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In February 2022 we observed the technique of putting the shellcode into Windows event logs for the first time “in the wild” during the malicious campaign. It allows the “fileless” last stage Trojan to be hidden from plain sight in Read More …
A fileless campaign that used a new HCrypt variant to distribute numerous remote access trojans (RATs) in victim systems uses a newer obfuscation mechanism compared to what has been observed in past reports. It reached the peak of activity in Read More …
Trend Micro researchers have recently encountered a Negasteal (also known as Agent Tesla) variant that used hastebin for the fileless delivery of the Crysis (also known as Dharma) ransomware. This is the first time that we have observed Negasteal with Read More …
In the first half of 2020, the most common critical-severity cybersecurity threat to endpoints was fileless malware, according to a recent analysis of telemetry data from Cisco. Fileless threats consist of malicious code that runs in memory after initial infection, Read More …
As security measures get better at identifying and blocking malware and other threats, modern adversaries are constantly crafting sophisticated techniques to evade detection. One of the most persistent evasion techniques involves fileless attacks, which do not require malicious software to Read More …
