Top 10 Malware December 2022

guest · Jan 20, 2023

January 20, 2023

In December 2022, the Top 10 Malware list remained consistent with November’s list except for the addition of three malware. This month, NanoCore, Snugy, and Tinba returned to the Top 10 Malware list. Additionally, SessionManager2 became the new top malware for the month.

NanoCore is a remote access trojan (RAT) spread via malspam with an attachment, such as a malicious Excel XLS spreadsheet. NanoCore accepts commands to download and execute files, visit websites, and add registry keys for persistence.

Snugy is a PowerShell-based backdoor that obtains the system’s hostname and runs other commands. The backdoor communicates through a DNS tunneling channel on the compromised server.

Tinba (aka Tiny Banker) is a banking trojan that's known for its small file size. Tinba uses web injection to collect victim information from login pages and web forms. It is primarily disseminated via exploit kits.

SessionManager2 is a malicious Internet Information Services (IIS) module or backdoor that enables cyber threat actors (CTAs) to maintain persistent, update-resistant, and relatively stealthy access to a victim’s infrastructure.

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The Top 10 Malware variants comprised 54% of the total malware activity in December 2022, staying consistent with the previous month.

In December 2022, Dropped was the top initial infection vector due to SessionManager2 and Gh0st activity. Activity levels for Dropped and Malspam increased, while the activity level for Multiple decreased. It is likely that Dropped will remain the primary infection vector in the coming months if SessionManager2 activity continues.
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Malspam consistently represents a portion of the Top 10 Malware, as it is one of the oldest and most reliable initial infection vectors used by CTAs.
Top 10 Malware and IOCs
Below are the Top 10 Malware ranked in order of prevalence.
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Top 10 Malware December 2022

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Top 10 Malware December 2022

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