ModernLoader bot, aka Avatar bot, is a .NET remote access trojan with the capabilities to download and run files from the C&C server, harvest system information, and run arbitrary instructions. With the remote control provided by the malware, threat actors use the breached network for botnet propagation.
The chain of evidence suggests that these attacks can be attributed to a new group of russian-speaking cyber criminals targeting users in Poland, Hungary, Bulgaria, and russia. Adversaries compromise vulnerabilities in WordPress and CPanel, luring users into downloading malicious implants disguised as Amazon gift certificates.
This detection has translations for the following SIEM, EDR & XDR platforms: Microsoft Sentinel, Elastic Stack, Splunk, Humio, Sumo Logic, ArcSight, QRadar, FireEye, LogPoint, Graylog, Regex Grep, Microsoft PowerShell, RSA NetWitness, Chronicle Security, Devo, LimaCharlie, Snowflake, Microsoft Defender ATP, CrowdStrike, Apache Kafka ksqlDB, AWS OpenSearch, Carbon Black, Securonix, and Open Distro.
The rule is aligned with the MITRE ATT&CK® framework v.10, addressing the Execution tactic with Scheduled Task/Job (T1053) as the primary technique.
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Cisco Talos research team detected a tidal wave of malware distribution within the March to June 2022 timeframe. Based on observed attacks and news reports, it is possible to single out three malware distribution campaigns, spreading ModernLoader RAT, RedLine information stealer malware, and cryptocurrency miners. The attackers leverage PowerShell, .NET assemblies, and HTA and VBS files to move laterally across the compromised networks, dropping additional malicious payloads. These attacks expose global organizations in various industry sectors to severe risks.
The threat actor behind the listed campaigns is using off-the-shelf tools; researchers take it as an indicator of the criminal actor’s lack of technical skills required to design their own tooling.
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