Analysis

  • max time kernel
    133s
  • max time network
    137s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    14/03/2022, 06:09

General

  • Target
    Read Message Delivery Failure Text.exe
  • Size 607KB
  • Sample220314-gwgd2sffdk
  • SHA256 f403d42973ac773f89be5f033e0ab6268e0078dda5dca6301ccd4924fbe9ec76
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Read Message Delivery Failure Text.exe
    "C:\Users\Admin\AppData\Local\Temp\Read Message Delivery Failure Text.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: RenamesItself
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:488
    • C:\Users\Admin\AppData\Local\Temp\2.exe
      "C:\Users\Admin\AppData\Local\Temp\2.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2800
      • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
        "C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
        3⤵
        • Executes dropped EXE
        • Accesses Microsoft Outlook profiles
        • Adds Run key to start application
        • Modifies system certificate store
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:1332

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/488-131-0x0000000005D00000-0x00000000062A4000-memory.dmp

        memory/488-132-0x0000000075370000-0x0000000075B20000-memory.dmp

        memory/488-133-0x00000000057F0000-0x000000000588C000-memory.dmp

        memory/488-134-0x00000000062B0000-0x0000000006342000-memory.dmp

        memory/488-135-0x0000000005750000-0x0000000005CF4000-memory.dmp

        memory/488-136-0x0000000003190000-0x000000000319A000-memory.dmp

        memory/488-137-0x000000000A100000-0x000000000A62C000-memory.dmp

        memory/488-130-0x0000000000D80000-0x0000000000E1E000-memory.dmp

        memory/1332-146-0x0000000075370000-0x0000000075B20000-memory.dmp

        memory/1332-145-0x00000000001B0000-0x00000000001EA000-memory.dmp

        memory/1332-147-0x0000000004930000-0x0000000004ED4000-memory.dmp

        memory/1332-148-0x0000000005660000-0x00000000056C6000-memory.dmp

        memory/1332-149-0x0000000005C00000-0x0000000005C50000-memory.dmp

        memory/1332-150-0x0000000004930000-0x0000000004ED4000-memory.dmp

        memory/2800-141-0x0000000007410000-0x0000000007432000-memory.dmp

        memory/2800-140-0x0000000005010000-0x00000000055B4000-memory.dmp

        memory/2800-139-0x0000000005010000-0x00000000055B4000-memory.dmp

        memory/2800-138-0x0000000075370000-0x0000000075B20000-memory.dmp