Monday , June 16 2025

WinRAR zero-day exploited since April to hack trading accounts

Traders are falling victim to cybercriminals who are leveraging a zero-day vulnerability in WinRAR, the long-standing shareware archiving tool for Windows, in order to pilfer funds.

In June, the cybersecurity company Group-IB made a remarkable discovery – a vulnerability that impacts how WinRAR handles the ZIP file format. Hackers are able to exploit a zero-day flaw, which means the vendor has no time to fix it before it is exploited. This flaw enables them to conceal harmful scripts within archive files disguised as .jpg images or .txt files. Consequently, they can easily compromise their target machines.

Canada 2nd largest airlines “WestJet” investigates cyberattack disrupting internal systems

WestJet, Canada's second-largest airline, is looking into a cyberattack that has affected some internal systems during its response to the...
Read More
Canada 2nd largest airlines “WestJet” investigates cyberattack disrupting internal systems

Paraguay 7.4 Million Citizen Records Leaked on Dark Web

Resecurity found 7.4 million records of Paraguayan citizens' personal information leaked on the dark web today. Last week, cybercriminals attempted...
Read More
Paraguay 7.4 Million Citizen Records Leaked on Dark Web

High-Severity Flaw in HashiCorp Nomad Allows Privilege Escalation

HashiCorp has revealed a critical vulnerability in its Nomad tool that may let attackers gain higher privileges by misusing the...
Read More
High-Severity Flaw in HashiCorp Nomad Allows Privilege Escalation

SoftBank: Over 137,000 personal info leaked

SoftBank has disclosed that personal information of more than 137,000 mobile subscribers—covering names, addresses, and phone numbers—might have been leaked...
Read More
SoftBank: Over 137,000 personal info leaked

Alert
Trend Micro Apex One Flaw Allow Attackers to Inject Malicious Code

Serious security vulnerabilities in Trend Micro Apex One could allow attackers to inject malicious code and elevate their privileges within...
Read More
Alert  Trend Micro Apex One Flaw Allow Attackers to Inject Malicious Code

Zero-Click AI Vulnerability Exposes Microsoft 365 Copilot Data Without User Action

Aim Labs discovered a zero-click AI vulnerability named “EchoLeak” in Microsoft 365 Copilot and reported several ways to exploit it...
Read More
Zero-Click AI Vulnerability Exposes Microsoft 365 Copilot Data Without User Action

Adobe Releases Patch Fixing 254 Vulnerabilities With High-Severity Security Gaps

On Tuesday, Adobe released security updates for 254 vulnerabilities in its software, mainly affecting Experience Manager (AEM). There are 254...
Read More
Adobe Releases Patch Fixing 254 Vulnerabilities With High-Severity Security Gaps

Alert
40,000 + live internet cameras exposed globally !

A new report from Bitsight reveals that over 40,000 internet-connected security cameras around the world are exposed, broadcasting live footage...
Read More
Alert  40,000 + live internet cameras exposed globally !

Microsoft patch Tuesday fix exploited zero-day and 65 vuls patched

Microsoft's June Patch Tuesday update has arrived, addressing 66 vulnerabilities across its product line. One of these flaws was actively...
Read More
Microsoft patch Tuesday fix exploited zero-day and 65 vuls patched

84,000+ Roundcube instances vulnerable to actively exploited flaw

More than 84,000 Roundcube webmail installations are at risk due to CVE-2025-49113, a severe remote code execution (RCE) vulnerability that...
Read More
84,000+ Roundcube instances vulnerable to actively exploited flaw

ALSO READ:

Kali Linux 2023.3 released: redesign NetHunter ,9 new tools, and more!

According to Group-IB, hackers have been taking advantage of this vulnerability since April in order to disseminate harmful ZIP archives on exclusive trading forums. Group-IB told malicious ZIP archives were posted on at least eight public forums. These forums discuss various topics related to trading, investment, and cryptocurrency. Group-IB declined to name the targeted forums.

The administrators of one of the targeted forums detected the presence of malicious files being shared and promptly issued a warning to their users. In addition to blocking the accounts used by the attackers, the forum also implemented measures to prevent their activities. However, Group-IB discovered evidence indicating that the hackers possessed the ability to bypass the account restrictions imposed by forum administrators. Consequently, they continued distributing malicious files by posting them in threads or sending them via private messages.

Hackers can gain access to brokerage accounts by tricking users into opening malware-infected files. This allows them to perform illegal financial transactions and withdraw funds. At the moment, the cybersecurity company informs that around 130 traders have infected devices. However, they mention that they do not have any information regarding financial losses at this point.
One victim told Group-IB researchers that the hackers attempted to withdraw their money, but were unsuccessful.

The mastermind behind the exploitation of the WinRAR zero-day remains a mystery. Group-IB, however, reported that it has detected the hackers utilizing DarkMe, a Visual Basic trojan associated with the notorious “Evilnum” threat group.

Evilnum, also referred to as “TA4563,” is a highly motivated threat group focused on financial gain, demonstrating significant activity within the United Kingdom. There has been evidence of this happening in Europe since at least 2018. The group has gained recognition for primarily focusing on financial organizations and online trading platforms. Group-IB stated that although they have identified the DarkMe trojan, they cannot definitively establish a direct connection between the detected campaign and this financially motivated group.

According to Group-IB, they have successfully reported the vulnerability, known as CVE-2023-38831, to Rarlab, the creators of WinRAR. On August 2nd, a new and improved WinRAR version (6.23) was released to fix the issue.

Check Also

FortiGate

Hackers retain access to patched FortiGate VPNs using symlinks

Recent incidents continue to bring this into focus with active exploitations of known vulnerabilities as …

Leave a Reply

Your email address will not be published. Required fields are marked *