Silence group targeting Russian Banks via Malicious CHM

In November 2018 we followed up on a tweet mentioning a potential malicious code disseminated in CHM (Microsoft Compiled HTML Help). A preliminary analysis caught the attention of our Threat Analysis and Intelligence team as it yielded interesting data that, among other things, shows that the attack campaign was targeting employees from financial entities, specifically […]

Ursnif reloaded: tracing the latest trojan campaigns

On the 9th of October our customers started reporting the same kind of incident over the span of a few hours. The identified activity appears to be linked to the banking Trojan Ursnif, a long active malware, whose roots can be traced back to 2007 together with ZeuS and SpyEye, still with strong infection capabilities in […]

Banks and crypto wallets: unveiling a global malware campaign using Zeus/Panda

For the past weeks our Threat Intelligence team has been following an enxtesive campaign, possibly operated by the same group, targeting a large amount of financial institutions, cyptocurrency wallets and the occasional Google and Apple accounts. The attackers target their victims both with Phishing emails, typo-squatted domains and malicious attachments that eventually lead to the […]

Dridex Downloader Tries New Sandbox-Evasion Techniques

Dridex is currently one of the most active and widespread banking malwares. Like Locky ransomware also Dridex is dispatched through a massive spam mail campaign that uses the Necurs botnet. Our sensors have long been tracking these spam campaigns and recent captured emails contain a Word document that drops Dridex. In our latest samples we have observed a delay on execution of the downloader […]

Uncovering a ransomware distribution operation – Part 2

In Part 1 we’ve analyzed a vast Crypt0L0cker ransomware distribution operation currently affecting continental Europe and ready to jump to new countries. In this second post we’ll analyze in detail the server side code used to dispatch the victims towards the correct websites, up to the ransomware itself. We’ll also analyze the ransomware behaviour and how […]

Nemucod meets 7-Zip to launch ransomware attacks

Nemucod is a Javascript downloader used to perform all kind of nasty stuff, recently a “ransomware” routine has been found in some samples, even if a simple one: a XOR with a predefined 255 bytes key. In other instances we have observed the download of a malicious executable responsible for the encryption process. What we will analyze this […]

Poweliks File-less Malware Keeps Evolving – Update 1

Poweliks (actually we should say Kovter) is a well-known and studied click-fraud malware that made its first appearance in early August 2014, it became famous very quickly due the fact that it used a persistence mechanism that allowed it to be fileless on disk, taking advantage of the Windows Registry and also because it adopted new […]