Analysis

  • max time kernel
    147s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/05/2024, 04:41

General

  • Target

    692ce1f8cb6f66d46bf5196bada8e8f0_NEAS.exe

  • Size

    72KB

  • MD5

    692ce1f8cb6f66d46bf5196bada8e8f0

  • SHA1

    c9458b3ed8876e209d882bb66e1f58db7ebfef38

  • SHA256

    b5ac65f16b86188e50a14c0853c2d395052d78ec2e6d3be4b13bddcc7d3fac24

  • SHA512

    e73c501c7bed11eb6da91bf7c59cd7ae412983401241e84fc9779e381da8ce7cd91f1febe25f25c511feb0a1bc8ea2238094deb710a59c15be2a6fdb566e158e

  • SSDEEP

    768:qGHV45EDE477AZbUJx0rZGE3jCELoiMMj6hZ3nE+EXVmkDbjRL8Khc15Z6J1Su:qG14P477AxUYrZGoC09k0SkTRHhWqP

Malware Config

Signatures

  • Blocklisted process makes network request 3 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

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

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\692ce1f8cb6f66d46bf5196bada8e8f0_NEAS.exe
    "C:\Users\Admin\AppData\Local\Temp\692ce1f8cb6f66d46bf5196bada8e8f0_NEAS.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3116
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&c:\cntfown.exe "C:\Users\Admin\AppData\Local\Temp\692ce1f8cb6f66d46bf5196bada8e8f0_NEAS.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1144
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 2
        3⤵
        • Runs ping.exe
        PID:1532
      • \??\c:\cntfown.exe
        c:\cntfown.exe "C:\Users\Admin\AppData\Local\Temp\692ce1f8cb6f66d46bf5196bada8e8f0_NEAS.exe"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4384
        • \??\c:\windows\SysWOW64\rundll32.exe
          c:\windows\system32\rundll32.exe "c:\pykvujh\yvfoca.dll",init c:\cntfown.exe
          4⤵
          • Blocklisted process makes network request
          • Loads dropped DLL
          • Adds Run key to start application
          • Enumerates connected drives
          • Writes to the Master Boot Record (MBR)
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2848

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\cntfown.exe

          Filesize

          72KB

          MD5

          338db61147fb5eb25b1bff03dda3f919

          SHA1

          a275b42c2f1923c0388df4e4b06efa134beab299

          SHA256

          a026d87923f616312faf43728146907f1cab658dc1f9ac9b417b6dd59fd163c2

          SHA512

          624de74e23d4ef0fd67453ffd15470081d4e6b7a37638ee91f7092ea5171305fe2acc30c1849d4da129d280648a60f7be017faa3f5658e8d6dd324fc5aebf8a9

        • \??\c:\pykvujh\yvfoca.dll

          Filesize

          42KB

          MD5

          36e3fb5964d663272cf1169e1e1ca478

          SHA1

          58115e08b49505bcbbb5c88a28a86222ba18d5d4

          SHA256

          c7c41689de030df0f78f471422fa2a6383b36e77c94e7f6f124a96feb3e27ed7

          SHA512

          daff53b11aa400437a06287707a334a09661c1ef7d0fd8beaf1a874c79c16fe45bd1188343d0623e839d3ead5ea2dd90896e37ccf3b252c7220c74989a9ba442

        • memory/2848-14-0x0000000010000000-0x000000001002E000-memory.dmp

          Filesize

          184KB

        • memory/2848-13-0x0000000010000000-0x000000001002E000-memory.dmp

          Filesize

          184KB

        • memory/2848-15-0x0000000002880000-0x0000000002980000-memory.dmp

          Filesize

          1024KB

        • memory/2848-16-0x0000000010000000-0x000000001002E000-memory.dmp

          Filesize

          184KB

        • memory/2848-17-0x0000000002880000-0x0000000002980000-memory.dmp

          Filesize

          1024KB

        • memory/3116-3-0x0000000000400000-0x0000000000425000-memory.dmp

          Filesize

          148KB

        • memory/3116-1-0x00000000005D0000-0x00000000005D1000-memory.dmp

          Filesize

          4KB

        • memory/3116-0-0x0000000000400000-0x0000000000425000-memory.dmp

          Filesize

          148KB

        • memory/4384-8-0x0000000000A40000-0x0000000000A41000-memory.dmp

          Filesize

          4KB

        • memory/4384-7-0x0000000000400000-0x0000000000425000-memory.dmp

          Filesize

          148KB

        • memory/4384-10-0x0000000000400000-0x0000000000425000-memory.dmp

          Filesize

          148KB