Analysis

  • max time kernel
    149s
  • max time network
    97s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/06/2024, 11:38

General

  • Target
    81a61aaba9bcbf04a9e8736592610344636febfa0e1b0ebf457a9656f428684d.exe
  • Size 68KB
  • Sample240603-nrxc2aed59
  • SHA256 81a61aaba9bcbf04a9e8736592610344636febfa0e1b0ebf457a9656f428684d
  • MD5 SHA1 SHA512 SSDEEP
Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Enumerates connected drives 3 TTPs 21 IoCs

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

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 4 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 20 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
      PID:3156
      • C:\Users\Admin\AppData\Local\Temp\81a61aaba9bcbf04a9e8736592610344636febfa0e1b0ebf457a9656f428684d.exe
        "C:\Users\Admin\AppData\Local\Temp\81a61aaba9bcbf04a9e8736592610344636febfa0e1b0ebf457a9656f428684d.exe"
        2⤵
        • Drops file in Windows directory
        • Suspicious use of WriteProcessMemory
        PID:1864
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\$$a3577.bat
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:2604
          • C:\Users\Admin\AppData\Local\Temp\81a61aaba9bcbf04a9e8736592610344636febfa0e1b0ebf457a9656f428684d.exe
            "C:\Users\Admin\AppData\Local\Temp\81a61aaba9bcbf04a9e8736592610344636febfa0e1b0ebf457a9656f428684d.exe"
            4⤵
            • Executes dropped EXE
            PID:724
        • C:\Windows\Logo1_.exe
          C:\Windows\Logo1_.exe
          3⤵
          • Executes dropped EXE
          • Enumerates connected drives
          • Drops file in Program Files directory
          • Drops file in Windows directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1988
          • C:\Windows\SysWOW64\net.exe
            net stop "Kingsoft AntiVirus Service"
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:856
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 stop "Kingsoft AntiVirus Service"
              5⤵
                PID:4428

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            GoogleUpdateCore.exe

            • Path C:\Program Files (x86)\Google\Update\1.3.36.151\GoogleUpdateCore.exe
            • Size 252KB
            • SHA256 3ba0a07458d09c252ebe8d3ce4ee35c56605cda7e8a99cc07ea90caa334bf239
            • MD5 SHA1 SHA512 SSDEEP

            7z.exe

            • Path C:\Program Files\7-Zip\7z.exe
            • Size 571KB
            • SHA256 81e9aca35afcb1236486714ddb1c830e4a65af10eb00f735c01d41b1d65e1331
            • MD5 SHA1 SHA512 SSDEEP

            windowsdesktop-runtime-8.0.2-win-x64.exe

            • Path C:\ProgramData\Package Cache\{63880b41-04fc-4f9b-92c4-4455c255eb8c}\windowsdesktop-runtime-8.0.2-win-x64.exe
            • Size 637KB
            • SHA256 a22e6d0f5c7d44fefc2204e0f7c7b048e1684f6cf249ba98c006bbf791c22d19
            • MD5 SHA1 SHA512 SSDEEP

            $$a3577.bat

            • Path C:\Users\Admin\AppData\Local\Temp\$$a3577.bat
            • Size 722B
            • SHA256 a562a46c00b04e58d57ef1ea64c083a0e3671bc4e26077db874cd65b848e4e23
            • MD5 SHA1 SHA512

            81a61aaba9bcbf04a9e8736592610344636febfa0e1b0ebf457a9656f428684d.exe.exe

            • Path C:\Users\Admin\AppData\Local\Temp\81a61aaba9bcbf04a9e8736592610344636febfa0e1b0ebf457a9656f428684d.exe.exe
            • Size 41KB
            • SHA256 cd24c61fe7dc3896c6c928c92a2adc58fab0a3ff61ef7ddcac1ba794182ab12f
            • MD5 SHA1 SHA512 SSDEEP

            Logo1_.exe

            • Path C:\Windows\Logo1_.exe
            • Size 27KB
            • SHA256 02f4bf41aa6efbc2a49158fe1da4dbfadc09b0ff26e0c9553b593d527e771ed6
            • MD5 SHA1 SHA512 SSDEEP

            _desktop.ini

            • Path F:\$RECYCLE.BIN\S-1-5-21-3906287020-2915474608-1755617787-1000\_desktop.ini
            • Size 8B
            • SHA256 d9d875805581110dafdfb2ceb34c5e60f50fe720963f9813c287e4845248d208
            • MD5 SHA1 SHA512

            memory/1864-9-0x0000000000400000-0x0000000000435000-memory.dmp

            memory/1864-0-0x0000000000400000-0x0000000000435000-memory.dmp

            memory/1988-27-0x0000000000400000-0x0000000000435000-memory.dmp

            memory/1988-37-0x0000000000400000-0x0000000000435000-memory.dmp

            memory/1988-33-0x0000000000400000-0x0000000000435000-memory.dmp

            memory/1988-1231-0x0000000000400000-0x0000000000435000-memory.dmp

            memory/1988-20-0x0000000000400000-0x0000000000435000-memory.dmp

            memory/1988-4797-0x0000000000400000-0x0000000000435000-memory.dmp

            memory/1988-11-0x0000000000400000-0x0000000000435000-memory.dmp

            memory/1988-5236-0x0000000000400000-0x0000000000435000-memory.dmp