WannaCry: Everything You Need to Know About the Global Ransomware Attack 

 

If you’ve done your best to stay away offline for the past two days so you could actually enjoy your weekend, you undoubtedly now find yourself trying to catch up on all the news surrounding WannaCry ransomware. This unprecedented malware attack began sweeping the globe late last week, and security researchers estimated that nearly 57,000 computers in more than 150 ｃountries were infected by the end of the day on Friday. While the spread of this terrifying ransomware was slowed on Saturday, it was hardly stopped. As of Monday morning, more than 200,000 systems around the world are believed to have been infected.

WannaCry is far and away the most severe malware attack so far in 2017, and the spread of this troubling ransomware is far from over. In this post, we’ll tell you what WannaCry is, what developments we’ve seen over the past three days, and how to protect yourself.

What is WannaCry?

First and foremost, let’s clarify exactly what WannaCry is. This malware is a scary type of trojan virus called “ransomware.” As the name suggests, the virus in effect holds the infected computer hostage and demands that the victim pay a ransom in order to regain access to the files on his or her computer.

What exactly does WannaCry do?

RansomWare like WannaCry works by encrypting most or even all of the files on a user’s computer. Then, the software demands that a ransom be paid in order to have the files decrypted. In the case of WannaCry specifically, the software demands that the victim pays a ransom of $300 in bitcoins at the time of infection. If the user doesn’t pay the ransom without three days, the amount doubles to $600. After seven days without payment, WannaCry will ｄelete all of the encrypted files and all data will be lost.

Per Symantec, here is a full list of the filetypes that are targeted and encrypted by WannaCry:
.123 .3dm .3ds .3g2 .3gp .602 .7z .ARC .PAQ .accdb .aes .ai .asc .asf .asm .asp .avi .backup .bak .bat .bmp .brd .bz2 .cgm .class .cmd .cpp .crt .cs .csr .csv .db .dbf .dch .der .dif .dip .djvu .doc .docb .docm .docx .dot .dotm .dotx .dwg .edb .eml .fla .flv .frm .gif .gpg .gz .hwp .ibd .iso .jar .java .jpeg .jpg .js .jsp .key .lay .lay6 .ldf .m3u .m4u .max .mdb .mdf .mid .mkv .mml .mov .mp3’ .mp4 .mpeg .mpg .msg .myd .myi .nef .odb .odg .odp .ods .odt onetoc2 .ost .otg .otp .ots .ott .p12 .pas .pdf .pem .pfx .php .pl .png .pot .potm .potx .ppam .pps .ppsm .ppsx .ppt .pptm .pptx .ps1 .psd .pst .rar .raw .rb .rtf .sch .sh .sldm .sldx .slk .sln .snt .sql .sqlite3 .sqlitedb .stc .std .sti .stw .suo .svg .swf .sxc .sxd .sxi .sxm .sxw .tar .tbk .tgz .tif .tiff .txt .uop .uot .vb .vbs .vcd .vdi .vmdk .vmx .vob .vsd .vsdx .wav .wb2 .wk1 .wks .wma .wmv .xlc .xlm .xls .xlsb .xlsm .xlsx .xlt .xltm .xltx .xlw .zip.
As you can see, the ransomware covers nearly any important file type a user might have on his or her computer. It also installs a text file on the user’s desktop with a ransom note (see picture above).

How was WannaCry created?

You can thank the NSA for discovering the “EternalBlue” exploit that would later be used by the WannaCry trojan, and then for keeping under wraps to use for its own intelligence gathering purposes. The security hole was then made public last month when a group of hackers called Shadow Brokers released the details of the exploit to the public.

Is the attack over?

No.

WannaCry was first discovered on Friday, May 12th, and it had spread to an estimated 57,000 computers in more than 150 different ｃountries around the world by the end of the day. European ｃountries were hit the hardest, and business ground to a halt at several large companies and organizations, including banks, hospitals, and government agencies.

On Saturday, a 22-year-old security researcher named Marcus Hutchins inadvertently slowed the spread of the WannaCry virus when he registered a domain name hidden within the virus’ code in an attempt to track the spread of WannaCry, unintentionally stopping its progress in the process. You can read Hutchins’ story in his blog post titled “How to Accidentally Stop a Global Cyber Attacks.”

Unfortunately, the spread of WannaCry wasn’t actually stopped, but instead slowed.

How can I protect myself from WannaCry?

Regardless of which operating system you run, you should install any and all available security ｕpdates immediately. Specifically, Windows users with machines that run Windows XP, Windows 8, or Windows Server 2003 should immediately install this security ｕpdate released on Friday by Microsoft.

What can I do if my computer is infected with WannaCry?

Sadly, there is no confirmed fix for WannaCry available at this time. Antivirus companies and cybersecurity experts are hard at work looking for ways to decrypt files on infected computers, but no means of third-party decryption are available right now. Hopefully affected users have backups of their data available, because the only other option right now that is known to work is to follow the instructions offered in the software to pay the ransom. Bleeping Computer has a WannaCry decryption guide on its site, but we cannot confirm whether or not it’s effective.

Article Source: http://bgr.com/2017/05/15/wanna-cry-ransomware-virus-windows-wannacry-explainer/
Image Source: http://cdn.bgr.com/2017/05/2cry.png

VOCABULARY WORDS:
1. malware (n) - software that is intended to damage or disable computers and computer systems.
2. first and foremost (phrase) - most importantly more than anything else.
3. trojan virus (n) - is any malicious computer program which is used to hack into a computer by misleading users of its true intent. The term is derived from the Ancient Greek story of the wooden horse that was used to help Greek troops invade the city of Troy by stealth.
4. encrypt (v) - convert (information or data) into a cipher or code, especially to prevent unauthorized access
conceal data in (something) by converting it into a code
5. decrypt (v) - make (a coded or unclear message) intelligible
6. EternalBlue exploit (n) - a piece of software generally believed to have been developed by the U.S. National Security Agency (NSA). It was leaked by the Shadow Brokers hacker group on 14 April 2017, and was used as part of the worldwide WannaCry ransomware attack on 12 May 2017
7. keep under wraps (idiom) - keep secret , alludes to covering something completely by wrapping it up
8. ground to a halt (idiom - v- simple past) -  gradually come to a standstill or end
9. inadvertently (adv) - without intention accidentally
10. third-party (adj) - relating to a person or group besides the two primarily involved in a situation

QUESTIONS FOR DISCUSSION:
1. How does a ransomware work?
2. Do you know how Korea has been affected by this recent global malware attack? What kinds of effects did your ｃountry experience?
3. What is the latest news you’ve heard about it?
4. How do you protect yourself from malware?
5. What does the article say about how you should protect yourself against this kind of ransomware?