Ukrainian telecommunications operators hit by DarkCrystal RAT malware

Pierluigi Paganini June 27, 2022

The Ukrainian CERT-UA warns of attacks against Ukrainian telecommunications operators involving the DarkCrystal RAT.

The Governmental Computer Emergency Response Team of Ukraine (CERT-UA) is warning of a malware campaign targeting Ukrainian telecommunications operators with the DarkCrystal RAT.

The malspam messages have the topic “Free primary legal aid” use a password-protected attachment “Algorithm of actions of members of the family of a missing serviceman LegalAid.rar.”

The RAR archive analyzed by the Ukrainian CERT-UA contains the document “Algorithm_LegalAid.xlsm.” Upon opening the document and enabling the macro, a PowerShell command will be executed. The script will download and run the .NET bootloader “MSCommondll.exe,” which in turn will download and run the malware DarkCrystal RAT.

“Based on the email addresses of e-mail recipients, as well as the domain management DarkCrystal RAT, we assume that the attack is aimed at operators and telecommunications providers of Ukraine. During the previous attack, on June 10, 2022, media organizations of Ukraine ( CERT-UA # 4797 ) were the objects of interest of malefactors.” states the alert published by CERT-UA.

DarkCrystal RAT

The report also includes indicators of compromise for this threat.

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Pierluigi Paganini

(SecurityAffairs – hacking, RAT)

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