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Removal instructions for CYAK

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What is CYAK?

The Malwarebytes research team has determined that CYAK is a fake anti-malware application. These so-called "rogues" use intentional false positives to convince users that their systems have been compromised. Then they try to sell you their software, claiming it will remove these threats. In extreme cases the false threats are actually the very trojans that advertise or even directly install the rogue. You are strongly advised to follow our removal instructions below.

How do I know if I am infected with CYAK?

This is how the main screen of the rogue application looks:

main.png

You will find these icons on your desktop and in your taskbar:

icons.png

And see these warnings:

warning1.png

warning2.png

warning3.png

How did CYAK get on my computer?

Rogue programs use different methods for spreading themselves. This particular one was downloaded from their site..

How do I remove CYAK?

Our program Malwarebytes' Anti-Malware can detect and remove this rogue application.

  • Please download Malwarebytes' Anti-Malware to your desktop.
  • Double-click mbam-setup.exe and follow the prompts to install the program.
  • At the end, be sure a check-mark is placed next to the following:
    • Update Malwarebytes' Anti-Malware
    • Launch Malwarebytes' Anti-Malware

    [*]Then click Finish.

    [*]If an update is found, it will download and install the latest version.

    [*]Once the program has loaded, select Perform quick scan, then click Scan.

    [*]When the scan is complete, click OK, then Show Results to view the results.

    [*]Be sure that everything is checked, and click Remove Selected. Reboot your computer if prompted.

    [*]When completed, a log will open in Notepad. The rogue application should now be gone.

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

  • The shortcut called CYAK on the desktop can be deleted if it belonged to the rogue. If you are unsure compare the icon to the one posted above.

How would the full version of Malwarebytes' Anti-Malware help protect me?

We hope our application has helped you eradicate this malicious software. If your current security solution let this infection through, you might please consider purchasing the FULL version of Malwarebytes' Anti-Malware for additional protection.

As you can see below the full version of Malwarebytes' Anti-Malware would have protected you against the CYAK rogue. It would have warned you before the rogue could install itself, giving you a chance to stop it before it became too late.

protection1.png

Technical details for experts

Signs in a HijackThis log:

C:\Program Files\CYAK\cyakux.exe

O4 - HKCU\..\Run: [CYAK] C:\Program Files\CYAK\cyakup.exe

Alterations made by the installer:



File System
===============
In the existing folder C:\Documents and Settings\{username}\Desktop
Adds the file CYAK.lnk"="10:07 18/01/12 1462 bytes
In the existing folder C:\Documents and Settings\{username}\Start Menu
Adds the file CYAK.lnk"="10:07 18/01/12 1462 bytes
Adds the folder C:\Program Files\CYAK
Adds the file uninstall.exe"="10:04 18/01/12 86016 bytes
Adds the file libmysql.dll"="10:04 18/01/12 249856 bytes
Adds the file cyakux.exe"="10:04 18/01/12 2633728 bytes
Adds the file cyakup.exe"="10:07 18/01/12 86016 bytes
Adds the file cyakicon.ico"="10:04 18/01/12 17542 bytes
Adds the file cyakeye.exe"="10:04 18/01/12 180224 bytes
Adds the folder C:\Program Files\CYAK\YakTong
Adds the file DBCapsule042.cft"="10:07 18/01/12 145620 bytes
Adds the file DBCapsule041.cft"="10:07 18/01/12 125581 bytes
Adds the file DBCapsule040.cft"="10:07 18/01/12 29596 bytes
Adds the file DBCapsule039.cft"="10:07 18/01/12 31569 bytes
Adds the file DBCapsule038.cft"="10:06 18/01/12 22884 bytes
Adds the file DBCapsule037.cft"="10:06 18/01/12 34729 bytes
Adds the file DBCapsule036.cft"="10:06 18/01/12 27302 bytes
Adds the file DBCapsule035.cft"="10:06 18/01/12 29460 bytes
Adds the file DBCapsule034.cft"="10:06 18/01/12 29888 bytes
Adds the file DBCapsule033.cft"="10:06 18/01/12 30874 bytes
Adds the file DBCapsule032.cft"="10:06 18/01/12 31476 bytes
Adds the file DBCapsule031.cft"="10:06 18/01/12 20800 bytes
Adds the file DBCapsule030.cft"="10:06 18/01/12 28365 bytes
Adds the file DBCapsule029.cft"="10:06 18/01/12 26391 bytes
Adds the file DBCapsule028.cft"="10:06 18/01/12 19109 bytes
Adds the file DBCapsule027.cft"="10:06 18/01/12 19735 bytes
Adds the file DBCapsule026.cft"="10:06 18/01/12 27929 bytes
Adds the file DBCapsule025.cft"="10:06 18/01/12 26699 bytes
Adds the file DBCapsule024.cft"="10:06 18/01/12 28527 bytes
Adds the file DBCapsule023.cft"="10:06 18/01/12 11416 bytes
Adds the file DBCapsule022.cft"="10:06 18/01/12 3740 bytes
Adds the file DBCapsule021.cft"="10:06 18/01/12 17586 bytes
Adds the file DBCapsule020.cft"="10:06 18/01/12 8276 bytes
Adds the file DBCapsule019.cft"="10:06 18/01/12 33167 bytes
Adds the file DBCapsule018.cft"="10:06 18/01/12 166244 bytes
Adds the file DBCapsule017.cft"="10:06 18/01/12 230121 bytes
Adds the file DBCapsule016.cft"="10:05 18/01/12 209418 bytes
Adds the file DBCapsule015.cft"="10:05 18/01/12 207475 bytes
Adds the file DBCapsule014.cft"="10:05 18/01/12 167998 bytes
Adds the file DBCapsule013.cft"="10:05 18/01/12 232224 bytes
Adds the file DBCapsule012.cft"="10:05 18/01/12 232169 bytes
Adds the file DBCapsule011.cft"="10:05 18/01/12 203096 bytes
Adds the file DBCapsule010.cft"="10:05 18/01/12 246586 bytes
Adds the file DBCapsule009.cft"="10:05 18/01/12 197251 bytes
Adds the file DBCapsule008.cft"="10:05 18/01/12 241313 bytes
Adds the file DBCapsule007.cft"="10:05 18/01/12 233457 bytes
Adds the file DBCapsule006.cft"="10:04 18/01/12 177283 bytes
Adds the file DBCapsule005.cft"="10:04 18/01/12 247673 bytes
Adds the file DBCapsule004.cft"="10:04 18/01/12 249015 bytes
Adds the file DBCapsule003.cft"="10:04 18/01/12 259309 bytes
Adds the file DBCapsule002.cft"="10:04 18/01/12 223744 bytes
Adds the file DBCapsule001.cft"="10:04 18/01/12 253789 bytes
Adds the file DBCapsule000.cft"="10:04 18/01/12 246228 bytes

Registry
===============
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\cyakup.exe]
"(Default)"="'C:\Program Files\CYAK\cyakup.exe'"
[HKEY_CURRENT_USER\Software\CYAK]
"Update"="'1'"
"Inst"="'C:\Program Files\CYAK'"
[HKEY_CURRENT_USER\Software\CYAK\Update]
[HKEY_CURRENT_USER\Software\CYAK\Setup]
"AutoRun"="'0'"
"Tray"="'0'"
[HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\CYAK\Settings]
[HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\CYAK\Recent File List]
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\CYAK]
"UninstallString"="'C:\Program Files\CYAK\uninstall.exe'"
"DisplayName"="'CYAK'"
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]
"CYAK"="'C:\Program Files\CYAK\cyakup.exe'"


Malwarebytes' Anti-Malware log:

Malwarebytes Anti-Malware 1.60.0.1800
www.malwarebytes.org

Database version: v2012.01.18.02

Windows XP Service Pack 3 x86 NTFS
Internet Explorer 8.0.6001.18702
{username} :: MBAM-D3E8C91ACC [administrator]

1/18/2012 10:16:27 AM
mbam-log-2012-01-18 (10-16-27).txt

Scan type: Quick scan
Scan options enabled: Memory | Startup | Registry | File System | Heuristics/Extra | Heuristics/Shuriken | PUP | PUM
Scan options disabled: P2P
Objects scanned: 150124
Time elapsed: 1 minute(s), 11 second(s)

Memory Processes Detected: 1
C:\Program Files\CYAK\cyakux.exe (Trojan.FakeAV.K) -> 1700 -> Delete on reboot.

Memory Modules Detected: 1
C:\Program Files\CYAK\libmysql.dll (Trojan.FakeAV.K) -> Delete on reboot.

Registry Keys Detected: 3
HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\CYAK (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
HKCU\Software\Local AppWizard-Generated Applications\CYAK (Rogue.CYAK) -> Quarantined and deleted successfully.
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\cyakup.exe (Rogue.CYAK) -> Quarantined and deleted successfully.

Registry Values Detected: 2
HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run|CYAK (Trojan.Downloader.K) -> Data: C:\Program Files\CYAK\cyakup.exe -> Quarantined and deleted successfully.
HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\CYAK|UninstallString (Trojan.FakeAV.K) -> Data: C:\Program Files\CYAK\uninstall.exe -> Quarantined and deleted successfully.

Registry Data Items Detected: 0
(No malicious items detected)

Folders Detected: 2
C:\Program Files\CYAK (Trojan.FakeAV.K) -> Delete on reboot.
C:\Program Files\CYAK\YakTong (Trojan.FakeAV.K) -> Quarantined and deleted successfully.

Files Detected: 51
C:\Program Files\CYAK\cyakux.exe (Trojan.FakeAV.K) -> Delete on reboot.
C:\Program Files\CYAK\cyakup.exe (Trojan.Downloader.K) -> Quarantined and deleted successfully.
C:\Documents and Settings\{username}\Desktop\CYAK_Setup.exe (Rogue.Installer) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\cyakicon.ico (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\cyakeye.exe (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\libmysql.dll (Trojan.FakeAV.K) -> Delete on reboot.
C:\Program Files\CYAK\uninstall.exe (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule005.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule022.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule006.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule007.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule008.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule009.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule010.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule011.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule012.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule013.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule014.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule015.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule016.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule017.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule018.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule019.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule020.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule021.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule023.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule024.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule025.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule026.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule027.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule028.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule029.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule030.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule031.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule032.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule033.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule034.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule035.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule036.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule037.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule038.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule039.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule040.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule041.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule042.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule000.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule001.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule002.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule003.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Program Files\CYAK\YakTong\DBCapsule004.cft (Trojan.FakeAV.K) -> Quarantined and deleted successfully.
C:\Documents and Settings\{username}\Start Menu\CYAK.lnk (Trojan.FakeAV.K) -> Quarantined and deleted successfully.

(end)

As mentioned before the full version of Malwarebytes' Anti-Malware 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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