Incidents

Internationalized Domain Names used to spread malware

As we published last year, the first Internationalized domain names (IDN) using non-Latin characters appeared on the internet; these contain characters from Cyrillic, Arabic and other languages. We also started to see some news domains using diacritics such as “, , , , , , , , , , , , , “ in their names, or accents, for instance as seen in http://amarylliscomunicao.com.br.

It’s also important to point that some browsers and mail readers aren’t prepared to show these characters correctly. A domain in Arabic such as http://وزارة-الأتصالات.مصر/ might be shown as http://xn--4gbrim.xn—-ymcbaaajlc6dj7bxne2c.xn--wgbh1c in your mailbox. We call this alternate way to show non-latin characters punycode.

During our regular monitoring of malicious activities in Brazil, we discovered an interesting and legitimate URL shortener service which is using the diacritics “.” in his name:

URL shortener service using diacritic symbol

And everybody knows that cybercriminals love to use URL shortener services. In this case, there’s no exception – various Brazilian bad guys started to use this service to decrease the size of URLs in phishing messages and also to rise the curiosity of users, presenting a URL with accents:

Malicious e-mail using a link with diactric symbol

The message above shows a link pointing to a very common Brazilian trojan banker detected as Trojan-Downloader.Win32.Delf.bbwp.

So, when receiving e-mail messages, be careful with short links, even those showing odd accents and non-latin characters!

Internationalized Domain Names used to spread malware

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Reports

LuminousMoth APT: Sweeping attacks for the chosen few

We recently came across unusual APT activity that was detected in high volumes, albeit most likely aimed at a few targets of interest. Further analysis revealed that the actor, which we dubbed LuminousMoth, shows an affinity to the HoneyMyte group, otherwise known as Mustang Panda.

WildPressure targets the macOS platform

We found new malware samples used in WildPressure campaigns: newer version of the C++ Milum Trojan, a corresponding VBScript variant with the same version number, and a Python script working on both Windows and macOS.

Ferocious Kitten: 6 years of covert surveillance in Iran

Ferocious Kitten is an APT group that has been targeting Persian-speaking individuals in Iran. Some of the TTPs used by this threat actor are reminiscent of other groups, such as Domestic Kitten and Rampant Kitten. In this report we aim to provide more details on these findings.

Andariel evolves to target South Korea with ransomware

In April 2021, we observed a suspicious Word document with a Korean file name and decoy. It revealed a novel infection scheme and an unfamiliar payload. After a deep analysis, we came to a conclusion: the Andariel group was behind these attacks.

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