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What is Flash-paivitys?

The Malwarebytes research team has determined that Flash-paivitys is adware and a spamtool. This particular one installs a Facebook app that consequently sends out spam messages to all the user groups you belong to.
The Facebook apps will have a name that users do not immediately associate with messaging like HTC Sense, Spotify, or Pandora.

How do I know if my computer is affected by Flash-paivitys?

You may see these warnings during install:

warning1.png

warning2.png

and you may notice this Firefox extension:

main.png

After the install you may see spam mesages go out that look similar to this:

FBmesaage.png

The message is in (non-fluent) Finnish and tells readers to Google for a certain key-phrase. At prime time of the infection there would be a sponsored result waiting for them, but now they will find a Scam Alert.
The intended landing page would try to scam users into buying fake or non-existing high-end products.

This particular one was offered as a fake Flash update (in Finnish).

website.png

How do I remove Flash-paivitys?

Our program Malwarebytes can detect and remove this 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 Flash-paivitys?

  • No, Malwarebytes removes Flash-paivitys completely.
  • Affected users will have to find and remove the offending app from their Facebook account.

How would the full version of Malwarebytes help protect me?

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

We protect our customers from these extensions by blocking the sites that spread them:

protection2.png

Technical details for experts

Possible signs in FRST logs:
 

 FF Extension: No Name - C:\Users\{username}\AppData\Roaming\Mozilla\Firefox\Profiles\{profile}.default\Extensions\adsfinland@firefox.pl.xpi [2018-04-05]

Alterations made by the installer:
 

File system details [View: All details] (Selection)
---------------------------------------------------
   Adds the folder C:\Users\{username}\AppData\Roaming\Mozilla\Firefox\Profiles\{profile}.default\extensions
       Adds the file adsfinland@firefox.pl.xpi"="4/5/2018 10:45 AM, 102813 bytes, A

Malwarebytes log:
 

Malwarebytes
www.malwarebytes.com

-Log Details-
Scan Date: 4/5/18
Scan Time: 10:58 AM
Log File: 90e4efa1-38af-11e8-abc9-080027235d76.json
Administrator: Yes

-Software Information-
Version: 3.3.1.2183
Components Version: 1.0.262
Update Package Version: 1.0.4624
License: Premium

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

-Scan Summary-
Scan Type: Threat Scan
Result: Completed
Objects Scanned: 245049
Threats Detected: 1
Threats Quarantined: 1
Time Elapsed: 2 min, 43 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: 0
(No malicious items detected)

File: 1
Adware.FBSpammer, C:\USERS\{username}\APPDATA\ROAMING\MOZILLA\FIREFOX\PROFILES\{profile}.default\EXTENSIONS\ADSFINLAND@FIREFOX.PL.XPI, Quarantined, [1704], [506269],1.0.4624

Physical Sector: 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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