Analysis

  • max time kernel
    148s
  • max time network
    147s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    13/07/2020, 06:34

General

  • Target
    Payment doc747322.exe
  • Size 491KB
  • Sample200713-kfehbtr842
  • SHA256 112fe86589f5587620a62be8ebeab2ee9898f770762f7be2b92a229c46d52917
  • MD5 SHA1 SHA512

Malware Config

Extracted

Credentials
  • Protocol

    smtp

  • Host

    mail.privateemail.com

  • Port

    587

  • Password

    killdemall007

Extracted

Family
  • agenttesla

Credentials
  • Protocol

    smtp

  • Host

    mail.privateemail.com

  • Port

    587

  • Password

    killdemall007

Signatures

  • AgentTesla

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

  • AgentTesla Payload 17 IoCs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs
  • Looks for VMWare Tools registry key 2 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • 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.

  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Payment doc747322.exe
    "C:\Users\Admin\AppData\Local\Temp\Payment doc747322.exe"
    1⤵
    • Checks BIOS information in registry
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:792
    • C:\Users\Admin\AppData\Local\Temp\Payment doc747322.exe
      "{path}"
      2⤵
        PID:3868
      • C:\Users\Admin\AppData\Local\Temp\Payment doc747322.exe
        "{path}"
        2⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: RenamesItself
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3896
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
          dw20.exe -x -s 1876
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1172
    • C:\Windows\Microsoft.Net\Framework64\v3.0\WPF\PresentationFontCache.exe
      C:\Windows\Microsoft.Net\Framework64\v3.0\WPF\PresentationFontCache.exe
      1⤵
        PID:2296

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            memory/1172-20-0x0000000002EB0000-0x0000000002EB1000-memory.dmp

            memory/1172-21-0x0000000002A10000-0x0000000002A11000-memory.dmp

            memory/1172-4-0x00000000027A0000-0x00000000027A1000-memory.dmp

            memory/3896-0-0x0000000000400000-0x000000000046E000-memory.dmp