PUA.Win32.PCCleaner.AT

November 08, 2019

ALIASES:

OneSafePcCleaner. (McAfee); Hoax.Win32.SafeCleaner.h (Kaspersky)

PLATFORM:

Windows

OVERALL RISK RATING:

DAMAGE POTENTIAL:

DISTRIBUTION POTENTIAL:

REPORTED INFECTION:

INFORMATION EXPOSURE:

Threat Type: Potentially Unwanted Application
Destructiveness: No
Encrypted:
In the wild: Yes

OVERVIEW

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

TECHNICAL DETAILS

File Size:

7,420,832 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

06 Nov 2019

Arrival Details

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Potentially Unwanted Application creates the following folders:

%All Users Profile%\Microsoft\Windows\Start Menu\Programs\OneSafe PC Cleaner
%Program Files%\OneSafe PC Cleaner
%Application Data%\OneSafe PC Cleaner\Backup
%Application Data%\OneSafe PC Cleaner
%All Users Profile%\OneSafe PC Cleaner
%Application Data%\OneSafe PC Cleaner\Undo
%Application Data%\OneSafe PC Cleaner\Log

(Note: %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). . %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other System Modifications

This Potentially Unwanted Application adds the following registry keys:

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1

It adds the following registry entries:

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
InstallerName = "{malware path and file name}.exe"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
PrivacyURL = "{random characters}"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
EulaURL = "{random characters}"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
AdsAntivirusLink = "{random characters}"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
AdsAntivirusName = "Adaware"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
AdsDownloadURL = "{random characters}"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
UseAds = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
BuyNowURL50 = "{random characters}"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
BuyNowURL20 = "{random characters}"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
PromoOffers = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
HideAfterInstallURL = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
Phones = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
ComplementURL = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
BuyNowURLCs = "{random characters}"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
UninstallURL = "{random characters}"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
AfterInstallURL = "{random characters}"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
SupportURL = "{random characters}"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
RenewURL = "{random characters}"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
ProURL = "{random characters}"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
BuyNowURL = "{random characters}"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
HomePageURL = "{random characters}"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
PartnerID = "ONESAFE"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
UpgradeID = "ML_OSPCC_63"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
BuildID = "OneSafe_PC_Cleaner_ML"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
CreationDate = "21/10/2019"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
Cv = "Sep2019"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
Language = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
Inno Setup: Setup Version = "6.0.2 (u)"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
Inno Setup: App Path = "%Program Files%\OneSafe PC Cleaner"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
InstallLocation = "%Program Files%\OneSafe PC Cleaner"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
Inno Setup: Icon Group = "OneSafe PC Cleaner"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
Inno Setup: User = "{username}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
Inno Setup: Selected Tasks = "desktopicon"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
Inno Setup: Deselected Tasks = ""

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
Inno Setup: Language = "en"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
DisplayName = "OneSafe PC Cleaner v6.9.10.57 (32-bit)"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
DisplayIcon = "%Program Files%\OneSafe PC Cleaner\OneSafePCCleaner.exe,0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
UninstallString = "%Program Files%\OneSafe PC Cleaner\unins000.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
QuietUninstallString = "%Program Files%\OneSafe PC Cleaner\unins000.exe /SILENT"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
DisplayVersion = "6.9.10.57"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
Publisher = "Avanquest Software"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
NoModify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
NoRepair = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
InstallDate = "20191106"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
MajorVersion = "6"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
MinorVersion = "9"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
VersionMajor = "6"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
VersionMinor = "9"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
OneSafe PC Cleaner_is1
EstimatedSize = "17999"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
OnWinStartup = "0"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
s_SmartEnabled = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
s_SmartMode = "0"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
s_SmartDate = "\xedo\x00\xc6_\xe5@"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
MonitorNotifications = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
LastMonitorNotification = "\xedo\x00\xe6_\xe5@"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
NewAppNotifications = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
NewExtNotifications = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
StartupNotifications = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
CrashNotifications = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
NoAVNotifications = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
LowDiskSpaceNotifications = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
LowFreeMemNotifications = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
BigCacheSizeNotifications = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
UninstallNotifications = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
MinFreeDiskSpace = "10"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
MinFreeMemory = "10"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
MinCacheSize = "500"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
CheckUpdates = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
LastUpdCheck = "\xedo\x00\xe6_\xe5@"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
SoftwareNotifications = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
LastSrvNotification = "\xedo\x00\xc6_\xe5@"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
LastSrvCheck = "\xedo\x00\xe6_\xe5@"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
BackupDir = "%Application Data%\OneSafe PC Cleaner\Backup"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
DisplayName = "OneSafe PC Cleaner"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
Version = "6.9.10"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
InstallationDate = "q\xec\x01\xe6_\xe5@"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
TrayAllowed = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
NLaunches = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
LogDir = "%Application Data%\OneSafe PC Cleaner\Log"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
UndoDir = "%Application Data%\OneSafe PC Cleaner\Undo"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
ItemsToRegistryScan = "1111111111"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
ItemsToPrivacyScan = "1111"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
ItemsToRecoveryScan = "1111"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
UseExclusions = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
ShowRebootMessage = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
ShowRecycleBin = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
FormSP = "1"

HKEY_CURRENT_USER\Software\OneSafe PC Cleaner
ShowTips = "1"

Dropping Routine

This Potentially Unwanted Application drops the following files:

%Program Files%\OneSafe PC Cleaner\Portuguese.ini
%Program Files%\OneSafe PC Cleaner\Cookies.txt
%Program Files%\OneSafe PC Cleaner\German.ini
%Program Files%\OneSafe PC Cleaner\SList.txt
%All Users Profile%\Microsoft\Windows\Start Menu\Programs\OneSafe PC Cleaner\OneSafe PC Cleaner.lnk
%Program Files%\OneSafe PC Cleaner\English.ini
%Program Files%\OneSafe PC Cleaner\Finnish.ini
%Program Files%\OneSafe PC Cleaner\Services2.txt
%Program Files%\OneSafe PC Cleaner\Polish.ini
%Program Files%\OneSafe PC Cleaner\Services1.txt
%All Users Profile%\Microsoft\Windows\Start Menu\Programs\OneSafe PC Cleaner\OneSafe PC Cleaner on the Web.lnk
%Desktop%\OneSafe PC Cleaner.lnk
%Program Files%\OneSafe PC Cleaner\Japanese.ini
%Program Files%\OneSafe PC Cleaner\Italian.ini
%Program Files%\OneSafe PC Cleaner\Dutch.ini
%All Users Profile%\OneSafe PC Cleaner\Cookies.txt
%Program Files%\OneSafe PC Cleaner\Swedish.ini
%All Users Profile%\Microsoft\Windows\Start Menu\Programs\OneSafe PC Cleaner\Help.lnk
%Program Files%\OneSafe PC Cleaner\sqlite3.dll
%All Users Profile%\Microsoft\Windows\Start Menu\Programs\OneSafe PC Cleaner\Uninstall OneSafe PC Cleaner.lnk
%Program Files%\OneSafe PC Cleaner\Animation.gif
%Program Files%\OneSafe PC Cleaner\SchedTasks.txt
%Program Files%\OneSafe PC Cleaner\unins000.dat
%Program Files%\OneSafe PC Cleaner\OSPCNotifications.exe
%Program Files%\OneSafe PC Cleaner\SList.db
%Program Files%\OneSafe PC Cleaner\unins000.exe
%Program Files%\OneSafe PC Cleaner\Danish.ini
%Program Files%\OneSafe PC Cleaner\Brazilian.ini
%System%\Tasks\OneSafe PC Cleaner automatic scan and notifications
%Program Files%\OneSafe PC Cleaner\Turkish.ini
%All Users Profile%\Microsoft\Windows\Start Menu\Programs\OneSafe PC Cleaner\Check updates.lnk
%Program Files%\OneSafe PC Cleaner\French.ini
%Program Files%\OneSafe PC Cleaner\OneSafePCCleaner.exe
%Program Files%\OneSafe PC Cleaner\Russian.ini
%Program Files%\OneSafe PC Cleaner\Spanish.ini
%Program Files%\OneSafe PC Cleaner\Norwegian.ini
%Program Files%\OneSafe PC Cleaner\OneSafePCCleaner.chm

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).. %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). . %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\Desktop on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Other Details

This Potentially Unwanted Application connects to the following possibly malicious URL:

http://s.{BLOCKED}d.com/{random path}
http://sw.{BLOCKED}d.com/{random path}
http://stats.{BLOCKED}ctools.com/si?{random characters}
http://dev.{BLOCKED}pport.smartpcupdate.com/build/ONESAFE/OneSafe_PC_Cleaner_ML
http://crl.{BLOCKED}sign.com/gs/gsorganizationvalsha2g2.crl
http://webtools.{BLOCKED}est.com
http://webtools.{BLOCKED}esoftware.com

SOLUTION

Minimum Scan Engine:

9.850

SSAPI PATTERN File:

2.233.00

SSAPI PATTERN Date:

07 Nov 2019

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Remove PUA.Win32.PCCleaner.AT by using its own Uninstall option

[ Learn More ]

To uninstall the grayware process

Step 3

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.PCCleaner.AT. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:

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PUA.Win32.PCCleaner.AT

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