Feeds

Infection-by-cache risk unearthed

Caches give malware longer life

SANS - Survey on application security programs

Malware housed on storage and caching servers, such as those used by ISPs, enterprises, and leading search engines, continues to pose a risk after websites containing malicious code have been pulled.

So says web security firm Finjan, which warns that instead of pointing users towards sites hosting malware, hackers could try to dupe users into visiting contaminated caches. The trick might be used to foil URL filtering products, it says.

"This is more than just a theoretical danger," Finjan chief technology officer Yuval Ben-Itzhak said. "It is possible that storage and caching servers could unintentionally become the largest 'legitimate' storage venue for malicious code. Such 'infection-by-proxy' introduces new risks for businesses and consumers where trusted web addresses become a potential distributor of malicious code - making URL Filtering solutions blind."

Finjan has published obfuscated examples of malware found on storage and caching servers to support its claims.

One well-known hacking tactic involved breaking into vulnerable web servers to install Trojan downloader code, which often takes advantage of browser vulnerabilities to download malware onto target PC (examples here and here). Finjan's point is that users visiting a cached copy of such (potentially mainstream) sites would be infected even if the main site pulled the malware. Search engines are not doing enough to flush their caches, it warns."

Finjan has sent search engines and service providers technical details of its discovery, uncovered by Finjan's Malicious Code Research Centre (MCRC) during its quarterly security trends analysis, and is continuing its dialogue with these firms in the hope of nipping the problem in the bud.

Finjan's net security report, which also discusses the increased use by hackers of Web 2.0 technologies to upload malware and the illicit trade in exploit code, can be found here (registration required). ®

High performance access to file storage

More from The Register

next story
Obama allows NSA to exploit 0-days: report
If the spooks say they need it, they get it
Samsung Galaxy S5 fingerprint scanner hacked in just 4 DAYS
Sammy's newbie cooked slower than iPhone, also costs more to build
Putin tells Snowden: Russia conducts no US-style mass surveillance
Gov't is too broke for that, Russian prez says
Snowden-inspired crypto-email service Lavaboom launches
German service pays tribute to Lavabit
Mounties always get their man: Heartbleed 'hacker', 19, CUFFED
Canadian teen accused of raiding tax computers using OpenSSL bug
One year on: diplomatic fail as Chinese APT gangs get back to work
Mandiant says past 12 months shows Beijing won't call off its hackers
Call of Duty 'fragged using OpenSSL's Heartbleed exploit'
So it begins ... or maybe not, says one analyst
prev story

Whitepapers

Top three mobile application threats
Learn about three of the top mobile application security threats facing businesses today and recommendations on how to mitigate the risk.
Combat fraud and increase customer satisfaction
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Five 3D headsets to be won!
We were so impressed by the Durovis Dive headset we’ve asked the company to give some away to Reg readers.
SANS - Survey on application security programs
In this whitepaper learn about the state of application security programs and practices of 488 surveyed respondents, and discover how mature and effective these programs are.