Finding an Agent Tesla malware sample
I was browsing through the Any Run sandbox looking through the public submissions of malware with pcaps of infection traffic from Tuesday 2019-11-26. I found this one, and it's tagged agenttesla. Agent Tesla is an information stealer. Based on the file name, this Agent Tesla malware sample may have been disguised as an installer for Discord.
Shown above: The Agent Tesla malware sample I found on Any.Run.
I retrieved the pcap from Any.Run's analysis of this malware sample, so I could review the traffic. Agent Tesla sends an email containing information from the victim's Window host. In many cases, email traffic generated by Agent Tesla is encrypted SMTP, but sometimes the post-infection SMTP traffic is unencrypted. Luckily, this example was unencrypted SMTP.
Shown above: Getting the pcap from analysis of the malware sample.
Shown above: Filtering on the pcap in Wireshark and finding the TCP stream to follow for the SMTP traffic (over TCP port 587).
Shown above: TCP stream showing unencrypte SMTP traffic caused by this sample of Agent Tesla.
As shown in the image above, this sample of Agent Tesla malware exfiltrated stolen data to the email address origin@gdrogroup.com. I've filtered out what would normally be sensitive data in the above image, so if you're curious, you can review the pcap (here's a link again for the analysis page) and discover for yourself.
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Brad Duncan
brad [at] malware-traffic-analysis.net
Comments
www
Nov 17th 2022
4 months ago
EEW
Nov 17th 2022
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qwq
Nov 17th 2022
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mashood
Nov 17th 2022
4 months ago
isc.sans.edu
Nov 23rd 2022
3 months ago
isc.sans.edu
Nov 23rd 2022
3 months ago
isc.sans.edu
Dec 3rd 2022
3 months ago
isc.sans.edu
Dec 3rd 2022
3 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
isc.sans.edu
Dec 26th 2022
2 months ago
isc.sans.edu
Dec 26th 2022
2 months ago