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| Src | Date (GMT) | Titre | Description | Tags | Stories | Notes |
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2024-07-18 14:00:00 | Apt41 est né de la poussière APT41 Has Arisen From the DUST (lien direct) |
Written by: Mike Stokkel, Pierre Gerlings, Renato Fontana, Luis Rocha, Jared Wilson, Stephen Eckels, Jonathan Lepore
Executive Summary In collaboration with Google\'s Threat Analysis Group (TAG), Mandiant has observed a sustained campaign by the advanced persistent threat group APT41 targeting and successfully compromising multiple organizations operating within the global shipping and logistics, media and entertainment, technology, and automotive sectors. The majority of organizations were operating in Italy, Spain, Taiwan, Thailand, Turkey, and the United Kingdom. APT41 successfully infiltrated and maintained prolonged, unauthorized access to numerous victims\' networks since 2023, enabling them to extract sensitive data over an extended period. APT41 used a combination of ANTSWORD and BLUEBEAM web shells for the execution of DUSTPAN to execute BEACON backdoor for command-and-control communication. Later in the intrusion, APT41 leveraged DUSTTRAP, which would lead to hands-on keyboard activity. APT41 used publicly available tools SQLULDR2 for copying data from databases and PINEGROVE to exfiltrate data to Microsoft OneDrive. Overview Recently, Mandiant became aware of an APT41 intrusion where the malicious actor deployed a combination of ANTSWORD and BLUEBEAM web shells for persistence. These web shells were identified on a Tomcat Apache Manager server and active since at least 2023. APT41 utilized these web shells to execute certutil.exe to download the DUSTPAN dropper to stealthily load BEACON. As the APT41 intrusion progressed, the group escalated its tactics by deploying the DUSTTRAP dropper. Upon execution, DUSTTRAP would decrypt a malicious payload and execute it in memory, leaving minimal forensic traces. The decrypted payload was designed to establish communication channels with either APT41-controlled infrastructure for command and control or, in some instances, with a compromised Google Workspace account, further blending its malicious activities with legitimate traffic. The affected Google Workspace accounts have been successfully remediated to prevent further unauthorized access. Furthermore, APT41 leveraged SQLULDR2 to export data from Oracle Databases, and used PINEGROVE to systematically and efficiently exfiltrate large volumes of sensitive data from the compromised networks, transferring to OneDrive to enable exfiltration and subsequent analysis. |
Ransomware Malware Tool Threat Patching Medical Cloud | APT 41 | |
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2024-07-12 01:29:11 | L'équipage APT41 de China \\ ajoute un chargeur de logiciels malveillants furtifs et une porte dérobée fraîche à sa boîte à outils China\\'s APT41 crew adds a stealthy malware loader and fresh backdoor to its toolbox (lien direct) |
Rencontrez Dodgebox, fils de Stealthvector gang de cyber-espionnage soutenu par le gouvernement chinois, APT41 a très probablement ajouté un chargeur surnommé Dodgebox et une porte dérobée nommée Moonwalk à sa boîte à outils malveillante.'s ThreatLabz Research Team.…
Meet DodgeBox, son of StealthVector Chinese government-backed cyber espionage gang APT41 has very likely added a loader dubbed DodgeBox and a backdoor named MoonWalk to its malware toolbox, according to cloud security service provider Zscaler\'s ThreatLabz research team.… |
Malware Cloud | APT 41 | ★★★ |
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2024-06-18 14:00:00 | Couchée et secrète: Découvrir les opérations d'espionnage UNC3886 Cloaked and Covert: Uncovering UNC3886 Espionage Operations (lien direct) |
Written by: Punsaen Boonyakarn, Shawn Chew, Logeswaran Nadarajan, Mathew Potaczek, Jakub Jozwiak, Alex Marvi
Following the discovery of malware residing within ESXi hypervisors in September 2022, Mandiant began investigating numerous intrusions conducted by UNC3886, a suspected China-nexus cyber espionage actor that has targeted prominent strategic organizations on a global scale. In January 2023, Mandiant provided detailed analysis of the exploitation of a now-patched vulnerability in FortiOS employed by a threat actor suspected to be UNC3886. In March 2023, we provided details surrounding a custom malware ecosystem utilized on affected Fortinet devices. Furthermore, the investigation uncovered the compromise of VMware technologies, which facilitated access to guest virtual machines. Investigations into more recent operations in 2023 following fixes from the vendors involved in the investigation have corroborated Mandiant\'s initial observations that the actor operates in a sophisticated, cautious, and evasive nature. Mandiant has observed that UNC3886 employed several layers of organized persistence for redundancy to maintain access to compromised environments over time. Persistence mechanisms encompassed network devices, hypervisors, and virtual machines, ensuring alternative channels remain available even if the primary layer is detected and eliminated. This blog post discusses UNC3886\'s intrusion path and subsequent actions that were performed in the environments after compromising the guest virtual machines to achieve access to the critical systems, including: The use of publicly available rootkits for long-term persistence Deployment of malware that leveraged trusted third-party services for command and control (C2 or C&C) Subverting access and collecting credentials with Secure Shell (SSH) backdoors Extracting credentials from TACACS+ authentication using custom malware Mandiant has published detection and hardening guidelines for ESXi hypervisors and attack techniques employed by UNC3886. For Google SecOps Enterprise+ customer |
Malware Tool Vulnerability Threat Cloud Technical | APT 41 | ★★★ |
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2024-04-08 15:09:15 | Faits saillants hebdomadaires, 8 avril 2024 Weekly OSINT Highlights, 8 April 2024 (lien direct) |
Last week\'s OSINT reporting reveals several key trends emerge in the realm of cybersecurity threats. Firstly, there is a notable diversification and sophistication in attack techniques employed by threat actors, ranging from traditional malware distribution through phishing emails to advanced methods like DLL hijacking and API unhooking for evading detection. Secondly, the threat landscape is characterized by the presence of various actors, including state-sponsored groups like Earth Freybug (a subset of APT41) engaging in cyberespionage and financially motivated attacks, as well as cybercrime actors orchestrating malware campaigns such as Agent Tesla and Rhadamanthys. Thirdly, the targets of these attacks span across different sectors and regions, with organizations in America, Australia, and European countries facing significant threats. Additionally, the emergence of cross-platform malware like DinodasRAT highlights the adaptability of threat actors to target diverse systems, emphasizing the need for robust cybersecurity measures across all platforms. Overall, these trends underscore the dynamic and evolving nature of cyber threats, necessitating continuous vigilance and proactive defense strategies from organizations and cybersecurity professionals. **1. [Latrodectus Loader Malware Overview](https://sip.security.microsoft.com/intel-explorer/articles/b4fe59bf)** Latrodectus is a new downloader malware, distinct from IcedID, designed to download payloads and execute arbitrary commands. It shares characteristics with IcedID, indicating possible common developers. **2. [Earth Freybug Cyberespionage Campaign](https://sip.security.microsoft.com/intel-explorer/articles/327771c8)** Earth Freybug, a subset of APT41, engages in cyberespionage and financially motivated attacks since at least 2012. The attack involved sophisticated techniques like DLL hijacking and API unhooking to deploy UNAPIMON, evading detection and enabling malicious commands execution. **3. [Agent Tesla Malware Campaign](https://sip.security.microsoft.com/intel-explorer/articles/cbdfe243)** Agent Tesla malware targets American and Australian organizations through phishing campaigns aimed at stealing email credentials. Check Point Research identified two connected cybercrime actors behind the operation. **4. [DinodasRAT Linux Version Analysis](https://sip.security.microsoft.com/intel-explorer/articles/57ab8662)** DinodasRAT, associated with the Chinese threat actor LuoYu, is a cross-platform backdoor primarily targeting Linux servers. The latest version introduces advanced evasion capabilities and is installed to gain additional footholds in networks. **5. [Rhadamanthys Information Stealer Malware](https://sip.security.microsoft.com/intel-explorer/articles/bf8b5bc1)** Rhadamanthys utilizes Google Ads tracking to distribute itself, disguising as popular software installers. After installation, it injects into legitimate Windows files for data theft, exploiting users through deceptive ad redirects. **6. [Sophisticated Phishing Email Malware](https://sip.security.microsoft.com/intel-explorer/articles/abfabfa1)** A phishing email campaign employs ZIP file attachments leading to a series of malicious file downloads, culminating in the deployment of PowerShell scripts to gather system information and download further malware. **7. [AceCryptor Cryptors-as-a-Service (CaaS)](https://sip.security.microsoft.com/intel-explorer/articles/e3595388)** AceCryptor is a prevalent cryptor-as-a-service utilized in Rescoms campaigns, particularly in European countries. Threat actors behind these campaigns abuse compromised accounts to send spam emails, aiming to obtain credentials for further attacks. ## Learn More For the latest security research from the Microsoft Threat Intelligence community, check out the Microsoft Threat Intelligence Blog: [https://aka.ms/threatintelblog](https://aka.ms/threatintelblog). Microsoft customers can use the following reports in Microsoft Defender Threat Intelligence to ge | Ransomware Spam Malware Tool Threat Cloud | APT 41 | ★★★ |
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