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BlackByte blends tried-and-true tradecraft with newly disclosed vulnerabilities to support ongoing attacks

Cisco Talos ()12 min read3 · 1 read
Analyze CVE-2024-37085 with Vani AIImpact, affected versions, exploitation, mitigations and detection

Vulnerabilities mentioned

All
CVEVulnerabilityCVSSEPSSSignalsPublished
CVE-2024-37085
Authentication Bypass in VMware ESXi via AD Group Recreation
7.227%KEVRansomware
KEV

Indicators of compromise

auto-extracted · verify before use · export allAll
TypeIndicatorContext
ipv41.1.1.1cution, the ransomware binary executed the command `/c ping 1.1.1[.]1 -n 10 > Nul & fsutil file setZeroData offset=0 length=503
ipv4204.79.197.219ded: Communication with msdl.microsoft[.]com via IP address 204.79.197[.]219 early in the execution process. This site is associated w
sha25601aa278b07b58dc46c84bd0b1b5c8e9ee4e62ea0bf7a695862444af32e87f1fdto prevent potential victim identification. RtCore64.sys – 01aa278b07b58dc46c84bd0b1b5c8e9ee4e62ea0bf7a695862444af32e87f1fd DBUtil_2_3.sys – 0296e2ce999e67c76352613a718e11516fe1b0efc3
sha2560296e2ce999e67c76352613a718e11516fe1b0efc3ffdb8918fc999dd76a73a50b1b5c8e9ee4e62ea0bf7a695862444af32e87f1fd DBUtil_2_3.sys – 0296e2ce999e67c76352613a718e11516fe1b0efc3ffdb8918fc999dd76a73a5 zamguard64.sys – 543991ca8d1c65113dff039b85ae3f9a87f503daec
sha25631f4cfb4c71da44120752721103a16512444c13c2ac2d857a7e6f13cb679b4273dff039b85ae3f9a87f503daec30f46929fd454bc57e5a91 gdrv.sys – 31f4cfb4c71da44120752721103a16512444c13c2ac2d857a7e6f13cb679b427
sha256543991ca8d1c65113dff039b85ae3f9a87f503daec30f46929fd454bc57e5a913a718e11516fe1b0efc3ffdb8918fc999dd76a73a5 zamguard64.sys – 543991ca8d1c65113dff039b85ae3f9a87f503daec30f46929fd454bc57e5a91 gdrv.sys – 31f4cfb4c71da44120752721103a16512444c13c2ac2d857

From the original article

12 min read at blog.talosintelligence.com

The BlackByte ransomware group continues to leverage tactics, techniques and procedures (TTPs) that have formed the foundation of its tradecraft since its inception, continuously iterating its use of vulnerable drivers to bypass security protections and deploying a self-propagating, wormable ransomware encryptor.

Cisco Talos

blog.talosintelligence.com

Read the full article at Cisco Talos

A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.