Category Archives: Advisories

Advisories

Multiple Vulnerabilities in Google Chrome Could Allow for Arbitrary Code Execution

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Multiple vulnerabilities have been discovered in Google Chrome, the most severe of which could allow for arbitrary code execution. Google Chrome is a web browser used to access the Internet. Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute arbitrary code in the context of the browser. Depending on the privileges associated with the application, an attacker could view, change, or delete data. If this application has been configured to have fewer user rights on the system, exploitation of the most severe of these vulnerabilities could have less impact than if it was configured with administrative rights.

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Advisories

A Vulnerability in Mitel MiCollab and MiVoice Business Express Could Allow for Unauthorized Disclosure of Data

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A vulnerability has been discovered in Mitel MiCollab and MiVoice Business Express, which could allow for the unauthorized disclosure of data as well as result in denial of service.

Mitel MiCollab is an enterprise collaboration software and tools platform solution that securely provides communications.
MiVoice Business Express provides a complete communications solution for small to mid-range businesses.
Successful exploitation of this vulnerability could allow for unauthorized disclosure of data as well as result in denial of service. Depending on the goal of the attacker they could view sensitive information that should not be accessible, or create denial of service conditions within impacted the system.

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Advisories

CVE-2020-15936

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A improper input validation in Fortinet FortiGate version 6.4.3 and below, version 6.2.5 and below, version 6.0.11 and below, version 5.6.13 and below allows attacker to disclose sensitive information via SNI Client Hello TLS packets.

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Advisories

Remote Utilities Software Distributed in Ukraine via Fake Evacuation Plan Email

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FortiGuard Labs is aware that a copy of Remote Manipulator System (RMS) was submitted from Ukraine to VirusTotal on February 28th, 2022. The RMS is a legitimate remote administration tool that allows a user to remotely control another computer. The file name is in Ukrainian and is “Evacuation Plan (approved by the SSU on 28.02.2022 by Order No. 009363677833).exe” in translation to English. The SSU likely stands for the Security Service of Ukraine. Why is this Significant?This is significant because given its file name, the country where the file was submitted to VirusTotal and the current situation in Ukraine, the file may have been distributed to Ukrainians.What does the File Do?The file silently installs a copy of legitimate Remote Utilities software to the compromised machine. The software allows a remote user to control the compromised machine.Based on the telemetry FortiGuard Labs collected, there is one IP address in Ukraine that connected to the remote IP that likely belongs to the attacker. How was the File Distributed to the Targets?Most likely via links in email.CERT-UA published a warning today that “the representatives of the Center for Combating Disinformation began to receive requests for information from the mail of the Ukrainian Security Service. Such notifications are fake and are a cyberattack”. The email below is reported have been used in the attack.Machine translation:Email subject: Evacuation plan from: SBU (Urgent) -28.02.2022 day off: 534161WARNING! This is an external sheet: do not click on the links or open a tab if you do not trust the editor.Report a suspicious list to ib@gng.com.ua.Security Service of UkraineGood afternoon, you need to have acquainted with the electronic evacuation plan until 01.03.2022, to give data on the number of employees, fill in the document in accordance with Form 1980-22SBU-98.To ensure confidentiality of the transferred data, the password: 2267903645 is set on the deposit.See the document on:hxxps://mega.nz/file/[reducted]Mirror 2: hxxps://files.dp.ua/en/[reducted]Mirror 3: hxxps://dropmefiles.com/[reducted]While the remote files were not available at the time of the investigation, the email and “Evacuation Plan (approved by the SSU on 28.02.2022 by Order No. 009363677833).exe” are likely connected based on the email content and the file name. Can the File Attributed to a Particular Threat Actor?It’s possible that a threat actor distributed the file to target Ukraine. However, while the Remote Utilities software is silently installed on the compromised machine, it displays an icon in Windows’s taskbar. Since most threat actors aim to hide their activities, this is potentially an act of novice attacker who tries to take advantage of the current situation in Ukraine.What is the Status of Coverage?FortiGuard Labs provides the following AV coverage against the files involved in this attack:Riskware/RemoteAdmin_RemoteUtilities

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Advisories

CVE-2020-4925

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A security vulnerability in the Spectrum Scale 5.0 and 5.1 allows a non-root user to overflow the mmfsd daemon with requests and preventing the daemon to service other requests. IBM X-Force ID: 191599.

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Advisories

Kernel Level Rat “Daxin” Discovered

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FortiGuard Labs is aware of a newly discovered backdoor dubbed Daxin. Discovered by Symantec, this backdoor allows an attacker to gather and perform various command and control actions and data exfiltration on victim machines. Because of our partnership with the Cyber Threat Alliance, we were provided with IOCs to create Fortinet protections in advance so that it would be ready for today’s announcement.What separates this backdoor from many others is that Daxin is a Windows kernel level driver, also referred to as rootkits. Kernel level rootkits operate at ring 0, which allows them to operate at
the highest privileges of the operating system with impunity. What makes this threat dangerous and very effective is that it is able to leverage existing services and utilize them to perform whatever is needed without raising any suspicion by network administrators and or endpoint security software. Daxin does not contain any unique capabilities from other backdoors; however, besides its ability to run at kernel level, Daxin can also intercept TCP/IP connections in real time for further evasion. Further communications noted were the use of a custom TCP/IP stack to communicate in multiple nodes on highly secured networks.This backdoor has been attributed to state sponsored threat actors of China where targets are organizations that are of interest to the Chinese government.What Operating Systems Were Targeted?Windows operating systems.What is the Likelihood of Exploitation?Low. This is due to the attacks observed being focused on the specific interests by the threat actors behind Daxin, and not as part of a widespread attack.Is this Limited to Targeted Attacks?Yes, all attacks observed were limited to state sponsored targets. This included governmental organizations of interest, telecommunications, transportation, and manufacturing sectors as well.What is the Status of Coverage?Customers running the latest AV definitions are protected by the following signatures:W32/Agent.FF56!tr.bdrW32/Backdoor.DAXIN!trW32/PossibleThreatW64/Agent.FF56!tr.bdrW64/Backdoor.DAXIN!trW64/Agent.QWHWSZ!trMalicious_Behavior.SBW32/Exforel.B!tr.bdrDx.BG3D!trW64/Agent.WT!trW32/PossibleThreat

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