Exploit This

Security News, Exploits, and Vulnerabilities.

Nhash: petty pranks with big finances

In an earlier publication we noted that cybercriminals were making use of social engineering to install this sort of software on users’ computers. This time, we’d like to dwell more on how exactly the computers of gullible users start working for cybercriminals.

Spam and phishing in Q3 2017

In terms of the average share of spam in global email traffic (58.02%), the third quarter of 2017 was almost identical to the previous reporting period: once again growth was slightly more than one percentage point – 1.05 (and 1.07 p.p. in Q2 2017). As in previous quarters, spammers were quick to react to high-profile events and adapted their fraudulent emails to the news agenda.

A simple example of a complex cyberattack

We’re already used to the fact that complex cyberattacks use 0-day vulnerabilities, bypassing digital signature checks, virtual file systems, non-standard encryption algorithms and other tricks. Sometimes, however, all of this may be done in much simpler ways, as was the case in the malicious campaign that we detected a while ago – we named it ‘Microcin’ after microini, one of the malicious components used in it.

Miners on the Rise

Over the last month alone, we have detected several large botnets designed to profit from concealed crypto mining. We have also observed growing numbers of attempts to install miners on servers owned by organizations. When these attempts are successful, the companies’ business processes suffer because data processing speeds fall substantially.

Dissecting the Chrome Extension Facebook malware

The Facebook malware that spread last week was dissected in a collaboration with Kaspersky Lab and Detectify. We were able to get help from the involved companies and cloud services to quickly shut down parts of the attack to mitigate it as fast as possible.

Spam and phishing in Q2 2017

In Q2 2017, the average share of spam in global email traffic amounted to 56.97%, which was only 1.07 p.p. more than in the previous quarter. One of the most notable events of this quarter – the WannaCry epidemic – did not go unnoticed by spammers: numerous mass mailings contained offers of assistance in combating the ransomware.

Two Tickets as Bait

Over the previous weekend, social networks were hit with a wave of posts that falsely claimed that major airlines were giving away tickets for free. Users from all over the world became involved in this: they published posts that mentioned Emirates, Air France, Aeroflot, S7 Airline, Eva Air, Turkish Airlines, Air Asia, Air India, and other companies.

Spam and phishing in Q1 2017

Although the beginning of Q1 2017 was marked by a decline in the amount of spam in overall global email traffic, in March the situation became more stable, and the average share of spam for the quarter amounted to 55.9%. The US (18.75%) remained the biggest source of spam, followed by Vietnam (7.86%) and China (7.77%).

Personalized Spam and Phishing

Lately we have been noticing an opposite tendency occurring quite often, wherein fraud becomes personalized and spammers invent new methods to persuade the recipient that the message is addressed personally to him. Thus, in the malicious mailing that we discovered last month, spammers used the actual postal addresses of the recipients in messages to make them seem as credible as possible.

Spam and phishing in 2016

2016 saw a variety of changes in spam flows, with the increase in the number of malicious mass mailings containing ransomware being the most significant. These programs are readily available on the black market, and in 2017 the volume of malicious spam is unlikely to fall.

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