Cloud
8/14/2014
05:25 PM
Connect Directly
Google+
Twitter
RSS
E-Mail
100%
0%

Traffic To Hosting Companies Hijacked In Crypto Currency Heist

Attacker likely a current or former ISP employee, researchers say.

A crypto currency thief hijacked traffic that was meant for large hosting companies including Amazon, Digital Ocean, OVH, and others earlier this year in a heist that earned him some $83,000 in profits in more than four months, researchers revealed last week.

Researchers with Dell SecureWorks Counter Threat Unit published the new research on the attacks in conjunction with the Black Hat USA show in Las Vegas. Dell SecureWorks says some 51 networks were compromised from 19 Internet service providers as the thief redirected crypto currency miners to his own mining pool and stole their profits -- to the tune of $9,000 per day. The crypto currency hijack also interrupted network traffic for other users in the netblocks he targeted, the researchers say, but the attacker was mainly interested in the miners.

"They were man-in-the-middle hijacking crypto currency. I found my [account] was hijacked, too," says Joe Stewart, director of malware research for Dell SecureWorks. When Stewart first heard of the crypto currency theft, he figured the attacker had hijacked Border Gateway Protocol (BGP) routes and redirected their mining to the rogue systems. The Internet's BGP routing protocol basically connects networks on the Internet.

It turns out Stewart was correct: The attacker had blasted phony BGP broadcasts that redirected the victims' crypto currency traffic to his server. "He only hijacked it for brief periods where he was able to capture and trap a large section of miners," Stewart says, so the hijack was not necessarily noticeable.

The attacker was successful in part because crypto currency miners employ a protocol called Stratum that has little or no security. "They're not using HTTPS, so any mining pool can send or reconnect to send to a different IP. [The protocol] trusts that they are talking to the real server."

It was that inherent trust that the hijacker capitalized on. But Stewart says the culprit also needed the administrative rights to pull off the BGP spoof, so it was likely an employee or former employee of an ISP. "Or a hacker hacked a router."

The researchers ultimately traced the malicious BGP announcements to a single router at an ISP in Canada. "We reported it to the ISP, and gave them large logs." The activity ultimately came to a halt, he says, and the ISP didn't provide any additional information on its resolution.

Dell SecureWorks' Pat Litke, who worked with Stewart on investigating the theft, says at the heart of the problem is the ISP not having proper oversight of its offending employee or former employee.

But even more unsettling was how the attacker was able to temporarily commandeer all of those IP addresses. The affected hosting providers "have a huge range of IP addresses," says Litke. "The addresses being hijacked were fairly negligible. It didn't impact them… They weren't losing money, and their customers didn't notice."

The only noticeable glitch would be that users wouldn't be able to ping a server, but that would have been seen as a temporary network problem. "Only the miners got trapped for a longer period of time," Stewart says. "We didn't see any big website hijacked in that."

It was when miners started talking online in a Bitcoin forum about lost funds that it become obvious something had gone awry. On March 22, a user named "caution" noted sketchy activity in the wafflepool.com mining pool. Other miners chimed in with similar observations of their mining systems being redirected to an IP address they didn't recognize, and ultimately, their loss of funds.

According to Dell SecureWorks, some $2.6 million in crypto currency mining occurs daily. The researchers suggest that ISPs use the Resource Public Key Infrastructure service, and miners use a Secure Sockets Layer (SSL) client to encrypt their traffic. "Miners should also implement server certificate validation. This validation ensures that the certificate the pool server sends when establishing the connection is valid and authorized for use with the connected domain, even if the domain's IP address changes," the researchers wrote in their report about the attacks.

Kelly Jackson Higgins is Executive Editor at DarkReading.com. She is an award-winning veteran technology and business journalist with more than two decades of experience in reporting and editing for various publications, including Network Computing, Secure Enterprise ... View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Kelly Jackson Higgins
50%
50%
Kelly Jackson Higgins,
User Rank: Strategist
8/15/2014 | 9:33:10 AM
Re: Awesome
Crytpo currency mining is fraught with security risk. So I suppose the heist was not surprising given the lack of security inherent in mining. But spoofing BGP was a pretty interesting way to pull it off, for sure.
securityaffairs
50%
50%
securityaffairs,
User Rank: Ninja
8/15/2014 | 7:33:20 AM
Awesome
It is the demonstration of the capabilities of cybercrime ecosystem. This hack is very interesting, the crocks are also exploring with interest the opportunity offered by virtual currencies.

 
Register for Dark Reading Newsletters
White Papers
Cartoon
Latest Comment: nice post
Current Issue
Flash Poll
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2014-1750
Published: 2015-07-01
Open redirect vulnerability in nokia-mapsplaces.php in the Nokia Maps & Places plugin 1.6.6 for WordPress allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a URL in the href parameter to page/place.html. NOTE: this was originally reported as cross-sit...

CVE-2014-1836
Published: 2015-07-01
Absolute path traversal vulnerability in htdocs/libraries/image-editor/image-edit.php in ImpressCMS before 1.3.6 allows remote attackers to delete arbitrary files via a full pathname in the image_path parameter in a cancel action.

CVE-2015-0848
Published: 2015-07-01
Heap-based buffer overflow in libwmf 0.2.8.4 allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted BMP image.

CVE-2015-1330
Published: 2015-07-01
unattended-upgrades before 0.86.1 does not properly authenticate packages when the (1) force-confold or (2) force-confnew dpkg options are enabled in the DPkg::Options::* apt configuration, which allows remote man-in-the-middle attackers to upload and execute arbitrary packages via unspecified vecto...

CVE-2015-1950
Published: 2015-07-01
IBM PowerVC Standard Edition 1.2.2.1 through 1.2.2.2 does not require authentication for access to the Python interpreter with nova credentials, which allows KVM guest OS users to discover certain PowerVC credentials and bypass intended access restrictions via unspecified Python code.

Dark Reading Radio
Archived Dark Reading Radio
Marc Spitler, co-author of the Verizon DBIR will share some of the lesser-known but most intriguing tidbits from the massive report