cryptomining Archives

Tech Optimizer

April 2, 2025

Over 1,500 PostgreSQL Servers Hit by Fileless Malware Attack

A malware campaign has compromised over 1,500 PostgreSQL servers using fileless techniques to deploy cryptomining payloads. The attack, linked to the threat actor group JINX-0126, exploits publicly exposed PostgreSQL instances with weak or default credentials. The attackers utilize advanced evasion tactics, including unique hashes for binaries and fileless execution of the miner payload, making detection difficult. They exploit PostgreSQL’s COPY ... FROM PROGRAM function to execute malicious payloads and perform system discovery commands. The malware includes a binary named “postmaster,” which mimics legitimate processes, and a secondary binary named “cpu_hu” for cryptomining operations. Nearly 90% of cloud environments host PostgreSQL databases, with about one-third being publicly exposed, providing easy entry points for attackers. Each wallet associated with the campaign had around 550 active mining workers, indicating the extensive scale of the attack. Organizations are advised to implement strong security configurations to protect their PostgreSQL instances.

Tech Optimizer

April 2, 2025

Ongoing cryptomining campaign hits over 1.5K PostgreSQL servers

Over 1,500 PostgreSQL instances exposed to the internet have been targeted by a cryptocurrency mining malware campaign called JINX-0126. Attackers exploit weak credentials to access PostgreSQL servers and use the "COPY ... FROM PROGRAM SQL" command for arbitrary command execution. They deploy a shell script to terminate existing cryptominers and deliver the pg_core binary. A Golang binary, disguised as the PostgreSQL multi-user database server, is then downloaded to establish persistence and escalate privileges, leading to the execution of the latest XMRig cryptominer variant. JINX-0126 employs advanced tactics, including unique hashes for binaries and fileless miner payload execution, to evade detection by cloud workload protection platforms.

Tech Optimizer

March 31, 2025

Fileless XMRig-C3 Cryptominer Targets PostgreSQL Servers

Wiz Threat Research has reported a new variant of a malicious campaign targeting misconfigured and publicly exposed PostgreSQL servers, attributed to the threat actor JINX-0126. This actor exploits vulnerable PostgreSQL instances with weak login credentials to gain unauthorized access and deploy XMRig-C3 cryptominers. The campaign has evolved to include advanced evasion techniques, such as using unique hashes for binaries and executing payloads in a fileless manner to avoid detection. The analysis indicates that the threat actor assigns unique mining workers to each victim, with three distinct wallets identified, suggesting over 1,500 affected victims. Nearly 90% of cloud environments host PostgreSQL instances, with about one-third publicly exposed. The threat actor scans for poorly configured services, exploiting default weak credentials to gain access and execute malicious payloads. Upon successful login, the actor performs reconnaissance and executes a dropper script to deploy an obfuscated Golang binary, which contains an encrypted configuration with critical system information. The malware establishes persistence by creating cron jobs and modifying access controls. The actor also creates high-privilege roles for continued access and weakens the default admin user. The analysis identified three wallets associated with the campaign, with each wallet having around 550 workers. The Wiz Dynamic Scanner can identify exposed PostgreSQL services, while the Wiz Runtime Sensor detects malicious activities associated with this threat. The report includes specific wallet addresses, a file hosting service, and file hashes related to the malware. Techniques used by the malware align with various MITRE ATT&CK® techniques, including credential access, defense evasion, and resource hijacking.

Tech Optimizer

February 18, 2025

Microsoft Defender vs. McAfee: Features, Pricing, Pros & Cons

eSecurity Planet maintains editorial independence and may earn revenue from partner links. Microsoft Defender, a free built-in antivirus for Windows, offers minimal configuration and supports Windows 10 and 11, while McAfee, which holds a 12.47% share of the global antivirus market, provides extensive privacy monitoring and data protection across multiple platforms (Windows, Mac, Android, iOS) with various pricing plans ranging from .99 to 9.99. Microsoft Defender supports a single device and includes features like real-time threat protection, parental controls, and a firewall, but lacks advanced features like VPN and identity theft monitoring. McAfee offers a wider range of features, including a VPN, identity theft monitoring, and data cleanup, making it a more comprehensive solution despite its higher cost. Microsoft Defender has an overall rating of 3.8/5, while McAfee rates 4.4/5, excelling in customer support with multiple channels, including live chat and phone support. Microsoft Defender is suitable for users on a budget, while McAfee is better for those needing robust privacy and identity protection. Alternatives to consider include Norton, Bitdefender, and Malwarebytes.

Tech Optimizer

October 23, 2024

New Trojan.AutoIt.1443 Hits 28,000 Users via Game Cheats, Office Tool

Cybersecurity experts from Dr.Web have discovered a cyber attack involving Trojan.AutoIt.1443, targeting approximately 28,000 users primarily in Russia and neighboring countries. The malware disguises itself as legitimate applications and is spread through deceptive links on platforms like GitHub and YouTube, leading to password-protected downloads that evade antivirus detection. Key components of the malware include UnRar.exe and scripts named Iun.bat and Uun.bat, which facilitate its installation while erasing traces of activity. The malware scans for debugging tools, establishes network access via Ncat, and manipulates the system registry to maintain persistence. Its operations include cryptomining using SilentCryptoMiner and cryptostealing through a clipper tool that swaps cryptocurrency wallet addresses. The campaign has affected users drawn to pirated software, highlighting the risks of downloading from unverified sources.