Researchers Disclose Undocumented Chinese Malware Used in Recent Attacks

Cybersecurity researchers have disclosed a series of attacks by a threat actor of Chinese origin that has targeted organizations in Russia and Hong Kong with malware — including a previously undocumented backdoor. Attributing the campaign to Winnti or APT41, Positive Technologies dated the first...

Researchers Disclose Undocumented Chinese Malware Used in Recent Attacks

Cybersecurity researchers have disclosed a series of attacks by a threat actor of Chinese origin that has targeted organizations in Russia and Hong Kong with malware — including a previously undocumented backdoor. Attributing the campaign to Winnti or APT41, Positive Technologies dated the first...

Increasing resilience against Solorigate and other sophisticated attacks with Microsoft Defender

­Even as investigations into the sophisticated attack known as Solorigate are still underway, details and insights about the tools, patterns, and methods used by the attackers point to steps that organizations can take to improve their defenses against similar attacks. Solorigate is a cross-domai...

Unveiled: SUNSPOT Malware Was Used to Inject SolarWinds Backdoor

As the investigation into the SolarWinds supply-chain attack continues, cybersecurity researchers have disclosed a third malware strain that was deployed into the build environment to inject the backdoor into the company's Orion network monitoring platform. Called "Sunspot," the malignant tool ad...

Unveiled: SUNSPOT Malware Was Used to Inject SolarWinds Backdoor

As the investigation into the SolarWinds supply-chain attack continues, cybersecurity researchers have disclosed a third malware strain that was deployed into the build environment to inject the backdoor into the company's Orion network monitoring platform. Called "Sunspot," the malignant tool ad...

Backdoor.Win32.Zombam.a Remote Stack Buffer Overflow

Discovery / credits: malvuln - Malvuln.com c 2021 Original source: https://malvuln.com/advisory/6c5081e9b65a52963b0b1ae612ef7eb4.txt Contact: [email protected] Media: twitter.com/malvuln Threat: Backdoor.Win32.Zombam.a Vulnerability: Remote Stack Buffer Overflow Description: The malware listens...

Researchers Find Links Between Sunburst and Russian Kazuar Malware

Cybersecurity researchers, for the first time, may have found a potential connection between the backdoor used in the SolarWinds hack to a previously known malware strain. In new research published by Kaspersky researchers today, the cybersecurity firm said it discovered several features that...

Researchers Find Links Between Sunburst and Russian Kazuar Malware

Cybersecurity researchers, for the first time, may have found a potential connection between the backdoor used in the SolarWinds hack to a previously known malware strain. In new research published by Kaspersky researchers today, the cybersecurity firm said it discovered several features that...

Sunburst backdoor – code overlaps with Kazuar

Introduction On December 13, 2020, FireEye published a blog post detailing a supply chain attack leveraging Orion IT, an infrastructure monitoring and management platform by SolarWinds. In parallel, Volexity published an article with their analysis of related attacks, attributed to an actor named...

Backdoor.Win32.Levelone.b Remote Stack Buffer Overflow

Discovery / credits: malvuln - Malvuln.com c 2021 Original source: https://malvuln.com/advisory/3f82e6ddc9f5242f5af200d2fbae4ce4.txt Contact: [email protected] Media: twitter.com/malvuln Threat: Backdoor.Win32.Levelone.b Vulnerability: Remote Stack Buffer Overflow Description: The backdoor...

Backdoor in Zyxel Firewalls and Gateways

This is bad: More than 100,000 Zyxel firewalls, VPN gateways, and access point controllers contain a hardcoded admin-level backdoor account that can grant attackers root access to devices via either the SSH interface or the web administration panel. … Installing patches removes the backdoor...

A week in security (December 28 – January 3)

First off we would like to wish all our readers a happy and secure 2021! Last week on Malwarebytes Labs we presented an overview of developments in the SearchDimension hijackers, we looked at the most enticing cyberattacks of 2020, and we also looked back at the strangest cybersecurity events of...

Win32 Backdoor 2019-02-ARTRADOWNLOADER SEH Buffer Overflow

Discovery / credits: malvuln - Malvuln.com c 2021 Original source: http://malvuln.com/advisory/8d42c01180be7588a2a68ad96dd0cf85.txt Contact: [email protected] Media: twitter.com/malvuln Threat: WIN32 BACKDOOR - 2019-02-ARTRADOWNLOADER Vulnerabilities: Remote SEH Buffer Overflow and Insecure...

Backdoor account found in 100,000+ Zyxel Firewalls, VPN Gateways

By Deeba Ahmed Researchers have discovered a hard-coded admin-level backdoor account as a Zyxel firmware binary revealing username and password. This is a post from HackRead.com Read the original post: Backdoor account found in 100,000+ Zyxel Firewalls, VPN Gateways...

Secret Backdoor Account Found in Several Zyxel Firewall, VPN Products

Zyxel has released a patch to address a critical vulnerability in its firmware concerning a hardcoded, undocumented secret account that could be abused by an attacker to login with administrative privileges and compromise its networking devices. The flaw, tracked as CVE-2020-29583 CVSS score 7.8,...

Actively exploited vulnerability fixed in SolarWinds Orion

SolarWinds has fixed a vulnerability in the Orion Platform. A malicious party could exploit this vulnerability to bypass authentication within the Orion API. Subsequently, the API can be used to compromise the Orion installation or underlying operating system. The vulnerability is actively...

Microsoft Warns CrowdStrike of Hackers Targeting Azure Cloud Customers

New evidence amidst the ongoing probe into the espionage campaign targeting SolarWinds has uncovered an unsuccessful attempt to compromise cybersecurity firm Crowdstrike and access the company's email. The hacking endeavor was reported to the company by Microsoft's Threat Intelligence Center on...

SUNBURST Additional Technical Details

FireEye has discovered additional details about the SUNBURST backdoor since our initial publication on Dec. 13, 2020. Before diving into the technical depth of this malware, we recommend readers familiarize themselves with our blog post about the SolarWinds supply chain compromise, which revealed...

How we protect our users against the Sunburst backdoor

What happened SolarWinds, a well-known IT managed services provider, has recently become a victim of a cyberattack. Their product Orion Platform, a solution for monitoring and managing their customers IT infrastructure, was compromised by threat actors. This resulted in the deployment of a custom...

A Second Hacker Group May Have Also Breached SolarWinds, Microsoft Says

As the probe into the SolarWinds supply chain attack continues, new digital forensic evidence has brought to light that a separate threat actor may have been abusing the IT infrastructure provider's Orion software to drop a similar persistent backdoor on target systems. "The investigation of the...