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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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2024-06-18 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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