Analysis

  • max time kernel
    139s
  • max time network
    48s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    23/07/2021, 17:15

General

  • Target
    7bfe716bc6d8c39636fbde3c5f0cd75c.exe
  • Size 507KB
  • Sample210723-e722rnfcga
  • SHA256 98c1ad1d20f0e66299a17c1eb48b23ea1bbd40c056a0df091fd59181d1da013e
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • agenttesla

Credentials
  • Protocol

    smtp

  • Host

    mail.spamora.net

  • Port

    587

  • Password

    Emotion22

Signatures

  • AgentTesla

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

  • AgentTesla Payload 3 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.

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\7bfe716bc6d8c39636fbde3c5f0cd75c.exe
    "C:\Users\Admin\AppData\Local\Temp\7bfe716bc6d8c39636fbde3c5f0cd75c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1948
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\SajFuIjFg" /XML "C:\Users\Admin\AppData\Local\Temp\tmp500.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1336
    • C:\Users\Admin\AppData\Local\Temp\7bfe716bc6d8c39636fbde3c5f0cd75c.exe
      "{path}"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1692

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1692-74-0x0000000004CD1000-0x0000000004CD2000-memory.dmp

        memory/1692-73-0x0000000004CD0000-0x0000000004CD1000-memory.dmp

        memory/1692-71-0x0000000000400000-0x000000000043C000-memory.dmp

        memory/1692-69-0x0000000000400000-0x000000000043C000-memory.dmp

        memory/1948-63-0x00000000003A0000-0x00000000003A2000-memory.dmp

        memory/1948-66-0x0000000001EB0000-0x0000000001EF4000-memory.dmp

        memory/1948-65-0x0000000005FF0000-0x0000000006072000-memory.dmp

        memory/1948-64-0x0000000004A35000-0x0000000004A46000-memory.dmp

        memory/1948-59-0x00000000105E0000-0x00000000105E1000-memory.dmp

        memory/1948-62-0x0000000004A30000-0x0000000004A31000-memory.dmp

        memory/1948-61-0x0000000002000000-0x000000000205E000-memory.dmp