Threat Hunting Journal May 2022 Edition

Heimdal™ returns with the May edition of our threat hunting journal. As you might have expected, king trojan reigns unhindered with over 16,000 positive detections. There are a couple of newcomers, some of which may give our uncrowned monarch a run for his money. Stick around for more information and goodies. Enjoy!

Top Malware(s) Detections: 1st of May – 27^th of May

Throughout May, Heimdal™’s SOC team has detected 16 trojan variants, with a grand total of 16,738 positive detections – a 55.19% drop compared to April, when the historical high of 25,976 positive detections was recorded. Concerning distribution, we have 11 new newcomers and 20 backsliders. TR/Rozena/jrrvz raked the highest number of positive IDs (i.e., 2675), followed closely by TR/CoinMiner.uwtyu with 2316 positive IDs, and EXP/MS04-028.JPEG.A with 2280 hits. Here’s the full list of May detections.

Top 10 Malware Detailed

Let’s get around to covering those new detections.

TR/Trash.Gen

TR/Trash.Gen is trojan-type malware that’s usually contracted by visiting unsecured pornographic websites. Trash.Gen can install backdoors, ramp up CPU usage, and install adware.

TR/PSInject.G1

PSInject.G1 is PowerShell scrip-carrying trojan that accesses multiple comdlets such are new-object, out-null, test-path, where-object, write-output, and write-verbose.

VBS/Dldr.Agent.VPET

Dldr.Agent.VPET is a trojan downloader. It’s used to inject and execute malicious VBS scripts on the victim’s machine.

TR/AD.Swotter.lckuu

An adware-carrying trojan is used to collect host and network data from the infected machine.

ACAD/Burste.K

A ‘trojanized’ virus that affects ACAD .lsp files. Upon infection, the virus waits for user input in order to load the files.

TR/Dropper.Gen5

A trojan dropper used to install backdoors, deliver additional malware components or to eavesdrop on the victim.

WORM/Brontok.C

The .C variant of the Brontok worm. This malware’s distributed via email. Once inside the machine, it will create a new Windows Registry entry, disable regedit.exe, and modify several Windows Explorer settings.

W32/Sality.Y

The .Y variant of the Sality virus is used to install backdoors or connect the victim’s computer to a botnet.

ADWARE/JsPopunder.G

An adware-type malware. Can display malicious popups or ads on the affected machine.

Additional Cybersecurity Tips and Parting Thoughts

This concludes the May edition of Heimdal™ Security’s threat hunting journal. Before I go, I’m gonna share with you a couple of tips on how you can jog up your security.

• Scanning frequency. Don’t have any type of device-scanning policy in place? Well, now would be a good time to enforce one.
• Better AV protection. Some types of malware won’t show up on a regular AV scan. If so, I would encourage you to try out Heimdal™ Next-Gen AV & MDM, a solution than combines top-tier detection rates, brute-force detection & protection features, and more.
• Phishing. As you know, most malware’s transmitted via email. So, if it looks suspicious, it’s probably dangerous and should, therefore, not be opened.

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