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Tag: malware

Yoroi Welcomes "Yomi: The Malware Hunter"

Nowadays malware represents a powerful tool for cyber attackers and cyber criminals all around the world, with over 856 million of distinct samples identified during the last year it is, with no doubt, one of the major kinds of threat that companies and organizations are tackling to keep running their business without losing resources, time, […]

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Ursnif: The Latest Evolution of the Most Popular Banking Malware

Introduction Few days ago, the researchers of ZLab Yoroi-Cybaze dissected another attack wave of the infamous Ursnif malware, also known as Gozi ISFB, an offspring of the original Gozi which source code was leaked in 2014. Ursnif/Gozi is active from over a decade and was one of the most active malwares listed in 2017 and […]

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Ghidra SRE: The AZORult Field Test

Introduction One of the most anticipated moments in the infosec community during the last few months was, with no doubt, the Ghidra public release. On the 5th of March, at the RSA conference, Ghidra has been presented to the public revealing the inner details of the Software Reverse Engineering (SRE) framework that National Security Agency […]

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Decrypting the Qrypter Payload

Introduction During the last weeks, Yoroi’s monitoring operation intercepted some malicious emails required further attention: they were sent to a very few organizations and the contents was specifically tailored for Italian speaking targets. This messages warned the users about imminent summons against them, inviting them to read the attached lawsuit, a not so innocent looking […]

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The Ursnif Gangs keep Threatening Italy

Introduction The Ursnif trojan confirms itself as one of the most active malware threats in cyberspace, even during the past days, when new attack attempts reached several organization across Italy. Cybaze-Yoroi ZLab teams dissected its infection chain to keep tracking the evolution of this persistent malware threat, analyzing its multiple stages, each one with the […]

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Campagna di Attacco Ransomware

Proto: N070319. Con la presente Yoroi desidera informarLa relativamente ad una pericolosa campagna di attacco rivolta ad aziende italiane. Le email intercettate sono appositamente curate per ingannare i malcapitati destinatari simulando l’invio di candidature spontanee per posizioni vacanti. Il documento Office in allegato contiene però codice macro in grado di infettare la macchina bersaglio con […]

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The Document that Eluded AppLocker and AMSI

Introduction Few days ago, during intel sources monitoring operation, the Cybaze-Yoroi ZLAB team encountered an interesting Office document containing some peculiarities required a deeper analysis: its payload includes techniques suitable to bypass modern Microsoft security mechanisms such as AppLocker, the application whitelisting security feature in place in well-configured Windows OSes, and the newer Anti-Malware Scan […]

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Torrent Risks: an Analysis

Digital media sharing is one of the most relevant phenomena since the advent of the internet. During the 80’s and 90’s, with the rapid growth the Internet, people around the world started sharing digital stuff protected by copyright, through particular communication protocols and programs such as FTP, IRC, etc. At the time, only a few […]

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Apex Legends for Android: a Fake App could Compromise your Smartphone

Introduction At the beginning of 2019, Electronic Arts released a game for PC, XBox One and Playstation 4 named Apex Legends. It is a battle royal game like Titanfall and Fortnite, the latter is the direct competitor in the battle royale gaming panorama. The game has achieved great success in the gamers community with 25 […]

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Evading AV with JavaScript Obfuscation

Introduction Few days ago, Cybaze-Yoroi ZLAB researchers spotted a suspicious JavaScript file needing further attention: it leveraged several techniques in order to evade all AV detection and no one of the fifty-eight antivirus solution hosted on the notorious VirusTotal platform detected it. For this reason, we decided to dissect it and investigate what kind of […]

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Op. “Pistacchietto”: An Italian Job

Introduction In the past weeks, a new strange campaign emerged in the Italian landscape. It has been baptized “Operation Pistacchietto” from a username extracted from a Github account used to serve some part of the malware. This campaign has been initially studied by C.R.A.M. researchers reporting the attacker seems to be Italian, as evidenced by […]

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GoBrut: A new GoLang Botnet

Introduction Malware written in Go programming language has roots almost a decade ago, few years after its first public release back in 2009: starting, for instance, from InfoStealer samples discovered since 2012, abused in cyber-criminal campaigns, and ending into one of the most advanced and modern cyber arsenal, the Sofacy one. Times ago it was […]

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