Analysis

  • max time kernel
    150s
  • max time network
    101s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/05/2024, 10:18

General

  • Target
    f39b1a7b3dfe4a04e8ce9c39f890c6e270bf6ca3faa5ae4335b46c4bb3ae4fef.exe
  • Size 393KB
  • Sample240523-mcfajach8z
  • SHA256 f39b1a7b3dfe4a04e8ce9c39f890c6e270bf6ca3faa5ae4335b46c4bb3ae4fef
  • MD5 SHA1 SHA512 SSDEEP
Score
7/10

Malware Config

Signatures

  • Drops startup file 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • 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 64 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
      PID:3340
      • C:\Users\Admin\AppData\Local\Temp\f39b1a7b3dfe4a04e8ce9c39f890c6e270bf6ca3faa5ae4335b46c4bb3ae4fef.exe
        "C:\Users\Admin\AppData\Local\Temp\f39b1a7b3dfe4a04e8ce9c39f890c6e270bf6ca3faa5ae4335b46c4bb3ae4fef.exe"
        2⤵
        • Drops file in Windows directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1088
        • C:\Windows\SysWOW64\net.exe
          net stop "Kingsoft AntiVirus Service"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:4736
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 stop "Kingsoft AntiVirus Service"
            4⤵
              PID:1140
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\$$a40C2.bat
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:3316
            • C:\Users\Admin\AppData\Local\Temp\f39b1a7b3dfe4a04e8ce9c39f890c6e270bf6ca3faa5ae4335b46c4bb3ae4fef.exe
              "C:\Users\Admin\AppData\Local\Temp\f39b1a7b3dfe4a04e8ce9c39f890c6e270bf6ca3faa5ae4335b46c4bb3ae4fef.exe"
              4⤵
              • Executes dropped EXE
              PID:4384
          • C:\Windows\Logo1_.exe
            C:\Windows\Logo1_.exe
            3⤵
            • Drops startup file
            • 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:4812
            • C:\Windows\SysWOW64\net.exe
              net stop "Kingsoft AntiVirus Service"
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:4512
              • C:\Windows\SysWOW64\net1.exe
                C:\Windows\system32\net1 stop "Kingsoft AntiVirus Service"
                5⤵
                  PID:1764
              • C:\Windows\SysWOW64\net.exe
                net stop "Kingsoft AntiVirus Service"
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:2956
                • C:\Windows\SysWOW64\net1.exe
                  C:\Windows\system32\net1 stop "Kingsoft AntiVirus Service"
                  5⤵
                    PID:3384

          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 258KB
                • SHA256 a978211529b28a3b66408c32636b82ef4405121d57e90a911c60f3810be3c0cc
                • MD5 SHA1 SHA512 SSDEEP

                7z.exe

                • Path C:\Program Files\7-Zip\7z.exe
                • Size 577KB
                • SHA256 02cff7e352a7c94505a1d1c73425ec9968637b9010c8c017dc70f7d6a78a3a45
                • 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 643KB
                • SHA256 c6319cafefc4565c3dd8521b77ec90dc57b1108fb10a60b3874f3c57b37f239d
                • MD5 SHA1 SHA512 SSDEEP

                $$a40C2.bat

                • Path C:\Users\Admin\AppData\Local\Temp\$$a40C2.bat
                • Size 722B
                • SHA256 b89d28f24ba7e9491d9e9e8df3e7bb8ba0a65b2ae07d92ab4381f2db92245db8
                • MD5 SHA1 SHA512

                f39b1a7b3dfe4a04e8ce9c39f890c6e270bf6ca3faa5ae4335b46c4bb3ae4fef.exe.exe

                • Path C:\Users\Admin\AppData\Local\Temp\f39b1a7b3dfe4a04e8ce9c39f890c6e270bf6ca3faa5ae4335b46c4bb3ae4fef.exe.exe
                • Size 360KB
                • SHA256 9e63701598199d5c47217e23b44d0e3ec5d53f5419166b1b6c68a7e9e8fc47a4
                • MD5 SHA1 SHA512 SSDEEP

                Logo1_.exe

                • Path C:\Windows\Logo1_.exe
                • Size 33KB
                • SHA256 02424a4ca6ac65d66c89b79493d30a0c54c46da6ec225ef5ae1c724913451a08
                • MD5 SHA1 SHA512 SSDEEP

                _desktop.ini

                • Path F:\$RECYCLE.BIN\S-1-5-21-2804150937-2146708401-419095071-1000\_desktop.ini
                • Size 9B
                • SHA256 94de8b492bc2db9a9592f7c9433547eb7f80826ed67f48d2bb7e22db9d49f544
                • MD5 SHA1 SHA512

                memory/1088-10-0x0000000000400000-0x000000000043F000-memory.dmp

                memory/1088-0-0x0000000000400000-0x000000000043F000-memory.dmp

                memory/4812-11-0x0000000000400000-0x000000000043F000-memory.dmp

                memory/4812-5220-0x0000000000400000-0x000000000043F000-memory.dmp

                memory/4812-18-0x0000000000400000-0x000000000043F000-memory.dmp

                memory/4812-8741-0x0000000000400000-0x000000000043F000-memory.dmp