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Author Topic: What exactly do JS:Cryxos-O [Trj]?  (Read 2011 times)

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Offline TheOwner

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What exactly do JS:Cryxos-O [Trj]?
« on: August 18, 2023, 12:34:40 AM »
Hi, what exactly this malware do?

hXXps://zpb.bvdssej.tk/21006749.js [L] JS:Cryxos-O [Trj] (0)

Avast blocked it, so my PC is not infected?

Thank you.
« Last Edit: August 18, 2023, 12:46:46 AM by TheOwner »
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Offline DavidR

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Re: What exactly do JS:Cryxos-O [Trj]?
« Reply #1 on: August 18, 2023, 12:54:52 AM »
Correct, the Web Shield (presumably) is the shield that made the detection so it effectively blocks any download or running of the .js file
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Offline DavidR

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Re: What exactly do JS:Cryxos-O [Trj]?
« Reply #2 on: August 18, 2023, 01:09:14 AM »
Update - One hit on virustotal on the domain - https://www.virustotal.com/gui/url/63f6c1dd2c998318e7dafe995b0fd37b794071ac12398dab0a46b73a67e2d95e/detection

Some security related pointers on that site - https://en.internet.nl/site/zpb.bvdssej.tk/2275494/
Medium Security Risk reported here - https://sitecheck.sucuri.net/results/zpb.bvdssej.tk - with some hardening improvements mentioned.
Considered a Medium Security Risk here - https://quttera.com/detailed_report/zpb.bvdssej.tk

The DrWeb file scanner doesn't find anything (no guarantees though), see attached image.
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Offline TheOwner

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Re: What exactly do JS:Cryxos-O [Trj]?
« Reply #3 on: August 18, 2023, 01:15:54 AM »
Thank you for answer. So it looks it is not that dangerous.
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Offline DavidR

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Re: What exactly do JS:Cryxos-O [Trj]?
« Reply #4 on: August 18, 2023, 02:25:52 AM »
You're welcome.

A possibility of a false positive, but backed up by the Web Shield if it weren't an FP.
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Offline Pondus

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Re: What exactly do JS:Cryxos-O [Trj]?
« Reply #5 on: August 19, 2023, 10:55:47 AM »
Quote
Hi, what exactly this malware do?

F-secure info:
Cryxos trojans display an alarming notification message saying that the user's computer or web browser has been 'blocked' due to a virus infection, and that their personal details are 'being stolen'. The user is then directed to call a phone number for assistance in the 'removal process'. This is a version of a 'call support' scam.

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Offline polonus

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Re: What exactly do JS:Cryxos-O [Trj]?
« Reply #6 on: August 19, 2023, 12:04:34 PM »
ASN data for IP 104.21.34.80 show that this abuse was performed via a Cloudflare hosted domain.

Re: https://sitereport.netcraft.com/?url=http://zpb.bvdssej.tk  Netcraft risk:10 out of 10.

More malicious domains are being hosted via Cloudflare.  Take nothing for granted to-day.
And do not click links from mails that are/seem suspicious.

polonus
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