2、PoisonTap技术可向锁定PC安装后门
标题:Wickedly Clever USB Stick Installs a Backdoor on Locked PCs
作者信息:11.16.16 7:00 AM By ANDY GREENBERG
//BEGIN
YOU PROBABLY KNOW by now that plugging a random USB into your PC is the digital equivalent of swallowing a pill handed to you by a stranger on the New York subway. But serial hacker Samy Kamkar‘s latest invention may make you think of your computer’s USB ports themselves as unpatchable vulnerabilities—ones that open your network to any hacker who can get momentary access to them, even when your computer is locked.
Today Kamkar released the schematics and code for a proof-of-concept device he calls PoisonTap: a tiny USB dongle that, whether plugged into a locked or unlocked PC, installs a set of web-based backdoors that in many cases allow an attacker to gain access to the victim’s online accounts, corporate intranet sites, or even their router. Instead of exploiting any glaring security flaw in a single piece of software, PoisonTap pulls off its attack through a series of more subtle design issues that are present in virtually every operating system and web browser, making the attack that much harder to protect against.
“In a lot of corporate offices, it’s pretty easy: You walk around, find a computer, plug in PoisonTap for a minute, and then unplug it,” Kamkar says. The computer may be locked, he says, but PoisonTap “is still able to take over network traffic and plant the backdoor.”
现在基本上每个人都知道不能随便使用来路不明的U盘,但是目前黑客们更进一步发现了一种新的攻击方法:只要给他们一次物理接触计算机的机会,他们就会将其特制的U盘插入目标计算机,同时植入特制木马。其亮点在于即使您的计算机处于锁定状态也不能幸免。
黑客已经公开了其PoC概率验证型代码,供任何知道的人下载,并起了一个名字PoisonTap.有个这个U盘的帮助,只要黑客有机会接近目标,他就能悄悄植入后门(非文件驻留型),这样黑客就能远程登录用户的账户,甚至企业内网和路由器。由于是与浏览器的缓冲Cache相关,因此属于比较新颖的技术,同时检测也相对困难。
//END
For the time being Kamkar says there’s no easy fix for users. To avoid an attack, he suggests someone would need to set their computer to hibernate rather than sleep, a setting that suspends all processes on the computer and causes it to wake up far more slowly. Or they can close their browser every time they step away from their computer, assiduously clear its cache, or even take the more drastic measure of filling their USB ports with glue. “I personally haven’t found a good, convenient way to solve this on my own computer,” Kamkar says.
The clearest and most troubling lesson, perhaps, is to beware who gets physical access to your PC. With a tool like PoisonTap in hand, a hacker walking unattended around your office may soon be moving freely around your corporate network, too.
根据开发该USB设备黑客介绍:对用户来说,目前还很难开发修复程序。为了预防类似的攻击,只能采用防护措施。建议人们在不使用机器的时候,将机器直接关闭或者采用休眠模式。另外就是实在不想这样做的话,也得每次离开计算机时,将您的浏览器关闭、清除浏览器的缓存甚至直接将USB接口封住。因为不这样做的话,一旦有这类黑客在您机器周围走一圈,借助这个工具,然后他就能进入您的企业内网了。
相关网址(技术验证型)
https://samy.pl/poisontap/
https://github.com/samyk/poisontap
//下载:
poisontap-master.part1.rar
(6.05 MB, 下载次数: 265)
poisontap-master.part2.rar
(5.28 MB, 下载次数: 314)
文件名:poisontap-master.zip
文件大小:12,766,753 bytes
MD5 : 3214AE89132584015FD98D7F9BBEC634
点评:互联网安全和传统安全还得相结合。 |