Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '44bf8422cc408a60ebabc3b2af60a94c' = '"%TEMP%\Skype.exe" ..'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '44bf8422cc408a60ebabc3b2af60a94c' = '"%TEMP%\Skype.exe" ..'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\44bf8422cc408a60ebabc3b2af60a94c.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\Skype.exe' = '%TEMP%\Skype.exe:*:Enabled:Skype.exe'
Creates and executes the following:
- '%TEMP%\Skype.exe'
- '%TEMP%\Program.exe'
- '%TEMP%\S.exe'
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\Skype.exe" "Skype.exe" ENABLE
Modifies file system :
Creates the following files:
- %APPDATA%\Microsoft\CryptnetUrlCache\Content\2BF68F4714092295550497DD56F57004
- %APPDATA%\Microsoft\CryptnetUrlCache\MetaData\2BF68F4714092295550497DD56F57004
- %HOMEPATH%\Cookies\%USERNAME%@localhost[1].txt
- %APPDATA%\uTorrent\settings.dat.new
- %HOMEPATH%\Cookies\%USERNAME%@localhost[2].txt
- %APPDATA%\uTorrent\toolbar.benc.new
- %TEMP%\utt2.tmp.new
- %TEMP%\utt1.tmp.new
- %TEMP%\Program.exe
- %TEMP%\S.exe
- %TEMP%\Skype.exe
- %APPDATA%\Microsoft\Crypto\RSA\S-1-5-21-2052111302-484763869-725345543-1003\1f91d2d17ea675d4c2c3192e241743f9_23ef5514-3059-436f-a4a7-4cefaab20eb1
- %APPDATA%\Microsoft\Protect\S-1-5-21-2052111302-484763869-725345543-1003\Preferred
- %APPDATA%\Microsoft\Protect\S-1-5-21-2052111302-484763869-725345543-1003\3492ced3-013e-4b44-9f06-f7ada03854a3
Deletes the following files:
- %HOMEPATH%\Cookies\%USERNAME%@localhost[2].txt
- %HOMEPATH%\Cookies\%USERNAME%@localhost[1].txt
- %TEMP%\utt1.tmp
Moves the following files:
- from %TEMP%\utt2.tmp.new to %TEMP%\utt2.tmp
- from %APPDATA%\uTorrent\toolbar.benc.new to %APPDATA%\uTorrent\toolbar.benc
- from %TEMP%\utt1.tmp.new to %TEMP%\utt1.tmp
- from %APPDATA%\uTorrent\settings.dat.new to %APPDATA%\uTorrent\settings.dat
Network activity:
Connects to:
- 'localhost':1041
- 'www.download.windowsupdate.com':80
- 'wp#d':80
TCP:
HTTP GET requests:
- www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootseq.txt
- wp#d/wpad.dat
UDP:
- DNS ASK bo#####ked.no-ip.org
- DNS ASK up####.utorrent.com
- DNS ASK ro####.bittorrent.com
- DNS ASK be###.utorrent.com
- DNS ASK wp#d
- DNS ASK www.download.windowsupdate.com
- DNS ASK ro####.utorrent.com
Miscellaneous:
Searches for the following windows:
- ClassName: '?Torrent4823DF041B09' WindowName: '(null)'
- ClassName: 'Indicator' WindowName: '(null)'
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
