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Indicators are what attackers leave behind. Stolen credentials are what they arrive with.

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3 IOCs

XZ Backdoor: How to check if your systems are affected?

DCSO CyTec Blog
DCSO CyTec Blog
Published April 8, 2024Original Report

Excerpt

XZ Backdoor: How to check if your systems are affected A principal software engineer at Microsoft by the name of Andres Freund accidentally stumbled upon a backdoor within XZ, the popular compression library. This discovery happened because he noticed both a 500ms delay for ssh as well as the sshd processes using a surprising amount of CPU, despite immediately failing because of wrong usernames etc. He researched this and on March 29th, 2024 posted his findings on…

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Attack Flow7 steps · MITRE ATT&CK mapped

Initial AccessTA0001T1195
1/7
Supply Chain Compromise
ActionCompromise software repository
A malicious actor gradually gained trust and injected malicious code into the XZ Utils repository over two years.

Indicators of Compromise

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3 indicators

TypeIndicatorConfidenceScoreFirst Seen
CVECVE-2024-3094MediumScore 53/100First seen
MD5223949d5a074ebc3dce9ee78baad9e27MediumScore 53/100First seen
SHA1328c52da8a2bbb81307644efdb58db2c422d9ba7MediumScore 53/100First seen

IOC Relationship Graph

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