Technical Information
To ensure autorun and distribution
Creates or modifies the following files
- <SYSTEM32>\tasks\zyntqtkb5400
Modifies file system
Creates the following files
- <Current directory>\ty8u1j3.xml
Deletes following files that it created itself
- <Current directory>\ty8u1j3.xml
Substitutes the following executable files
- <Full path to file>
Moves itself
- from <Full path to file> to <Current directory>\old_<File name>.exe
Deletes itself.
Network activity
Connects to
- 'pa###bin.com':443
- 'cu##t.org':443
- 'q.#s':80
- 'pu######r.linkvertise.com':443
TCP
HTTP GET requests
- http://q.#s/EVnYC
- http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?3c##############
- http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?1a##############
Other
- '15#.#01.129.91':443
- 'cu##t.org':443
- 'li###ertise.com':443
UDP
- DNS ASK pa###bin.com
- DNS ASK cu##t.org
- DNS ASK q.#s
- DNS ASK pu######r.linkvertise.com
- DNS ASK li###ertise.com
Miscellaneous
Restarts the analyzed sample
Executes the following
- '%WINDIR%\syswow64\schtasks.exe' /CREATE /RL HIGHEST /SC ONLOGON /TR "<Full path to file>" /TN zYNTQtkB5400 /F
- '%WINDIR%\syswow64\cmd.exe' /c schtasks.exe /Query /XML /TN zYNTQtkB5400 > <Current directory>\tY8u1J3.xml
- '%WINDIR%\syswow64\schtasks.exe' /Query /XML /TN zYNTQtkB5400
