JS.Proslikefan
Posted: September 14, 2012
Threat Metric
The following fields listed on the Threat Meter containing a specific value, are explained in detail below:
Threat Level: The threat level scale goes from 1 to 10 where 10 is the highest level of severity and 1 is the lowest level of severity. Each specific level is relative to the threat's consistent assessed behaviors collected from SpyHunter's risk assessment model.
Detection Count: The collective number of confirmed and suspected cases of a particular malware threat. The detection count is calculated from infected PCs retrieved from diagnostic and scan log reports generated by SpyHunter.
Volume Count: Similar to the detection count, the Volume Count is specifically based on the number of confirmed and suspected threats infecting systems on a daily basis. High volume counts usually represent a popular threat but may or may not have infected a large number of systems. High detection count threats could lay dormant and have a low volume count. Criteria for Volume Count is relative to a daily detection count.
Trend Path: The Trend Path, utilizing an up arrow, down arrow or equal symbol, represents the level of recent movement of a particular threat. Up arrows represent an increase, down arrows represent a decline and the equal symbol represent no change to a threat's recent movement.
% Impact (Last 7 Days): This demonstrates a 7-day period change in the frequency of a malware threat infecting PCs. The percentage impact correlates directly to the current Trend Path to determine a rise or decline in the percentage.
Ranking: | 3,383 |
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Threat Level: | 2/10 |
Infected PCs: | 13,832 |
First Seen: | September 14, 2012 |
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Last Seen: | October 16, 2023 |
OS(es) Affected: | Windows |
JS.Proslikefan is a JavaScript worm that circulates through file-sharing applications, removable drives and mapped network shares. Once executed, JS.Proslikefan may copy itself to the certain locations. JS.Proslikefan may alter several files in order to change the PC user's home page. JS.Proslikefan creates the certain registry entry so that it can launch automatically every time Windows is started. JS.Proslikefan also deletes the certain registry subkeys and modifies numerous other registry entries, some of them for altering the web browser settings and to alter the DNS setting the infected computer. JS.Proslikefan checks if any of the numerous anti-virus software are installed on the compromised PC and ends mostly security-related processes.
Technical Details
File System Modifications
Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.
The following files were created in the system:%ProgramFiles%\3db7\3cb3.js
File name: %ProgramFiles%\3db7\3cb3.jsFile type: JavaScript file
Mime Type: unknown/js
Group: Malware file
%UserProfile%\Start Menu\Programs\Startup\[ENCODED STRING].js
File name: %UserProfile%\Start Menu\Programs\Startup\[ENCODED STRING].jsFile type: JavaScript file
Mime Type: unknown/js
Group: Malware file
%UserProfile%\Application Data\uc\cu.js
File name: %UserProfile%\Application Data\uc\cu.jsFile type: JavaScript file
Mime Type: unknown/js
Group: Malware file
%UserProfile%\Local Settings\Application Data\Mozilla\Firefox\Profiles\user.js
File name: %UserProfile%\Local Settings\Application Data\Mozilla\Firefox\Profiles\user.jsFile type: JavaScript file
Mime Type: unknown/js
Group: Malware file
%UserProfile%\Local Settings\Application Data\Google\Chrome\User Data\Default\Preferences
File name: %UserProfile%\Local Settings\Application Data\Google\Chrome\User Data\Default\PreferencesGroup: Malware file
%DriveLetter%\autorun.inf
File name: %DriveLetter%\autorun.infMime Type: unknown/inf
Group: Malware file
%DriveLetter%\[SCRIPT NAME].js
File name: %DriveLetter%\[SCRIPT NAME].jsFile type: JavaScript file
Mime Type: unknown/js
Group: Malware file
%SystemDrive%\prospect\knock
File name: %SystemDrive%\prospect\knockGroup: Malware file
Registry Modifications
HKEY..\..\{CLSID Path}HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\explorer\ShellServiceObjects\{FD6905CE-952F-41F1-9A6F-135D9C6622CC}HKEY..\..\{Value}HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\"cu" = "%UserProfile%\Application Data\uc\cu.js"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\"MigrateProxy" = "0"HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\"ParseAutoexec" = "0"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\"ProxyEnable" = "0"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\"EnableFirewall" = "0"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\"AntiVirusDisableNotify" = "1"HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\"DisableCMD" = "1"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\"FirewallDisableNotify" = "1"HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\"NoDispCPL" = "1"HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Control Panel\"HomePage" = "1"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\"NofolderOptions" = "1"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\"NoWindowsUpdate" = "1"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\"UpdatesDisableNotify" = "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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\"NoControlPanel" = "1"HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\MRT\"DontReportInfectionInformation" = "1"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\"AntiVirusOverride" = "1"HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\"DisableTaskMgr" = "1"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\"FirewallOverride" = "1"HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\"DisableRegistryTools" = "1"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\"Hidden" = "2"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wscsvc\"Start" = "4"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\"HideFileExt" = "1"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\"SystemRestoreDisableSR" = "1"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\"www" = "[VALUE FROM CONFIGURATION FILE]"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\URL\DefaultPrefix\"Default" = "[VALUE FROM CONFIGURATION FILE]"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\URL\Prefixes\"Default" = "[VALUE FROM CONFIGURATION FILE]"HKEY..\..\..\..{Subkeys}HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SafeBootHKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DhcpNameServerHKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\NameServer
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