Analysis

  • max time kernel
    60s
  • max time network
    105s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    09/11/2020, 20:39

General

  • Target
    E.T.A Shpmts_xlsx.exe
  • Size 333KB
  • Sample201109-acc5k5h9cs
  • SHA256 e4c807505f6c4a6c8369f3e78dc51a7bb5e6969803fc2ee9f992fe623b8a1dd6
  • MD5 SHA1 SHA512

Malware Config

Extracted

Credentials
  • Protocol

    smtp

  • Host

    mail.nabf.com.au

  • Port

    587

  • Password

    r%cd3=De!F8)?Q.VuK

Signatures

  • AgentTesla

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

  • AgentTesla Payload 2 IoCs
  • 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.

  • 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 SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\E.T.A Shpmts_xlsx.exe
    "C:\Users\Admin\AppData\Local\Temp\E.T.A Shpmts_xlsx.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1192
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OziBuI" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6305.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:636
    • C:\Users\Admin\AppData\Local\Temp\E.T.A Shpmts_xlsx.exe
      "C:\Users\Admin\AppData\Local\Temp\E.T.A Shpmts_xlsx.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:4072

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/4072-2-0x0000000000400000-0x000000000044C000-memory.dmp