CoolClient is a backdoor family attributed to the HoneyMyte APT group (also known as Mustang Panda) that has been used in their cyber-espionage campaigns targeting organizations across Asia and Russia. It supports such capabilities as keylogging, clipboard theft, credential harvesting, file management, system reconnaissance, and plugin-based extensions.
Since its first public disclosure by Sophos in 2022 and subsequent analysis by Trend Micro in 2023, CoolClient has continued to evolve. In 2025, we analyzed a newer variant that introduced clipboard theft and HTTP traffic interception for credential harvesting.
Read more…
Source: Kaspersky
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- Manic Menagerie 2.0: The Evolution of a Highly Motivated Threat Actor
June 28, 2023
Unit 42 researchers discovered an active campaign that targeted several web hosting and IT providers in the United States and European Union from late 2020 to late 2022. Unit 42 tracks the activity associated with this campaign as CL-CRI-0021 and believes it stems from the same threat actor responsible for the previous campaign known as ...
- Andariel’s silly mistakes and a new malware family
June 28, 2023
Andariel, a part of the notorious Lazarus group, is known for its use of the DTrack malware and Maui ransomware in mid-2022. During the same period, Andariel also actively exploited the Log4j vulnerability as reported by Talos and Ahnlab. Their campaign introduced several new malware families, such as YamaBot and MagicRat, but also updated versions ...
- Securing the AI Pipeline
June 27, 2023
Artificial intelligence (AI) is a hot topic these days, and for good reason. AI is a powerful tool. In fact, Mandiant analysts and responders are already using Bard in their workflows to identify threats faster, eliminate toil, and better scale talent and expertise. Organizations are keen to understand how best to integrate it into their ...
- CISA Releases SCuBA TRA and eVRF Guidance Documents
June 27, 2023
The Technical Reference Architecture (TRA) document, previously released for public comment on April 19, 2022, is the final version of a security guide that agencies can use to adopt technology for cloud deployment, adaptable solutions, secure architecture, and zero trust frameworks. The extensible Visibility Reference Framework (eVRF) guidebook provides an overview of the eVRF framework, which ...
- How cybercrime is impacting SMBs in 2023
June 27, 2023
According to the United Nations, small and medium-sized businesses (SMBs) constitute 90 percent of all companies and contribute 60 to 70 percent of all jobs in the world. They generate 50 percent of global gross domestic product and form the backbone of most countries’ economies. In the past, the perception was that large corporations were more ...
- Why endpoint management is key to securing an AI-powered future
June 26, 2023
The chief information security officer (CISO) agenda has a new set of priorities. Hybrid work and the resultant architecture updates, so prevalent at the beginning of the pandemic, are no longer top of mind. Instead, the thinking is focused on tackling ever more sophisticated threats and integrating Zero Trust in a more nuanced fashion through ...