Hackers used SonicWall zero-day flaw to plant ransomware

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Ransomware group UNC2447 used an SQL injection bug to attack US and European orgs

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Security researchers have discovered a new strain of ransomware designed to exploit a SonicWall VPN zero-day vulnerability before a patch was available.

According to researchers at Mandiant, the flaw exists in SonicWall’s SMA-100 series of VPN products. Hackers, who Mandiant dubbed UNC2447, targeted organizations in Europe and North America with a new ransomware known as FiveHands, a rewritten version of the DeathRansom ransomware.

Hackers deployed the malware as early as January this year along with Sombrat malware at multiple victims that were extorted. Researchers noted that in one of the ransomware intrusions, the same Warprism and Beacon malware samples previously attributed to UNC2447 were observed. Researchers are certain that the same hacking group used Ragnar Locker ransomware in the past.

 
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“Based on technical and temporal observations of HelloKitty and FiveHands deployments, Mandiant suspects that HelloKitty may have been used by an overall affiliate program from May 2020 through December 2020, and FiveHands since approximately January 2021,” the researchers said.

Researchers said FiveHands is…

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