Fake attachment. Roundcube mail server attacks exploit CVE-2024-37383 vulnerability.


In September 2024, threat intelligence experts from the Positive Technologies Security Expert Center (PT ESC) discovered an email sent to a governmental organization belonging to a CIS country. Timestamps indicate that the email was sent back in June 2024. The email appeared to be a message without text, containing only an attached document.

However, the email client didn’t show the attachment. The body of the email contained distinctive tags with the statement eval(atob(…)), which decode and execute JavaScript code:

Read more…
Source: Positive Technologies


Sign up for our Newsletter


Related:

  • More than a Dozen Obfuscated APT33 Botnets Used for Extreme Narrow Targeting

    December 12, 2019

    The threat group regularly referred to as APT33 is known to target the oil and aviation industries aggressively. This threat group has been reported on consistently for years, but our recent findings show that the group has been using about a dozen live Command and Control (C&C) servers for extremely narrow targeting. The group puts up multiple layers of obfuscation to ...

  • DeCypherIT – All eggs in one basket

    December 12, 2019

    These days, attackers use cheap and publicly accessible services to help them bypass Anti-Virus protections and gain a foothold in their victims’ systems. We give a behind the scenes look at a service called CypherIt, which is sold publicly as a legitimate service but is used to wrap malwares and hide their malicious content. This evasion technique ...

  • Zeppelin: Russian Ransomware Targets High Profile Users in the U.S. and Europe

    December 11, 2019

    Zeppelin is the newest member of the Delphi-based Ransomware-as-a-Service (RaaS) family initially known as Vega or VegaLocker. Although it’s clearly based on the same code and shares most of its features with its predecessors, the campaign that it’s been part of differs significantly from campaigns involving the previous versions of this malware. Vega samples were first ...

  • The quiet evolution of phishing

    December 11, 2019

    The battle against phishing is a silent one: every day, Office 365 Advanced Threat Protection detects millions of distinct malicious URLs and email attachments. Every year, billions of phishing emails don’t ever reach mailboxes—real-world attacks foiled in real-time. Heuristics, detonation, and machine learning, enriched by signals from Microsoft Threat Protection services, provide dynamic, robust protection against email threats. Phishers have been ...

  • Story of the year 2019: Cities under ransomware siege

    December 11, 2019

    Overall awareness of the need for security measures is growing, and cybercriminals are increasing the precision of their targeting to locate victims with security breaches in their defense systems. Looking back at the past three years, the share of users targeted with ransomware in the overall number of malware detections has risen from 2.8% to 3.5%. While ...

  • Waterbear is Back, Uses API Hooking to Evade Security Product Detection

    December 11, 2019

    Waterbear, which has been around for several years, is a campaign that uses modular malware capable of including additional functions remotely. It is associated with the cyberespionage group BlackTech, which mainly targets technology companies and government agencies in East Asia (specifically Taiwan, and in some instances, Japan and Hong Kong) and is responsible for some infamous campaigns ...