[AusNOG] Critical 3CX Windows/Mac hack.

[Nathan Brookfield]

To be fair, they likely don’t know much yet and things are probably pretty hectic…. Give them time, crisis management is probably only kicking in now.

From: AusNOG <ausnog-bounces at lists.ausnog.net> On Behalf Of Christopher Hawker
Sent: Thursday, March 30, 2023 3:31 PM
To: Greg Lipschitz <glipschitz at summitinternet.com.au>; Rob Thomas <xrobau at gmail.com>; <ausnog at lists.ausnog.net> <ausnog at lists.ausnog.net>
Subject: Re: [AusNOG] Critical 3CX Windows/Mac hack.

It appears their sales team have no info regarding this. Just rang our Senior AM at 3CX and they've advised that they have no information, and that they are referring anyone who calls to their technical teams via support tickets in the 3CX portal.

Not a good look for them.

CH

Get Outlook for Android<https://aka.ms/AAb9ysg>
________________________________
From: AusNOG <ausnog-bounces at lists.ausnog.net<mailto:ausnog-bounces at lists.ausnog.net>> on behalf of Greg Lipschitz <glipschitz at summitinternet.com.au<mailto:glipschitz at summitinternet.com.au>>
Sent: Thursday, March 30, 2023 3:09:45 PM
To: Rob Thomas <xrobau at gmail.com<mailto:xrobau at gmail.com>>; <ausnog at lists.ausnog.net<mailto:ausnog at lists.ausnog.net>> <ausnog at lists.ausnog.net<mailto:ausnog at lists.ausnog.net>>
Subject: Re: [AusNOG] Critical 3CX Windows/Mac hack.

Here is a list of commands (or make a shell script) to stop it phoning home and getting more payload.

# Disable 3CX Unattended-Upgrades Service
systemctl stop unattended-upgrades

# Collect the version of 3CX Desktop Apps on the Server

cd /var/lib/3cxpbx/Instance1/Data/Http/electron
ls -la * > /root/3cx-desktop-versions.log

# Remove the files

rm -rf /var/lib/3cxpbx/Instance1/Data/Http/electron/osx/*.dmg
rm -rf /var/lib/3cxpbx/Instance1/Data/Http/electron/osx/*.zip
rm -rf /var/lib/3cxpbx/Instance1/Data/Http/electron/windows/*.msi
rm -rf /var/lib/3cxpbx/Instance1/Data/Http/electron/windows/*.nupkg


https://www.3cx.com/community/threads/threat-alerts-from-sentinelone-for-desktop-update-initiated-from-desktop-client.119806/page-5


Sadly, 3CX haven't even acknowledged this yet.
It would seem that their whole CI-CD pipeline has been compromised

Greg.


Greg Lipschitz​
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Founder & CEO
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Summit Internet
glipschitz at summitinternet.com.au<mailto:glipschitz at summitinternet.com.au>
summitinternet.com.au<http://summitinternet.com.au>
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________________________________
From: AusNOG <ausnog-bounces at lists.ausnog.net<mailto:ausnog-bounces at lists.ausnog.net>> on behalf of Rob Thomas <xrobau at gmail.com<mailto:xrobau at gmail.com>>
Sent: 30 March 2023 14:54
To: <ausnog at lists.ausnog.net<mailto:ausnog at lists.ausnog.net>> <ausnog at lists.ausnog.net<mailto:ausnog at lists.ausnog.net>>
Subject: [AusNOG] Critical 3CX Windows/Mac hack.

As no-one's mentioned it here yet, I just thought I'd bring up the zero-day, in the wild, active RIGHT NOW, trojan 3CX Windows and Mac apps.

If you, or you have clients, running 3CX, make sure they ARE NOT using the app. If they are, their machines are probably already owned, and all their stored credentials and session cookies have been leaked.

https://www.bleepingcomputer.com/news/security/hackers-compromise-3cx-desktop-app-in-a-supply-chain-attack/amp/<https://aus01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.bleepingcomputer.com%2Fnews%2Fsecurity%2Fhackers-compromise-3cx-desktop-app-in-a-supply-chain-attack%2Famp%2F&data=05%7C01%7Cglipschitz%40summitinternet.com.au%7C5134fed0ee3f4dbc894808db30d2a12f%7C0838a12f226e43dfa6e4bb63d2643a7e%7C0%7C0%7C638157453430051909%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=UvNTww7E05nvQnaDQ25Qc8XytZFC%2FhIseT3MHYckCNM%3D&reserved=0>

This is really bad. Sorry 8-(

--Rob

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