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| Src | Date (GMT) | Titre | Description | Tags | Stories | Notes |
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2021-03-17 18:03:00 | Anomali Cyber Watch: APT, Ransomware, Vulnerabilities and More (lien direct) | The various threat intelligence stories in this iteration of the Anomali Cyber Watch discuss the following topics: APT, AlientBot, Clast82, China, DearCry, RedXOR, 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
Google: This Spectre proof-of-concept shows how dangerous these attacks can be
(published: March 15, 2021)
Google has released a proof of concept (PoC) code to demonstrate the practicality of Spectre side-channel attacks against a browser's JavaScript engine to leak information from its memory. Spectre targeted the process in modern CPUs called speculative execution to leak secrets such as passwords from one site to another. While the PoC demonstrates the JavaScript Spectre attack against Chrome 88's V8 JavaScript engine on an Intel Core i7-6500U CPU on Linux, Google notes it can easily be tweaked for other CPUs, browser versions and operating systems.
Analyst Comment: As the density of microchip manufacturing continues to increase, side-channel attacks are likely to be found across many architectures and are difficult (and in some cases impossible) to remediate in software. The PoC of the practicality of performing such an attack using javascript emphasises that developers of both software and hardware be aware of these types of attacks and the means by which they can be used to invalidate existing security controls.
Tags: CVE-2017-5753
Threat Assessment: DearCry Ransomware
(published: March 12, 2021)
A new ransomware strain is being used by actors to attack unpatched Microsoft Exchange servers. Microsoft released patches for four vulnerabilities that are being exploited in the wild. The initial round of attacks included installation of web shells onto affected servers that could be used to infect additional computers. While the initial attack appears to have been done by sophisticated actors, the ease and publicity around these vulnerabilities has led to a diverse group of actors all attempting to compromise these servers.
Analyst Comment: Patch and asset management are a critical and often under-resourced aspect of defense in depth. As this particular set of vulnerabilities and attacks are against locally hosted Exchange servers, organization may want to assess whether a hosted solution may make sense from a risk standpoint
MITRE ATT&CK: [MITRE ATT&CK] Data Encrypted - T1022 | [MITRE ATT&CK] Exploit Public-Facing Application - T1190 | [MITRE ATT&CK] File and Directory Discovery - T1083 | [MITRE ATT&CK] Email Collection - T1114 | [MITRE ATT&CK] Obfuscated Files or Information - T1027 | [MITRE ATT&CK] System Service Discovery - T1007 | [MITRE ATT&CK] Data Encrypted for Impact - T1486 | |
Ransomware Tool Vulnerability Threat Guideline | Wannacry APT 41 APT 34 |
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