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Analysis

  • max time kernel
    177s
  • max time network
    189s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/12/2023, 13:36

General

  • Target

    1a365b3dd9a3b049814b3e4ad813c4d8.exe

  • Size

    1.6MB

  • MD5

    1a365b3dd9a3b049814b3e4ad813c4d8

  • SHA1

    4eed488cb6e8d66dbffd3eb6481e91de9830025c

  • SHA256

    3311fbb32acf6d00f0998e557f0a6ef7c1586232586a9069601db9ad72e7d59f

  • SHA512

    63d655bdda4fe599b1d24b35b448039db872e323caff112203b35614068cd2f77aeac16cadfbb1cfa1ad221c270434bcd39f2608e59ec4b1241099f1ad8c4f67

  • SSDEEP

    12288:blIX21g+kD1t5m1HX71j2TzgNOe099zUdcVlNPu90eDDJph:u5+kRt5mVXBczgNP099zUa1K0Sh

Score
10/10

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Adds policy Run key to start application 2 TTPs 4 IoCs
  • Modifies Installed Components in the registry 2 TTPs 5 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 3 IoCs
  • Modifies WinLogon 2 TTPs 2 IoCs
  • Drops file in System32 directory 8 IoCs
  • Drops file in Windows directory 8 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1a365b3dd9a3b049814b3e4ad813c4d8.exe
    "C:\Users\Admin\AppData\Local\Temp\1a365b3dd9a3b049814b3e4ad813c4d8.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Adds policy Run key to start application
    • Modifies Installed Components in the registry
    • Modifies WinLogon
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:3500
    • C:\Windows\SysWOW64\fservice.exe
      C:\Windows\system32\fservice.exe
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Drops file in Windows directory
      • Suspicious use of WriteProcessMemory
      PID:4852
      • C:\Windows\services.exe
        C:\Windows\services.exe -XP
        3⤵
        • Modifies WinLogon for persistence
        • Adds policy Run key to start application
        • Modifies Installed Components in the registry
        • Executes dropped EXE
        • Loads dropped DLL
        • Modifies WinLogon
        • Drops file in System32 directory
        • Drops file in Windows directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2796
        • C:\Windows\SysWOW64\NET.exe
          NET STOP srservice
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1900
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 STOP srservice
            5⤵
              PID:624
          • C:\Windows\SysWOW64\NET.exe
            NET STOP navapsvc
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:1808
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 STOP navapsvc
              5⤵
                PID:4968

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Windows\SysWOW64\fservice.exe

        Filesize

        1.6MB

        MD5

        1a365b3dd9a3b049814b3e4ad813c4d8

        SHA1

        4eed488cb6e8d66dbffd3eb6481e91de9830025c

        SHA256

        3311fbb32acf6d00f0998e557f0a6ef7c1586232586a9069601db9ad72e7d59f

        SHA512

        63d655bdda4fe599b1d24b35b448039db872e323caff112203b35614068cd2f77aeac16cadfbb1cfa1ad221c270434bcd39f2608e59ec4b1241099f1ad8c4f67

      • C:\Windows\SysWOW64\reginv.dll

        Filesize

        36KB

        MD5

        d4a3f90e159ffbcbc4f9740de4b7f171

        SHA1

        0542f5d1e2c23dca8d90766b3a8537dc3880e5c9

        SHA256

        2200dd5f83d2fb8c5d3994206a4fa9ff34b4cbfe56ed39a9a03c954cf45d8f77

        SHA512

        5493beb50b5f7d8ec52f32718d01696916ae173456005d0c1294ce695161ce5004aff58ee3892bf5db0f9b23720146a6d3ae8ffbcbbd81f84d894fdc8cf75a94

      • C:\Windows\SysWOW64\winkey.dll

        Filesize

        24KB

        MD5

        43e7d9b875c921ba6be38d45540fb9dd

        SHA1

        f22a73fc0d4aa3ea6c0b8f61d974b028f308acc4

        SHA256

        f1b2b0abe844e6ba812c7f8709a463a7f6c56fa6ac38d376a0739cc3469f795b

        SHA512

        2e74e23c0875b69b82319391c392132f28f4eb45aa412805130382498ae48969a06a2b3a7528b626fa7d7ddb6b006f19f0ef8d73cf73cb9a0c0df44a21077622

      • memory/2796-31-0x00000000041E0000-0x00000000041E1000-memory.dmp

        Filesize

        4KB

      • memory/2796-47-0x00000000041E0000-0x00000000041E1000-memory.dmp

        Filesize

        4KB

      • memory/2796-53-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/2796-52-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/2796-51-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/2796-50-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/2796-49-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/2796-48-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/2796-27-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/2796-46-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/2796-45-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/2796-35-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/2796-44-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/3500-1-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/3500-2-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/3500-0-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/3500-6-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/3500-15-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/3500-3-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/3500-7-0x0000000002410000-0x0000000002411000-memory.dmp

        Filesize

        4KB

      • memory/4852-26-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB

      • memory/4852-17-0x0000000003F40000-0x0000000003F41000-memory.dmp

        Filesize

        4KB

      • memory/4852-16-0x0000000000400000-0x0000000000617000-memory.dmp

        Filesize

        2.1MB