What is kotcatkcomksz?
The Malwarebytes research team has determined that kotcatkcomksz is adware. These adware applications display advertisements not originating from the sites you are browsing.
This particular one uses a Scheduled Task to open an ad-rotator window in the default browser.
How do I know if my computer is affected by kotcatkcomksz?
You may see this Scheduled Task:
How did kotcatkcomksz get on my computer?
Adware applications use different methods for distributing themselves. This particular one was installed by a bundler.
How do I remove kotcatkcomksz?
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.
- No, Malwarebytes removes kotcatkcomksz completely.
- This adware creates some scheduled tasks. You can read here how to check for and, if necessary, remove Scheduled Tasks.
We hope our application and this guide have helped you eradicate this adware.
As you can see below the full version of Malwarebytes would have protected you against the kotcatkcomksz adware. It would have blocked their domain.
and stopped the bundler from executing.
Technical details for experts
Possible signs in FRST logs:
C:\Windows\System32\Tasks\kotcatkcomksz Task: {BA2CA154-9D82-4FCE-86D5-3291A1D55983} - System32\Tasks\kotcatkcomksz => "C:\Program Files (x86)\Mozilla Firefox\firefox.exe" kotcatk.com/kszSignificant changes made by the installer:
In the existing folder C:\Windows\Tasks Adds the file kotcatkcomksz.job"="2/22/2018 9:01 AM, 310 bytes, AMalwarebytes log:
Malwarebytes www.malwarebytes.com -Log Details- Scan Date: 2/22/18 Scan Time: 9:06 AM Log File: 52b32325-17a7-11e8-9e11-080027750297.json Administrator: Yes -Software Information- Version: 3.3.1.2183 Components Version: 1.0.262 Update Package Version: 1.0.4044 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: 243596 Threats Detected: 13 Threats Quarantined: 13 Time Elapsed: 1 min, 53 sec -Scan Options- Memory: Enabled Startup: Enabled Filesystem: Enabled Archives: Enabled Rootkits: Disabled Heuristics: Enabled PUP: Detect PUM: Detect -Scan Details- Process: 0 (No malicious items detected) Module: 0 (No malicious items detected) Registry Key: 3 Adware.StartPage.BatBitRst, HKLM\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\SCHEDULE\TASKCACHE\TREE\KOTCATKCOMKSZ, Quarantined, [7758], [491051],1.0.4044 Adware.StartPage.BatBitRst, HKLM\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\SCHEDULE\TASKCACHE\TASKS\{BA2CA154-9D82-4FCE-86D5-3291A1D55983}, Quarantined, [7758], [491051],1.0.4044 Adware.StartPage.BatBitRst, HKLM\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\SCHEDULE\TASKCACHE\LOGON\{BA2CA154-9D82-4FCE-86D5-3291A1D55983}, Quarantined, [7758], [491051],1.0.4044 Registry Value: 1 Adware.StartPage.BatBitRst, HKLM\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\SCHEDULE\TASKCACHE\TASKS\{BA2CA154-9D82-4FCE-86D5-3291A1D55983}|PATH, Quarantined, [7758], [491053],1.0.4044 Registry Data: 0 (No malicious items detected) Data Stream: 0 (No malicious items detected) Folder: 0 (No malicious items detected) File: 9 Adware.StartPage.BatBitRst, C:\WINDOWS\SYSTEM32\TASKS\KOTCATKCOMKSZ, Quarantined, [7758], [491051],1.0.4044 Adware.StartPage.BatBitRst, C:\DOCUMENTS AND SETTINGS\ALL USERS\APPLICATION DATA\MICROSOFT\NETWORK\DOWNLOADER\QMGR0.DAT, Quarantined, [7758], [-1],0.0.0 Adware.StartPage.BatBitRst, C:\PROGRAMDATA\APPLICATION DATA\MICROSOFT\NETWORK\DOWNLOADER\QMGR0.DAT, Quarantined, [7758], [-1],0.0.0 Adware.StartPage.BatBitRst, C:\DOCUMENTS AND SETTINGS\ALL USERS\APPLICATION DATA\MICROSOFT\NETWORK\DOWNLOADER\QMGR1.DAT, Quarantined, [7758], [-1],0.0.0 Adware.StartPage.BatBitRst, C:\PROGRAMDATA\APPLICATION DATA\MICROSOFT\NETWORK\DOWNLOADER\QMGR1.DAT, Quarantined, [7758], [-1],0.0.0 Adware.StartPage.BatBitRst, C:\DOCUMENTS AND SETTINGS\ALL USERS\MICROSOFT\NETWORK\DOWNLOADER\QMGR0.DAT, Quarantined, [7758], [-1],0.0.0 Adware.StartPage.BatBitRst, C:\PROGRAMDATA\MICROSOFT\NETWORK\DOWNLOADER\QMGR0.DAT, Quarantined, [7758], [-1],0.0.0 Adware.StartPage.BatBitRst, C:\DOCUMENTS AND SETTINGS\ALL USERS\MICROSOFT\NETWORK\DOWNLOADER\QMGR1.DAT, Quarantined, [7758], [-1],0.0.0 Adware.StartPage.BatBitRst, C:\PROGRAMDATA\MICROSOFT\NETWORK\DOWNLOADER\QMGR1.DAT, Quarantined, [7758], [-1],0.0.0 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