NASK has taken over multiple domains used for cybercrime activities, making their further usage for illegal purposes impossible. The domain names were used to spread and control dangerous malware known as “Virut” . NASK’s actions are aimed at protecting Internet users from threats that involved the botnet built with Virut-infected …

In September this year CERT Polska participated in the “Information Assurance and Cyber Defense” symposium organized by NATO’s Science and Technology Organization. Our paper, titled “Proactive Detection and Automated Exchange of Network Security Incidents”, investigates issues related to sharing security-related data among CERTs and other organizations. We attempted to …

Recently there have been numerous reports about a new malware spreading through Skype. Since a couple of days, CERT Polska has also been taking an active role in disabling the Dorknet worm. A Polish security portal Niebezpiecznik.pl (article in Polish) mentioned that it also targets Polish users. We acquired …

In late August, Oracle has decided to release Java updates before the planned publication date on October 16 CPU (Critical Patch Update). According to reports update contains four security fixes. This year Oracle has already introduced 32 security fixes across all Java SE products. The immediate cause for the release …

Flame aka Flamer aka Skywiper is a sophisticated trojan application discovered in 2012. Since then it has been the subject of extensive analysis by malware research community. The trojan has been recognized as extraordinarily complicatied, with a modular design and advanced algorithms. The degree of Flame’s complexity raised many …

We have recently published an article (in Polish) about ransomware malware (mainly WeelsOf) spreading in Poland. This kind of ransomware was initally mentioned on the abuse.ch blog: https://www.abuse.ch/?p=3718. It demands 100 Euro or 500 PLN in order to unlock our computer. We also published …

CERT Polska received an Android malware sample. Both the application name ( poland_xxx.apk ) and its location (it was downloaded while visiting a popular Polish website, probably as a part of advertisement) may mean that Polish Internet users are targeted. Application sends three Permium-rate SMS, all of …

Yesterday Polish security portal, Niebezpiecznik.pl, has informed about a new kind of malware spreading through Facebook (article in Polish). CERT Polska got a sample of this malicious software to analyse. Despite Facebook being not a new attack vector, this malware sample is very interesting. Currently it is detected by …

This article is based on observations in the ARAKIS system, which is built on top of a network of honeypots. 1. Introduction In recent weeks we continued to observe significant increase of uTorrent (uTP based) network activity. Some parts of recorded traffic triggered high-level alerts in the ARAKIS system informing …

Less than three weeks left to submit your proposals for SECURE 2012 presentations. SECURE is an annual conference held by NASK and CERT Polska since 1996 with, dedicated entirely to IT security and addressed to the administrators, security team members and practitioners in this field. Particular emphasis is on practical …