Analysis

  • max time kernel
    150s
  • max time network
    120s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    30/08/2020, 06:35

General

  • Target
    Limp-Trades_Payment_Remittance_26_August_2020_Signed_pdf.exe
  • Size 1.3MB
  • Sample200830-aglgefes8e
  • SHA256 b553eccde98f7d193d5518a765c8a22eb65dd5f29026c96045892c47525536de
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • azorult

C2
  • https://n.nerdpol.ovh/d36ls5q/index.php

Signatures

  • Azorult

    An information stealer that was first discovered in 2016, targeting browsing history and passwords.

  • ModiLoader, DBatLoader

    ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.

  • ModiLoader First Stage 1 IoCs
  • ModiLoader Second Stage 1 IoCs
  • Loads dropped DLL 4 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 1 IoCs
  • JavaScript code in executable 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Modifies data under HKEY_USERS 5 IoCs
  • Modifies registry key 1 TTPs 3 IoCs
  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 500 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Limp-Trades_Payment_Remittance_26_August_2020_Signed_pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Limp-Trades_Payment_Remittance_26_August_2020_Signed_pdf.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1536
    • C:\Windows\SysWOW64\Notepad.exe
      "C:\Windows\System32\Notepad.exe"
      2⤵
        PID:1816
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c C:\Users\Public\Natso.bat
          3⤵
            PID:4384
            • C:\Windows\SysWOW64\reg.exe
              reg delete hkcu\Environment /v windir /f
              4⤵
              • Modifies registry key
              PID:4456
            • C:\Windows\SysWOW64\reg.exe
              reg add hkcu\Environment /v windir /d "cmd /c start /min C:\Users\Public\x.bat reg delete hkcu\Environment /v windir /f && REM "
              4⤵
              • Modifies registry key
              PID:4488
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /Run /TN \Microsoft\Windows\DiskCleanup\SilentCleanup /I
              4⤵
                PID:4556
              • C:\Windows\SysWOW64\reg.exe
                reg delete hkcu\Environment /v windir /f
                4⤵
                • Modifies registry key
                PID:4576
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\system32\cmd.exe /c C:\Users\Public\Natso.bat
              3⤵
                PID:4608
            • C:\Program Files (x86)\internet explorer\ieinstal.exe
              "C:\Program Files (x86)\internet explorer\ieinstal.exe"
              2⤵
              • Loads dropped DLL
              PID:4416
          • C:\Windows\system32\svchost.exe
            C:\Windows\system32\svchost.exe -k LocalService -s WinHttpAutoProxySvc
            1⤵
            • Drops file in Windows directory
            • Modifies data under HKEY_USERS
            • Suspicious use of AdjustPrivilegeToken
            PID:3916

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                memory/1536-0-0x0000000004700000-0x0000000004786000-memory.dmp

                memory/1536-9-0x0000000004BA0000-0x0000000004BF1000-memory.dmp

                memory/1536-250-0x0000000050480000-0x000000005049A000-memory.dmp

                memory/1816-12-0x0000000000C80000-0x0000000000C81000-memory.dmp

                memory/1816-251-0x00000000065A0000-0x00000000065A1000-memory.dmp

                memory/1816-10-0x00000000009C0000-0x00000000009C1000-memory.dmp

                memory/4416-258-0x0000000000400000-0x0000000000420000-memory.dmp

                memory/4416-254-0x0000000000400000-0x0000000000420000-memory.dmp