Published Feb 04, 2011 | Updated Sep 15, 2017


Severe |Detected with Windows Defender Antivirus

Aliases: Win-Trojan/Calelk.51200 (AhnLab) Trojan-Ransom.Win32.PornoBlocker.dki (Kaspersky) Trojan.PornoBlocker!G4H3C57t6/Y (VirusBuster) TR/Ransom.PornoBlocker.dki.1 (Avira) Win32/RansomLockscreen.C!ISIgene (CA) Win32/LockScreen.QX (ESET) Trojan-Ransom.Win32.PornoBlocker (Ikarus) Ransom!cu (McAfee) TROJ_RANSOM.JM (Trend Micro)


Trojan:Win32/Calelk.A is a trojan that gains control of the infected computer by locking the screen and preventing the user from using the computer. It then prompts the user to send an SMS to a premium number. Some variants may display adult images.
To detect and remove this threat and other malicious software that may be installed on your computer, run a full-system scan with an appropriate, up-to-date, security solution. The following Microsoft products will detect and remove this threat:
For more information on antivirus software, see
Follow us