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Forge Report: First Half Threat Trends of 2024
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Kaspersky Releases Decryptor for Yanluowang Ransomware
Kaspersky has released a free decryptor for Yanluowang ransomware after identifying a vulnerability in the malware. Yanluowang, first observed in August 2021, targets victims in the US, Brazil, Turkey, and other countries. The ransomware is used in targeted attacks and requires specific parameters to execute, indicating manual deployment or use of scripts in compromised systems.
Docker Targeted by LemonDuck
CrowdStrike intelligence reveals that the LemonDuck botnet is targeting Docker APIs to mine cryptocurrency. The attackers use proxy pools to hide wallet addresses and deploy XMRig through custom Docker ENTRYPOINT and disguised bash scripts. LemonDuck also terminates rival cryptominers and disables Alibaba's cloud monitoring service.
Lapsus$ Breached T-Mobile
Independent researcher Brian Krebs reveals that the data extortion group Lapsus$ breached T-Mobile in March 2022, stealing source code for various company projects. T-Mobile confirms the breach but states that no customer or government data was compromised. Lapsus$ used compromised systems and credentials from the Russian Market and insider access to conduct the attack. Although the hackers faced some resistance from T-Mobile employees, they managed to access the customer management tool Atlas but were thwarted in their attempts to access FBI and Department of Defense accounts.
FBI Warns of Ransomware Threat to Food and Agriculture Organizations
The FBI's latest alert warns that ransomware actors are likely to target agricultural cooperatives during planting and harvest seasons. Recent attacks against grain cooperatives and agricultural companies aim to disrupt operations, cause financial losses, and impact the supply chain. Initial attack vectors exploit common vulnerabilities, posing severe risks to the food and agriculture sectors.
Catching Up With Emotet
Fortinet has reviewed recent Emotet campaigns, noting a variety of attack techniques involving malicious documents. Since reemerging in November 2021, Emotet has been highly active, though activity tapered slightly after Microsoft disabled Excel 4.0 macros by default in January 2022. Analysis of five malicious document samples revealed the use of Excel or Word documents containing malicious VBA macros or Excel 4.0 macros to deliver Emotet. Execution typically involves wscript, PowerShell, or Mshta to download the Emotet payload, which is then executed with rundll32 or regsvr32.
Hive Ransomware Attack Analysis
The Varonis Forensics Team investigated a Hive ransomware attack, which executed in under 72 hours. Exploiting the Exchange Proxyshell vulnerability, attackers used PowerShell invoke-expression commands to download Cobalt Strike payloads, achieved persistence by creating new user accounts and dumping credentials with Mimikatz. They moved laterally using mstsc.exe, conducted network discovery with SoftPerfect, and saved data to a text file. In the final attack stages, the ransomware disabled volume shadow copies, stopped services, and cleaned Windows Security logs. Hive ransomware, first observed in June 2021, targets sectors like healthcare, nonprofits, and energy providers.
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