Analysis

  • max time kernel
    87s
  • max time network
    6s
  • platform
    windows7_x64
  • resource
    win7
  • submitted
    01/07/2020, 11:34

General

  • Target
    DHL Shipment_Details.exe
  • Size 537KB
  • Sample200701-3f6v281spa
  • SHA256 ce83bccf11e2f79616c5fac945dce6e845aa1a3b7f027cc78f7a46cf7151af13
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • agenttesla

Credentials
  • Protocol

    smtp

  • Host

    mail.mdist.us

  • Port

    587

  • Password

    Receiving#4321

Signatures

  • AgentTesla

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

  • AgentTesla Payload 4 IoCs
  • Drops file in Drivers directory 1 IoCs
  • 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.

  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\DHL Shipment_Details.exe
    "C:\Users\Admin\AppData\Local\Temp\DHL Shipment_Details.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1108
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\KRuDOIFQTers" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8AFF.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1552
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "{path}"
      2⤵
      • Drops file in Drivers directory
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:812
      • C:\Windows\SysWOW64\REG.exe
        REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System / v DisableTaskMgr / t REG_DWORD / d 1 / f
        3⤵
        • Modifies registry key
        PID:1916

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/812-4-0x0000000000400000-0x0000000000450000-memory.dmp

        memory/812-6-0x0000000000400000-0x0000000000450000-memory.dmp

        memory/812-7-0x0000000000400000-0x0000000000450000-memory.dmp