Analysis

  • max time kernel
    120s
  • max time network
    95s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/01/2025, 17:33

General

  • Target
    df90c7882198365af165f71ffb0c1f1a8300adca4a04e3e8fa2746f98ba600f6N.exe
  • Size 769KB
  • Sample250120-v5cdca1jfp
  • SHA256 df90c7882198365af165f71ffb0c1f1a8300adca4a04e3e8fa2746f98ba600f6
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Credentials
  • Protocol

    smtp

  • Host

    smtp.yandex.com

  • Port

    587

  • Password

    Boy12345#

Signatures

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 3 IoCs
  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 3 TTPs

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

  • Unsecured Credentials: Credentials In Files 1 TTPs

    Steal credentials from unsecured files.

  • Accesses Microsoft Outlook profiles 1 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\df90c7882198365af165f71ffb0c1f1a8300adca4a04e3e8fa2746f98ba600f6N.exe
    "C:\Users\Admin\AppData\Local\Temp\df90c7882198365af165f71ffb0c1f1a8300adca4a04e3e8fa2746f98ba600f6N.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3952
    • C:\Users\Admin\AppData\Roaming\app.exe
      "C:\Users\Admin\AppData\Roaming\app.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:444
      • C:\Users\Admin\AppData\Roaming\app.exe
        "C:\Users\Admin\AppData\Roaming\app.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2064
      • C:\Users\Admin\AppData\Roaming\My.RawFile.exe
        "C:\Users\Admin\AppData\Roaming\My.RawFile.exe"
        3⤵
        • Executes dropped EXE
        • Accesses Microsoft Outlook profiles
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • outlook_office_path
        • outlook_win_path
        PID:4608
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\aspnet_compiler.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\aspnet_compiler.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        PID:4892
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\aspnet_compiler.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\aspnet_compiler.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        PID:3176

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        aspnet_compiler.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\aspnet_compiler.exe.log
        • Size 20B
        • SHA256 7a23c6e7ccd8811ecdf038d3a89d5c7d68ed37324bae2d4954125d9128fa9432
        • MD5 SHA1 SHA512

        My.RawFile.exe

        • Path C:\Users\Admin\AppData\Roaming\My.RawFile.exe
        • Size 142KB
        • SHA256 a80c77ca694eca3f6629c54572aba811e64b61975c5db2ff38c8d662d12b1ce7
        • MD5 SHA1 SHA512 SSDEEP

        app.exe

        • Path C:\Users\Admin\AppData\Roaming\app.exe
        • Size 778KB
        • SHA256 e8de4f80df866617be4fcc6369cea14a200793538bffee950a1b42cd79508036
        • MD5 SHA1 SHA512 SSDEEP

        memory/444-31-0x0000000075180000-0x0000000075731000-memory.dmp

        memory/444-56-0x0000000075180000-0x0000000075731000-memory.dmp

        memory/444-38-0x0000000075180000-0x0000000075731000-memory.dmp

        memory/444-33-0x0000000075180000-0x0000000075731000-memory.dmp

        memory/444-32-0x0000000075180000-0x0000000075731000-memory.dmp

        memory/444-30-0x0000000075180000-0x0000000075731000-memory.dmp

        memory/2064-36-0x0000000075180000-0x0000000075731000-memory.dmp

        memory/2064-35-0x0000000075180000-0x0000000075731000-memory.dmp

        memory/2064-59-0x0000000075180000-0x0000000075731000-memory.dmp

        memory/3176-53-0x0000000000400000-0x0000000000410000-memory.dmp

        memory/3952-29-0x0000000075180000-0x0000000075731000-memory.dmp

        memory/3952-18-0x0000000075180000-0x0000000075731000-memory.dmp

        memory/3952-17-0x0000000075180000-0x0000000075731000-memory.dmp

        memory/3952-16-0x0000000075182000-0x0000000075183000-memory.dmp

        memory/3952-0-0x0000000075182000-0x0000000075183000-memory.dmp

        memory/3952-4-0x0000000075180000-0x0000000075731000-memory.dmp

        memory/3952-3-0x0000000075180000-0x0000000075731000-memory.dmp

        memory/3952-2-0x0000000075180000-0x0000000075731000-memory.dmp

        memory/3952-1-0x0000000075180000-0x0000000075731000-memory.dmp