Tag Archive for: server

Investigation Begins In AIIMS Delhi Server Hack, Say Police Sources

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Investigation Begins In AIIMS Delhi Server Hack, Say Police Sources

AIIMS in a statement said they suspect a ransomware attack.

New Delhi:

After servers of Delhi’s All India Institute of Medical Sciences (AIIMS) faced malfunctioning due to an alleged hack, the Delhi Police have registered a First Information Report (FIR) and initiated an investigation, the police sources told NDTV today.

The IFSO unit of Delhi Police has registered a complaint against unknown persons on a complaint filed by the premier medical institute’s Assistant Security Officer, the police said.

Various government agencies are investigating the incident and supporting AIIMS in bringing back digital patient care services, the hospital said in an update.

Meanwhile, all emergency and routine patient care services and lab services are being managed manually, the statement added.

The server of AIIMS Delhi faced malfunctioning since 7 am yesterday, in the evening the hospital in a statement said the National Infomatics Centre was working to restore the system and “has informed that this may be a ransomware attack… (which) will be investigated by the appropriate authorities”.

Delhi’s largest referral hospital, which caters to 1.5 million outpatients and 80,000 inpatients every year, was operating manually yesterday, causing long queues at almost every department in the top medical institute.

According to the hospital’s statement issued yesterday, “measures are being taken to restore the digital services and support is being sought from Indian Computer Emergency Response Team (CERT-In) and National Infomatics Centre.”

“AIIMS and NIC will take precautions to prevent such future attacks,” the hospital said in a statement.

Ransomware is malicious software designed to deny a user or organisation access to files on their computer. In most cases, cyber attackers demand a ransom to allow access to the files.
 

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Mirai Botnet Targeted Wynncraft Minecraft Server, Cloudflare Reports

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Performance and security company Cloudflare reported that it stopped a 2.5Tbps distributed denial-of-service (DDoS) attack in Q3 2022 launched by a Mirai botnet against Minecraft server Wynncraft.

The data comes from the company’s latest DDoS Threat Report, which includes insights and trends about the DDoS threat landscape in the third quarter of 2022.

“Multi-terabit strong DDoS attacks have become increasingly frequent. In Q3, Cloudflare automatically detected and mitigated multiple attacks that exceeded 1Tbps,” the company wrote in a blog post on Wednesday.

“The largest attack was a 2.5Tbps DDoS attack launched by a Mirai botnet variant, aimed at the Minecraft server, Wynncraft. This is the largest attack we’ve ever seen from the bitrate perspective.”

According to Cloudflare, the multi-vector attack consisted of UDP and TCP floods. Still, the Wynncraft server infrastructure held and “didn’t even notice the attack” since the security firm filtered it out for them.

“Even with the largest attacks […], the peak of the attacks were short-lived. The entire 2.5Tbps attack lasted about 2 minutes […]. This emphasizes the need for automated, always-on solutions. Security teams can’t respond quickly enough.”

More generally, however, Cloudflare said it noticed a 405% increase in Mirai DDoS attacks compared with the second quarter of 2022, alongside a general increment by other threat actors.

“Attacks may be initiated by humans, but they are executed by bots — and to play to win, you must fight bots with bots,” Cloudflare wrote.

“Detection and mitigation must be automated as much as possible because relying solely on humans puts defenders at a disadvantage.”

Among the most impactful DDoS attacks of the last few months worth mentioning are the August ones against Taiwanese Government sites, the ones targeting UK financial institutions in September and the KillNet ones disrupting the websites of several US airports earlier this month.

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Microsoft’s third mitigation update for Exchange Server zero-day exploit bypassed within hours

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Microsoft has published its third update for its mitigation of an exploit abusing two zero-day vulnerabilities in Microsoft Exchange Server.

It marks the latest step towards providing a fix for the exploit, dubbed ‘ProxyNotShell’, in what has been a confusing week for system admins attempting to understand the threat.

Security researcher Kevin Beaumont highlighted on Friday that there is already a bypass for the Microsoft-provided mitigation. It means every one of the company’s attempts to prevent the exploit from harming customers has been circumvented within hours of publication.

The issue is in the way Microsoft’s signatures detect the exploit. Signatures monitor the w3wp.exe internet information services (IIS) module but for customers of Windows Server 2016 and above, w3wp.exe is excluded automatically by Exchange Server when IIS is installed.

“The only way to correct this is to turn off automatic exclusions,” he said, but Microsoft states explicitly in its documentation to not do this.

The original vulnerability disclosure for the ProxyNotShell exploit was atypical in nature and the information regarding potential fixes has been fragmented and confusing to follow for many. 

Discovered last week by security researchers at Vietnam-based company GTSC, the pair of zero-days has received a number of attempted fixes – the first of which was bypassed “easily”.

GTSC said in its report that it had noticed in-the-wild exploitation of both vulnerabilities for at least a month before publishing its findings.

The security issues are related to, but different from, the ProxyShell exploit which was developed in 2021 and are not protected by the patch Microsoft provided for ProxyShell that year. 

Tracked as CVE-2022-41040 and CVE-2022-41082, they each received a CVSSv3 severity score of 8.8/10. Microsoft Exchange versions 2013, 2016, and 2019 are affected.

Exploitation requires access to an authenticated user account but initial tests indicated that any email user’s account, regardless of the level of privileges they had, could be used to launch an attack. 

Microsoft Exchange Server customers are advised to monitor the official mitigation page and apply new ones as they become…

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Microsoft Exchange Server Has a Zero-Day Problem

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There were global ripples in tech policy this week as VPN providers were forced to pull out of India as the country’s new data collection law takes hold, and UN countries prepare to elect a new head of the International Telecommunications Union—a key internet standards body.

After explosions and damage to the Nord Stream gas pipeline that runs between Russia and Germany, the destruction is being investigated as deliberate, and a complicated hunt is on to identify the perpetrator. And still-unidentified hackers are “hyperjacking” victims to grab data using a long-feared technique for hijacking virtualization software.

The notorious Lapsus$ hackers have been back on their hacking joyride, compromising massive companies around the world and delivering a dire but important warning about how vulnerable large institutions really are to compromise. And the end-to-end-encrypted communication protocol Matrix patched serious and concerning vulnerabilities this week.

Pornhub debuted a trial of an automated tool that pushes users searching for child sexual abuse material to seek help for their behavior. And Cloudflare rolled out a free Captcha alternative in an attempt to validate humanness online without the headache of finding bicycles in a grid or deciphering blurry text.

We’ve got advice on how to stand up to Big Tech and advocate for data privacy and users’ rights in your community, plus tips on the latest iOS, Chrome, and HP updates you need to install.

And there’s more. Each week, we highlight the news we didn’t cover in-depth ourselves. Click on the headlines below to read the full stories. And stay safe out there.

On Thursday night, Microsoft confirmed that two unpatched Exchange Server vulnerabilities are actively being exploited by cybercriminals. The vulnerabilities were discovered by a Vietnamese cybersecurity company named GTSC, which claims in a post on its website that the two zero-days have been used in attacks against its customers since early August. While the flaws only impact on-premise Exchange Servers that an attacker has authenticated access to, according to GTSC, the zero-days can be chained together to create backdoors into the vulnerable server. “The…

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