Collaborate Disseminate
The world is 16+ hours into what looks like the biggest IT outage in history, triggered by a defective update for Crowdstrike endpoint security software for Windows machines. The price of both Crowdstrike’s and Microsoft’s shares has tumble… Continue reading Update: Worldwide IT outage due to buggy Crowdstrike update
A recently fixed SQL injection vulnerability (CVE-2023-48788) in Fortinet’s FortiClient Endpoint Management Server (EMS) solution has apparently piqued the interest of many: Horizon3’s Attack Team means to publish technical details and a pr… Continue reading Critical FortiClient EMS vulnerability fixed, (fake?) PoC for sale (CVE-2023-48788)
Attackers are trying to exploit a critical information disclosure vulnerability (CVE-2023-49103) in ownCloud, a popular file sharing and collaboration platform used in enterprise settings. Greynoise and SANS ISC say attemps have been first spotted over… Continue reading Critical ownCloud flaw under attack (CVE-2023-49103)
Cybercriminals are leveraging the ZeroFont technique to trick users into trusting phishing emails, SANS ISC handler Jan Kopriva has warned. The ZeroFont phishing attack Documented and named by Avanan in 2018, the ZeroFont technique involves using text … Continue reading New twist on ZeroFont phishing technique spotted in the wild
Today, I published the following diary on isc.sans.edu: “macOS: Who’s Behind This Network Connection?“: When you must investigate suspicious behavior or work on an actual incident, you could be asked to determine who’s behind a network connection. From a pure network point of view, your firewall or any network security
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Today, I published the following diary on isc.sans.edu: “Python Malware Using Postgresql for C2 Communications“: For modern malware, having access to its C2 (Command and control) is a crucial point. There are many ways to connect to a C2 server using tons of protocols, but today, HTTP remains very common
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Today, I published the following diary on isc.sans.edu: “More Exotic Excel Files Dropping AgentTesla”: Excel is an excellent target for attackers. The Microsoft Office suite is installed on millions of computers, and people trust these files. If we have the classic xls, xls, xlsm file extensions, Excel supports many others!
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Today, I published the following diary on isc.sans.edu: “Have You Ever Heard of the Fernet Encryption Algorithm?“: In cryptography, there is a gold rule that states to not develop your own algorithm because… it will be probably weak and broken! They are strong algorithms (like AES) that do a great job
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Today, I published the following diary on isc.sans.edu: “Quick Malware Triage With Inotify Tools“: When you handle a lot of malicious files, you must have a process and tools in place to speedup the analysis. It’s impossible to investigate all files and a key point is to find interesting files
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Today, I published the following diary on isc.sans.edu: “From a Zalando Phishing to a RAT“: Phishing remains a lucrative threat. We get daily emails from well-known brands (like DHL, PayPal, Netflix, Microsoft, Dropbox, Apple, etc). Recently, I received a bunch of phishing emails targeting Zalando customers. Zalando is a German
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