Trojan.DownLoader33.39943

Technical Information

To ensure autorun and distribution

Modifies the following registry keys

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'fa280178bd55348ab39c6738d80c9542' = '"%APPDATA%\servsss.exe" ..'
[<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'fa280178bd55348ab39c6738d80c9542' = '"%APPDATA%\servsss.exe" ..'

Malicious functions

Executes the following

'%WINDIR%\syswow64\netsh.exe' firewall add allowedprogram "%APPDATA%\servsss.exe" "servsss.exe" ENABLE

Modifies file system

Creates the following files

%APPDATA%\rcsetup153.exe
%TEMP%\nst3433.tmp\ui\res\lang-1032.dll
%TEMP%\nst3433.tmp\ui\res\lang-1037.dll
%TEMP%\nst3433.tmp\ui\res\lang-1027.dll
%TEMP%\nst3433.tmp\ui\res\lang-2052.dll
%TEMP%\nst3433.tmp\ui\res\lang-1029.dll
%TEMP%\nst3433.tmp\ui\res\lang-1038.dll
%TEMP%\nst3433.tmp\ui\res\lang-1046.dll
%TEMP%\nst3433.tmp\ui\res\lang-1035.dll
%TEMP%\nst3433.tmp\ui\res\lang-1030.dll
%TEMP%\nst3433.tmp\ui\res\lang-1028.dll
%TEMP%\nst3433.tmp\ui\res\lang-1045.dll
%TEMP%\nst3433.tmp\ui\res\lang-1034.dll
%TEMP%\nst3433.tmp\ui\res\lang-1036.dll
%TEMP%\nst3433.tmp\ui\res\lang-1043.dll
%TEMP%\nst3433.tmp\ui\res\lang-1040.dll
%TEMP%\nst3433.tmp\ui\res\lang-1044.dll
%TEMP%\nst3433.tmp\ui\res\lang-1053.dll
%TEMP%\nst3433.tmp\ui\res\lang-1049.dll
%TEMP%\nst3433.tmp\ui\res\lang-1041.dll
%TEMP%\nst3433.tmp\ui\res\lang-1031.dll
%TEMP%\nst3433.tmp\ui\res\montserrat-regular.otf
%TEMP%\nst3433.tmp\ui\res\lang-1055.dll
%TEMP%\nst3433.tmp\ui\res\lang-1048.dll
%LOCALAPPDATA%\microsoft\windows\history\history.ie5\mshist012020050920200510\index.dat
%TEMP%\nst3433.tmp\ui\res\lang-1063.dll
%TEMP%\nst3433.tmp\nsdialogs.dll
%TEMP%\nst3433.tmp\ui\res\lang-1054.dll
%TEMP%\nst3433.tmp\ui\res\lang-1057.dll
%TEMP%\nst3433.tmp\ui\res\lang-1062.dll
%TEMP%\nst3433.tmp\ui\res\lang-1059.dll
%TEMP%\nst3433.tmp\ui\res\lang-1060.dll
%TEMP%\nst3433.tmp\ui\res\lang-1068.dll
%TEMP%\nst3433.tmp\ui\res\lang-9999.dll
%TEMP%\nst3433.tmp\ui\res\lang-1079.dll
%TEMP%\nst3433.tmp\ui\res\lang-1061.dll
%TEMP%\nst3433.tmp\ui\res\lang-1067.dll
%TEMP%\nst3433.tmp\ui\res\lang-1066.dll
%TEMP%\nst3433.tmp\ui\res\lang-1050.dll
%TEMP%\nst3433.tmp\ui\res\lang-1058.dll
%TEMP%\nst3433.tmp\ui\res\lang-1026.dll
%TEMP%\nst3433.tmp\ui\res\lang-5146.dll
%TEMP%\nst3433.tmp\ui\res\lang-1071.dll
%TEMP%\nst3433.tmp\ui\res\lang-1051.dll
%TEMP%\nst3433.tmp\ui\res\lang-2074.dll
%TEMP%\nst3433.tmp\ui\res\lang-3098.dll
%TEMP%\nst3433.tmp\ui\res\lang-1052.dll
%TEMP%\nst3433.tmp\ui\res\rc_computer.png
%TEMP%\nst3433.tmp\ui\res\lang-1025.dll
%TEMP%\nst3433.tmp\ui\res\recuva_logo_72px.png
%TEMP%\nst3433.tmp\g\gtb\toolbar_1042.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1040.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1038.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1037.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1036.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1035.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1034.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1033.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1032.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1031.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1030.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1029.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1028.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1027.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1026.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1025.html
%TEMP%\nst3433.tmp\g\gcapi_dll.dll
%TEMP%\nst3433.tmp\g\gtapi_signed.dll
%TEMP%\nst3433.tmp\userinfo.dll
%TEMP%\nst3433.tmp\system.dll
%TEMP%\nsd3422.tmp
%APPDATA%\google.exe
%TEMP%\nst3433.tmp\g\gtb\toolbar_1041.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1043.html
%TEMP%\nst3433.tmp\ui\pfui.dll
%TEMP%\nst3433.tmp\g\gtb\toolbar_1044.html
%TEMP%\nst3433.tmp\g\pfwww.dll
%TEMP%\nst3433.tmp\g\gtb\toolbar-screenshot.jpg
%TEMP%\nst3433.tmp\g\gtb\toolbar_3098.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_2070.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_2052.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1102.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1066.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1062.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1061.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1060.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1058.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1057.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1055.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1054.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1053.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1051.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1050.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1049.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1048.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1046.html
%TEMP%\nst3433.tmp\g\gtb\toolbar_1045.html
%TEMP%\nst3433.tmp\ui\res\pf_logo.png
%APPDATA%\servsss.exe

Network activity

Connects to

'go######rcpics16.ddns.net':2222

UDP

DNS ASK go######rcpics16.ddns.net

Miscellaneous

Searches for the following windows

ClassName: 'MS_AutodialMonitor' WindowName: ''
ClassName: 'MS_WebCheckMonitor' WindowName: ''

Creates and executes the following

'%APPDATA%\rcsetup153.exe'
'%APPDATA%\google.exe'
'%APPDATA%\servsss.exe'
'%WINDIR%\syswow64\netsh.exe' firewall add allowedprogram "%APPDATA%\servsss.exe" "servsss.exe" ENABLE' (with hidden window)