Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /f'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /u'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /a'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /i'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /D'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /H'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /P'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /O'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /c'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /y'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /w'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /Z'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /r'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /v'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /X'
- [<HKLM>\SYSTEM\ControlSet001\Control\Print\Providers\2807939568] 'Name' = '"%TEMP%\3.tmp"'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /L'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /k'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /B'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /T'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /G'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /e'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeisiup' = '%HOMEPATH%\yeisiup.exe /m'
Creates the following files on removable media:
- <Drive name for removable media>:\Documents.lnk
- <Drive name for removable media>:\Passwords.lnk
- <Drive name for removable media>:\Pictures.lnk
- <Drive name for removable media>:\Video.lnk
- <Drive name for removable media>:\Music.lnk
- <Drive name for removable media>:\AgNG.ico
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\yeisiup.exe
- <Drive name for removable media>:\New Folder.lnk
- <Drive name for removable media>:\yeisiupx.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
Creates and executes the following:
- %HOMEPATH%\vopnat.exe
- %HOMEPATH%\yeisiup.exe
- %HOMEPATH%\uwray.exe
- %HOMEPATH%\Tfmjq27d31.exe
- %HOMEPATH%\uvray.exe
Executes the following:
- <SYSTEM32>\tasklist.exe
Injects code into
the following system processes:
- <SYSTEM32>\spoolsv.exe
Modifies settings of Windows Internet Explorer:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1400' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1601' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] 'currentlevel' = '00000000'
Modifies file system :
Creates the following files:
- %WINDIR%\Temp\4.tmp
- %TEMP%\2.tmp
- %TEMP%\Rlb..bat
- %HOMEPATH%\yeisiup.exe
- %HOMEPATH%\uvray.exe
- %HOMEPATH%\Tfmjq27d31.exe
- %HOMEPATH%\vopnat.exe
- %HOMEPATH%\uwray.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\yeisiup.exe
- <Drive name for removable media>:\yeisiupx.exe
- <Drive name for removable media>:\AgNG.ico
- %HOMEPATH%\yeisiup.exe
- <Drive name for removable media>:\autorun.inf
Deletes the following files:
- %HOMEPATH%\Tfmjq27d31.exe
- %HOMEPATH%\uwray.exe
- %WINDIR%\Temp\4.tmp
- %TEMP%\3.tmp
- <DRIVERS>\etc\hosts
Network activity:
Connects to:
- 'pu##bug.in':80
- 'ap#.#ostip.info':80
- '74.##5.232.51':80
TCP:
HTTP GET requests:
- ap#.#ostip.info/country.php
- 74.##5.232.51/
HTTP POST requests:
- pu##bug.in/90ds8c9ds8c9d0s8cds.php?in##############################################################################################################
UDP:
- DNS ASK google.com
- DNS ASK ap#.#ostip.info
- DNS ASK pu##bug.in
- DNS ASK ti##pic.com
- DNS ASK ma##h.com
- DNS ASK da##.net
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
- ClassName: 'MS_WebcheckMonitor' WindowName: ''
- ClassName: 'MS_AutodialMonitor' WindowName: ''
