wonderfully unique software solutions

User restrictions not the answer to fileless threats: Kaspersky

Companies can protect themselves from downloader, miner, fileless and insider threats without tightening up user policies, according to Kaspersky technical writers Oleg Zaitsev, Rodion Gadyrshin and Evgeny Lopatin.

“When a malicious script is launched through a legitimate application, this can be a challenge. For example, when a phishing email document is opened in Microsoft Office, all actions will be performed by the office application,” they write on the Kaspersky security blog.

“Such authorised software is often used on a large number of devices, and it is not feasible to simply ban access to it. Antivirus solutions will also recognise these files as ‘trusted’.”

Legitimate software can typically simply go ahead and execute atypical processes initiated by malicious code. Even administrators performing system maintenance aren’t immune to this tactic.

“In most medium-sized companies’ cybersecurity strategies, even with an endpoint solution, there are likely to still be gaps that can and should be closed,” the Kaspersky writers note.

According to Kaspersky statistics, of all the anomalous activity detected in legitimate Windows Management Instrumentation (WMI) processes, 67% were fileless downloaders of the Emotet banking trojan and the WannMine cryptominer, they wrote.

Fileless malware does not need administrator privileges to perform its malicious actions. Another risk is when malicious activity is initiated by an employee on the network. Some malware can use legitimate processes as a disguise, such as svchost.exe.

That’s why Kaspersky developed Adaptive Anomaly Control, a module in Kaspersky Endpoint Security.

The technology is ‘trained’ over about two weeks to recognise how applications work and which actions are performed regularly by staff on the job. It also operates using sets of rules, statistics and exceptions covering office programs, WMIs, script engines and frameworks as well as abnormal program activities.

“The policies can be tuned for different groups of users individually and inherited as part of user profiles. For example, financial department employees would never legitimately need to execute JavaScript, but the development team will,” say the Kaspersky team.

“However, it is equally important to use the entire range of protective measures including signature-based malware detection, behavioural analysis, vulnerability detection and patch management, and exploit prevention. These technologies help to block most generic attacks.”

Read the full blog with examples.

(Photo by Mimi Thian on Unsplash)

Recent Articles

ShareGate explains Azure updates for Microsoft cloud users

Updates to Azure are adding up to "major improvements" in cloud governance and infrastructure efficiency, according to ShareGate's Xander Oortgiesen.

How a global pump manufacturer gains from OpenText’s content suite

Pump manufacturer Seepex says it is already seeing service improvements across a global customer base via enterprise content management from OpenText.

Intel targets edge computing and 5G services advances with Red Hat

Edge computing and 5G services are set for a boost from Intel announcements at the virtual iteration of the global Consumer Electronics...

Trojans, backdoor and malicious worm attacks target home workers

The proportion of Trojans as an overall share of malware detected leaped nearly 41% year on year during 2020, according to Kaspersky's...

Why no-code software could be key to the post-Covid business

'No code' software platforms might help businesses adapt as they scramble to emerge from the SARS-CoV-2 crisis this year, according to Smartsheet's...

Related Stories

Leave A Reply

Please enter your comment!
Please enter your name here

Weirdware monthly - Get the latest news in your inbox