Analysis

  • max time kernel
    97s
  • max time network
    73s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    09/11/2020, 19:49

General

  • Target
    Sample#4078534.Scan..exe
  • Size 569KB
  • Sample201109-nr9em2ebca
  • SHA256 32b3caca6ecd61d90d09dec0ca94621e8733723c3df41ea63705b740a298e496
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • agenttesla

Credentials
  • Protocol

    smtp

  • Host

    mail.flavarich.com

  • Port

    587

  • Password

    ume123fla@@22

Signatures

  • AgentTesla

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

  • AgentTesla Payload 4 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.

  • 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Sample#4078534.Scan..exe
    "C:\Users\Admin\AppData\Local\Temp\Sample#4078534.Scan..exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1816
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\wkosNW" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1A54.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1700
    • C:\Users\Admin\AppData\Local\Temp\Sample#4078534.Scan..exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1432

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1432-2-0x0000000000400000-0x0000000000450000-memory.dmp

        memory/1432-4-0x0000000000400000-0x0000000000450000-memory.dmp

        memory/1432-5-0x0000000000400000-0x0000000000450000-memory.dmp