Feeds

'Fileless' malware installs into RAM

Exploit found in Russian adware invades process, doesn't install files

5 things you didn’t know about cloud backup

Researchers at Kaspersky Labs have found malware which, unusually, does not install any files on its victims PCs.

The researchers aren’t quite sure how unusual it is, describing it as both “unique” and “very rare”, but no matter how scarce this type of malware is it does sound rather nasty as it “… uses its payload to inject an encrypted dll from the web directly into the memory of the javaw.exe process.” That mode of operation means Windows and MacOS are both affected by the exploit, which is hard for many antivirus programs to spot given it runs within a trusted process.

Once under your machine’s guard, the malware tries to attack Windows User Account Control so it install the Lurk Trojan and connect to an associated botnet. That installation attempt is the malware’s key task, as living in RAM means fileless malware won’t survive a system reboot.

That the malware is able to do so is down to a known Java vulnerability, CVE-2011-3544 to be precise. Snoracle has long-since patched that hole. Another mitigating factor that will hopefully make this a short-lived attack is the fact Kaspersky picked it up in ads served only on Russian web sites. The security company has informed the ad-serving company and the offending code has been withdrawn.

But researcher Sergey Golavanov also warns “we cannot rule out that the same exploit and the same fileless bot will be used against people in other parts of the world: they can be distributed via similar banner or teaser networks in other countries. It is likely that other malware, not just Trojan-Spy.Win32.Lurk will be used in the process. that "we cannot rule out that the same exploit and the same fileless bot will be used against people in other parts of the world: they can be distributed via similar banner or teaser networks in other countries. It is likely that other malware, not just Trojan-Spy.Win32.Lurk will be used in the process.” ®

Secure remote control for conventional and virtual desktops

More from The Register

next story
One HUNDRED FAMOUS LADIES exposed NUDE online
Celebrity women victimised as Apple iCloud accounts reportedly popped
Rubbish WPS config sees WiFi router keys popped in seconds
Another day, another way in to your home router
Goog says patch⁵⁰ your Chrome
64-bit browser loads cat vids FIFTEEN PERCENT faster!
NZ Justice Minister scalped as hacker leaks emails
Grab your popcorn: Subterfuge and slur disrupts election run up
HP: NORKS' cyber spying efforts actually a credible cyberthreat
'Sophisticated' spies, DIY tech and a TROLL ARMY – report
NIST to sysadmins: clean up your SSH mess
Too many keys, too badly managed
Scratched PC-dispatch patch patched, hatched in batch rematch
Windows security update fixed after triggering blue screens (and screams) of death
Attack flogged through shiny-clicky social media buttons
66,000 users popped by malicious Flash fudging add-on
New Snowden leak: How NSA shared 850-billion-plus metadata records
'Federated search' spaffed info all over Five Eyes chums
prev story

Whitepapers

Endpoint data privacy in the cloud is easier than you think
Innovations in encryption and storage resolve issues of data privacy and key requirements for companies to look for in a solution.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Advanced data protection for your virtualized environments
Find a natural fit for optimizing protection for the often resource-constrained data protection process found in virtual environments.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Next gen security for virtualised datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.