Resubmissions

30/07/2024, 12:17

240730-pgdcvasfjf10

30/07/2024, 12:17

240730-pf9dwssfjb7

30/07/2024, 09:41

240730-lnrl9szhjf10

Analysis

  • max time kernel
    51s
  • max time network
    55s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240729-en
  • resource tags

    arch:x64arch:x86image:win11-20240729-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    30/07/2024, 12:17

General

  • Target
    Chrome.exe
  • Size 4.6MB
  • Sample240730-pgdcvasfjf
  • SHA256 a58b7bd1380f220770408e33f43bdac4ab0bfe336e101484100915bf0518e794
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • FatalRat

    FatalRat is a modular infostealer family written in C++ first appearing in June 2021.

  • Fatal Rat payload 1 IoCs
  • ASPack v2.12-2.42 1 IoCs

    Detects executables packed with ASPack v2.12-2.42

  • Executes dropped EXE 5 IoCs
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Chrome.exe
    "C:\Users\Admin\AppData\Local\Temp\Chrome.exe"
    1⤵
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3104
    • C:\Program Files (x86)\uzj.exe
      "C:\Program Files (x86)\uzj.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4572
      • C:\Users\Public\Documents\sougou\PTvrst.exe
        C:\Users\Public\Documents\sougou\PTvrst.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2600
        • C:\Users\Public\Documents\sougou\spolsvt.exe
          C:\Users\Public\Documents\sougou\spolsvt.exe
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:356
          • C:\Users\Public\Documents\dd\spolsvt.exe
            C:\Users\Public\Documents\dd\spolsvt.exe
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:2440
          • C:\Users\Public\Documents\uu\svcoth.exe
            C:\Users\Public\Documents\uu\svcoth.exe
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            PID:4000
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\7ZSfx000.cmd" "
      2⤵
      • System Location Discovery: System Language Discovery
      PID:644

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        uzj.exe

        • Path C:\Program Files (x86)\uzj.exe
        • Size 3.4MB
        • SHA256 033f23eac17d2a06675459abe2ded52b42f29cfa720c2ccfb507bac2d38988f0
        • MD5 SHA1 SHA512 SSDEEP

        7ZSfx000.cmd

        • Path C:\Users\Admin\AppData\Local\Temp\7ZSfx000.cmd
        • Size 184B
        • SHA256 b579bef02bd91e9b29bcad36144ba04588585614bfcef60c6feb67bf4982b185
        • MD5 SHA1 SHA512

        spolsvt.exe

        • Path C:\Users\Public\Documents\dd\spolsvt.exe
        • Size 16KB
        • SHA256 b29e48102ecb3d3614e8980a8b8cc63dd2b993c6346f466479244ec2b47b69d8
        • MD5 SHA1 SHA512 SSDEEP

        Mpec.mbt

        • Path C:\Users\Public\Documents\sougou\Mpec.mbt
        • Size 196KB
        • SHA256 48b700a1c7f950271a2c7a0ef9a3503c50221d7703f7e07b6d2997ae2f67c81c
        • MD5 SHA1 SHA512 SSDEEP

        spolsvt.exe

        • Path C:\Users\Public\Documents\sougou\spolsvt.exe
        • Size 9KB
        • SHA256 20e3dc90a3e83b6202e2a7f4603b60e5e859639cb68693426c400b13aaeabd78
        • MD5 SHA1 SHA512 SSDEEP

        memory/356-40-0x0000000000400000-0x0000000000441000-memory.dmp

        memory/356-41-0x0000000000400000-0x0000000000441000-memory.dmp

        memory/356-45-0x0000000000400000-0x0000000000441000-memory.dmp

        memory/356-39-0x0000000000400000-0x0000000000441000-memory.dmp

        memory/2440-54-0x0000000000400000-0x0000000000430000-memory.dmp

        memory/2440-59-0x0000000000400000-0x0000000000430000-memory.dmp

        memory/2440-53-0x0000000000400000-0x0000000000430000-memory.dmp

        memory/2440-55-0x0000000000400000-0x0000000000430000-memory.dmp

        memory/2440-60-0x0000000010000000-0x000000001002A000-memory.dmp

        memory/2600-34-0x0000000000400000-0x0000000000A13000-memory.dmp

        memory/2600-33-0x0000000000400000-0x0000000000A13000-memory.dmp

        memory/2600-35-0x0000000000400000-0x0000000000A13000-memory.dmp

        memory/2600-48-0x0000000000400000-0x0000000000A13000-memory.dmp

        memory/2600-36-0x0000000000400000-0x0000000000A13000-memory.dmp

        memory/3104-71-0x0000000000400000-0x000000000042D000-memory.dmp

        memory/3104-0-0x0000000000400000-0x000000000042D000-memory.dmp

        memory/4000-80-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/4000-77-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/4000-78-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/4000-79-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/4000-81-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/4000-85-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/4572-17-0x0000000000400000-0x0000000000A13000-memory.dmp

        memory/4572-15-0x0000000000400000-0x0000000000A13000-memory.dmp

        memory/4572-16-0x0000000000400000-0x0000000000A13000-memory.dmp

        memory/4572-19-0x0000000000401000-0x00000000004C4000-memory.dmp

        memory/4572-18-0x0000000000400000-0x0000000000A13000-memory.dmp

        memory/4572-51-0x0000000000400000-0x0000000000A13000-memory.dmp