Analysis

  • max time kernel
    115s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7
  • submitted
    14/07/2020, 05:44

General

  • Target

    DOCUMENTS.exe

  • Size

    953KB

  • MD5

    49a624292ca84737cc6c1318ba79c37f

  • SHA1

    22dd3f01d20fda38ef2d9baf892837aba7c4ce30

  • SHA256

    f84fb6d4efc2d260e4afc8515a01646621b32a5a8e767d7f0056a3e3f0f9aacb

  • SHA512

    4f841d11bfc3f3e334a0929c7e5eae540d91c65d38ba912e127293d4999c1d34f7ee9caf70f6b7419af28a3c555531da9dab111a8aa2604cfc3f352708e80c5b

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.varda.com.tr
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    varda9997929

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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\DOCUMENTS.exe
    "C:\Users\Admin\AppData\Local\Temp\DOCUMENTS.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1612
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WeLdCbn" /XML "C:\Users\Admin\AppData\Local\Temp\tmpAF51.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1692
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "{path}"
      2⤵
        PID:1780
      • 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:1792
        • 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:1080

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • memory/1792-4-0x0000000000400000-0x0000000000474000-memory.dmp

            Filesize

            464KB

          • memory/1792-6-0x0000000000400000-0x0000000000474000-memory.dmp

            Filesize

            464KB

          • memory/1792-7-0x0000000000400000-0x0000000000474000-memory.dmp

            Filesize

            464KB