Blockandsurf

By GoldSparrow in Adware

Threat Scorecard

Popularity Rank:	5,831
Threat Level:	20 % (Normal)
Infected Computers:	236,905

First Seen:	March 17, 2014
Last Seen:	January 18, 2026
OS(es) Affected:	Windows

Blockandsurf is a Web browser add-on that is classified as a Potentially Unwanted Program by PC security researchers. Although Blockandsurf is advertised as a way of avoiding unwanted content when browsing the Web, the fact is that Blockandsurf may expose the affected Web browser to plenty of unwanted content. Because of this, PC security analysts consider that using Blockandsurf is not worth the trouble of dealing with its various unwanted outcomes, regardless of any supposed services or benefits that Blockandsurf is marketed as having. Security analysts advise removing Blockandsurf entirely from the affected computer. Because Blockandsurf is often designed to prevent easy removal and may also expose the affected computer to potentially harmful online content, PC security researchers advise computer users to get the intervention of a reliable security product to examine the affected computer after uninstalling Blockandsurf and as part of the removal procedure.

Table of Contents

How to Avoid the Installation of PUPs such as Blockandsurf

In most cases, Blockandsurf is installed automatically. A common way of distributing programs like Blockandsurf is by bundling them with freeware downloaded from a dubious source. Typically, the computer user may have the option of opting out of installing the PUP. However, in many cases, the computer user may overlook this option or it may be hidden from view. To prevent PUPs like Blockandsurf from being installed automatically, it is important to observe the installation method of any new software attentively and to use custom installation to make sure that the components being installed are the ones you want.

Stopping Unwanted Problems Caused by an Unwanted Tool

Malware analysts have received reports of various problems linked to Blockandsurf. Some symptoms associated with Blockandsurf may include Web browser redirects, pop-ups and new tabs. Blockandsurf may also make changes to the affected Web browser's settings, such as creating a new default home page or default search engine automatically. Blockandsurf may cause performance problems on affected computers. Some typical performance issues may include general slowness, problems connecting to the Internet, freezing and frequent crashes on the affected computer.

SpyHunter Detects & Remove Blockandsurf

File System Details

Blockandsurf may create the following file(s):

Expand All | Collapse All

#	File Name	MD5	Detections Detections: The number of confirmed and suspected cases of a particular threat detected on infected computers as reported by SpyHunter.
1.	J6BlockAndSurfR79.exe.vir	9b8cacc4d29852edf5420bd4f0b7554c	1,706
Name: J6BlockAndSurfR79.exe.vir MD5: 9b8cacc4d29852edf5420bd4f0b7554c Size: 749.05 KB (749056 bytes) Detections: 1,706 Path: %SYSTEMDRIVE%\Users\<username>\Desktop\New folder\AdwCleaner\Quarantine\C\Program Files\ver1BlockAndSurf\J6BlockAndSurfR79.exe.vir Group: Malware file Last Updated: September 9, 2020
2.	m8BlockAndSurfZ31.exe	bef6fc2fad956fa046e868c8ca1be4c5	1,508
Name: m8BlockAndSurfZ31.exe MD5: bef6fc2fad956fa046e868c8ca1be4c5 Size: 515.07 KB (515072 bytes) Detections: 1,508 Type: Executable File Path: %PROGRAMFILES(x86)%\ver4BlockAndSurf Group: Malware file Last Updated: February 24, 2020
3.	J6BlockAndSurfR79.exe	4b662edc6862d9c5c56bf3dfa0005322	1,413
Name: J6BlockAndSurfR79.exe MD5: 4b662edc6862d9c5c56bf3dfa0005322 Size: 522.24 KB (522240 bytes) Detections: 1,413 Type: Executable File Path: %PROGRAMFILES%\ver1BlockAndSurf Group: Malware file Last Updated: August 28, 2021
4.	R0BlockAndSurfQ33.exe.vir	4eef0103c74775ea6352cb8c10917a1b	1,301
Name: R0BlockAndSurfQ33.exe.vir MD5: 4eef0103c74775ea6352cb8c10917a1b Size: 733.18 KB (733184 bytes) Detections: 1,301 Path: C:\Users\<username>\Desktop\Nuova cartella (2)\GIOVANNA\AdwCleaner\Quarantine\C\Programmi\ver1BlockAndSurf\R0BlockAndSurfQ33.exe.vir Group: Malware file Last Updated: December 12, 2021
5.	J4BlockAndSurfJ52.exe	e97306e92a12420f91b8f75d7a3f79cd	1,150
Name: J4BlockAndSurfJ52.exe MD5: e97306e92a12420f91b8f75d7a3f79cd Size: 512 KB (512000 bytes) Detections: 1,150 Type: Executable File Path: %PROGRAMFILES%\version92BlockAndSurf Group: Malware file Last Updated: April 9, 2016
6.	trz1130.tmp	ef70bec82a5bd3fb2756fbce12687ca0	1,018
Name: trz1130.tmp MD5: ef70bec82a5bd3fb2756fbce12687ca0 Size: 129.53 KB (129536 bytes) Detections: 1,018 Type: Temporary File Path: C:\Program Files (x86)\ver4BlockAndSurf\trz1130.tmp Group: Malware file Last Updated: December 21, 2020
7.	F3BlockAndSurft.exe	972a76f6006afa6c64c1407a767c4063	985
Name: F3BlockAndSurft.exe MD5: 972a76f6006afa6c64c1407a767c4063 Size: 158.2 KB (158208 bytes) Detections: 985 Type: Executable File Path: C:\Program Files\ver8BlockAndSurf\F3BlockAndSurft.exe Group: Malware file Last Updated: April 30, 2021
8.	Q6BlockAndSurfw24.exe	dcfd0dbd6dd3d36b82f11aaf3113b087	791
Name: Q6BlockAndSurfw24.exe MD5: dcfd0dbd6dd3d36b82f11aaf3113b087 Size: 515.07 KB (515072 bytes) Detections: 791 Type: Executable File Path: %PROGRAMFILES(x86)%\ver5BlockAndSurf Group: Malware file Last Updated: September 15, 2020
9.	R0BlockAndSurfQ33.exe	7ce3ca31976ed0d4bd1faa7504d116bd	672
Name: R0BlockAndSurfQ33.exe MD5: 7ce3ca31976ed0d4bd1faa7504d116bd Size: 732.67 KB (732672 bytes) Detections: 672 Type: Executable File Path: %PROGRAMFILES%\ver0BlockAndSurf Group: Malware file Last Updated: April 9, 2016
10.	BlockAndSurf.exe.vir	528d4bd62ee3a1f8bc3077bd93b6bbfa	651
Name: BlockAndSurf.exe.vir MD5: 528d4bd62ee3a1f8bc3077bd93b6bbfa Size: 196.6 KB (196608 bytes) Detections: 651 Path: C:\Cosas de Sagra\AdwCleaner\Quarantine\C\Program Files (x86)\version92BlockAndSurf\BlockAndSurf.exe.vir Group: Malware file Last Updated: February 19, 2023
11.	I1BlockAndSurfI.exe	c09aafde52fc8ed9fc088ea3e45c7b91	648
Name: I1BlockAndSurfI.exe MD5: c09aafde52fc8ed9fc088ea3e45c7b91 Size: 158.72 KB (158720 bytes) Detections: 648 Type: Executable File Path: %PROGRAMFILES(x86)%\ver8BlockAndSurf Group: Malware file Last Updated: April 9, 2016
12.	BlockAndSurf.exe	1b539cbbde4d166939d46b883ae4b718	540
Name: BlockAndSurf.exe MD5: 1b539cbbde4d166939d46b883ae4b718 Size: 196.6 KB (196608 bytes) Detections: 540 Type: Executable File Path: C:\Program Files\ver1BlockAndSurf\BlockAndSurf.exe Group: Malware file Last Updated: November 8, 2021
13.	l6BlockAndSurfp84.exe	14a5478bd8f178fa8640d774494803e9	519
Name: l6BlockAndSurfp84.exe MD5: 14a5478bd8f178fa8640d774494803e9 Size: 557.05 KB (557056 bytes) Detections: 519 Type: Executable File Path: %PROGRAMFILES(x86)%\ver0BlockAndSurf Group: Malware file Last Updated: April 9, 2016
14.	H6BlockAndSurfe75.exe	64afbdfb76b59d6e25cadc3b8f7f8ad0	516
Name: H6BlockAndSurfe75.exe MD5: 64afbdfb76b59d6e25cadc3b8f7f8ad0 Size: 438.27 KB (438272 bytes) Detections: 516 Type: Executable File Path: C:\Program Files\ver8BlockAndSurf\H6BlockAndSurfe75.exe Group: Malware file Last Updated: April 30, 2021
15.	I8BlockAndSurfe10.exe	fd56eb62e0efed95f88f340612b5933e	486
Name: I8BlockAndSurfe10.exe MD5: fd56eb62e0efed95f88f340612b5933e Size: 515.07 KB (515072 bytes) Detections: 486 Type: Executable File Path: %PROGRAMFILES%\ver2BlockAndSurf Group: Malware file Last Updated: April 9, 2016
16.	186.dll	5daa7fa1faa2e49d5cbd055dc267a372	476
Name: 186.dll MD5: 5daa7fa1faa2e49d5cbd055dc267a372 Size: 512 KB (512000 bytes) Detections: 476 Type: Dynamic link library Path: %PROGRAMFILES%\ver1BlockAndSurf Group: Malware file Last Updated: April 4, 2020
17.	c6EN186.exe	df28a4fdf33e80cd22e94501bb566ad5	450
Name: c6EN186.exe MD5: df28a4fdf33e80cd22e94501bb566ad5 Size: 343.55 KB (343552 bytes) Detections: 450 Type: Executable File Path: %PROGRAMFILES%\ver8BlockAndSurf Group: Malware file Last Updated: December 13, 2016
18.	T8K.exe	e5f0ece7159491b6a7a0fa14c66d4242	444
Name: T8K.exe MD5: e5f0ece7159491b6a7a0fa14c66d4242 Size: 329.21 KB (329216 bytes) Detections: 444 Type: Executable File Path: %PROGRAMFILES%\ver8BlockAndSurf Group: Malware file Last Updated: December 13, 2016
19.	u5BlockAndSurfr61.exe	40ba7b348f039b52a760857545b43e56	429
Name: u5BlockAndSurfr61.exe MD5: 40ba7b348f039b52a760857545b43e56 Size: 497.15 KB (497152 bytes) Detections: 429 Type: Executable File Path: %PROGRAMFILES%\ver0BlockAndSurf Group: Malware file Last Updated: December 13, 2016
20.	a7BlockAndSurfZF176.exe	7d4f9571bf42e10012d5f6c897841328	421
Name: a7BlockAndSurfZF176.exe MD5: 7d4f9571bf42e10012d5f6c897841328 Size: 195.58 KB (195584 bytes) Detections: 421 Type: Executable File Path: %PROGRAMFILES(x86)%\ver2BlockAndSurf Group: Malware file Last Updated: December 13, 2016
21.	H0BlockAndSurfD34.exe	2665e220a30bea23a00adf5904d5f420	408
Name: H0BlockAndSurfD34.exe MD5: 2665e220a30bea23a00adf5904d5f420 Size: 438.78 KB (438784 bytes) Detections: 408 Type: Executable File Path: %PROGRAMFILES(x86)%\ver5BlockAndSurf Group: Malware file Last Updated: December 13, 2016
22.	178.dll	eb249e7bcd73b2619c9aabb1f6a7ca4d	408
Name: 178.dll MD5: eb249e7bcd73b2619c9aabb1f6a7ca4d Size: 233.98 KB (233984 bytes) Detections: 408 Type: Dynamic link library Path: %PROGRAMFILES%\ver4BlockAndSurf Group: Malware file Last Updated: February 24, 2020
23.	184.dll	4bd4d8edff43f4bdc8a925280a2c252d	407
Name: 184.dll MD5: 4bd4d8edff43f4bdc8a925280a2c252d Size: 262.65 KB (262656 bytes) Detections: 407 Type: Dynamic link library Path: %PROGRAMFILES%\ver7BlockAndSurf Group: Malware file Last Updated: December 13, 2016
24.	W8bi188.exe	8010cf4d55f2c99f365103f4cd79b2b4	392
Name: W8bi188.exe MD5: 8010cf4d55f2c99f365103f4cd79b2b4 Size: 347.64 KB (347648 bytes) Detections: 392 Type: Executable File Path: %PROGRAMFILES%\ver0BlockAndSurf Group: Malware file Last Updated: December 13, 2016
25.	180.dll	2ae74283ae2415f5b1a2b5b11bc0fbd1	384
Name: 180.dll MD5: 2ae74283ae2415f5b1a2b5b11bc0fbd1 Size: 330.24 KB (330240 bytes) Detections: 384 Type: Dynamic link library Path: %PROGRAMFILES%\ver1BlockAndSurf Group: Malware file Last Updated: December 13, 2016
26.	C7BlockAndSurfO84.exe	fefb6ce575ac8f84c60ae1105c915758	369
Name: C7BlockAndSurfO84.exe MD5: fefb6ce575ac8f84c60ae1105c915758 Size: 438.78 KB (438784 bytes) Detections: 369 Type: Executable File Path: %PROGRAMFILES(x86)%\ver8BlockAndSurf Group: Malware file Last Updated: December 13, 2016
27.	S1sV187.exe	6cf1205a7634b9b153e505b3e2d729f1	369
Name: S1sV187.exe MD5: 6cf1205a7634b9b153e505b3e2d729f1 Size: 347.64 KB (347648 bytes) Detections: 369 Type: Executable File Path: %PROGRAMFILES%\ver0BlockAndSurf Group: Malware file Last Updated: December 13, 2016
28.	g0BlockAndSurfN52.exe	3b86164aa0273d6fda185bfcaece71b2	345
Name: g0BlockAndSurfN52.exe MD5: 3b86164aa0273d6fda185bfcaece71b2 Size: 466.94 KB (466944 bytes) Detections: 345 Type: Executable File Path: %PROGRAMFILES(x86)%\ver2BlockAndSurf Group: Malware file Last Updated: December 13, 2016
29.	S3IK186.exe	815ad94806cd99941001e33ad46862d0	327
Name: S3IK186.exe MD5: 815ad94806cd99941001e33ad46862d0 Size: 343.55 KB (343552 bytes) Detections: 327 Type: Executable File Path: %PROGRAMFILES%\ver4BlockAndSurf Group: Malware file Last Updated: December 13, 2016

More files

Registry Details

Blockandsurf may create the following registry entry or registry entries:

CLSID

{D71A683E-C9E3-F804-9685-2A9D36B20547}

File name without path

http_block-n-surf.com_0.localstorage

http_block-n-surf.com_0.localstorage-journal

Regexp file mask

%windir%\System32\Tasks\BlockAndSurf Update

%windir%\System32\Tasks\BlockAndSurf_wd

%WinDir%\Tasks\BlockAndSurf Update.job

%WinDir%\Tasks\BlockAndSurf_wd.job

HKEY..\..\..\..{RegistryKeys}

Software\AppDataLow\Software\BlockAndSurf

SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\CompatibilityAdapter\Signatures\BlockAndSurf Update.job

SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\CompatibilityAdapter\Signatures\BlockAndSurf Update.job.fp

SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\CompatibilityAdapter\Signatures\BlockAndSurf_wd.job

SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\CompatibilityAdapter\Signatures\BlockAndSurf_wd.job.fp

SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\BlockAndSurf Update

SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\BlockAndSurf_wd

Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{D3EF7DD7-D040-0965-D2C3-A0ECE64E7E98}

Software\Microsoft\Windows\CurrentVersion\Ext\Stats\{D3EF7DD7-D040-0965-D2C3-A0ECE64E7E98}

Software\Microsoft\Windows\CurrentVersion\Run\BlockAndSurf

Software\Microsoft\Windows\CurrentVersion\Run\BlockNSurf

Software\Mozilla\Firefox\Extensions\{7D28CEA6-D0D4-A51C-042D-40679BCF0219}

Software\Mozilla\Firefox\Extensions\{828c786a-e911-4821-aabd-a58eff0dcf02}

Software\Mozilla\Firefox\Extensions\{C84E2F89-F883-97B9-5382-1226EEEAD045}

Software\Mozilla\Firefox\Extensions\{e7042136-bd19-4c7e-b6e3-8a360fd2f2aa}

SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\BlockAndSurf

SYSTEM\ControlSet001\services\BlockAndSurf

SYSTEM\ControlSet001\Services\{6fcd6092-9615-4f7f-8898-8df53980e5d2}Gw64

SYSTEM\ControlSet002\services\BlockAndSurf

SYSTEM\ControlSet002\Services\{6fcd6092-9615-4f7f-8898-8df53980e5d2}Gw64

SYSTEM\CurrentControlSet\services\BlockAndSurf

SYSTEM\CurrentControlSet\Services\{6fcd6092-9615-4f7f-8898-8df53980e5d2}Gw64

Directories

Blockandsurf may create the following directory or directories:

%PROGRAMFILES%\-BlockAndSurfS

%PROGRAMFILES%\BlockAndSurf Corp

%PROGRAMFILES%\BlockAndSurf-soft

%PROGRAMFILES%\BlockAndSurfS

%PROGRAMFILES%\di2BlockAndSurf

%PROGRAMFILES%\di3BlockAndSurf

%PROGRAMFILES%\di4BlockAndSurf

%PROGRAMFILES%\di5BlockAndSurf

%PROGRAMFILES%\di8BlockAndSurf

%PROGRAMFILES%\v01BlockAndSurf

%PROGRAMFILES%\ver3BlockAndSurf

%PROGRAMFILES(x86)%\-BlockAndSurf-soft

%PROGRAMFILES(x86)%\-BlockAndSurfS

%PROGRAMFILES(x86)%\BlockAndSurf Corp

%PROGRAMFILES(x86)%\BlockAndSurf-soft

%PROGRAMFILES(x86)%\BlockAndSurfS

%PROGRAMFILES(x86)%\BlockAndSurf_P

%PROGRAMFILES(x86)%\di2BlockAndSurf

%PROGRAMFILES(x86)%\di3BlockAndSurf

%PROGRAMFILES(x86)%\di4BlockAndSurf

%PROGRAMFILES(x86)%\di5BlockAndSurf

%PROGRAMFILES(x86)%\di8BlockAndSurf

%PROGRAMFILES(x86)%\v01BlockAndSurf

%PROGRAMFILES(x86)%\ver3BlockAndSurf

URLs

Blockandsurf may call the following URLs:

BlockAndSurf

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Blockandsurf

Threat Scorecard

EnigmaSoft Threat Scorecard

How to Avoid the Installation of PUPs such as Blockandsurf

Stopping Unwanted Problems Caused by an Unwanted Tool

SpyHunter Detects & Remove Blockandsurf

File System Details

Registry Details

Directories

URLs

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