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| Src | Date (GMT) | Titre | Description | Tags | Stories | Notes |
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2024-07-11 22:03:33 | Dodgebox: une plongée profonde dans l'arsenal mis à jour d'APT41 |Partie 1 DodgeBox: A deep dive into the updated arsenal of APT41 | Part 1 (lien direct) |
## Instantané
En avril 2024, Zscaler ThreatLabz a découvert un nouveau chargeur nommé Dodgebox, une version améliorée et évoluée de Stealthvector, un outil précédemment utilisé par le groupe chinois APT, APT41, suivi par Microsofoft.com / Intel-Profiles / ByExternalid / E49C4119AFE798DB103058C3FFDA5BD85E83534940247449478524d61ae6817a).
## Description
Après leur analyse de Dodgebox, les chercheurs de Zscaler KenenceLabz évaluent que le malware est une version améliorée du chargeur Stealthvector car il existe des similitudes importantes entre les deux Malwares.Écrit en C, Dodgebox est un chargeur de DLL réfléchissant qui a un certain nombre d'attributs, y compris la possibilité de décrypter et de charger des DLL intégrées, d'effectuer des vérifications de l'environnement et d'effectuer des procédures de nettoyage.Notamment, Dodgebox utilise également l'usurpation de pile d'appels, une technique utilisée par les logiciels malveillants pour obscurcir les origines des appels API, ce qui rend difficile la détection et les programmes de réponse aux points finaux (EDR) et les programmes antivirus pour détecter les logiciels malveillants.Dodgebox a été utilisé par APT41 pour livrer la porte dérobée Moonwalk, une nouvelle porte dérobée utilisée par le groupe de menaces.
Dodgebox et Stealthvector ont tous deux des similitudes dans leur:
- Ducchissement de la somme de contrôle et de la configuration,
- Format de configuration déchiffré,
- Keying environnemental
- Stratégie de correction de la Flux Guard (CFG), et
- Utilisation de DLL CALOWING
Zscaler note que leur confiance dans l'attribution des activités Dodgebox à APT41 est modérée car la charge de touche DLL est une technique souvent utilisée par les groupes chinois APT.De plus, les échantillons de Dodgebox téléchargés sur Virustotal proviennent de la Thaïlande et de Taïwan, alimentant avec le ciblage historique de l'Asie du Sud-Est par APT41 en utilisant Stealthvector.
## Détections / requêtes de chasse
### Microsoft Defender Antivirus
Microsoft Defender Antivirus détecte les composants de la menace comme le malware suivant:
- * [Trojan: win64 / dllhijack] (https: //www.microsoft.com/en-us/wdsi/therets/malware-encyclopedia-description?name=trojan:win64/dllhijack.ah!mtb)*
- * [Trojan: Win64 / CoBaltstrike] (https://www.microsoft.com/en-us/wdsi/therets/malware-encyclopedia-description?name=trojan:win64/cobaltsstrike.off!mtb) *
## Les références
[Dodgebox: une plongée profonde dans l'aresenal mis à jour d'APT41 |Partie 1] (https://www.zscaler.com/blogs/security-research/dodgebox-deep-dive-updated-arsenal-apt41-parte-1).Zscaler (consulté en 2024-07-11)
## Snapshot In April 2024, Zscaler ThreatLabz discovered a new loader named DodgeBox, an upgraded and evolved version of StealthVector, a tool previously used by the Chinese APT group, APT41, tracked by Microsoft as [Brass Typhoon](https://security.microsoft.com/intel-profiles/byExternalId/e49c4119afe798db103058c3ffda5bd85e83534940247449478524d61ae6817a). ## Description After their analysis of DodgeBox, researchers from Zscaler ThreatLabz assess that the malware is an enhanced version of StealthVector loader as there are significant similarities between the two malwares. Written in C, DodgeBox is a reflective DLL loader that has a number of attributes, including the ability to decrypt and load embedded DLLs, perform environment checks, and carry out cleanup procedures. Notably, DodgeBox also employs call stack spoofing, a technique used by malware to obfuscate the origins of API calls, making it difficult for Endpoint Detection and Response (EDR) solutions and antivirus programs to detect the malware. DodgeBox has been used by APT41 to deliver the MoonWalk backdoor, a new backdoor being employed by the threat group. DodgeBox and StealthVector both have similarities in their: - checksum and configuration decryption, - decrypted conf |
Malware Tool Threat Patching | APT 41 | ★★★ |
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2022-01-19 22:45:00 | Anomali Cyber Watch: Russia-Sponsored Cyber Threats, China-Based Earth Lusca Active in Cyberespionage and Cybertheft, BlueNoroff Hunts Cryptocurrency-Related Businesses, and More (lien direct) | The various threat intelligence stories in this iteration of the Anomali Cyber Watch discuss the following topics: APT, China, HTTP Stack, Malspam, North Korea, Phishing, Russia and Vulnerabilities. The IOCs related to these stories are attached to Anomali Cyber Watch and can be used to check your logs for potential malicious activity.
Figure 1 - IOC Summary Charts. These charts summarize the IOCs attached to this magazine and provide a glimpse of the threats discussed.
Trending Cyber News and Threat Intelligence
Earth Lusca Employs Sophisticated Infrastructure, Varied Tools and Techniques
(published: January 17, 2022)
The Earth Lusca threat group is part of the Winnti cluster. It is one of different Chinese groups that share aspects of their tactics, techniques, and procedures (TTPs) including the use of Winnti malware. Earth Lusca were active throughout 2021 committing both cyberespionage operations against government-connected organizations and financially-motivated intrusions targeting gambling and cryptocurrency-related sectors. For intrusion, the group tries different ways in including: spearphishing, watering hole attacks, and exploiting publicly facing servers. Cobalt Strike is one of the group’s preferred post-exploitation tools. It is followed by the use of the BioPass RAT, the Doraemon backdoor, the FunnySwitch backdoor, ShadowPad, and Winnti. The group employs two separate infrastructure clusters, first one is rented Vultr VPS servers used for command-and-control (C2), second one is compromised web servers used to scan for vulnerabilities, tunnel traffic, and Cobalt Strike C2.
Analyst Comment: Earth Lusca often relies on tried-and-true techniques that can be stopped by security best practices, such as avoiding clicking on suspicious email/website links and or reacting on random banners urging to update important public-facing applications. Don’t be tricked to download Adobe Flash update, it was discontinued at the end of December 2020. Administrators should keep their important public-facing applications (such as Microsoft Exchange and Oracle GlassFish Server) updated.
MITRE ATT&CK: [MITRE ATT&CK] Drive-by Compromise - T1189 | [MITRE ATT&CK] Exploit Public-Facing Application - T1190 | [MITRE ATT&CK] Phishing - T1566 | [MITRE ATT&CK] Command and Scripting Interpreter - T1059 | [MITRE ATT&CK] Scheduled Task - T1053 | [MITRE ATT&CK] System Services - T1569 | [MITRE ATT&CK] Windows Management Instrumentation - T1047 | [MITRE ATT&CK] Account Manipulation - T1098 | [MITRE ATT&CK] BITS Jobs - T1197 | [MITRE ATT&CK] Create Account - T1136 | [MITRE ATT&CK] Create or Modify System Process - T1543 | [MITRE ATT&CK] External Remote Services - T1133 | [MITRE ATT&CK] Hijack Execution Flow |
Ransomware Malware Tool Vulnerability Threat Patching Guideline | APT 41 APT 38 APT 29 APT 28 APT 28 | |
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2020-09-22 15:00:00 | Weekly Threat Briefing: Android Malware, APT Groups, Election Apps, Ransomware and More (lien direct) |
The various threat intelligence stories in this iteration of the Weekly Threat Briefing discuss the following topics: APT, Cerberus Source Code Leak, Chinese APT, Mrbminer Malware, and Vulnerabilities. The IOCs related to these stories are attached to the Weekly Threat Briefing and can be used to check your logs for potential malicious activity. 
Figure 1 - IOC Summary Charts. These charts summarize the IOCs attached to this magazine and provide a glimpse of the threats discussed.
Trending Cyber News and Threat Intelligence
US 2020 Presidential Apps Riddled with Tracking and Security Flaws
(published: September 17, 2020)
The Vote Joe 2020 application has been found to be potentially leaking personal data about voters. The app is used by the Joe Biden campaign to engage with voters and get supporters to send out promotional text messages. Using TargetSmart, an intelligence service, the app receives their predictions via API endpoint which has been found to be returning additional data. Voter preference and voter prediction could be seen, while voter preference is publically accessible, the information for TargetSmart was not meant to be publicly available. The app also let users from outside of the United States download, allowing for non-US citizens to have access to the data, as there was no email verification. Vote Joe isn’t the only campaign app with security issues, as the Donald Trump application exposed hardcoded secret keys in the APK.
Recommendation: The exposure of Personally Identifiable Information (PII) requires affected individuals to take precautionary measures to protect their identity and their finances. Identity theft services can assist in preventing illicit purchases, or applying for financial services from taking place by actors using stolen data.
Tags: APK, Android, Campaign, Election, Joe Biden, PII
German Hospital Attacked, Patient Taken to Another City Dies
(published: September 17, 2020)
A failure in IT systems at Duesseldorf University Hospital in Germany has led to the death of a woman. In an apparent ransomware attack, the hospital’s systems crashed with staff unable to access data. While there was no apparent ransom note, 30 servers at the hospital had been encrypted last week, with a ransom note left on one server addressed to Heinrich Heine University. Duesseldorf police contacted the perpetrators to inform them they had attacked the hospital instead of the university, with the perpetrators providing decryption keys, however patients had to be rerouted to other hospitals and therefore a long time before being treated by doctors.
Recommendation: Educate your employees on the risks of opening attachments from unknown senders. Anti-spam and antivirus applications provided by trusted vendors should also be employed. Emails that are received from unknown senders should be carefully avoided, and attachments from such senders should not be opened. Furthermore, it is important to have a comprehensive and tested backup solution in place, in addition to a business continuity plan for the unfortunate case of ransomware infection.
MITRE ATT&CK: [MITRE ATT&CK] Data Encrypted for Impact - T1486
Tags: Germany, Healthcare, Hospital, Ransomware
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Ransomware Malware Vulnerability Threat Patching Guideline | APT 41 | ★★★★★ |
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