Analysis

  • max time kernel
    77s
  • max time network
    83s
  • platform
    windows7_x64
  • resource
    win7
  • submitted
    28/08/2020, 14:02

General

  • Target
    ARRIVAL NOTICE & INVOICE.exe
  • Size 896KB
  • Sample200828-gem4fdv1as
  • SHA256 2391c9beb21916a6b7f18cd2dadf9f9c19a060b75791f6052e65a683161d7a60
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • agenttesla

Credentials
  • Protocol

    smtp

  • Host

    us2.smtp.mailhostbox.com

  • Port

    587

  • Password

    stanstan22

Signatures

  • AgentTesla

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

  • AgentTesla Payload 4 IoCs
  • Loads dropped DLL 1 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.

  • NTFS ADS 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ARRIVAL NOTICE & INVOICE.exe
    "C:\Users\Admin\AppData\Local\Temp\ARRIVAL NOTICE & INVOICE.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1496
    • C:\Users\Admin\AppData\Local\Temp\ARRIVAL NOTICE & INVOICE.exe
      "C:/Users/Admin/AppData/Local/Temp/ARRIVAL NOTICE & INVOICE.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1844
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c copy "C:/Users/Admin/AppData/Local/Temp/ARRIVAL NOTICE & INVOICE.exe" "%temp%\FolderN\name.exe" /Y
      2⤵
        PID:1988
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v Load /t REG_SZ /d "%temp%\FolderN\name.exe.lnk" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2036
        • C:\Windows\SysWOW64\reg.exe
          reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v Load /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\FolderN\name.exe.lnk" /f
          3⤵
            PID:2000
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c echo [zoneTransfer]ZoneID = 2 > %temp%\FolderN\name.exe:Zone.Identifier
          2⤵
          • NTFS ADS
          PID:1412

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            memory/1496-0-0x0000000073B80000-0x000000007426E000-memory.dmp

            memory/1496-1-0x0000000001050000-0x0000000001051000-memory.dmp

            memory/1496-3-0x0000000000680000-0x00000000006DB000-memory.dmp

            memory/1844-7-0x0000000000400000-0x0000000000458000-memory.dmp

            memory/1844-8-0x0000000073B80000-0x000000007426E000-memory.dmp

            memory/1844-6-0x0000000000400000-0x0000000000458000-memory.dmp

            memory/1844-4-0x0000000000400000-0x0000000000458000-memory.dmp