Today I am so happy to announce a big improvement in the threats observatory (available for here). The main improvement sees the introduction of clustering stereotypes for each tracked malware family in three different behaviors: Domains, Files and Processes. Every malware does specific actions on domains, files and processes realms by meaning that every sample […]
Read more "Cyber Threats Observatory Gets Improvements"This is the fifth week my company (Yoroi) and I are working from home (covid-19). While every company process is running smooth and fast, personal quarantine is getting quite long and heavy especially if you are accustom to travel a lot for working purposes. Under these circumstances home office setup becomes very important as you […]
Read more "Working From Home: Building Your Own Setup"Introduction Information sharing is one of the most important activity that cybersecurity researchers do on daily basis. Thanks to “infosharing” activities it is possible to block or, in specific cases, to prevent cyber attacks. Most of the infosharing activities involved in cybersecurity are mostly focused on Indicator of Compromise such as: URL, IPs, Domains and […]
Read more "Cyber Threat Trends Dashboard"One year ago I decided to invest in static Malware Analysis automation by setting up a full-stack environment able to grab samples from common opensources and to process them by using Yara rules. I mainly decided to offer to cybersecurity community a public dataset of pre-processed analyses and let them be “searchable” offering PAPI and […]
Read more "After 1 Million of Analyzed Samples"Nowadays one of the most frequent cybersecurity threat comes from Malicious (office) document shipped over eMail or Instant Messaging. Some analyzed threats examples include: Step By Step Office Dropper Dissection, Spreading CVS Malware over Google, Microsoft Powerpoint as Malware Dropper, MalHIDE, Info Stealing: a New Operation in the Wild, Advanced All in Memory CryptoWorm, etc. […]
Read more "Frequent VBA Macros used in Office Malware"During the early 2000s in private chats or even in public IRC channels, self-styled “hackers” used to DOX people in order to prove their competence in “dark arts” (cit. Proceedings of the 39th SIGCSE). I always was fascinated by those guys that with few information such as an email address or a nickname were able […]
Read more "DOXing in 2019"From time to time we might observe special Malware storing themselves into a MBR and run during the booting process. Attackers could use this neat technique to infect and to mess-up your disk and eventually asking for a ransom before restoring original disk-configurations (Petya was just one of the most infamous boot-ransomware). But this is […]
Read more "Writing Your First Bootloader for Better Analyses"I started my Blog back in October 2007 (yep, 12 years ago !) with the simple intent of describing some of my experiences in Cyber Security. At that time it was not so common like today to write about vulnerabilities, “hacking tools” and “information security researches”, but since it was what I was studying during […]
Read more "TOP 100 Cyber Security Blog"There are many ways to fight cyber-crime, but what we used to do in Yoroi is Malware analysis and Incident response by using special and proprietary technologies. Often analyses are enough to temporary block cyber-criminals by sharing to everybody IOC allowing National and International players (ISP, AV vendors, CERTs and so on) to block connections […]
Read more "Free Tool: LooCipher Decryptor"Many state sponsored groups have been identified over time, many of them have different names (since discovered by different organizations) and there is no an agreed standardization on the topic but many victims and some interests look very tight together. From here the idea to compare the leaked source code of two different state sponsored […]
Read more "Similarities and differences between MuddyWater and APT34"