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Date: 01/25/2023
Researchers from Mandiant have been tracking the active exploitation of a recently patched vulnerability in FortiGate firewalls (CVE-2022-42475). Mandiant asserts that Chinese attackers are likely deploying a variant of “BOLDMOVE” malware by exploiting this vulnerability. The referenced BOLDMOVE variant is specifically designed to run on FortiGate Firewalls.
According to Mandiant’s report, Chinese threat actors routinely exploit firewalls and other internet-facing devices. The capabilities of the referenced malware variant include information gathering, command and control of the firewall, and a remote connection into the infected entity’s environment.
Apply the latest patches from FortiGate, and search device logs for Indicators of Compromise (IOCs) using the FortiGate links below. If compromise is suspected, activate your organization’s incident response plan and perform threat-hunting activities.
Sources
https://www.mandiant.com/resources/blog/chinese-actors-exploit-fortios-flaw
https://therecord.media/suspected-chinese-hackers-exploit-vulnerability-in-fortinet-devices/Story
Fortinet articles with IOC information: https://community.fortinet.com/t5/FortiGate/Technical-Tip-Critical-vulnerability-Protect-against-heap-based/ta-p/239420 https://www.fortinet.com/blog/psirt-blogs/analysis-of-fg-ir-22-398-fortios-heap-based-buffer-overflow-in-sslvpnd
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According to an SEC filing by T-Mobile, a “bad actor was obtaining data through an Application Programming Interface (API)”. The filing reports that the bad actor obtained data from 37 million customer accounts. This is the latest in a string of successful attacks on T-Mobile since 2018, with four attacks leaking more than a million records.
T-Mobile users must put another breach report notice in their filing cabinets. Affected users should expect targeted attacks in the future from threat actors who may know a great deal about their victims.
Affected users should exercise a high level of caution when considering clicking on email links or responding to unsolicited text messages. Organizations can incorporate stories about breaches such as this one in their user training.
Sources
https://d18rn0p25nwr6d.cloudfront.net/CIK-0001283699/cd07a3a7-4109-47fe-a6c0-f16a300a3bf7.pdf
https://www.theregister.com/2023/01/20/t_mobile_us_data_breach/
Two vulnerabilities tracked as CVE-2022-4873 and CVE-2022-4874 involve stack-based buffer overflow and authentication bypass issues. Chaining the two vulnerabilities together permits an unauthenticated attacker to execute code remotely. Note that there are no reports of these vulnerabilities being exploited in the wild yet. Affected systems include Netcomm router models NF20MESH, NF20, and NL1902 running firmware versions earlier than R6B035.
Attackers can use this access as an entry point to launch additional attacks on the internal network. Furthermore, attackers could compromise the confidentiality or integrity of data transmitted through the device. Note that attackers need visibility to device web interfaces to exploit these vulnerabilities.
Administrators should update router firmware to address these vulnerabilities. Furthermore, access to device web interfaces should be restricted to management VLANs or jump hosts to reduce the risk of being targeted.
Sources
https://github.com/scarvell/advisories/blob/main/2022_netcomm_nf20mesh_unauth_rce.md
https://thehackernews.com/2023/01/critical-security-vulnerabilities.html
Kaspersky researchers have published findings detailing a new DNS changer function to the Roaming Mantis Malware strand Wroba.o/Agent.eq. This new function has been seen specifically targeting public Wi-Fi routers. Wroba.o has been active throughout 2022 and has increased prevalence in Q1 of 2023.
Kaspersky released multiple tactics, techniques, and procedures (TTPs) for Wroba.o including: · Targeting public Wi-Fi routers with hardcoded strings – see DNS changer in the malicious mobile app used by Roaming Mantis | Securelist for strings list.
· Connections to vk[.]com as the initial DNS IP destination.
· Generation of URL queries with rogue DNS IPs to compromise router DNS settings.
Additionally, Wroba.o has been seen being delivered via Android SMS phishing links and third-party APKs outside the Google Play store.
Once a router has been compromised, all the traffic will be forwarded through attacker-controlled servers allowing threat actors to capture any, and all network traffic. This is especially dangerous for organizations that utilize publicly available Wi-Fi within corporate offices. Organizations are recommended to monitor public Wi-Fi (or ‘Guest’ Wi-Fi) setups for any configuration changes, as well as investigate the Indicators of Compromise (IOCs) published by Kaspersky.
Sources
https://cyware.com/news/roaming-mantis-new-dns-changer-function-to-target-public-routers-33667a99
https://securelist.com/roaming-mantis-dns-changer-in-malicious-mobile-app/108464/
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