Imperva Detects and Mitigates Rejetto HFS Spray-and-Pray Ransomware/Trojan Campaign

On July 19th, Imperva Threat Research team detected a sudden surge in HTTP probes targeting Rejetto HTTP File Server HFS 2.x instances. What looked like routine internet noise quickly revealed itself as a coordinated attempt to exploit a critical unauthenticated server-side template injection...

Update: CVE-2024-4577 quickly weaponized to distribute “TellYouThePass” Ransomware

Introduction Recently, Imperva Threat Research reported on attacker activity leveraging the new PHP vulnerability, CVE-2024-4577. From as early as June 8th, we have detected attacker activity leveraging this vulnerability to deliver malware, which we have now identified to be a part of the...

Imperva uncovers new Indicators of Compromise for FBI and CISA-flagged AndroxGh0st botnet

On January 16, a joint alert from FBI and CISA warned about a concerning development: the emergence of a botnet driven by AndroxGh0st malware targeting vulnerable applications and web servers. AndroxGh0st is a Python-based malware, first seen in late 2022, designed to target Laravel .env files an...

Python’s Poisoned Package: Another ‘Blank Grabber’ Malware in PyPI

Python Package Index PyPI is a platform that offers an extensive range of packages to simplify and enhance the development process. Malicious actors regularly upload phishing packages in the platform’s repository aimed at delivering malware to steal the victims information, or more frequently, to...

Exploit for CVE-2023-22524

Atlassian Companion RCE Vulnerability Proof of Concept CVE-20...

Abusing JSON-Based SQL

Overview Modern databases, such as PostgreSQL, natively support JSON as data values that can be queried. This capability uses JSON-specific operators, including an operator to test for key presence. Imperva Threat Research has investigated these database native JSON operators and discovered...

Log4j: One Year Later

One year ago, the Log4j remote code execution vulnerability known as Log4Shell CVE-2021-44228 was announced. The critical severity level vulnerability in a logging framework used across virtually all Java environments quickly set the internet on fire when it was released and exploited. It’s...

The Global DDoS Threat Landscape – September 2022

Every month in this space, we will post the State of the Global DDoS Threat Landscape blog on behalf of the Imperva Threat Research team. As DDoS attacks become more frequent, varied, and sophisticated, it is critical that we regularly communicate the Imperva Threat Research team’s findings and...

Bots Hide Behind User Privacy – Should You Be Concerned?

Bot operators are perpetually devising innovative techniques to sneak past security as they go about their dubious, often downright illegal business. Emulating human behavior and traffic patterns are key elements of their strategy. One of the many layers comprising this strategy is reporting thei...

Hacktivists Expanding DDoS Attacks as Part of International Cyber Warfare Strategy

In April 2022 it was reported that pro-Russian hacktivist group, KILLNET, carried out a series of Distributed Denial of Service DDoS attacks against a number of websites including the United Nations UN, The Organization for Security and Cooperation OSCE an organization founded in Finland, and oth...

Evasive Bots Drive Online Fraud – 2022 Imperva Bad Bot Report

The 2022 Imperva Bad Bot Report is now available. The report is the ninth annual in-depth analysis of bot traffic, created with data collected from Impervas global network throughout the past year by the Imperva Threat Research Team. Bad bots are software applications that run automated tasks wit...