Scammers Leveraging Microsoft Group GIFs in Phishing Assaults

Cybersecurity guide Bobby Rauch has found a brand new assault tactic through which risk actors exploit Microsoft Groups vulnerabilities. In line with Rauch, attackers can simply leverage Microsoft Groups GIFs via these vulnerabilities to launch phishing, command execution, and knowledge filtration schemes.

What’s GIFShell?

Rauch has named the newly found assault approach involving MS Groups GIFs as GIFShell. The approach permits attackers to create a reverse shell to facilitate malicious command supply through base64-encoded GIFs in MS Groups.

Utilizing a malicious stager executable, the attackers can set up their devoted MS Groups tenant and begin the assault utilizing the GIFShell Python script.

GIFShell installs malware on the gadget and may sneakily extract knowledge beneath the guise of innocent GIF photographs. Rauch famous that the assault entails the exploitation of a number of vulnerabilities in MS Groups to create a sequence of command executions.

Moreover, attackers solely have to infiltrate MS Groups and any of the GIFs. Using Microsoft’s internet infrastructure, they’ll unpack instructions and set up them instantly on computer systems.

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Microsoft’s Response

In a weblog publish, Rauch said that he notified Microsoft in Might 2022. Nevertheless, Microsoft claims that instantly releasing fixes for the assault is not possible. Furthermore, the tech big said that the assault strategies “reported” by Rauch don’t meet the requisites for growing an pressing safety repair.

“We’re always taking a look at new methods to higher resist phishing to assist guarantee buyer safety and should take motion in a future launch to assist mitigate this system.”

Microsoft

Due to this fact, the most effective line of protection for you is to not open any GIFs shared by somebody on MS Groups.

Extra Information

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