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Analysis

  • max time kernel
    102s
  • max time network
    48s
  • platform
    windows7_x64
  • resource
    win7v200430
  • submitted
    09/07/2020, 06:30

General

  • Target

    AWB070820206533.exe

  • Size

    690KB

  • MD5

    3dfec10d4f1fe6f29a6b81c2c6501be2

  • SHA1

    185e5ecf817c7e5c65356b301fb7e23c96567dae

  • SHA256

    510b5fe7628cdd6f15e04907dca1cac201192853e26be4ee279b2d8f90c4e25c

  • SHA512

    f5aa17fdc3eeb5ccad123749a16f94122554cb1c1d5207c5e8a75363f34991831483b13f4f31b34d111bdce49535dc4a6703e3ee2d9198cc3721322b08e4b107

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.ashpraskills.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    TC041018$4321

Signatures

  • AgentTesla

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

  • AgentTesla Payload 4 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 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 2 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.

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\AWB070820206533.exe
    "C:\Users\Admin\AppData\Local\Temp\AWB070820206533.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1500
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v neme /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\Desktop\.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1020
      • C:\Windows\SysWOW64\reg.exe
        REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v neme /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\Desktop\.exe"
        3⤵
        • Adds Run key to start application
        PID:1064
    • C:\Users\Admin\Desktop\.exe
      "C:\Users\Admin\Desktop\.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1864
      • C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
        "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:1596

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1596-14-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/1596-17-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/1596-18-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB