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Home Alerts

Migo Malware Targeting Redis Servers

February 21, 2024
Reading Time: 3 mins read
in Alerts

A novel malware campaign, named Migo, has emerged with a primary objective of exploiting Redis servers to facilitate cryptocurrency mining on compromised Linux systems. Spearheaded by Cado security researcher Matt Muir, the campaign employs a suite of innovative techniques designed to weaken system defenses and establish persistence on targeted machines. Migo, a Golang ELF binary, boasts compile-time obfuscation and the ability to disable critical configuration options on Redis servers, thereby facilitating future exploitation without raising suspicion.

The attack begins with the exploitation of Redis servers through the disabling of security measures such as protected-mode and replica-read-only, allowing threat actors to issue commands from external networks unnoticed. Subsequently, the attackers create two Redis keys, one pointing to an SSH key under their control and the other to a cron job fetching the primary payload from a file transfer service. The malware downloader is concealed within a Pastebin file, fetched using curl or wget commands, further enhancing its stealth capabilities.

Migo’s complexity extends beyond mere exploitation, as it demonstrates the capability to resist reverse engineering and acts as a downloader for an XMRig installer hosted on GitHub. Moreover, the malware initiates steps to establish persistence, terminate competing miners, and launch the mining process. In addition to targeting Redis servers, Migo disables SELinux and seeks uninstallation scripts for monitoring agents, while deploying a modified version of the libprocesshider rootkit to conceal its activities. These actions align with tactics utilized by known cryptojacking groups, indicating the evolution of cloud-focused cyber threats and the need for enhanced security measures to combat them effectively.

Despite its sophisticated nature, Migo’s motives remain somewhat ambiguous, with theories suggesting either an attempt to confuse analysis tools or a search for environment-specific artifacts. Nonetheless, the campaign underscores the increasing refinement of attackers’ techniques in exploiting web-facing services. As Muir points out, the incorporation of features such as hiding on-disk artifacts alongside malicious processes demonstrates the evolving sophistication of cloud-focused cyber threats, highlighting the critical importance of proactive cybersecurity measures.

Reference:
  • Migo – a Redis Miner with Novel System Weakening Techniques
Tags: CryptocurrenciesCryptominingCyber AlertCyber Alerts 2024Cyber RiskCyber threatCybersecurityFebruary 2024LinuxMalwareMigoRedis
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