Analysis

  • max time kernel
    129s
  • max time network
    124s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    15/10/2021, 07:21

General

  • Target
    Sales_Receipt 5185.exe
  • Size 376KB
  • Sample211015-h6nrjsafe2
  • SHA256 2e3aeb2d7f925dbb05adf41fb17d47abc66ff3a6328aed8f2d77115900a804fb
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • agenttesla

Credentials
  • Protocol

    smtp

  • Host

    us2.smtp.mailhostbox.com

  • Port

    587

  • Password

    e)cnIdR1

Signatures

  • AgentTesla

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

  • AgentTesla Payload 3 IoCs
  • 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
  • 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 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Sales_Receipt 5185.exe
    "C:\Users\Admin\AppData\Local\Temp\Sales_Receipt 5185.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2068
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\bBArVqlCNNe" /XML "C:\Users\Admin\AppData\Local\Temp\tmp391D.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:580
    • C:\Users\Admin\AppData\Local\Temp\Sales_Receipt 5185.exe
      "C:\Users\Admin\AppData\Local\Temp\Sales_Receipt 5185.exe"
      2⤵
        PID:3976
      • C:\Users\Admin\AppData\Local\Temp\Sales_Receipt 5185.exe
        "C:\Users\Admin\AppData\Local\Temp\Sales_Receipt 5185.exe"
        2⤵
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:1700

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/1700-134-0x00000000062C0000-0x00000000062C1000-memory.dmp

          memory/1700-133-0x0000000005A10000-0x0000000005A11000-memory.dmp

          memory/1700-132-0x0000000005560000-0x0000000005A5E000-memory.dmp

          memory/1700-125-0x0000000000400000-0x000000000043C000-memory.dmp

          memory/2068-119-0x00000000050A0000-0x00000000050A1000-memory.dmp

          memory/2068-123-0x0000000005F20000-0x0000000005F77000-memory.dmp

          memory/2068-122-0x0000000005E80000-0x0000000005E81000-memory.dmp

          memory/2068-121-0x00000000050E0000-0x00000000055DE000-memory.dmp

          memory/2068-120-0x00000000054F0000-0x00000000054F5000-memory.dmp

          memory/2068-115-0x0000000000810000-0x0000000000811000-memory.dmp

          memory/2068-118-0x00000000050E0000-0x00000000050E1000-memory.dmp

          memory/2068-117-0x00000000055E0000-0x00000000055E1000-memory.dmp