Financial threats

A Tweet posted recently by AVG researcher, Jakub Kroustek, suggested that a new ransomware, written entirely in Python, had been found in the wild, joining the emerging trend for Pysomwares such as the latest HolyCrypt, Fs0ciety Locker and others.

In this article, we discuss how it is possible to take advantage of errors made in the implementation of a cryptographic scheme, and how mistakes by malware writers allow us to help users restore their encrypted data.

We discovered a new variant of a Brazilian-made ransomware, that is being used to infect local companies and hospitals, directly affecting innocent people, encrypting their files and asking to pay the ransom.

The report comprises two papers in which we analyze all existing methods of authentication used in ATMs and those expected to be used in the near future, including: contactless authentication through NFC, one-time password authentication and biometric authentication systems, as well as potential vectors of attacks using malware, through to network attacks and attacks on hardware components.

After a successful infection, RAA executes its main task, i.e. encrypts the user’s files. However, it doesn’t stop there: some versions of RAA also include a Pony Trojan file, which steals confidential information from the infected computer.

In June, 2016, the Russian police arrested the alleged members of the criminal group known as Lurk. The police suspected Lurk of stealing nearly three billion rubles. The story of Lurk gives some idea of the amount of work that has to be done to obtain enough evidence to arrest and prosecute suspects.

In the second quarter of 2016, Kaspersky Lab’s web antivirus detected 16,119,489 unique malicious objects: scripts, exploits, executable files, etc. 54,539,948 unique URLs were recognized as malicious by web antivirus components.

Bankers and encryptors, ransomware and spyware, old and new exploits; APT attacks, ATM infection, spear phishing and fraud targeting large numbers of users – cybercriminals continue their hunt for money and information

We recently found that a new logic in the latest version of the Shade encryptor currently being spread widely within the territories of Russia and CIS. On the basis of this logic, the ransomware checks the computer for any involvement in accounting activities and, if the check is successful, installs remote control tools into the compromised system instead of encrypting the victim’s files.

While we were researching the malicious program Lurk in early February 2016, we discovered an interesting oddity in how this banking Trojan spreads. From the data we had, it emerged that the users attacked by Lurk also installed the remote administration software Ammyy Admin on their computers.

The number of users attacked with ransomware is huge. But how big is it? Ransomware seems to be a global threat. But maybe there are regions at a higher risk of danger? There seem to be a lot of ransomware malware groups. But what are the most widespread and dangerous?

The number of users attacked with ransomware is huge. But how big is it? Ransomware seems to be a global threat. But maybe there are regions at a higher risk of danger? There seem to be a lot of ransomware malware groups. But what are the most widespread and dangerous?

Over the last two years, deep in the slums of the Internet, a different kind of underground market has flourished. The short, cryptic name perhaps doesn’t say much about it: xDedic. However, on this obscure marketplace anyone can purchase more than 70,000 hacked servers from all around the Internet.

In this blog post we discuss the threats to visitors aiming to travel to Brazil to watch the Olympic Games and to those planning to watch it online. We’ll talk about phishing attacks, highlight WiFi security and touch upon physical security that involves the usage of USB charging spots, the problem of credit card cloning and ATM skimmers.

We have written about this banker Trojan before. It caught our attention almost as soon as it appeared because it used a fileless spreading mechanism – malicious code was not saved on the hard drive and ran in memory only. However, until now no detailed description of Lurk had been published.