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Sophisticated OS X Backdoor Discovered

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Re: Sophisticated OS X Backdoor Discovered

#81

Earlier quoted context omitted.

I think that myth got shot down years ago. Along with magical and courageous marketing terms.

They still say it! On a page on their website in 2016. And their paid AstroTurfers are here on hn, with the downvotes.

Apple doesn't have paid astroturfers.

Re: Sophisticated OS X Backdoor Discovered

#82

Earlier quoted context omitted.

I agree, the terminology Kaspersky Labs is using is incorrect and misleading. The further poster is right that this should be labeled as "rootkit."

No, Kaspersky Labs is using correct terminology. Some rootkits install a backdoor. Not all rootkits install a backdoor -- some merely conceal themselves and operate locally. The famous Sony Rootkit is one such example of a rootkit which did not add a backdoor. The defining characteristic of a rootkit is that it conceals its presence from the rest of the system. Backdoor.OSX.Mokes.a doesn't really do this -- it's only…

Calling it a backdoor may be correct, but calling it an "OS X backdoor", particularly with no other context in the title, is not. It's merely clickbait.

Re: Sophisticated OS X Backdoor Discovered

#83
post #56

Earlier quoted context omitted.

No, Kaspersky Labs is using correct terminology. Some rootkits install a backdoor. Not all rootkits install a backdoor -- some merely conceal themselves and operate locally. The famous Sony Rootkit is one such example of a rootkit which did not add a backdoor. The defining characteristic of a rootkit is that it conceals its presence from the rest of the system. Backdoor.OSX.Mokes.a doesn't really do this -- it's only…

rootkit comes from unix, it was a tool helping to restore admin privileges even after the admin found that the host was hacked (that's where the name comes from root = admin on unix). Its goal was to be invisible. The sony rootkit was named somewhat incorrectly, because it also tried to hide itself and no other existing malware names fit it.

rootkit comes from unix, it was a tool helping to restore admin privileges even after the admin found that the host was hacked (that's where the name comes from root = admin on unix). Its goal was to be invisible.

Are you sure? It also commonly referred to such kits being used by hostile parties. I've personally interrupted an attempt at installing the "Hungarian Rootkit" in the 90's. (I put unpatched Red Hat 6 online when Red Hat 7 was out.)

(that's where the name comes from root = admin on unix)

The fact that you think this is something that bears explaining is interesting in the context of HN. I hope this is based on something you've noticed about recent user trends here. There was a time when someone would be very surprised if a user here didn't already know this.

Re: Sophisticated OS X Backdoor Discovered

#86

I like how the images all jump a centimeter to the left on mouseover! Makes the page feel exciting.

An extension or something you're using is causing that. Mouseover should show social media icon links on the left side of the pictures.

Oh, it does that, too.

Re: Sophisticated OS X Backdoor Discovered

#88

Really interesting to see a cross-platform malware with audio and video support; a lot of non-malware has difficulty with that.

Qt makes that easy, thats why they are using it.

Me thinks it would be nice to scan for Qt at the `exec()` level. I don't have a huge use for Qt, it would be nice to have to white list apps that use it.

Re: Sophisticated OS X Backdoor Discovered

#89

I feel the use of 'backdoor' here is misleading. The software described would usually be classified as an Advanced Persistent Threat [1] or Rootkit [2] Backdoor [3] usually refers to methods to sidestep authentication added by the vendor. 1: https://en.wikipedia.org/wiki/Advanced_persistent_threat 2: https://en.wikipedia.org/wiki/Rootkit 3: https://en.wikipedia.org/wiki/Backdoor_(computing)

I've heard the term "backdoor" used for a long time before "rootkit" or "advanced persistent threat", so it may be a generational thing.

From https://en.wikipedia.org/wiki/Rootkit:

> The modified compiler would detect attempts to compile the Unix login command and generate altered code that would accept not only the user's correct password, but an additional "backdoor" password known to the attacker...This exploit was equivalent to a rootkit.

From https://en.wikipedia.org/wiki/Advanced_persistent_threat:

> Establish Foothold – plant remote administration software in victim's network, create net backdoors and tunnels allowing stealth access to its infrastructure.

From https://en.wikipedia.org/wiki/Backdoor_(computing):

> A backdoor is a method, often secret, of bypassing normal authentication in a product, computer system, cryptosystem or algorithm etc. Backdoors are often used for securing unauthorized remote access to a computer, or obtaining access to plaintext in cryptographic systems.

I read all of that as a backdoor being an umbrella term, of which one type is a rootkit, and APTs create backdoors, perhaps of a type other than rootkit (e.g. net backdoor).

Re: Sophisticated OS X Backdoor Discovered

#90
post #2

Are video captures actually possible? I could imagine video capture as part of a RAT, but what scares me is the idea of video capture that doesn't turn on the camera activity light. Are there any examples of that?

The article only includes the word "Video" once in the summary, but then mentioned screen captures every 30 seconds. I'm guessing that is what the summary is referring to when it says "video capture", because there is no other reference to video or camera.

The list of source files include avfsession.mm which is likely a C++ wrapper around AVCaptureSession[0], Cocoa's audio and video capture class.

[0]https://developer.apple.com/library/ios/documentation/AVFoun...

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