Government, Health Care Web Sites Attacked
A scan of Web servers by Internet security company Finjan Inc. has found more
than 1,000 legitimate Web sites that had been compromised by a new wave of attacks
in recent weeks.
High percentages of the compromised sites, which serve up malicious code to
unsuspecting visitors, belonged to government at 13 percent, and to health care
organizations at 12 percent, said Finjan Chief Technology Officer Yuval Ben-Itzhak.
"We started to see it at the end of last month," Ben-Itzhak said.
"But most of [the compromised] domains we found in the last two weeks."
The compromises were found using Finjan's SecureBrowsing security tool.
The attack toolkit being used is named Asprox, and has been in use for several
years, having gained popularity with cybercriminals during 2007.
"This is not groundbreaking," Ben-Itzhak said. The tool uses a
well-established SQL-injection attack to compromise the sites. But the sites
being targeted appear to indicate a shift in the underground economy that has
grown up harvesting sensitive information from online activities.
"For government, we still don't have the reason," Ben-Itzhak
said. "We believe the criminals are targeting health care [data] because
they can sell it for a higher price."
The black market price for stolen credit card information has declined sharply
in the last year, from around $100 per account to $15 or $20 each, he said.
"It's supply and demand." Credit-card information can be easy
to steal and has been targeted by many criminals. "It explains why they're
looking for new types of information that they can sell for a higher [profit]
The Asprox toolkit searches Google for Web pages with an ".asp"
file extension. These pages use the Microsoft Active Server Pages server-side
scripting environment for creating and serving dynamic Web pages. It was widely
used from around 1998 to 2003, when it was largely replaced with Web development
tools that provide more security. But there still are many Web sites using it.
"It is not a vulnerability in the Microsoft tool," Ben-Itzhak said.
"It is because of the way the pages were designed and not because of the
To protect themselves from the attack, he recommended that enterprises use
application firewalls in front of their servers to block the attacks, and that
consumers use real-time content inspection tools to protect their browsers.
"They cannot assume that legitimate Web sites will remain safe all the time,"
Finjan offers a free browser plug-in for content inspection, but Ben-Itzhak
said that user uptake for the technology still is slow -- only about 25 percent
compared with more than 90 percent for traditional signature-based anti-virus
William Jackson is the senior writer for Government Computer News (GCN.com).