
                • Modifies registry class
                PID:4640
            • C:\Program Files (x86)\Windows Media Player\wmplayer.exe
              "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /Relaunch /Play C:\Users\Admin\Desktop\UnregisterImport.mp2
              3⤵
              • Enumerates connected drives
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of FindShellTrayWindow
              PID:1972
          • C:\Windows\SysWOW64\unregmp2.exe
            "C:\Windows\System32\unregmp2.exe" /AsyncFirstLogon
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1956
            • C:\Windows\system32\unregmp2.exe
              "C:\Windows\SysNative\unregmp2.exe" /AsyncFirstLogon /REENTRANT
              3⤵
              • Enumerates connected drives
              • Suspicious use of AdjustPrivilegeToken
              PID:2284
        • C:\Windows\system32\svchost.exe
          C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p -s upnphost
          1⤵
          • Drops file in Windows directory
          PID:4544

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              CurrentDatabase_400.wmdb

              • Path C:\Users\Admin\AppData\Local\Microsoft\Media Player\CurrentDatabase_400.wmdb
              • Size 64KB
              • SHA256 f1a4a978ce1c4731df1594043135cf58d084fdf129dd1c8e4507c9e06eac5ea8
              • MD5 SHA1 SHA512 SSDEEP

              CurrentDatabase_400.wmdb

              • Path C:\Users\Admin\AppData\Local\Microsoft\Media Player\CurrentDatabase_400.wmdb
              • Size 1024KB
              • SHA256 63eeb56ae92bc51c168ff0bbe61e7c0f1dc1692532885be0e642e00949022cf6
              • MD5 SHA1 SHA512 SSDEEP

              WMSDKNS.XML.bak

              • Path C:\Users\Admin\AppData\Local\Microsoft\Windows Media\12.0\WMSDKNS.XML.bak
              • Size 9KB
              • SHA256 cb87767c4a384c24e4a0f88455f59101b1ae7b4fb8de8a5adb4136c5f7ee545b
              • MD5 SHA1 SHA512 SSDEEP

              5F3A6525.dll

              • Path C:\Users\Admin\AppData\Local\Temp\5F3A6525.dll
              • Size 1.7MB
              • SHA256 39fdb1db9c56133e62c9635043a403a0cbc77bc97ef3e776b258e2ea2e19cd13
              • MD5 SHA1 SHA512 SSDEEP

              wmsetup.log

              • Path C:\Users\Admin\AppData\Local\Temp\wmsetup.log
              • Size 1KB
              • SHA256 898a98bc4d231fdb76882335d7acee35efff6f28b999b905c66de3dc33cfcf4e
              • MD5 SHA1 SHA512

              memory/1128-47-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1128-44-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1128-48-0x00007FFD654B0000-0x00007FFD654C0000-memory.dmp

              memory/1128-49-0x00007FFD654B0000-0x00007FFD654C0000-memory.dmp

              memory/1128-53-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1128-52-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1128-51-0x00007FFD654B0000-0x00007FFD654C0000-memory.dmp

              memory/1128-50-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1128-46-0x00007FFD654B0000-0x00007FFD654C0000-memory.dmp

              memory/1128-45-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-21-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-55-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-25-0x00007FFD654B0000-0x00007FFD654C0000-memory.dmp

              memory/1152-24-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-27-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-33-0x00007FFD62C50000-0x00007FFD62C60000-memory.dmp

              memory/1152-30-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-32-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-34-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-36-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-29-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-37-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-38-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-42-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-40-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-43-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-39-0x00007FFD62C50000-0x00007FFD62C60000-memory.dmp

              memory/1152-22-0x00007FFD654B0000-0x00007FFD654C0000-memory.dmp

              memory/1152-20-0x00007FFD654B0000-0x00007FFD654C0000-memory.dmp

              memory/1152-19-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-18-0x00007FFD654B0000-0x00007FFD654C0000-memory.dmp

              memory/1152-17-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1152-16-0x00007FFD654B0000-0x00007FFD654C0000-memory.dmp

              memory/1152-99-0x00007FFDA5430000-0x00007FFDA5625000-memory.dmp

              memory/1972-143-0x0000000009360000-0x0000000009370000-memory.dmp

              memory/1972-149-0x0000000009360000-0x0000000009370000-memory.dmp

              memory/1972-158-0x0000000009370000-0x0000000009380000-memory.dmp

              memory/1972-154-0x0000000009360000-0x0000000009370000-memory.dmp

              memory/1972-153-0x0000000009360000-0x0000000009370000-memory.dmp

              memory/1972-152-0x0000000009360000-0x0000000009370000-memory.dmp

              memory/1972-151-0x0000000009370000-0x0000000009380000-memory.dmp

              memory/1972-150-0x0000000009360000-0x0000000009370000-memory.dmp

              memory/1972-141-0x0000000004450000-0x0000000004460000-memory.dmp

              memory/1972-142-0x0000000004450000-0x0000000004460000-memory.dmp

              memory/1972-148-0x0000000009360000-0x0000000009370000-memory.dmp

              memory/1972-144-0x0000000009360000-0x0000000009370000-memory.dmp

              memory/1972-145-0x0000000009360000-0x0000000009370000-memory.dmp

              memory/1972-147-0x0000000009360000-0x0000000009370000-memory.dmp

              memory/1972-146-0x0000000009360000-0x0000000009370000-memory.dmp

              memory/3668-0-0x0000028B60010000-0x0000028B60338000-memory.dmp

              memory/3668-11-0x0000028B7A930000-0x0000028B7A942000-memory.dmp

              memory/3668-4-0x0000028B7A920000-0x0000028B7A930000-memory.dmp

              memory/3668-6-0x0000028B7AEB0000-0x0000028B7B232000-memory.dmp

              memory/3668-8-0x0000028B60700000-0x0000028B60701000-memory.dmp

              memory/3668-14-0x00007FFD871B0000-0x00007FFD87C71000-memory.dmp

              memory/3668-12-0x00007FFD871B0000-0x00007FFD87C71000-memory.dmp

              memory/3668-3-0x00007FFD871B0000-0x00007FFD87C71000-memory.dmp

              memory/3668-10-0x0000028B606F0000-0x0000028B606F6000-memory.dmp