WannaRen Surfaces as a New Strain of Ransomware Threat Alert

WannaRen Surfaces as a New Strain of Ransomware Threat Alert

abril 24, 2020 | Adeline Zhang


Recently, a new strain of ransomware WannaRen came to the surface and began to spread between PCs. This ransomware encrypts almost all files in the Windows system and uses .WannaRen as the extension of encrypted files. The attacker leaves a Bitcoin wallet address and demands 0.05 Bitcoin as ransom.

A preliminary analysis reveals that this ransomware would check the operating environment in advance, and will not run or encrypt files if it is in a virtual machine. Currently, it affects Windows 7 and Windows 10.

An infected computer will receive a ransom note like the following:


According to information on hand, Windows 7 and Windows 10 are vulnerable to this ransomware currently.


NSFOCUS recommends that users should not download or open files from suspicious sources, and should back up critical data in the system as soon as possible to mitigate the potential impact of this ransomware.

For more information about and related protections against this virus, please visit the official website and blog site of NSFOCUS.




This advisory is only used to describe a potential risk. NSFOCUS does not provide any commitment or promise on this advisory. NSFOCUS and the author will not bear any liability for any direct and/or indirect consequences and losses caused by transmitting and/or using this advisory. NSFOCUS reserves all the rights to modify and interpret this advisory. Please include this statement paragraph when reproducing or transferring this advisory. Do not modify this advisory, add/delete any information to/from it, or use this advisory for commercial purposes without permission from NSFOCUS.


NSFOCUS, Inc., a global network and cyber security leader, protects enterprises and carriers from advanced cyber attacks. The company’s Intelligent Hybrid Security strategy utilizes both cloud and on-premises security platforms, built on a foundation of real-time global threat intelligence, to provide multi-layered, unified and dynamic protection against advanced cyber attacks.

NSFOCUS works with Fortune Global 500 companies, including four of the world’s five largest financial institutions, organizations in insurance, retail, healthcare, critical infrastructure industries as well as government agencies. NSFOCUS has technology and channel partners in more than 60 countries, is a member of both the Microsoft Active Protections Program (MAPP), and the Cloud Security Alliance (CSA).

A wholly owned subsidiary of NSFOCUS Information Technology Co. Ltd., the company has operations in the Americas, Europe, the Middle East and Asia Pacific.