Vulnerabilities / Threats
4/10/2012
11:52 AM
Connect Directly
Google+
Twitter
RSS
E-Mail
50%
50%

How Malware Gets Backed Up Along With Data

Malware is widely bypassing AV and other controls, getting backed up like any legitimate data, and re-infecting enterprise systems during restore.

Anonymous: 10 Facts About The Hacktivist Group
Anonymous: 10 Facts About The Hacktivist Group
(click image for larger view and for slideshow)
When malware slips past antivirus, it can get swept up in an enterprise's system backup and ultimately reinfect systems when the company restores applications from its contaminated backup.

Oliver Friedrichs, head of Sourcefire's cloud technology group, says this cycle occurs more often than you'd think. Friedrichs recently analyzed data collected from more than 2 million Sourcefire users during a one-month period and found that backup and file restoration applications often inadvertently restore malware.

His findings: During a one-month period, DropBox, a cloud-based file-sharing and backup service, restored 17,705 threats; Maxtor Backup and Restore's MaxSynch, 5,076 threats; 2BrightSparks SynchBack backup software, 165 threats; and FreeFileSync, 104 threats. These were users that had been running traditional AV products.

"We've historically talked about backing up malware as a hypothetical ... we assume it's been happening, but there hasn't been a clear way to see how frequently it's been taking place," Friedrichs says. "This [analysis] is a confirmation and affirmation that it is happening. We should be concerned about it and aware of backing up malware and then restoring malware."

Friedrichs says this demonstrates how malware is widely bypassing AV and other controls and then getting backed up like any legitimate data or files. Once the backup is "polluted," he says, if it is used to restore a system, [the malware] would also be restored onto the system once again.

[ Sometimes it's the little things--a misconfigured network proxy or an unused and forgotten port--that can make the difference in whether an organization suffers a major hack. See Simple Settings That Could Curtail Some Attacks.]

Is this an AV or a backup problem? Gleb Budman, co-founder and CEO of cloud-based backup service provider Backblaze, says his firm had explored whether it should provide malware scanning as part of its online backup service. But it just didn't make sense, for two reasons: "We encrypt all of the files [backed up] so they can't be scanned in our data center," Budman says. "We could scan on your client AV in our backup agent on your system--we thought about that--but if a user is already running AV, they would run it, then we would run it, and we'd be using up system resources twice. That seems kind of silly."

Read the rest of this article on Dark Reading.

Most external hacks of databases occur because of flaws in Web applications that link to those databases. In this report, Protecting Databases From Web Applications, we'll discuss how security teams, database administrators, and application developers can work together to improve the defenses of both front-end Web applications and back-end databases to prevent these attacks from succeeding. (Free registration required.)

Comment  | 
Print  | 
More Insights
Register for Dark Reading Newsletters
White Papers
Cartoon
Current Issue
Dark Reading December Tech Digest
Experts weigh in on the pros and cons of end-user security training.
Flash Poll
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2014-6477
Published: 2014-11-23
Unspecified vulnerability in the JPublisher component in Oracle Database Server 11.1.0.7, 11.2.0.3, 11.2.0.4, 12.1.0.1, and 12.1.0.2 allows remote authenticated users to affect confidentiality via unknown vectors, a different vulnerability than CVE-2014-4290, CVE-2014-4291, CVE-2014-4292, CVE-2014-4...

CVE-2014-4807
Published: 2014-11-22
Sterling Order Management in IBM Sterling Selling and Fulfillment Suite 9.3.0 before FP8 allows remote authenticated users to cause a denial of service (CPU consumption) via a '\0' character.

CVE-2014-6183
Published: 2014-11-22
IBM Security Network Protection 5.1 before 5.1.0.0 FP13, 5.1.1 before 5.1.1.0 FP8, 5.1.2 before 5.1.2.0 FP9, 5.1.2.1 before FP5, 5.2 before 5.2.0.0 FP5, and 5.3 before 5.3.0.0 FP1 on XGS devices allows remote authenticated users to execute arbitrary commands via unspecified vectors.

CVE-2014-8626
Published: 2014-11-22
Stack-based buffer overflow in the date_from_ISO8601 function in ext/xmlrpc/libxmlrpc/xmlrpc.c in PHP before 5.2.7 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code by including a timezone field in a date, leading to improper XML-RPC encoding...

CVE-2014-8710
Published: 2014-11-22
The decompress_sigcomp_message function in epan/sigcomp-udvm.c in the SigComp UDVM dissector in Wireshark 1.10.x before 1.10.11 allows remote attackers to cause a denial of service (buffer over-read and application crash) via a crafted packet.

Best of the Web
Dark Reading Radio
Archived Dark Reading Radio
Now that the holiday season is about to begin both online and in stores, will this be yet another season of nonstop gifting to cybercriminals?