Analysis

  • max time kernel
    151s
  • max time network
    151s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    05/05/2021, 09:07

General

  • Target
    87e44356_by_Libranalysis.exe
  • Size 1.0MB
  • Sample210505-ys55da647x
  • SHA256 a1de40b9a49349b4010ef253917ca7cbeb8cad2789d5cc44fba5b0bf9ee666ee
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Modifies visibility of file extensions in Explorer 2 TTPs
  • UAC bypass 3 TTPs
  • Executes dropped EXE 4 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 5 IoCs
  • Drops file in System32 directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies registry key 1 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\87e44356_by_Libranalysis.exe
    "C:\Users\Admin\AppData\Local\Temp\87e44356_by_Libranalysis.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:852
    • C:\Users\Admin\foIIAAQw\mmMEUgUo.exe
      "C:\Users\Admin\foIIAAQw\mmMEUgUo.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      PID:1648
    • C:\ProgramData\fOossYcM\MQokEEks.exe
      "C:\ProgramData\fOossYcM\MQokEEks.exe"
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Adds Run key to start application
      • Drops file in System32 directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of FindShellTrayWindow
      PID:3276
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\Setup.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:192
      • C:\Users\Admin\AppData\Local\Temp\Setup.exe
        C:\Users\Admin\AppData\Local\Temp\Setup.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetWindowsHookEx
        PID:1312
    • C:\Windows\SysWOW64\reg.exe
      reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v HideFileExt /t REG_DWORD /d 1
      2⤵
      • Modifies registry key
      PID:412
    • C:\Windows\SysWOW64\reg.exe
      reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /d 0 /t REG_DWORD /f
      2⤵
      • Modifies registry key
      PID:1432
    • C:\Windows\SysWOW64\reg.exe
      reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v Hidden /t REG_DWORD /d 2
      2⤵
      • Modifies registry key
      PID:2300
  • C:\ProgramData\vQwkAokI\qMAAooso.exe
    C:\ProgramData\vQwkAokI\qMAAooso.exe
    1⤵
    • Executes dropped EXE
    • Adds Run key to start application
    • Drops file in System32 directory
    PID:2644

Network

        MITRE ATT&CK Enterprise v6

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