Technical Information
Malicious functions
Executes the following (exploit)
- '<SYSTEM32>\regsvr32.exe' /s calc
- '<SYSTEM32>\regsvr32.exe' C:\Terto\Vtost\Yoense.oooooooccccccccxxxxxxxx
- '<SYSTEM32>\regsvr32.exe' C:\Terto\Vtost\Yoensea.oooooooccccccccxxxxxxxx
- '<SYSTEM32>\regsvr32.exe' C:\Terto\Vtost\Yoenseb.oooooooccccccccxxxxxxxx
Modifies file system
Creates the following files
- %TEMP%\error028520_01.xml
- <Current directory>\5b561000
Substitutes the following files
- <PATH_SAMPLE>.xlsb
Network activity
Connects to
- '5.##6.144.3':80
- '85.#7.9.150':80
- '5.###.247.12':80
TCP
HTTP GET requests
- http://5.###.247.12/44709.4662474537.dat
Miscellaneous
Creates and executes the following
- '<SYSTEM32>\regsvr32.exe' /s calc' (with hidden window)
- '<SYSTEM32>\regsvr32.exe' C:\Terto\Vtost\Yoense.oooooooccccccccxxxxxxxx' (with hidden window)
- '<SYSTEM32>\regsvr32.exe' C:\Terto\Vtost\Yoensea.oooooooccccccccxxxxxxxx' (with hidden window)
- '<SYSTEM32>\regsvr32.exe' C:\Terto\Vtost\Yoenseb.oooooooccccccccxxxxxxxx' (with hidden window)
