Cybersecurity weekly: Acer hacked, Exchange targeted, Zoom bugs
The REvil ransomware gang hacked Acer and is demanding a $50 million ransom. Microsoft Exchange servers are now targeted by BlackKingdom ransomware. A Zoom screen sharing bug lets users access restricted apps. All this, and more, in this week’s edition of Cybersecurity Weekly.
1. REvil ransomware gang hacked Acer and is demanding a $50 million ransom
Taiwanese computer giant Acer was victim of the REvil ransomware attack, the gang is demanding the payment of a $50,000,000 ransom, the largest one to date. The ransomware gang claimed to have stolen data from the systems of the vendor before encrypting them, then published on their data leak site some images of allegedly stolen documents.
2. Microsoft Exchange servers now targeted by BlackKingdom ransomware
Another ransomware operation known as BlackKingdom is exploiting the Microsoft Exchange Server ProxyLogon vulnerabilities to encrypt servers. Researchers state that the threat actor used the vulnerability to execute a PowerShell script that downloads the ransomware executable and pushes it out to other computers on the network.
3. Zoom screen sharing bug lets users access restricted apps
A newly discovered glitch in Zoom's screen sharing feature can accidentally leak sensitive information to other attendees in a call. The unpatched security vulnerability makes it possible to reveal contents of applications that are not shared, but only briefly, thereby making it harder to exploit it in the wild.
4. CISA releases a tool to detect SolarWinds malicious activity
U.S. CISA released the CISA Hunt and Incident Response Program (CHIRP) tool. This is a Python-based tool that allows detecting malicious activity associated with the SolarWinds hackers in compromised on-premises enterprise Windows environments. Both alerts are related to SolarWinds attacks against government agencies and private sector organizations.
5. Hackers infecting Apple app developers with trojanized Xcode projects
Last week, cybersecurity researchers disclosed a new attack wherein threat actors leverage Xcode as an attack vector to compromise Apple platform developers with a backdoor. The trojanized Xcode project is a tainted version of a legitimate, open-source project available on GitHub called TabBarInteraction.
6. Remote lesson monitoring program could be exploited to attack student PCs
Early last week, McAfee disclosed the existence of multiple security holes in Netop Vision Pro, popular monitoring software adopted by schools for teachers to control remote learning sessions. After setting up a virtual 'classroom' made up of four devices on a local network, the researchers realized that all network traffic was unencrypted by default.
7. Microsoft Defender can now protect servers against ProxyLogon attacks
Microsoft announced that its Defender Antivirus and System Center Endpoint Protection now provides automatic protection against attacks exploiting the recently disclosed ProxyLogon vulnerabilities in Microsoft Exchange. This is the result of a recent emergency out-of-band security update.
8. DDoS booters now abuse DTLS servers to amplify attacks
DDoS-for-hire services are now actively abusing misconfigured or out-of-date Datagram Transport Layer Security servers to amplify distributed denial-of-service attacks. A recent DDOS attack used DTLS to amplify traffic from vulnerable Citrix ADC devices that used DTLS configurations without a mechanism designed to block such abuse.
9. Fintech giant Fiserv used unclaimed domain
If you sell web-based software for a living and ship code that references an unregistered domain name, you are asking for trouble. But when the same mistake is made by a Fortune 500 company, the results can range from costly to disastrous.
10. RCE flaw in Apache OFBiz could allow to take over the ERP system
Last week, the Apache Software Foundation addressed a high-severity vulnerability in Apache OFBiz, tracked as CVE-2021-26295, that could have allowed a remote, unauthenticated attacker to take over the ERP system. The issue is unsafe deserialization that affects versions prior to 17.12.06.
In this Series
- Cybersecurity weekly: Acer hacked, Exchange targeted, Zoom bugs
- Canada Flipper Zero ban and new RustDoor macOS malware
- AnyDesk hack and iPhone patched kernel flaw
- Tesla Pwn2Own hacks and iOS push alerts abuse
- TeamViewer breach and Atlassian Jira outage
- Moscow ISP revenge hack and Microsoft Sharepoint bug warning
- X verified accounts hack and SpectralBlur macOS malware
- CISA default password alert and SOHO KV-botnet campaign
- New 5G modem flaws and Apple’s data breach report
- Staples cyberattack, Agent Racoon backdoor and other news
- British Library ransomware attack, Windows fingerprint authentication bypass
- Samsung UK data breach and ransomware actor’s SEC complaint
- ICBC ransomware attack and ChatGPT outage
- Boeing Lockbit ransomware attack, Apple’s vulnerability and WhatsApp mods spyware
- Octo Tempest hacking group and new iLeakage attack
- Okta support system breach and Google Ads fake KeePass campaign
- Skype DarkGate malware, Shadow PC breach and AvosLocker ransomware warning
- 23andMe data theft, MGM’s $100M ransomware loss and the Azure VM breach
- Malicious Bing Chat ads and FBI’s dual ransomware warning
- T-Mobile app glitch and fake Booking.com pages
- Airbus data leak, Cisco Webex ad malware and €345 million TikTok fine
- New Apple iMessage exploit and CISA’s Apache RocketMQ warning
- Forever 21 data breach and Android BadBazaar espionage
- Duolingo data leak and the Met Police IT hack
- Discord.io data breach and Ivanti Avalanche vulnerabilities
- UK Electoral Commission hack and Microsoft’s role in China email breach
- Salesforce email zero-day exploit and Microsoft Power Platform criticism
- Airlines disclose pilot data breach and the Microsoft Teams bug
- GravityRAT Android Trojan and new MOVEit Transfer flaw
- University of Manchester hack and Honda API flaws
- MOVEit zero-day exploit and the U.S. iPhone hack accusation
- Daam Android virus and Barracuda zero-day flaw
- TP-Link router exploit and 18-year-old charged with hacking DraftKings accounts
- Discord support hack and Toyota location data leak
- Twitter private tweets bug and Cisco phone router vulnerabilities
- Cisco XSS zero-day flaw and PaperCut vulnerabilities
- 3CX hackers hit critical infrastructure and secondhand routers cause security concerns
- Hyundai data breach and Microsoft’s warning to accountants
- Western Digital cloud breach and the MSI ransomware hack
- TMX loan data breach, Italy bans ChatGPT and WordPress Elementor Pro exploit
- ChatGPT data leak and Gmail message theft by North Korean hackers
- U.S. federal agency hack and the return of FakeCalls Android malware
- Massive AT&T data breach and fake jobs targeting security researchers
- U.S. Marshals service breach and TPM 2.0 security flaws
- Dangerous ChatGPT apps and food giant Dole ransomware attack
- GoDaddy malware installations, record-breaking DDoS attack and the new WhiskerSpy malware
- Reddit’s employees phished, healthcare firms targeted and the new Screenshotter malware
- JD Sports data breached, VMware ESXi servers attacked and the HeadCrab malware
- Yandex source code leaked, 4500+ WordPress sites hacked and the new SwiftSlicer malware
- PayPal accounts breached, Fortinet VPN flaw exploited, and the new Hook malware
- Twitter users’ emails leaked, ChatGPT used to write malware and Slack’s repository breach
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