Friday, December 1, 2023

Valak Malware Attacks Microsoft Exchange Servers to Steal Enterprise Passwords

Valak Malware malware first observed in the year 2019, the malware is not only a loader it can be used as an information stealer to target individuals and enterprises.

Researchers observed a new Valak malware campaign that particularly targets the US and Germany. In the new campaign, it was developed as a sophisticated, multi-stage modular from the loader.

Valak Malware Campaign

According to Cybereason researchers, the new campaign the common infection vector is the Microsoft Word documents embedded with malicious macro code.

The document found to be created in both English and German language and distributed depending on the geolocation of the target.

Valak Malware

The weaponized word document contains malicious macro code that downloads other stages of the payload. The initial stage of the malware is a fileless stage that stores various components in the registry.

In the reconnaissance phase, it collects the following data from the infected hosts such as; user, machine, and network information from infected hosts, also it checks for geolocation of the victim’s machine.

The malware also takes screenshots of the infected machine and also download plugins and other malware like Ursnif or IcedID to handle other operations.

The new version of the malware attacker expands it with several plugin components for reconnaissance and information stealing.

Threats updated the Valak as most stealthy malware that uses advanced techniques like ADS and hiding components in the registry.

The malware mainly targets administrators and enterprises network, it collects and steals sensitive information from the Microsoft Exchange mail system, including credentials and the domain certificate

Researchers observed that malware is using shared infrastructure among almost all of its different versions.

Valak Malware

“Given the fact that both Ursnif and IcedID are considered to be part of the Russian-speaking E-Crime ecosystem, it is possible that the authors of Valak are also part of that Russian-speaking underground community.”

The Valak malware with it’s extended capabilities suggest that it can be used independently with or without teaming up with other malware.

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