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2024-07-16 07:26:11 | Acteurs de menace \\ 'Arsenal: comment les pirates ciblent les comptes cloud Threat Actors\\' Arsenal: How Hackers Target Cloud Accounts (lien direct) |
Introduction In today\'s interconnected world, cloud computing has become the backbone of countless businesses. However, with this rise in cloud adoption, malicious actors have adapted their strategies to compromise sensitive data stored in cloud environments and propagate threats throughout supply chains. One prevalent method is the use of tools specifically designed to automate attacks against cloud accounts, resulting in account takeover (ATO) and business email compromise (BEC) incidents. Keeping up with a tradition of trying to understand the attackers\' perspective, Proofpoint cloud threat researchers have obtained and analyzed various hacking tools used by threat actors. In this blog series, we\'ll showcase a few examples and explore the largely uncovered world of these tools, while examining their functionalities, the risks they pose, and how organizations can defend against them. Understanding toolsets: basic concepts and terminology Attack toolsets are purposefully crafted to enable, automate, and streamline cyber-attacks en masse. These toolsets exploit diverse weaknesses, from frequent misconfigurations to old authentication mechanisms, in order to gain access to selected resources. Often, attack toolsets are designed with specific aims in mind. In recent years, cloud accounts have become prime targets. But getting your hands on effective tools is not so trivial. Some toolsets are only sold or circulated within restricted channels, such as closed Darknet hacking forums, while others (especially older versions) are publicly available online. With a rising demand for hacking capabilities, hacking-as-a-service (HaaS) has become a prominent business model in today\'s cyber threat landscape, providing convenient access to advanced hacking capabilities in exchange for financial gain. As such, it lowers entry barriers for cybercriminals, allowing them to execute attacks with minimal effort. Regardless of their complexity, every attack tool aiming to compromise cloud accounts must utilize an initial threat vector to gain unauthorized access. Proofpoint\'s ongoing monitoring of the cloud threat landscape has led its researchers to categorize the majority of observed attacks into two primary threat vectors: brute-force attacks and precision attacks. In terms of sheer volume, brute-force attacks, encompassing techniques such as password guessing and various other methods, continue to maintain their status as the most prevalent threat vector. Despite the statistical nature of these attacks and their reliance on a "spray and pray" approach, they remain a significant threat. According to our research, roughly 20% of all organizations targeted by brute-force attacks in 2023 experienced at least one successful account compromise instance. The surprising effectiveness of brute-force methods, combined with their relative simplicity, makes this vector appealing not only to common cybercriminals, but also to sophisticated actors. In January 2024, Microsoft disclosed that it had fallen victim to a nation-state attack attributed to the Russian state-sponsored group APT29 (also known as TA421 and Midnight Blizzard). According to Microsoft\'s announcement, the attackers employed password spraying to compromise a legacy, non-production test tenant account that lacked multifactor authentication (MFA). After gaining access, attackers were able to quickly leverage it and hijack additional assets, ultimately exfiltrating sensitive data from various resources. This incident emphasizes the potential risk that brute-force and password spraying attacks pose to inadequately protected cloud environments. A brute-force attack kill chain, targeting cloud environments using leaked credentials and proxy networks. Combo lists, proxy lists and basic authentication Combo lists play a crucial role in facilitating systematic and targeted credential stuffing attacks. These lists, comprised of curated email address and password pairs, serve as the basic ammunition for most tools. Attackers leverage combo lists to automate the pr | Spam Malware Tool Threat Prediction Cloud Technical | APT 29 | |
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2024-04-12 06:00:03 | Arrêt de cybersécurité du mois: vaincre les attaques de création d'applications malveillantes Cybersecurity Stop of the Month: Defeating Malicious Application Creation Attacks (lien direct) |
This blog post is part of a monthly series, Cybersecurity Stop of the Month, which explores the ever-evolving tactics of today\'s cybercriminals. It focuses on the critical first three steps in the attack chain in the context of email threats. The goal of this series is to help you understand how to fortify your defenses to protect people and defend data against emerging threats in today\'s dynamic threat landscape. The critical first three steps of the attack chain-reconnaissance, initial compromise and persistence. So far in this series, we have examined these types of attacks: Supplier compromise EvilProxy SocGholish eSignature phishing QR code phishing Telephone-oriented attack delivery (TOAD) Payroll diversion MFA manipulation Supply chain compromise Multilayered malicious QR code attack In this post, we examine an emerging threat-the use of malicious cloud applications created within compromised cloud tenants following account takeover. We refer to it as MACT, for short. Background Cloud account takeover (ATO) attacks are a well-known risk. Research by Proofpoint found that last year more than 96% of businesses were actively targeted by these attacks and about 60% had at least one incident. Financial damages reached an all-time high. These findings are unsettling. But there is more for businesses to worry about. Cybercriminals and state-sponsored entities are rapidly adopting advanced post-ATO techniques. And they have embraced the use of malicious and abused OAuth apps. In January 2024, Microsoft revealed that a nation-state attacker had compromised its cloud environments and stolen valuable data. This attack was attributed to TA421 (aka Midnight Blizzard and APT29), which are threat groups that have been attributed to Russia\'s Foreign Intelligence Service (SVR). Attackers exploited existing OAuth apps and created new ones within hijacked cloud tenants. After the incident, CISA issued a new advisory for businesses that rely on cloud infrastructures. Proofpoint threat researchers observed attackers pivoting to the use of OAuth apps from compromised-and often verified-cloud tenants. Threat actors take advantage of the trust that\'s associated with verified or recognized identities to spread cloud malware threats as well as establish persistent access to sensitive resources. The scenario Proofpoint monitors a malicious campaign named MACT Campaign 1445. It combines a known tactic used by cloud ATO attackers with new tactics, techniques and procedures. So far, it has affected dozens of businesses and users. In this campaign, attackers use hijacked user accounts to create malicious internal apps. In tandem, they also conduct reconnaissance, exfiltrate data and launch additional attacks. Attackers use a unique anomalous URL for the malicious OAuth apps\' reply URL-a local loopback with port 7823. This port is used for TCP traffic. It is also associated with a known Windows Remote Access Trojan (RAT). Recently, Proofpoint researchers found four accounts at a large company in the hospitality industry compromised by attackers. In a matter of days, attackers used these accounts to create four distinct malicious OAuth apps. The threat: How did the attack happen? Here is a closer look at how the attack unfolded. Initial access vectors. Attackers used a reverse proxy toolkit to target cloud user accounts. They sent individualized phishing lures to these users, which enabled them to steal their credentials as well as multifactor authentication (MFA) tokens. A shared PDF file with an embedded phishing URL that attackers used to steal users\' credentials. Unauthorized access (cloud account takeover). Once attackers had stolen users\' credentials, they established unauthorized access to the four targeted accounts. They logged in to several native Microsoft 365 sign-in apps, including “Azure Portal” and “Office Home.” Cloud malware (post-access OAuth app creat | Spam Malware Tool Threat Cloud | APT 29 | ★★★ |
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