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Analysis

  • max time kernel
    99s
  • max time network
    118s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/02/2023, 08:56

General

  • Target

    Credit Note.pdf.exe

  • Size

    567KB

  • MD5

    75e1d17c8431d6b7d840fcdfe0dd9a2d

  • SHA1

    3a71b6a0b1e6bdfbe6b3ed9624f17f504072f068

  • SHA256

    efa920373efaa4bd26fb1704e6ea6cb05ed8e91b5e552db7ff2a7764ace07758

  • SHA512

    f6e9ed253e735bfd95392914d33eacd0c70057e1335b6f2564ba7d40455bec2249bb842042b866bf35c9364383ea8882adb20cd1d26f780e08dfb35d88bc9777

  • SSDEEP

    12288:9cBXiEZz7yDne7f4WYMTyPdLX2tuCAe/ZXazVt1Ek6ugpRZN7gNFSxCDH:uRJe7MTyPdLX2tuCAe/ZXazSkKacxC

Malware Config

Extracted

Family

agenttesla

Credentials

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Credit Note.pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Credit Note.pdf.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3624
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TZiqjCD" /XML "C:\Users\Admin\AppData\Local\Temp\tmpED24.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:4876
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "{path}"
      2⤵
        PID:1460
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        "{path}"
        2⤵
          PID:2544
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
          "{path}"
          2⤵
          • Accesses Microsoft Outlook profiles
          • Adds Run key to start application
          • Suspicious use of AdjustPrivilegeToken
          • outlook_office_path
          • outlook_win_path
          PID:1912

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\tmpED24.tmp

        Filesize

        1KB

        MD5

        03cc8b77eeaf377a5ab3a465d47cb9c0

        SHA1

        7c930db5ea7e398f1ae5c2e4deda8d42466ddc36

        SHA256

        a04cfd4ca1bb23a6b4a5ff5d9101ca60b46db2137df8ce7f993e2ddefc29f7d1

        SHA512

        53abf6c08bb02249e72b61c51df9e8612add3750dcc9692cb9559baab44e7f402ad2ca677a3f22b9e0e64defa163278f89d1467294dbe2c1aaee88e92b5ea774

      • memory/1912-142-0x0000000000400000-0x0000000000430000-memory.dmp

        Filesize

        192KB

      • memory/1912-143-0x0000000005270000-0x00000000052D6000-memory.dmp

        Filesize

        408KB

      • memory/1912-144-0x0000000006520000-0x0000000006570000-memory.dmp

        Filesize

        320KB

      • memory/1912-145-0x00000000068A0000-0x0000000006A62000-memory.dmp

        Filesize

        1.8MB

      • memory/3624-135-0x0000000004CC0000-0x0000000004D5C000-memory.dmp

        Filesize

        624KB

      • memory/3624-136-0x00000000027C0000-0x00000000027CA000-memory.dmp

        Filesize

        40KB

      • memory/3624-134-0x0000000004BC0000-0x0000000004C52000-memory.dmp

        Filesize

        584KB

      • memory/3624-133-0x0000000005270000-0x0000000005814000-memory.dmp

        Filesize

        5.6MB

      • memory/3624-132-0x0000000000220000-0x00000000002B4000-memory.dmp

        Filesize

        592KB