Home Malware Programs Potentially Unwanted Programs (PUPs) Advanced Calendar

Advanced Calendar

Posted: September 1, 2015

Threat Metric

Ranking: 1,277
Threat Level: 1/10
Infected PCs: 343,556
First Seen: July 15, 2015
Last Seen: October 16, 2023
OS(es) Affected: Windows

You should think twice before you give permission for the installation of Advanced Calendar. This application comes with a range of annoying side effects, most noticeable of which are the newly generated advertising materials. The negative user feedback is the reason the computer experts label Advanced Calendar as a Potentially Unwanted Program (PUP). The most popular distribution strategy of this questionable tool is also rather misleading. In almost all cases, it arrives in the systems of its clients together with another free application. This approach is called "bundling", and is so efficient because the users often conduct the installation of freeware through the "Quick" menu. It usually doesn't provide detailed data about the suggested bonus elements, and, as a result, some users may load Advanced Calendar unintentionally. This program, which has been developed by Meixian Xie, allows its clients to schedule their daily tasks. You can achieve it with the help of the integrated Windows calendar as well, so the benefits of keeping Advanced Calendar are questionable at best. What annoys some users is that the PUP inserts pop-ups, banners and sponsored videos in Google Chrome, Mozilla Firefox and Internet Explorer. These ads may slow down the operating speed of the web clients. If your PC is not so powerful, you may experience occasional freezes and crashes as well because the commercial materials use some of the system resources. The ads are related to your browsing history and may be tempting, but you should not click on them. They may transfer you to fraudulent or potentially harmful domains. If you feel that Advanced Calendar comes with more cons than pros, you should delete it with a dedicated anti-malware product.

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(x86)%\calendartool\2.0.0.1000176\calendarserv.exe File name: calendarserv.exe
Size: 151.69 KB (151696 bytes)
MD5: 47333d19e8da47a6cdf23fc7a800983d
Detection count: 28,372
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES(x86)%\calendartool\2.0.0.1000176\calendarserv.exe
Group: Malware file
Last Updated: October 16, 2023
C:\Program Files (x86)\CalendarTool\2.0.0.1000121\CalendarServ.exe File name: CalendarServ.exe
Size: 158.32 KB (158320 bytes)
MD5: 333e6de553ef6dad944b2c970de7613b
Detection count: 1,042
File type: Executable File
Mime Type: unknown/exe
Path: C:\Program Files (x86)\CalendarTool\2.0.0.1000121\CalendarServ.exe
Group: Malware file
Last Updated: September 30, 2022
%PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000121\Calendar.exe File name: Calendar.exe
Size: 3.93 MB (3933808 bytes)
MD5: 8e1b795b41fb8d11eec02731d15cd362
Detection count: 316
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000121
Group: Malware file
Last Updated: September 23, 2019
%PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000040\CalendarServ.exe File name: CalendarServ.exe
Size: 152.17 KB (152176 bytes)
MD5: 2b9676ba4c6d0fe055c92088e2fbe5be
Detection count: 279
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000040
Group: Malware file
Last Updated: November 21, 2019
C:\Program Files\CalendarTool\2.0.0.1000121\Calendar.exe File name: Calendar.exe
Size: 2.24 MB (2249328 bytes)
MD5: cafd7a3383fb6a6ea283097901b60197
Detection count: 237
File type: Executable File
Mime Type: unknown/exe
Path: C:\Program Files\CalendarTool\2.0.0.1000121\Calendar.exe
Group: Malware file
Last Updated: July 18, 2022
%PROGRAMFILES%\CalendarTool\2.0.0.1000040\CalendarServ.exe File name: CalendarServ.exe
Size: 156.78 KB (156784 bytes)
MD5: 82fa0bf914c1cb94772ea7d89cb9a57e
Detection count: 220
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES%\CalendarTool\2.0.0.1000040
Group: Malware file
Last Updated: May 1, 2019
%PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000040\Calendar.exe File name: Calendar.exe
Size: 3.93 MB (3933296 bytes)
MD5: 5cbd796ae0836739d57083be95725c6a
Detection count: 208
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000040
Group: Malware file
Last Updated: August 6, 2018
C:\Program Files (x86)\CalendarTool\2.0.0.1000121\CalendarServ.exe File name: CalendarServ.exe
Size: 153.2 KB (153200 bytes)
MD5: c10092eff0bc3ffac847583ed606610f
Detection count: 204
File type: Executable File
Mime Type: unknown/exe
Path: C:\Program Files (x86)\CalendarTool\2.0.0.1000121\CalendarServ.exe
Group: Malware file
Last Updated: September 28, 2022
C:\Program Files\CalendarTool\2.0.0.1000040\CalendarServ.exe File name: CalendarServ.exe
Size: 156.27 KB (156272 bytes)
MD5: 0d70969082d2ac624b3f82cb34377913
Detection count: 190
File type: Executable File
Mime Type: unknown/exe
Path: C:\Program Files\CalendarTool\2.0.0.1000040\CalendarServ.exe
Group: Malware file
Last Updated: September 11, 2021
%PROGRAMFILES%\CalendarTool\2.0.0.1000040\CalendarServ.exe File name: CalendarServ.exe
Size: 157.29 KB (157296 bytes)
MD5: 4881b90fff14de4037bafea9697f7e94
Detection count: 173
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES%\CalendarTool\2.0.0.1000040
Group: Malware file
Last Updated: April 28, 2020
%PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000121\CalendarServ.exe File name: CalendarServ.exe
Size: 156.27 KB (156272 bytes)
MD5: 7b6533d5c2736269f8af8b4c669382a6
Detection count: 171
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000121
Group: Malware file
Last Updated: April 4, 2017
%PROGRAMFILES%\CalendarTool\2.0.0.1000040\CalendarServ.exe File name: CalendarServ.exe
Size: 156.27 KB (156272 bytes)
MD5: e5b920b3ccd21f57c5ced07c8ff779fc
Detection count: 166
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES%\CalendarTool\2.0.0.1000040
Group: Malware file
Last Updated: November 4, 2019
C:\Program Files (x86)\CalendarTool\2.0.0.1000040\CalendarServ.exe File name: CalendarServ.exe
Size: 150.12 KB (150128 bytes)
MD5: 7f20e87a7d124a5eb5d78064b5b127f7
Detection count: 155
File type: Executable File
Mime Type: unknown/exe
Path: C:\Program Files (x86)\CalendarTool\2.0.0.1000040\CalendarServ.exe
Group: Malware file
Last Updated: February 14, 2022
%PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000040\CalendarServ.exe File name: CalendarServ.exe
Size: 159.85 KB (159856 bytes)
MD5: 3ea523c9c0b31af8cd8008ae4234a659
Detection count: 150
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000040
Group: Malware file
Last Updated: April 4, 2017
%PROGRAMFILES%\CalendarTool\2.0.0.1000040\CalendarServ.exe File name: CalendarServ.exe
Size: 156.78 KB (156784 bytes)
MD5: 4ab7f8659a60efd13d5ec9cb21853fa5
Detection count: 138
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES%\CalendarTool\2.0.0.1000040
Group: Malware file
Last Updated: April 4, 2017
%PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000121\CalendarServ.exe File name: CalendarServ.exe
Size: 152.68 KB (152688 bytes)
MD5: aa50e3a01cef6250ba5ab52531ad69d1
Detection count: 136
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000121
Group: Malware file
Last Updated: September 11, 2019
%PROGRAMFILES%\CalendarTool\2.0.0.1000121\CalendarServ.exe File name: CalendarServ.exe
Size: 155.76 KB (155760 bytes)
MD5: ac2bbd192875a9c69ac2ce48b4daf4bf
Detection count: 129
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES%\CalendarTool\2.0.0.1000121
Group: Malware file
Last Updated: May 16, 2019
C:\Program Files (x86)\CalendarTool\2.0.0.1000121\CalendarServ.exe File name: CalendarServ.exe
Size: 153.2 KB (153200 bytes)
MD5: c932202851a03f089e82aabf6b63ab3a
Detection count: 124
File type: Executable File
Mime Type: unknown/exe
Path: C:\Program Files (x86)\CalendarTool\2.0.0.1000121\CalendarServ.exe
Group: Malware file
Last Updated: April 22, 2022
%PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000121\CalendarServ.exe File name: CalendarServ.exe
Size: 151.66 KB (151664 bytes)
MD5: df5aab5c1778073b5687c819fb279873
Detection count: 112
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000121
Group: Malware file
Last Updated: April 4, 2017
%PROGRAMFILES%\CalendarTool\2.0.0.1000040\CalendarServ.exe File name: CalendarServ.exe
Size: 150.64 KB (150640 bytes)
MD5: f44e23f92515ce78cc8222f9af3bbbbd
Detection count: 110
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES%\CalendarTool\2.0.0.1000040
Group: Malware file
Last Updated: April 4, 2017
%PROGRAMFILES%\CalendarTool\2.0.0.1000121\CalendarServ.exe File name: CalendarServ.exe
Size: 153.71 KB (153712 bytes)
MD5: 5dd5e938cec6fb3143313fbb34c0e025
Detection count: 110
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES%\CalendarTool\2.0.0.1000121
Group: Malware file
Last Updated: April 4, 2017
%PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000121\Calendar.exe File name: Calendar.exe
Size: 3.93 MB (3933808 bytes)
MD5: b79394808e6b6cd006bb78c172ebf17f
Detection count: 105
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000121
Group: Malware file
Last Updated: September 11, 2019
%PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000040\CalendarServ.exe File name: CalendarServ.exe
Size: 155.24 KB (155248 bytes)
MD5: c866e6545742153e497f91a7c7ef5d8b
Detection count: 98
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES(x86)%\CalendarTool\2.0.0.1000040
Group: Malware file
Last Updated: August 5, 2018
%PROGRAMFILES%\CalendarTool\2.0.0.1000040\Calendar.exe File name: Calendar.exe
Size: 2.24 MB (2249328 bytes)
MD5: b292e0c9a02c85e71ca2f7028c12cfb6
Detection count: 91
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES%\CalendarTool\2.0.0.1000040
Group: Malware file
Last Updated: April 4, 2017

More files

Registry Modifications

The following newly produced Registry Values are:

Regexp file mask%WINDIR%\System32\Tasks\ToolsUpdatePlatform_ScheduledTask%WINDIR%\System32\Tasks\{3B7FD029-D932-411b-AF15-C96CF8EF0C18}{19F8DB95-4D78-4ddb-AC71-C610654FE37F}%WINDIR%\System32\Tasks\{D9BAB2C9-5236-48c3-AF02-67E799F09BBD}{19F8DB95-4D78-4ddb-AC71-C610654FE37F}%WINDIR%\Tasks\ToolsUpdatePlatform_ScheduledTask.job%WINDIR%\Tasks\{3B7FD029-D932-411b-AF15-C96CF8EF0C18}{19F8DB95-4D78-4ddb-AC71-C610654FE37F}.job%WINDIR%\Tasks\{D9BAB2C9-5236-48c3-AF02-67E799F09BBD}{19F8DB95-4D78-4ddb-AC71-C610654FE37F}.jobHKEY..\..\..\..{RegistryKeys}SOFTWARE\CalendarToolSOFTWARE\DtsEncodeToolsSOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\CompatibilityAdapter\Signatures\ToolsUpdatePlatform_ScheduledTask.jobSOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\CompatibilityAdapter\Signatures\ToolsUpdatePlatform_ScheduledTask.job.fpSOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\CompatibilityAdapter\Signatures\{3B7FD029-D932-411b-AF15-C96CF8EF0C18}{19F8DB95-4D78-4ddb-AC71-C610654FE37F}.jobSOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\CompatibilityAdapter\Signatures\{3B7FD029-D932-411b-AF15-C96CF8EF0C18}{19F8DB95-4D78-4ddb-AC71-C610654FE37F}.job.fpSOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\CompatibilityAdapter\Signatures\{D9BAB2C9-5236-48c3-AF02-67E799F09BBD}{19F8DB95-4D78-4ddb-AC71-C610654FE37F}.jobSOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\CompatibilityAdapter\Signatures\{D9BAB2C9-5236-48c3-AF02-67E799F09BBD}{19F8DB95-4D78-4ddb-AC71-C610654FE37F}.job.fpSOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\ToolsUpdatePlatform_ScheduledTaskSOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\{3B7FD029-D932-411b-AF15-C96CF8EF0C18}{19F8DB95-4D78-4ddb-AC71-C610654FE37F}SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\{D9BAB2C9-5236-48c3-AF02-67E799F09BBD}{19F8DB95-4D78-4ddb-AC71-C610654FE37F}SOFTWARE\ToolsUpdatePlatformSOFTWARE\Wow6432Node\ToolsUpdatePlatformSYSTEM\ControlSet001\services\TheCalendarServiceSYSTEM\ControlSet002\services\TheCalendarServiceSYSTEM\CurrentControlSet\services\TheCalendarServiceHKEY_LOCAL_MACHINE\Software\[APPLICATION]\Microsoft\Windows\CurrentVersion\Uninstall..{Uninstaller}{6A128791-4857-4484-9BB2-71D4C1257200}{D9BAB2C9-5236-48c3-AF02-67E799F09BBD}

Additional Information

The following directories were created:
%ALLUSERSPROFILE%\Application Data\ToolsUpdatePlatform%ALLUSERSPROFILE%\ToolsUpdatePlatform%APPDATA%\CalendarTool%APPDATA%\{2f3aa0f6-976c-4b02-a66a-5d1dea00811f}%PROGRAMFILES%\CalendarTool%PROGRAMFILES%\ToolsUpdatePlatform%PROGRAMFILES(x86)%\CalendarTool%PROGRAMFILES(x86)%\ToolsUpdatePlatform%WINDIR%\SysWOW64\config\systemprofile\AppData\Roaming\CalendarTool%WINDIR%\System32\config\systemprofile\AppData\Roaming\CalendarTool
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