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5 Most Devastating Cyber Attacks - Cybersecurity Insights #18

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This follows on from Microsoft research earlier this year which looked at cyber threats to public and private organisations. It also updates previous studies conducted by Microsoft in and , but with an additional focus on the security impact of COVID, work-related practises now and in future. That research showed that nearly a quarter of organisations employing over staff did not put any restrictions on employees access when working from home. However, this naturally creates new risks, including an increased risk of cyber-attacks. However, one in five employees feels their data is more vulnerable when working from home due to the absence of regular IT supports. One of the most concerning findings is that organisations are potentially side-stepping their own security procedures in the name of expediency:. The report identified an escalation in both the level and sophistication of attacks. The Impact Of Cyber Attacks On Technology

The WannaCry ransomware attack was a May worldwide cyberattack by the WannaCry ransomware cryptowormwhich targeted computers running the Microsoft Windows operating system by encrypting data and demanding ransom click in the Bitcoin cryptocurrency. EternalBlue was stolen and leaked by a group called The Shadow Brokers at least a year prior to tAtacks attack.

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While Microsoft had released patches previously to close the exploit, much of WannaCry's spread was from organizations that had not applied these, or were using older Windows systems that were past their end-of-life. The attack was halted within a few days of its discovery due to emergency patches released by Microsoft and the discovery of a kill switch that prevented infected computers from spreading WannaCry further. The attack was estimated to have affected more thancomputers across countries, with total damages ranging from hundreds of millions to billions of dollars.

Security experts believed from preliminary evaluation of the worm that the attack originated from North Korea or agencies working for the country. The virus spread to 10, machines in TSMC's most advanced facilities.

WannaCry is a ransomware cryptowormwhich targeted computers running the Microsoft Windows operating system by encrypting data and demanding ransom payments in the Bitcoin Cyer. The worm is also known as WannaCrypt, [8] Wana Decrypt0r 2. This transport code scans for vulnerable systems, then uses the EternalBlue exploit to gain access, and the DoublePulsar tool to install and execute a copy of itself. Much of the attention and comment around the event was occasioned by the fact that the U. National Security Agency NSA The Impact Of Cyber Attacks On Technology whom the exploit was likely stolen had already discovered the vulnerability, but used it to create an exploit for its own offensive workrather than report it to Microsoft.

Starting from 21 Aprilsecurity researchers reported that there were tens of thousands of computers with the DoublePulsar backdoor installed. When executed, the WannaCry malware first checks the " kill The Impact Of Cyber Attacks On Technology " domain name; if it is not found, then the ransomware encrypts the computer's data, [22] [23] [24] then attempts to exploit the SMB vulnerability to spread out to random computers on the Internet, [25] and "laterally" to computers on the same network. As with all such wallets, their transactions and balances are Impacg accessible even though the cryptocurrency wallet owners remain unknown.

Several organizations released detailed technical writeups of the malware, including a Attaks security analyst at RiskSense, [29] [30] Microsoft, [31] Cisco[12] Malwarebytes[25] Symantec and McAfee. The attack began on Friday, 12 May[32] [33] with evidence pointing to an initial infection in Asia at UTC.

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Organizations that had not installed Microsoft's security update from April were affected by the attack. Experts quickly advised affected users against paying the ransom due to no reports of people getting their data back after payment and as high revenues would encourage more of such campaigns.

The day after the initial attack in May, Microsoft released out-of-band security updates for end of life products Windows XPWindows Server and Windows 8 ; these patches had been created in February of that year following a tip off about the vulnerability in January of that year.

Researcher Marcus Hutchins [53] [54] discovered the kill switch domain hardcoded in the malware. While this did not help already infected systems, it severely slowed the spread of the initial infection and gave time for defensive measures to be deployed worldwide, particularly in North America and Asia, which had not been attacked to the same extent as elsewhere. This was followed by a second variant with the third and last kill-switch on 15 May, which was registered by Check Point threat The Impact Of Cyber Attacks On Technology analysts.

On 19 May, it was reported that hackers were trying to use a Mirai botnet variant to effect a distributed attack on WannaCry's kill-switch domain with the intention of knocking it offline.

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Separately, researchers from University College London and Boston University reported that their PayBreak system could defeat WannaCry and several other families of ransomware by recovering the keys used to encrypt the user's data. It was discovered that Windows encryption APIs used by WannaCry may not completely clear the prime numbers used to generate the payload's private keys from the memory, making it potentially possible to retrieve the required key if they had not yet been overwritten or cleared from resident memory. The key is kept in the memory if the WannaCry process has not been killed and the computer has not been rebooted after being infected. Within four days of the initial outbreak, new infections had slowed to a trickle due to these responses.]