WannaCry is also known as WannaCrypt, WanaCrypt0r 2.0, Wanna Decryptor has affected more than 70 countries in an unprecedented attack which was launched on 12th May 2017.
Very recently Shadow brokers had leaked the US Spy agencies hacking tools and vulnerabilities and one of them was Eternal Blue exploit which relied on a SMB Exploit to hack into other connected / networked PCs in a network. So far the Ransomware has affected over 200K computers all over the globe.
How can it impact you:
WannaCry Ransomware has targeted worldwide across industries to individual users, mainly known are healthcare, financial, manufacturing and government segments were the victims of the sever attack. This has resulted in sudden crippling of businesses to individual with valuable loss of sensitive data. Some estimates also are of that, the attack also exploited to capture banking information for people who had paid the ransoms in bitcoins. This Ransomware has also caused reputation losses for many businesses and trust among its customers. The demand of $300 for decrypt key by the attackers were not an assurance to receive the keys and instances were also reported where the attackers have doubles the demand money if not paid within 48 hours and after the seven day deadline the files gets completely deleted.
WannaCry Ransomware exploited the vulnerability of Windows Operating System discovered by NSA earlier and Microsoft had already provided the patch on 14 March with an advisory to update the systems. India being one of the largest legacy system users as well many pirated software users among individuals is one of the most vulnerable countries in terms of the spread possibilities of WannaCry. Hence, the users need to take utmost precaution to find the possible vulnerability in their network and system immediately and use the patch update to safeguard any probable exploit. According the admission of the Indian Government 70% of Indian ATMs out of the 2.19 Lac ATMs are still running on Windows XP, hence RBI has issued an advisory to patch all the ATMs before resuming their normal banking operations, with immediate effect.
How does eScan protect against Ransomware attacks:
eScan’s Proactive Behavioral Analysis Engine (PBAE) monitors the activity of all processes on the Local Machine and when it encounters any activity or behavior that matches to a Ransomware, a red flag is raised and the process is blocked. In case if an infected system tries to access network share of a protected system and encrypt/ modify files residing on that system, PBAE will immediately invalidate the network session.
Along with WannaCry, PBAE is also successfully blocking Ransomware attacks such as Locky, Zepto, Crysis and many more. Additionally, by analyzing the data collected through our Cloud (ESN) we are able to successfully detect and mitigate thousands of Ransomware attacks on every system that is protected with eScan Worldwide.
eScan’s Active Virus Control (AVC) also proactively protects the system from infection, when it is being executed in real-time. It’s not just the PBAE but also the AVC which identifies, and blocks the execution of malware / Trojans including Ransomware of all types and variants.
Statistics
As per the eScan R&D, the telemetry data collected from its Cloud Server, shows that by 14th May 2017 the WannaCry infection has reduced after spike in infections after the breakout on 12th May. However, since past two days being holidays and the advisories being released worldwide, infections may reduce, while there would a rise in detection of WannaCry infection attempts.
Moreover, since humans are the weakest link in the entire ecosystem of IT Security, we believe that although advisories have been released and everyone has been made aware of WannaCry attack, an employee advisory should be circulated internally not to click or try opening any attachments from unknown sources received through emails and the Security Administrators should implement the patch issued by Microsoft across the Windows Systems in their network.
The threat report can be viewed by visiting this link https://www.escanav.com/en/threat-report/
WannaCry File Extensions
WannaCry after encrypting the files changes the extension to one of the below mentioned :
• WNCYR
• WCRY
• .WCRYT
• .WNCRY
• .WNCRYT
• .WNRY
Prevention Measures:
• Download and implement MS17-010 patch, from the below link :
https://technet.microsoft.com/en-us/library/security/ms17-010.aspx
• Administrators should block all executable files from being transmitted via eMails.
• Administrators should isolate the affected system in the Network.
• Administrator can restore the encrypted files from the backup or from system restore point (if enabled) for affected systems.
• Install and Configure eScan with all security modules active.
i) eScan Real Time Monitoring
ii) eScan Proactive protection
iii) eScan Firewall IDS/IPS Intrusion prevention
• Users shouldn’t enable macros in documents.
• Organizations should deploy and maintain a backup solution.
• Most important, Organizations should implement MailScan at the Gateway Level for mail servers, to contain the spread of suspicious attachments.