Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Comments
WannaCry's 'Kill Switch' May Have Been a Sandbox-Evasion Tool
Newest First  |  Oldest First  |  Threaded View
root1657
50%
50%
root1657,
User Rank: Apprentice
5/28/2017 | 10:45:04 PM
Re: I don't believe it was anti-sandbox either... it was a self-safety
I'm not sure that it tells us about thier relative sophistication, because we dont have any of their other work to compare it to. I'm also not sure that attrbution of source or skill is a critical factor here. 

As I see this, the area where it is useful is in realizing that if they used some kind of safe switch so it couldnt attack it's creators in the lab, then perhaps the same could be used in our environments to help the defense as well. It would be a trivial matter for any organization to make the noted DNS entry properly resolve to a sinkhole in house, which would be enough to trigger the safey on this malware, and protect the organization, regardless of what happenes with the real DNS entry out in the world (which has been attacked by some jerks that want to bring it down).

Maybe it's useful in these attacks to look for signs and indicators of built in lab safety that may have been in the code and left in, so we can replicate the safeties at the same time we fight the malicious code.
Kelly Jackson Higgins
50%
50%
Kelly Jackson Higgins,
User Rank: Strategist
5/23/2017 | 10:35:32 AM
Re: I don't believe it was anti-sandbox either... it was a self-safety
Interesting, root1657. Does that tell you the attackers are more or less sophisticated than if it were an anti-sandbox measure?
root1657
50%
50%
root1657,
User Rank: Apprentice
5/22/2017 | 12:58:42 AM
I don't believe it was anti-sandbox either... it was a self-safety
I've been reading a lot of analysis, and I think the domain check was a method to prevent self infection (on the part of the threat actor). Doing this would be an effective safety on the weapon in your own evil lab, as you could use a few ficticious domains for this safety check, and have them resolve in house. Bombs and rockets usually dont arm until they are away from the laucher, so why should they design malware any differently?


97% of Americans Can't Ace a Basic Security Test
Steve Zurier, Contributing Writer,  5/20/2019
How Security Vendors Can Address the Cybersecurity Talent Shortage
Rob Rashotte, VP of Global Training and Technical Field Enablement at Fortinet,  5/24/2019
TeamViewer Admits Breach from 2016
Dark Reading Staff 5/20/2019
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Current Issue
Building and Managing an IT Security Operations Program
As cyber threats grow, many organizations are building security operations centers (SOCs) to improve their defenses. In this Tech Digest you will learn tips on how to get the most out of a SOC in your organization - and what to do if you can't afford to build one.
Flash Poll
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2019-7068
PUBLISHED: 2019-05-24
Adobe Acrobat and Reader versions 2019.010.20069 and earlier, 2019.010.20069 and earlier, 2017.011.30113 and earlier version, and 2015.006.30464 and earlier have an use after free vulnerability. Successful exploitation could lead to arbitrary code execution .
CVE-2019-7069
PUBLISHED: 2019-05-24
Adobe Acrobat and Reader versions 2019.010.20069 and earlier, 2019.010.20069 and earlier, 2017.011.30113 and earlier version, and 2015.006.30464 and earlier have a type confusion vulnerability. Successful exploitation could lead to arbitrary code execution .
CVE-2019-7070
PUBLISHED: 2019-05-24
Adobe Acrobat and Reader versions 2019.010.20069 and earlier, 2019.010.20069 and earlier, 2017.011.30113 and earlier version, and 2015.006.30464 and earlier have an use after free vulnerability. Successful exploitation could lead to arbitrary code execution .
CVE-2019-7071
PUBLISHED: 2019-05-24
Adobe Acrobat and Reader versions 2019.010.20069 and earlier, 2019.010.20069 and earlier, 2017.011.30113 and earlier version, and 2015.006.30464 and earlier have an out-of-bounds read vulnerability. Successful exploitation could lead to information disclosure.
CVE-2019-7072
PUBLISHED: 2019-05-24
Adobe Acrobat and Reader versions 2019.010.20069 and earlier, 2019.010.20069 and earlier, 2017.011.30113 and earlier version, and 2015.006.30464 and earlier have an use after free vulnerability. Successful exploitation could lead to arbitrary code execution .