In June 2024, Kaspersky discovered a macOS version of the HZ Rat backdoor targeting users of the enterprise messenger DingTalk and the social network and messaging platform WeChat.
The samples Kaspersky found almost exactly replicate the functionality of the Windows version of the backdoor and differ only in the payload, which is received in the form of shell scripts from the attackers’ server. The researchers noticed that some versions of the backdoor use local IP addresses to connect to C2, which led us to believe the threat may be targeted. This also points to an intention to exploit the backdoor for lateral movement through the victim’s network.
Read more…
Source: Kaspersky
Related:
- German police add Black Basta boss to EU most-wanted list
January 16, 2026
German cops have added Russian national Oleg Evgenievich Nefekov to their list of most-wanted criminals for his services to ransomware. Nefekov, 35, is accused of spearheading the Black Basta ransomware operation, which suffered a similar fate as Conti last year – ceasing activity after a major internal leak. His name and face also now appear ...
- Cisco has finally patched a maximum-level security issue
January 16, 2026
A maximum-severity vulnerability in certain Cisco products has finally been addressed after allegedly being exploited by Chinese hackers for several weeks. In mid-December 2025, the networking giant disclosed a remote code execution (RCE) vulnerability in AsyncOS that affects Secure Email Gateway (SEG) and Secure Email and Web Manager (SEWM) appliances. It tracked the flaw as CVE-2025-20393 ...
- “Reprompt” attack lets attackers steal data from Microsoft Copilot
January 15, 2026
Researchers found a method to steal data which bypasses Microsoft Copilot’s built-in safety mechanisms. The attack flow, called Reprompt, abuses how Microsoft Copilot handled URL parameters in order to hijack a user’s existing Copilot Personal session. Copilot is an AI assistant which connects to a personal account and is integrated into Windows, the Edge browser, and ...
- DeadLock Ransomware: Smart Contracts for Malicious Purposes
January 15, 2026
DeadLock is a ransomware family discovered in July 2025. It is notable for not being associated with any known affiliate programs and for lacking a Data Leak Site (DLS). This, combined with the limited number of reported victims, has resulted in low exposure for the group. However, Group-IB specialists have discovered an interesting use of ...
- Microsoft disrupts global cybercrime subscription service responsible for millions in fraud losses
January 14, 2026
Today, Microsoft is announcing a coordinated legal action in the United States and, for the first time, the United Kingdom to disrupt RedVDS, a global cybercrime subscription service fueling millions in fraud losses. These efforts are part of a broader joint operation with international law enforcement, including German authorities and Europol, which has allowed Microsoft and ...
- Phishing scammers are posting fake “account restricted” comments on LinkedIn
January 14, 2026
Recently, fake LinkedIn profiles have started posting comment replies claiming that a user has “engaged in activities that are not in compliance” with LinkedIn’s policies and that their account has been “temporarily restricted” until they submit an appeal through a specified link in the comment. The accounts posting the comments all try to look like official ...

