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| Src | Date (GMT) | Titre | Description | Tags | Stories | Notes |
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2024-05-22 16:31:26 | Grandoreiro Banking Trojan Resurfaces dans Global Campaign Grandoreiro Banking Trojan Resurfaces in Global Campaign (lien direct) |
## Instantané Depuis mars 2024, IBM X-Force a suivi des campagnes de phishing à grande échelle distribuant le cheval de Troie bancaire Grandoreiro, considéré comme un logiciel malveillant en tant que service (MAAS). Lisez la rédaction de Microsoft \\ sur Grandoreiro [ici] (https://security.microsoft.com/intel-explorer/articles/f07d1d16). ## Description Grandoreiro a connu des mises à jour importantes, notamment le décryptage amélioré des chaînes et un nouvel algorithme générateur de domaine (DGA).Le malware exploite également les clients Microsoft Outlook sur les hôtes infectés pour diffuser des e-mails de phishing. Historiquement, les campagnes ont été principalement limitées à l'Amérique latine, à l'Espagne et au Portugal.Mais la dernière variante est conçue pour cibler spécifiquement plus de 1500 banques mondiales, permettant aux attaquants de commettre une fraude bancaire dans plus de 60 pays, élargissant la portée du malware à des régions comme l'Amérique centrale et du Sud, l'Afrique, l'Europe et l'Indo-Pacifique.Selon IBM, les logiciels malveillants évolués et le ciblage élargi peuvent être en réponse à des mesures d'application de la loi contre Grandoreiro. La chaîne d'infection de Grandoreiro \\ commence par un chargeur personnalisé, qui vérifie si la victime est une cible légitime et non un chercheur ou dans un bac à sable.Il rassemble des données de base de la victime, l'envoie au serveur de commandement et de contrôle (C2) et télécharge le Trojan.La variante récente du Malware \\ comprend un mécanisme de décryptage de chaîne retravaillé, en utilisant un processus complexe et en plusieurs étapes impliquant le cryptage Base64 et AES. Le Troie profil les victimes pour adapter les attaques, ciblant des applications bancaires spécifiques et des portefeuilles de crypto-monnaie.Son algorithme DGA avancé génère plusieurs domaines C2 quotidiennement, améliorant sa résilience.Grandoreiro peut exécuter un large éventail de commandes, de la télécommande et de la gestion des fichiers aux campagnes de spam de keylogging et d'Outlook.Cette capacité à envoyer des e-mails de phishing des clients Infected Outlook contribue à sa propagation. ## Microsoft Intelligence En plus de suivre l'activité de Grandoreiro en Europe, en Afrique et en Amérique latine, Microsoft Threat Intelligence a observé un ciblage de Grandoreiro aux États-Unis. ## Détections ** Microsoft Defender Antivirus ** Microsoft Defender Antivirus détecte les composants de menace comme le FOLlowing malware: - * [Trojanspy: Win32 / Grandoreiro] (https://www.microsoft.com/en-us/wdsi/Threats/Malware-encyClopedia-Description?name=trojanspy:win32/grandoreiro& ;TheRatid=-2147235291) * - * [Trojan: Win32 / Grandoreiro] (https://www.microsoft.com/en-us/wdsi/Threats/Malware-encyClopedia-Description?name=trojan:win32/Grandoreiro.MBJr!Mtb& ;heterid=-2147060695) * - * [Trojandownloader: VBS / Grandoreiro] (https://www.microsoft.com/en-us/wdssi/Therets/Malware-encyClopedia-Description?name=trojandownOader:win32/grandoreiro.zy!SMS& ;Thereatid=-2147059024) * - * [Trojan: Win64 / Grandoreiro] (https://www.microsoft.com/en-us/wdsi/Therets/Malware-encyClopedia-dercription?name=trojan:win64/grandoreiro.psye!mtb& ;theatid=-2147128454)* - * [Comportement: win32 / Grandoreiro] (https://www.microsoft.com/en-us/wdsi/therets/malware-encycopedia-dercription?name=behavior:win32/grandoreiro.f & menaceId = -2147139055) * - * [Spyware: win32 / Grandoreiro] (https://www.microsoft.com/en-us/wdsi/Threats/Malware-encycopedia-dercription?naME = Spyware: Win32 / Grandoreiro! Mclg & menaceID = 325649) * ** Microsoft Defender pour le point de terminaison ** Les alertes avec les titres suivants dans le centre de sécurité peuvent indiquer une activité de menace sur votre réseau: - * Activité possible de Grandoreiro * ## Recommandations Microsoft recommande les atténuations sui | Spam Malware Tool Threat Legislation | ★★ | |
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2024-03-06 01:05:06 | Faits saillants hebdomadaires d'osint, 4 mars 2024 Weekly OSINT Highlights, 4 March 2024 (lien direct) |
## Weekly OSINT Highlights, 4 March 2024 Ransomware loomed large in cyber security research news this week, with our curated OSINT featuring research on Abyss Locker, BlackCat, and Phobos. Phishing attacks, information stealers, and spyware are also in the mix, highlighting the notable diversity in the cyber threat landscape. The OSINT reporting this week showcases the evolving tactics of threat actors, with operators increasingly employing multifaceted strategies across different operating systems. Further, the targets of these attacks span a wide range, from civil society figures targeted by spyware in the Middle East and North Africa to state and local governments victimized by ransomware. The prevalence of attacks on sectors like healthcare underscores the significant impact on critical infrastructure and the potential for substantial financial gain through ransom payments. 1. [**Abyss Locker Ransomware Evolution and Tactics**](https://ti.defender.microsoft.com/articles/fc80abff): Abyss Locker ransomware, derived from HelloKitty, exfiltrates victim data before encryption and targets Windows systems, with a subsequent Linux variant observed. Its capabilities include deleting backups and employing different tactics for virtual machines, indicating a growing sophistication in ransomware attacks. 2. [**ALPHV Blackcat Ransomware-as-a-Service (RaaS)**:](https://ti.defender.microsoft.com/articles/b85e83eb) The FBI and CISA warn of ALPHV Blackcat RaaS, which targets multiple sectors, particularly healthcare. Recent updates to ALPHV Blackcat include improved defense evasion, encryption capabilities for Windows and Linux, reflecting the increasing sophistication in ransomware operations. 3. [**Phobos RaaS Model**](https://ti.defender.microsoft.com/articles/ad1bfcb4): Phobos ransomware, operating as a RaaS model, frequently targets state and local governments. Its use of accessible open-source tools enhances its popularity among threat actors, emphasizing the ease of deployment and customization for various environments. 4. [**TimbreStealer Phishing Campaign**](https://ti.defender.microsoft.com/articles/b61544ba): Talos identifies a phishing campaign distributing TimbreStealer, an information stealer disguised as Mexican tax-related themes. The threat actor was previously associated with banking trojans, underscoring the adaptability and persistence of malicious actors. 5. [**Nood RAT Malware Features and Stealth**](https://ti.defender.microsoft.com/articles/cc509147): ASEC uncovers Nood RAT, a Linux-based variant of Gh0st RAT, equipped with encryption and disguised as legitimate software. The malware\'s flexibility in binary creation and process naming underscores the threat actor\'s intent to evade detection and carry out malicious activities with sophistication. 6. [**Predator Spyware Infrastructure and Targeting**](https://ti.defender.microsoft.com/articles/7287eb1b): The Insikt Group\'s discovery highlights the widespread use of Predator spyware, primarily targeting journalists, politicians, and activists in various countries. Despite its purported use for counterterrorism and law enforcement, Predator is employed by threat actors outside these contexts, posing significant privacy and safety risks. ## 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) and the following blog posts: - [Ransomware as a service: Understanding the cybercrime gig economy and how to protect yourself](https://www.microsoft.com/en-us/security/blog/2022/05/09/ransomware-as-a-service-understanding-the-cybercrime-gig-economy-and-how-to-protect-yourself/?ocid=magicti_ta_blog#defending-against-ransomware) Microsoft customers can use the following reports in Microsoft Defender Threat Intelligence to get the most up-to-date information about the threat actor, malicious activity, and techniques discussed in this summary. The following | Ransomware Spam Malware Tool Threat Legislation Medical | ★★★★ |
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