Technical Information
To ensure autorun and distribution
Creates or modifies the following files
- <SYSTEM32>\tasks\runtimebroker
Modifies file system
Creates the following files
- %TEMP%\_mei34002\vcruntime140.dll
- %TEMP%\_mei34002\_bz2.pyd
- %TEMP%\_mei34002\_decimal.pyd
- %TEMP%\_mei34002\_hashlib.pyd
- %TEMP%\_mei34002\_lzma.pyd
- %TEMP%\_mei34002\_socket.pyd
- %TEMP%\_mei34002\api-ms-win-core-console-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-datetime-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-debug-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-errorhandling-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-fibers-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-file-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-file-l1-2-0.dll
- %TEMP%\_mei34002\api-ms-win-core-file-l2-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-handle-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-heap-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-interlocked-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-libraryloader-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-localization-l1-2-0.dll
- %TEMP%\_mei34002\api-ms-win-core-memory-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-namedpipe-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-processenvironment-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-processthreads-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-processthreads-l1-1-1.dll
- %TEMP%\_mei34002\api-ms-win-core-profile-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-rtlsupport-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-string-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-synch-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-synch-l1-2-0.dll
- %TEMP%\_mei34002\api-ms-win-core-sysinfo-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-timezone-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-util-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-conio-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-convert-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-environment-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-filesystem-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-heap-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-locale-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-math-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-process-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-runtime-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-stdio-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-string-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-time-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-utility-l1-1-0.dll
- %TEMP%\_mei34002\base_library.zip
- %TEMP%\_mei34002\libcrypto-3.dll
- %TEMP%\_mei34002\python313.dll
- %TEMP%\_mei34002\select.pyd
- %TEMP%\_mei34002\ucrtbase.dll
- %TEMP%\_mei34002\unicodedata.pyd
- %TEMP%\b9qk3r8o
- %TEMP%\tmpb95wb5c_.exe
- %APPDATA%\.runtime\runtimebroker.exe
- %LOCALAPPDATA%\microsoft\clr_v4.0\usagelogs\tmpb95wb5c_.exe.log
- %TEMP%\j74vjbsqvzuh.bat
- %LOCALAPPDATA%\microsoft\clr_v4.0\usagelogs\runtimebroker.exe.log
- nul
- %TEMP%\srpuhev8rlhq.bat
- %TEMP%\rwdcwajqc6it.bat
- %TEMP%\izo0sujwrzan.bat
- %TEMP%\b7jm1iffzvap.bat
- %TEMP%\u7ywm3vnqtz4.bat
Sets the 'hidden' attribute to the following files
- %APPDATA%\.runtime\runtimebroker.exe
Deletes following files that it created itself
- %TEMP%\b9qk3r8o
- %TEMP%\tmpb95wb5c_.exe
- %TEMP%\_mei34002\api-ms-win-core-console-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-datetime-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-debug-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-errorhandling-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-fibers-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-file-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-file-l1-2-0.dll
- %TEMP%\_mei34002\api-ms-win-core-file-l2-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-handle-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-heap-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-interlocked-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-libraryloader-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-localization-l1-2-0.dll
- %TEMP%\_mei34002\api-ms-win-core-memory-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-namedpipe-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-processenvironment-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-processthreads-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-processthreads-l1-1-1.dll
- %TEMP%\_mei34002\api-ms-win-core-profile-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-rtlsupport-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-string-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-synch-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-synch-l1-2-0.dll
- %TEMP%\_mei34002\api-ms-win-core-sysinfo-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-timezone-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-core-util-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-conio-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-convert-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-environment-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-filesystem-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-heap-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-locale-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-math-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-process-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-runtime-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-stdio-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-string-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-time-l1-1-0.dll
- %TEMP%\_mei34002\api-ms-win-crt-utility-l1-1-0.dll
- %TEMP%\_mei34002\base_library.zip
- %TEMP%\_mei34002\libcrypto-3.dll
- %TEMP%\_mei34002\python313.dll
- %TEMP%\_mei34002\select.pyd
- %TEMP%\_mei34002\ucrtbase.dll
- %TEMP%\_mei34002\unicodedata.pyd
- %TEMP%\_mei34002\vcruntime140.dll
- %TEMP%\_mei34002\_bz2.pyd
- %TEMP%\_mei34002\_decimal.pyd
- %TEMP%\_mei34002\_hashlib.pyd
- %TEMP%\_mei34002\_lzma.pyd
- %TEMP%\_mei34002\_socket.pyd
Network activity
UDP
- DNS ASK us######9-21690.portmap.io
Miscellaneous
Creates and executes the following
- '%TEMP%\tmpb95wb5c_.exe'
- '%APPDATA%\.runtime\runtimebroker.exe'
Restarts the analyzed sample
Executes the following
- '<SYSTEM32>\cmd.exe' /c "%TEMP%\tmpb95wb5c_.exe"
- '<SYSTEM32>\schtasks.exe' /create /tn "RuntimeBroker" /sc ONLOGON /tr "%APPDATA%\.runtime\RuntimeBroker.exe" /rl HIGHEST /f
- '<SYSTEM32>\cmd.exe' /c ""%TEMP%\j74vjBSqVzuh.bat" "
- '<SYSTEM32>\chcp.com' 65001
- '<SYSTEM32>\ping.exe' -n 10 localhost
- '<SYSTEM32>\cmd.exe' /c ""%TEMP%\SRpuHeV8rlhQ.bat" "
- '<SYSTEM32>\cmd.exe' /c ""%TEMP%\rwdCwajQC6iT.bat" "
- '<SYSTEM32>\cmd.exe' /c ""%TEMP%\IzO0SuJWrzaN.bat" "
- '<SYSTEM32>\cmd.exe' /c ""%TEMP%\B7JM1IffzVAP.bat" "
- '<SYSTEM32>\cmd.exe' /c ""%TEMP%\U7yWm3vnQTz4.bat" "
- '<SYSTEM32>\cmd.exe' /c ""%TEMP%\mRj15NglcrFh.bat" "
- '<SYSTEM32>\cmd.exe' /c "%TEMP%\tmpb95wb5c_.exe"' (with hidden window)
- '<SYSTEM32>\cmd.exe' /c ""%TEMP%\j74vjBSqVzuh.bat" "' (with hidden window)
- '<SYSTEM32>\cmd.exe' /c ""%TEMP%\SRpuHeV8rlhQ.bat" "' (with hidden window)
- '<SYSTEM32>\cmd.exe' /c ""%TEMP%\rwdCwajQC6iT.bat" "' (with hidden window)
- '<SYSTEM32>\cmd.exe' /c ""%TEMP%\IzO0SuJWrzaN.bat" "' (with hidden window)
- '<SYSTEM32>\cmd.exe' /c ""%TEMP%\B7JM1IffzVAP.bat" "' (with hidden window)
- '<SYSTEM32>\cmd.exe' /c ""%TEMP%\U7yWm3vnQTz4.bat" "' (with hidden window)
- '<SYSTEM32>\cmd.exe' /c ""%TEMP%\mRj15NglcrFh.bat" "' (with hidden window)
