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Hackers hijacked the eScan Antivirus update mechanism in malware campaign

Security Affairs

A malware campaign has been exploiting the updating mechanism of the eScan antivirus to distribute backdoors and cryptocurrency miners. Avast researchers discovered and analyzed a malware campaign that exploited the update mechanism of the eScan antivirus to distribute backdoors and crypto miners.

Antivirus 100
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Ad blocker with miner included

SecureList

Back then, cybercriminals distributed malware under the guise of the Malwarebytes antivirus installer. After substituting the DNS servers, the malware starts updating itself by running update.exe with the argument self-upgrade (“C:Program Files (x86)AdShieldupdater.exe” -self-upgrade). Distributed under the name adshield[.]pro,

DNS 141
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Calling Home, Get Your Callbacks Through RBI

Security Boulevard

Payload Ingress When delivering payloads to clients through RBI solutions, these solutions’ sandboxing and scanning capabilities present significant hurdles that must be overcome to achieve code execution in your target environment. Antivirus Inspection Not all RBI products will prioritize this time factor.

DNS 64
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StripedFly: Perennially flying under the radar

SecureList

It comes equipped with a built-in TOR network tunnel for communication with command servers, along with update and delivery functionality through trusted services such as GitLab, GitHub, and Bitbucket, all using custom encrypted archives. The action of these tasks is run of PowerShell loader script.

Malware 107
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WinDealer dealing on the side

SecureList

On January 27, we delivered a joint presentation with TeamT5 and ITOCHU Corporation at Japan Security Analyst Conference (JSAC) to provide an update on the actor’s latest activities. Layout of the encrypted data. Packets exchanged with the C2 server contain a header (described in the next table) followed by AES-encrypted data.

Malware 113
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In-depth analysis of the new Team9 malware family

Fox IT

Before proceeding to the technical analysis part, it is worth mentioning that the strings are not encrypted. Any received files from the command and control server are sent in an encrypted format. Both of these methods are also present in the latest Team9 backdoor variants. Similar payload decryption technique.

Malware 48
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How to Improve Email Security for Enterprises & Businesses

eSecurity Planet

We will present these options in two categories: a priority tier and an advanced capability tier. It can be time consuming to establish these protocols on an organization’s DNS servers, but doing so will provide two key benefits. Critical features provide the base requirements of email security.