Adserver compromised – legitimate sites serving malware

Saturday seemed like a quiet day, apart from the new Sober, however it was far from that. In the morning I received some local reports claiming that some respectable sites were distributing malware.

As it turns out, a popular Adserver had been compromised and scripts were modified in such a way that instead of just ads, malware was also delivered to the visitor. At least dozens of sites have unintentionally ‘distributed’ malware, many of them sites with greatly respected names.

This news comes after reports of other (ad)servers being compromised, all using Exploit.HTML.Iframebof to infect the system with malware.

Seeing that there currently is no patch for Exploit.HTML.Iframebof available, Kaspersky Lab strongly recommends anyone using MS Windows, but not running XP/SP2, to use an alternative browser.

A more detailed article on this subject will be posted soon on

Adserver compromised – legitimate sites serving malware

Your email address will not be published. Required fields are marked *



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.

Operation TunnelSnake

A newly discovered rootkit that we dub ‘Moriya’ is used by an unknown actor to deploy passive backdoors on public facing servers, facilitating the creation of a covert C&C communication channel through which they can be silently controlled. The victims are located in Africa, South and South-East Asia.

Subscribe to our weekly e-mails

The hottest research right in your inbox