Two bugs in Citrix technology are drawing serious attention this week from the Cybersecurity and Infrastructure Security Agency.
CISA says federal agencies much patch one of the vulnerabilities — tagged as CVE-2023-6548 — by January 24. It’s one of the rare times the cyber agency has put a remediation date of less than three weeks on a vulnerability.
CISA did not respond to requests for comment about why the remediation timeline was shorter than most.
The other bug — listed as CVE-2023-6548 — must be fixed by February 7. CISA’s alerts are aimed at federal agencies but often serve as general warnings for the public.
Microsoft Actions Following Attack by Nation State Actor Midnight Blizzard
Microsoft on Friday revealed that it was the target of a nation-state attack on its corporate systems that resulted in the theft of emails and attachments from senior executives and other individuals in the company's cybersecurity and legal departments.
The Windows maker attributed the attack to a Russian advanced persistent threat (APT) group it tracks as Midnight Blizzard (formerly Nobelium), which is also known as APT29, BlueBravo, Cloaked Ursa, Cozy Bear, and The Dukes.
On January 15, 2024, Volexity detailed widespread exploitation of Ivanti Connect Secure VPN vulnerabilities CVE-2024-21887 and CVE-2023-46805. In that blog post, Volexity detailed broader scanning and exploitation by threat actors using still non-public exploits to compromise numerous devices. Subsequently, Volexity has observed an increase in attacks from various threat actors against Ivanti Connect Secure VPN appliances beginning the same day.
Analyzing a pirated application, that contains a (malicious) surprise
A few days ago, malwrhunterteam tweeted about pirated macOS application that appeared to contain malware
And even though as noted in the tweet the sample appeared to be from 2023, it was new to me so I decided to take some time to dig in deeper. Plus, I’m always interested in seeing if Objective-See’s free open-source tools can provide protection against recent macOS threats.
In this blog post we’ll start with the disk image, then hone in on a malicious dynamic library, which turns out just to be the start!
By Tyler Sorensen and Heidy Khlaaf We are disclosing LeftoverLocals: a vulnerability that allows recovery of data from GPU local memory created by another process on Apple, Qualcomm, AMD, and Imagination GPUs. LeftoverLocals impacts the security posture of GPU applications as a whole, with particular significance to LLMs and ML models run on impacted GPU…
Some time ago, we intercepted a dubious ELF sample exhibiting zero detection on VirusTotal. This sample, named pandoraspear and employing a modified UPX shell, has an MD5 signature of 9a1a6d484297a4e5d6249253f216ed69. Our analysis revealed that it hardcoded nine C2 domain names, two of which had lapsed beyond their expiration protection period. We seized this opportunity to register these domains to gauge the botnet's scale. At its peak, we noted approximately 170,000 daily active bots, predominantly in Brazil.employing a modified UPX shell, has an MD5 signature of 9a1a6d484297a4e5d6249253f216ed69. Our analysis revealed that it hardcoded nine C2 domain names, two of which had lapsed beyond their expiration protection