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JS.Proslikefan

Risk Level 2: Low

Discovered:
September 11, 2012
Updated:
June 24, 2013 10:42:55 AM
Type:
Trojan, Worm
Infection Length:
93,108 bytes
Systems Affected:
Windows 2000, Windows 7, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows Server 2008, Windows Vista, Windows XP
When the worm is executed it may copy itself to the following locations:
  • %UserProfile%\Application Data\uc\cu.js
  • %ProgramFiles%\3db7\3cb3.js
  • %UserProfile%\Start Menu\Programs\Startup\[ENCODED STRING].js

Next, the worm may modify the following files in order to change the user's home page:
  • %UserProfile%\Local Settings\Application Data\Google\Chrome\User Data\Default\Preferences
  • %UserProfile%\Local Settings\Application Data\Mozilla\Firefox\Profiles\user.js

It may also create the following files:
  • %Temp%\Perflib_Perfdata_20c.dat
  • %Temp%\Perflib_Perfdata_210.dat

The worm sets the following attributes for all folders that it creates:
  • Archive
  • Hidden
  • Read-only
  • System

It then creates the following registry entries so that it executes whenever Windows starts:
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\"cu" = "%UserProfile%\Application Data\uc\cu.js"
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\"719" = "%User_Profile%\Application Data\67\719.js"
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\"b326b" = "%User_Profile%\Application Data\a5\b326b.js"

Next, it deletes the following registry subkeys:
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SafeBoot
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\explorer\ShellServiceObjects\{FD6905CE-952F-41F1-9A6F-135D9C6622CC}

The worm then modifies the following registry entries in order to disable antiviurs and firewall settings on the compromised computer:
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\Svc\"FirewallDisableNotify" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\Svc\"FirewallOverride" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\"AntiVirusDisableNotify" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\"AntiVirusOverride" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\"FirewallDisableNotify" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\"FirewallOverride" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\"UpdatesDisableNotify" = "1"

It then modifies the following registry entries in order to disable command prompt, registry editor, and Windows Task Manager on the compromised computer:
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\"DisableCMD" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\"DisableRegistryTools" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\"DisableTaskMgr" = "1"
  • HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\"DisableCMD" = "1"
  • HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\"DisableTaskMgr" = "1"
  • HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\"DisableRegistryTools" = "1"

Next, the worm modifies the following registry entries in order to change the DNS and browser settings on the compromised computer:
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\"DhcpNameServer" = "[VALUE FROM CONFIGURATION FILE]"
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\"NameServer" = "[VALUE FROM CONFIGURATION FILE]"
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\URL\Prefixes\"www = "[VALUE FROM CONFIGURATION FILE]#"
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\URL\"DefaultPrefix\ = "[VALUE FROM CONFIGURATION FILE]#"
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\Main\"Start Page = "[VALUE FROM CONFIGURATION FILE]"
  • HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\"Start Page = "[VALUE FROM CONFIGURATION FILE]"
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\URL\Prefixes\"Default" = "[VALUE FROM CONFIGURATION FILE]#"

It also modifies the following registry entries:
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\"NoDispCPL" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\"Advanced\Hidden = 2
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\"SystemRestoreDisableSR" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\MRT\"DontReportInfectionInformation" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Internet Explorer\Control Panel\"HomePage" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore\"DisableConfig" = "1"
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wscsvc\"Start" = "4"
  • HKEY_LOCAL_MACHINE\system\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\"EnableFirewall" = "0"
  • HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\"ParseAutoexec" = "0"
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\"HideFileExt" = "1"
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\"ProxyEnable" = "0"
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\"MigrateProxy" = "0"
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\"NofolderOptions" = "1"
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\"NoControlPanel" = "1"
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\"NoWindowsUpdate" = "1"
  • HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\"NoDispCPL" = "1"
  • HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Internet Explorer\Control Panel\"HomePage" = "1"

Next, it modifies the following registry entries in order to alter the browser settings on the compromised computer:
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\URL\Prefixes\"www" = "[VALUE FROM CONFIGURATION FILE]"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\URL\DefaultPrefix\"Default" = "[VALUE FROM CONFIGURATION FILE]"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\"Start Page"22 = "[VALUE FROM CONFIGURATION FILE]"
  • HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\"Start Page" = "[VALUE FROM CONFIGURATION FILE]"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\URL\Prefixes\"Default" = "[VALUE FROM CONFIGURATION FILE]"

It then modifies registry entries under the following subkeys in order to alter the DNS setting on the compromised computer:
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DhcpNameServer
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\NameServer

The worm then checks if any of the following antivirus programs are installed:
  • Alwil Software
  • AVAST Software
  • AVG
  • Avira
  • Bitdefender
  • COMODO
  • DrWeb
  • ESET
  • F-Secure
  • Kaspersky Lab
  • Malwarebytes' Anti-Malware
  • McAfee
  • Microsoft Security Client
  • Microsoft Security Essentials
  • Panda Security
  • Sophos
  • Spyware Doctor
  • Sunbelt
  • Symantec
  • Trend Micro
  • Webroot

It may then end the following (mostly security-related) processes:
  • avast.setup
  • avgmfapx.exe
  • cmd.exe
  • fs2011.exe
  • HijackThis.exe
  • HousecallLauncher.exe
  • issetup.exe
  • mbam.exe
  • mbam-setup.exe
  • mrt.exe
  • mrtstub.exe
  • msconfig.exe
  • mseinstall.exe
  • procexp.exe
  • ptinstall.exe
  • regedit.exe
  • rstrui.exe
  • RUBottedSetup.exe
  • sdasetup.exe
  • setup.exe
  • wuauclt.exe

The worm performs the following actions to determine if it is executing in a virtual environment.

The worm checks whether the following processes are running in memory:
  • autoruns
  • avast
  • avenger
  • avg
  • CaptureClient.exe
  • ccsetup
  • clean
  • combofix
  • dds
  • emergencykit
  • eset
  • exeradar
  • fiddler
  • filemon
  • fs20
  • fss
  • gmer
  • hijack
  • hitman
  • hotfix
  • housecall
  • issetup
  • jrt
  • klwk
  • mbam
  • mbsa
  • mcshield
  • minitool
  • mrt
  • msconfig
  • mse
  • msss
  • npe
  • otl
  • perfmon
  • procexp
  • procmon
  • ptinstall
  • reged
  • regmon
  • resmon
  • rkill
  • roguekiller
  • rstrui
  • rubotted
  • sdasetup
  • sdefendi
  • spybot
  • systemlook
  • tcpview
  • unlocker
  • windows-kb
  • wireshark
  • wuauclt
  • zoek

It also the Bios manufacturer for the following programs:
  • Bochs
  • innotek
  • QEMU
  • Xen

It then checks for the following disk drive models:
  • Bochs
  • QEMU
  • Red Hat
  • VBOX
  • Virtual HDD
  • VMware
  • Xen

The worm also checks that the CPU name is not QEMU or Bochs and that the SCSI Controller name or manufacturer is not Citrix, Xen or Red Hat.

Next, the worm may attempt to contact the following command-and-control (C&C) server:
jsh37.net

The worm then downloads a configuration file from the C&C server and saves it to the following location:
%SystemDrive%\prospect\knock

If any Google searches respond with possible SQL injection errors, the worm sends the associated information to the C&C server.

It also gathers the following information from the compromised computer and sends it to the C&C server:
  • Computer name
  • Installed anti-malware program information
  • OS version
  • Script information
  • User name



If the user is logged in to Facebook, the worm may perform the following actions:
  • Become a fan of a page
  • Like a page
  • Setup a chat

The worm then modifies the hosts file in an attempt to prevent access to the following domains:
  • antivirus.com
  • bleepingcomputer.com
  • ca.com
  • dispatch.mcafee.com
  • download.bleepingcomputer.com
  • download.cnet.com
  • download.mcafee.com
  • download.microsoft.com
  • downloads.malwarebytes.org
  • downloads.microsoft.com
  • free.antivirus.com
  • f-secure.com
  • go.microsoft.com
  • housecall.trendmicro.com
  • kaspersky.com
  • liveupdate.symantecliveupdate.com
  • malwarebytes.org
  • mast.mcafee.com
  • mcafee.com
  • microsoft.com
  • msdn.microsoft.com
  • mse.dlservice.microsoft.com
  • my-etrust.com
  • nai.com
  • norton.com
  • pandasecurity.com
  • pctools.com
  • secure.nai.com
  • securelist.com
  • securityresponse.symantec.com
  • sophos.com
  • support.microsoft.com
  • symantec.com
  • symantecliveupdate.com
  • trendmicro.com
  • update.symantec.com
  • updates.symantec.com
  • us.mcafee.com
  • us.trendmicro.com
  • v4.windowsupdate.microsoft.com
  • v5.windowsupdate.microsoft.com
  • viruslist.com
  • virustotal.com
  • windows.microsoft.com
  • windowsupdate.microsoft.com
  • windowsupdate.microsoft.com
  • www.antivirus.com
  • www.bleepingcomputer.com
  • www.ca.com
  • www.f-secure.com
  • www.kaspersky.com
  • www.malwarebytes.org
  • www.mcafee.com
  • www.microsoft.com
  • www.my-etrust.com
  • www.nai.com
  • www.norton.com
  • www.pandasecurity.com
  • www.pctools.com
  • www.securelist.com
  • www.sophos.com
  • www.symantec.com
  • www.symantecliveupdate.com
  • www.trendmicro.com
  • www.viruslist.com
  • www.virustotal.com

The above domains are diverted to the following IP address:
3.[REMOVED].1.2

The worm then attempts to connect to following DNS servers:
  • bjdszi.eu
  • brzuwiyhqk.ru
  • btlawlvgk.biz
  • bvjnnyah.eu
  • cjmmyi.biz
  • copertps.com
  • damantryglnd.biz
  • erpwrsqs.biz
  • etpsoprc.ru
  • ggrynohjts.info
  • ivlvkfo.net
  • kggactk.name
  • kmwexmxidu.info
  • knkaopkktb.net
  • lefekmynm.name
  • mosuaghqf.name
  • mqigbhlv.net
  • nglvzlzoc.name
  • nzsiwyz.se
  • ofekztbgdax.se
  • ovrzaunb.org
  • ppysupe.se
  • qbjnlj.in
  • qdzzfqo.org
  • qxyrdol.se
  • resqdev.in
  • rtoaglqu.in
  • specrtop.org
  • sqgrys.se
  • tlhgbpq.in
  • towwoxzwbs.com
  • twqayffe.in
  • vuclqbknjt.ru
  • vumvgvg.org
  • vxgzgyf.in
  • www.google.com
  • xnmlpguk.ru
  • ybysyhwpq.eu
  • yxbxbuv.ru
  • zbdkyshlj.eu
  • ztgbdtm.biz

It also attempts to connect to the following websites:
  • [http://]bjdszi.eu/[REMOVED]
  • [http://]brzuwiyhqk.ru/[REMOVED]
  • [http://]btlawlvgk.biz/[REMOVED]
  • [http://]bvjnnyah.eu/[REMOVED]
  • [http://]cjmmyi.biz/[REMOVED]
  • [http://]copertps.com/[REMOVED]
  • [http://]damantryglnd.biz/[REMOVED]
  • [http://]erpwrsqs.biz/[REMOVED]
  • [http://]etpsoprc.ru/[REMOVED]
  • [http://]ggrynohjts.info/[REMOVED]
  • [http://]ivlvkfo.net/[REMOVED]
  • [http://]kggactk.name/[REMOVED]
  • [http://]kmwexmxidu.info/[REMOVED]
  • [http://]knkaopkktb.net/[REMOVED]
  • [http://]lefekmynm.name/[REMOVED]
  • [http://]mosuaghqf.name/[REMOVED]
  • [http://]mqigbhlv.net/[REMOVED]
  • [http://]nglvzlzoc.name/[REMOVED]
  • [http://]nzsiwyz.se/[REMOVED]
  • [http://]ofekztbgdax.se/[REMOVED]
  • [http://]ovrzaunb.org/[REMOVED]
  • [http://]ppysupe.se/[REMOVED]
  • [http://]qbjnlj.in/[REMOVED]
  • [http://]qdzzfqo.org/[REMOVED]
  • [http://]qxyrdol.se/[REMOVED]
  • [http://]resqdev.in/[REMOVED]
  • [http://]rtoaglqu.in/[REMOVED]
  • [http://]specrtop.org/[REMOVED]
  • [http://]sqgrys.se/[REMOVED]
  • [http://]tlhgbpq.in/[REMOVED]
  • [http://]towwoxzwbs.com/[REMOVED]
  • [http://]twqayffe.in/[REMOVED]
  • [http://]vuclqbknjt.ru/[REMOVED]
  • [http://]vumvgvg.org/[REMOVED]
  • [http://]vxgzgyf.in/[REMOVED]
  • [http://]www.google.com/loc/js[REMOVED]
  • [http://]xnmlpguk.ru/[REMOVED]
  • [http://]ybysyhwpq.eu/[REMOVED]
  • [http://]yxbxbuv.ru/[REMOVED]
  • [http://]zbdkyshlj.eu/[REMOVED]
  • [http://]ztgbdtm.biz/[REMOVED]

The worm may also perform the following actions on the compromised computer:
  • Download and execute more programs
  • Download updates of itself

The worm spreads by copying itself to the following locations:
  • %DriveLetter%\[SCRIPT NAME].js
  • %DriveLetter%\6767\g76.js
  • %DriveLetter%\6767\i7a7a7.js
  • %DriveLetter%\a5\gb4.js
  • %DriveLetter%\a5\ib8b.js
  • %AllUsers%\Start Menu\Programs\Startup\24db.js
  • %DriveLetter%\Documents and Settings\Default User\Start Menu\Programs\Startup\24db.js
  • %DriveLetter%\Documents and Settings\All Users\Start Menu\Programs\Startup\e76.js
  • %DriveLetter%\Documents and Settings\Default User\Start Menu\Programs\Startup\e76.js
  • %UserProfile%\Application Data\67\719.js
  • %UserProfile%\Application Data\a5\b326b.js
  • %UserProfile%\Local Settings\Temp\8ef8
  • %UserProfile%\Local Settings\Temp\fd77
  • %UserProfile%\Start Menu\Programs\Startup\24db.js
  • %UserProfile%\Start Menu\Programs\Startup\e76.js
  • %ProgramFiles%\7884\798.js
  • %ProgramFiles%\ba3\bb39b.js
  • %CurrentFolder%\1.bat
  • %CurrentFolder%\i525.js
  • %CurrentFolder%\2.bat
  • %CurrentFolder%\g5e3.js

It also creates the following file so that it executes whenever the drive is accessed:
%DriveLetter%\autorun.inf

Next, it downloads configuration data from the following location:
thepiratebay.org

The worm spreads by creating a .zip file, using the configuration data, and copying it to the following file-sharing folders:
  • ares\my shared folder
  • bearshare\shared
  • edonkey2000\incoming
  • emule\incoming
  • grokster\my grokster
  • icq\shared folder
  • kazaa lite k++\my shared folder
  • kazaa lite\my shared folder
  • kazaa\my shared folder
  • limewire\shared
  • morpheus\my shared folder
  • My Documents\FrostWire\Shared
  • tesla\files
  • winmx\shared

Recommendations

Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
  • For further information on the terms used in this document, please refer to the Security Response glossary.
Writeup By: Nino Fred Gutierrez, Alan Neville, Kevin Savage, Asuka Yamamoto
Summary| Technical Details| Removal

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