Cerber ransomware has acquired the reputation of being one of the most rapidly evolving ransomware families to date. Just in May, we pointed out how it had gone through six separate versions with various differences in its routines. Several months later and it seems to have evolved again, this time adding cryptocurrency theft to its routines. This is on top of its normal ransomware routines, giving the attackers two ways to profit off of one infection.Read More
As cybercriminals start to focus on pulling off attacks without leaving a trace, fileless malware will become a more common attack method. However, many of these malware are fileless only while entering a user’s system, as they eventually reveal themselves when they execute their payload. Attacks that use completely fileless malware are a rare occurrence, so we thought it important to discuss a new trojan known as JS_POWMET that uses a completely fileless infection chain making it more difficult for anti-malware engineers to examine.Read More
A seven-year old vulnerability in Samba—an open-source implementation of the SMB protocol used by Windows for file and printer sharing—was patched last May but continues to be exploited. According to a security advisory released by the company, the vulnerability allows a malicious actor to upload a shared library to a writable share, causing the server to load and execute it. If leveraged successfully, an attacker could open a command shell in a vulnerable device and take control of it. It affects all versions of Samba since 3.5.0.Read More
The information-stealing RETADUP worm that affected Israeli hospitals is actually just part of an attack that turned out to be bigger than we first thought—at least in terms of impact. It was accompanied by an even more dangerous threat: an Android malware that can take over the device.
Detected by Trend Micro as ANDROIDOS_GHOSTCTRL.OPS / ANDROIDOS_GHOSTCTRL.OPSA, we’ve named this Android backdoor GhostCtrl as it can stealthily control many of the infected device’s functionalities.
There are three versions of GhostCtrl. The first stole information and controlled some of the device’s functionalities without obfuscation, while the second added more device features to hijack. The third iteration combines the best of the earlier versions’ features—and then some. Based on the techniques each employed, we can only expect it to further evolve.Read More