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What is Multy App?

The Malwarebytes research team has determined that Multy App is a search hijacker. These so-called "hijackers" manipulate your browser(s), for example to change your startpage or searchscopes, so that the affected browser visits their site or one of their choice. This one also displays advertisements.

How do I know if my computer is affected by Multy App?

You may see this entry in your list of installed Chrome extensions:

main.png

and these warnings during install:

warning1.png

warning2.png

warning3.png

warning4.png

and this changed search setting:

warning5.png

How did Multy App get on my computer?

Browser hijackers use different methods for distributing themselves. This particular one was downloaded from their website:

website.png

but it was also available in the webstore:

webstore.png

How do I remove Multy App?

Our program Malwarebytes can detect and remove this potentially unwanted program.

  • Please download Malwarebytes to your desktop.
  • Double-click mb3-setup-consumer-{version}.exe and follow the prompts to install the program.
  • Then click Finish.
  • Once the program has fully updated, select Scan Now on the Dashboard. Or select the Threat Scan from the Scan menu.
  • If another update of the definitions is available, it will be implemented before the rest of the scanning procedure.
  • When the scan is complete, make sure that all Threats are selected, and click Remove Selected.
  • Restart your computer when prompted to do so.

Is there anything else I need to do to get rid of Multy App?

  • No, Malwarebytes removes Multy App completely.
  • This PUP creates some scheduled tasks. You can read here how to check for and, if necessary, remove Scheduled Tasks.

How would the full version of Malwarebytes help protect me?

We hope our application and this guide have helped you eradicate this hijacker.

As you can see below the full version of Malwarebytes would have protected you against the Multy App hijacker. It would have blocked the website:
 

protection2.png


Technical details for experts

Possible signs in FRST logs:
 

CHR DefaultSearchURL: Default -> hxxps://searchmulty.com/results.php?pub=2033&v=415&q={searchTerms}
CHR DefaultSearchKeyword: Default -> Multy
CHR Extension: (Multy) - C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja [2018-08-28]

Alterations made by the installer:
 

File system details [View: All details] (Selection)
---------------------------------------------------
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0
       Adds the file background.js"="7/26/2018 11:19 AM, 203 bytes, A
       Adds the file index.html"="7/26/2018 11:16 AM, 12982 bytes, A
       Adds the file manifest.json"="8/28/2018 8:53 AM, 1789 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\_metadata
       Adds the file computed_hashes.json"="8/28/2018 8:53 AM, 3444 bytes, A
       Adds the file verified_contents.json"="7/26/2018 11:03 AM, 2293 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\c
       Adds the file s.css"="7/26/2018 11:18 AM, 17980 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\icons
       Adds the file button.png"="8/28/2018 8:53 AM, 941 bytes, A
       Adds the file icon128.png"="8/28/2018 8:53 AM, 16644 bytes, A
       Adds the file icon48.png"="8/28/2018 8:53 AM, 286 bytes, A
       Adds the file icon64.png"="8/28/2018 8:53 AM, 5713 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\s
       Adds the file jquery.js"="8/2/2016 4:07 PM, 97166 bytes, A
       Adds the file s.js"="5/28/2018 7:36 PM, 61702 bytes, A

Registry details [View: All details] (Selection)
------------------------------------------------
    [HKEY_CURRENT_USER\Software\Google\Chrome\PreferenceMACs\Default\extensions.settings]
       "jgfdjdipohonjjlikeimedkgjbjdhhja"="REG_SZ", "D51261FDB60B133E0FCE36575D20DFC9BEA6BF446FECC1E1040CFA8133FBD57B"

Malwarebytes log:
 

Malwarebytes
www.malwarebytes.com

-Log Details-
Scan Date: 8/28/18
Scan Time: 9:05 AM
Log File: bb29b180-aa90-11e8-a61d-00ffdcc6fdfc.json
Administrator: Yes

-Software Information-
Version: 3.5.1.2522
Components Version: 1.0.391
Update Package Version: 1.0.6533
License: Premium

-System Information-
OS: Windows 7 Service Pack 1
CPU: x64
File System: NTFS
User: {computername}\{username}

-Scan Summary-
Scan Type: Threat Scan
Scan Initiated By: Manual
Result: Completed
Objects Scanned: 252271
Threats Detected: 20
Threats Quarantined: 20
Time Elapsed: 3 min, 15 sec

-Scan Options-
Memory: Enabled
Startup: Enabled
Filesystem: Enabled
Archives: Enabled
Rootkits: Enabled
Heuristics: Enabled
PUP: Detect
PUM: Detect

-Scan Details-
Process: 0
(No malicious items detected)

Module: 0
(No malicious items detected)

Registry Key: 0
(No malicious items detected)

Registry Value: 0
(No malicious items detected)

Registry Data: 0
(No malicious items detected)

Data Stream: 0
(No malicious items detected)

Folder: 6
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\_metadata, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\icons, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\c, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\s, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\EXTENSIONS\jgfdjdipohonjjlikeimedkgjbjdhhja, Quarantined, [341], [557474],1.0.6533

File: 14
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\c\s.css, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\icons\button.png, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\icons\icon128.png, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\icons\icon48.png, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\icons\icon64.png, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\s\jquery.js, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\s\s.js, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\_metadata\computed_hashes.json, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\_metadata\verified_contents.json, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\background.js, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\index.html, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\jgfdjdipohonjjlikeimedkgjbjdhhja\1.1_0\manifest.json, Quarantined, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Secure Preferences, Replaced, [341], [557474],1.0.6533
PUP.Optional.SearchMulty, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Preferences, Replaced, [341], [557474],1.0.6533

Physical Sector: 0
(No malicious items detected)

WMI: 0
(No malicious items detected)


(end)

As mentioned before the full version of Malwarebytes could have protected your computer against this threat.
We use different ways of protecting your computer(s):

  • Dynamically Blocks Malware Sites & Servers
  • Malware Execution Prevention

Save yourself the hassle and get protected.

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