By Tom Hegel and Aleksandar Milenkoski
Executive Summary SentinelLabs has observed ongoing attacks from Kimsuky, a North Korean state-sponsored APT that has a long history of targeting organizations across Asia, North America, and Europe. Ongoing campaigns use a new malware component we call ReconShark, which is actively delivered to specifically targeted individuals through spear-phishing emails, OneDrive links leading to document downloads, and the execution of malicious macros.…Tag: HUNTING
Logo credit: RedCanary
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Ever since it first appeared in late 2021, the Raspberry Robin malware campaign has been propagating globally. A number of threat intelligence reports by vendors such as RedCanary (who named it) and Microsoft (who track it as DEV-0856/Storm-0856) have covered the malware campaign in great detail. …
Executive Summary
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On 21st March 2023, EclecticIQ researchers detected a spearphishing email targeting the healthcare industry in Poland. The spoofed email was designed to appear as legitimately sent from a Polish government entity called the National Health Fund (Narodowy Fundusz Zdrowia – NFZ).
The email contained a malicious Microsoft Excel XLL attachment that can download and execute Vidar Infostealer malware upon user execution.…
Two pillars in sleight of hand magic are User Initiated Action, where the target needs to believe their actions are their own, and Hidden Action, the trick needs to be concealed behind something ordinary and nonthreatening. Mandiant became aware of a chain of adversary methodologies that leverage these two pillars to achieve persistence.…
After months of dormancy, Earth Longzhi, a subgroup of advanced persistent threat (APT) group APT41, has reemerged using new techniques in its infection routine. This blog entry forewarns readers of Earth Longzhi’s resilience as a noteworthy threat.
We discovered a new campaign by Earth Longzhi (a subgroup of APT41) that targets organizations based in Taiwan, Thailand, the Philippines, and Fiji.…
The Uptycs threat research team has discovered a new ransomware binary attributed to the RTM group, a known ransomware-as-a-service (RaaS) provider. This is the first time the group has created a Linux binary. Its locker ransomware infects Linux, NAS, and ESXi hosts and appears to be inspired by Babuk ransomware’s leaked source code.…
With recent reports that Charming Kitten group (aka Mint Sandstorm) is actively targeting critical infrastructure in the US and other countries, we would like to share the most recent insights from Bitdefender Labs about modernization of Charming Kitten’s tactics, techniques, and procedures, including a new, previously unseen malware.…
Zero Day Initiative — TP-Link WAN-side Vulnerability CVE-2023-1389 Added to the Mirai Botnet Arsenal
Last week, the Zero Day Initiative (ZDI) threat-hunting team observed new exploit attempts coming from our telemetry system in Eastern Europe indicating that the Mirai botnet has updated its arsenal to include CVE-2023-1389, also known as ZDI-CAN-19557/ZDI-23-451. This bug in the TP-Link Archer AX21 Wi-Fi router was originally disclosed to ZDI during the Pwn2Own Toronto event, where it was used by Team Viettel in their LAN-side entry against the TP-Link device and by Qrious Security in their WAN-side entry. …
By Securonix Threat Labs, Threat Research: Den Iuzvyk, Tim Peck, Oleg Kolesnikov
TL;DRThe Securonix Threat Research team (STR) has recently observed a new attack campaign tracked by Securonix as OCX#HARVESTER. Some of the malicious payloads leveraged as part of the attack campaign observed appear to be related to the More_eggs malicious payloads reported earlier [1].…
Over the past several months, Sophos X-Ops has investigated multiple incidents where attackers attempted to disable EDR clients with a new defense evasion tool we’ve dubbed AuKill. The AuKill tool abuses an outdated version of the driver used by version 16.32 of the Microsoft utility, Process Explorer, to disable EDR processes before deploying either a backdoor or ransomware on the target system.…
Summary
Since the beginning of January 2023, the BlackBerry Threat Research and Intelligence team has been following two parallel malicious campaigns that use the same infrastructure but have different purposes.
The first campaign is related to a malvertising Google Ads Platform campaign which began several months ago and distributed fake versions of legitimate software products like AnyDesk (remote desktop software), Libre Office (an open-source office productivity software suite), TeamViewer (remote access and remote-control software), and Brave (a free and open-source web browser) among others.…
Over the past several months, Microsoft has observed a mature subgroup of Mint Sandstorm, an Iranian nation-state actor previously tracked as PHOSPHORUS, refining its tactics, techniques, and procedures (TTPs). Specifically, this subset has rapidly weaponized N-day vulnerabilities in common enterprise applications and conducted highly-targeted phishing campaigns to quickly and successfully access environments of interest.…
Executive Summary
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On February 09, 2023, EclecticIQ analysts identified a spear phishing campaign targeting Ukrainian government entities like the Foreign Intelligence Service of Ukraine (SZRU) and Security Service of Ukraine (SSU). Analysts identified a publicly exposed Simple Mail Transfer Protocol (SMTP) server and assess with high confidence that the threat actor used the SMTP server to craft and deliver phishing emails.…
The Uptycs threat research team has identified a new variant of credential stealing malware, dubbed Zaraza bot, that uses telegram as its command and control. Zaraza is the Russian word for infection.
Zaraza bot targets a large number of web browsers and is being actively distributed on a Russian Telegram hacker channel popular with threat actors.…
Key Takeaways
The FBI’s Internet Crime Complaint Center (IC3) recently published their internet crime report for 2022. The report indicates that during 2022 there was an increase in ransomware attacks, and the reported cases resulted in a loss of more than $34.3 million.
The report indicates that during 2022, the IC3 received 870 complaints regarding ransomware infection from organizations belonging to 14 out of 16 critical infrastructure sectors (e.g.,…
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This post is also available in: 日本語 (Japanese)
Executive SummaryUnit 42 recently discovered a malware campaign targeting Portuguese speakers, which aims to redirect cryptocurrency away from legitimate users’ wallets and into wallets controlled by threat actors instead. To do this, the campaign uses a type of malware known as a cryptocurrency clipper, which monitors the victim’s clipboard for signs that a cryptocurrency wallet address is being copied.…
April 2023 update – Microsoft Threat Intelligence has shifted to a new threat actor naming taxonomy aligned around the theme of weather. MERCURY is now tracked as Mango Sandstorm and DEV-1084 is now tracked as Storm-1084.
To learn more about the new taxonomy represents the origin, unique traits, and impact of threat actors, to get complete mapping of threat actor names, read this blog: Microsoft shifts to a new threat actor naming taxonomy.…
Rhadamanthys is an advanced infostealer which debuted on the dark web in September of last year to a warm critical reception by cybercriminals.
A maximalist approach to features: functionality is added for its own sake, never mind the effort required or expected payoff.
Campaigns by default target countries indiscriminately, excluding the commonwealth of independent states.…
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IcedID continues to deliver malspam emails to facilitate a compromise. This case covers the activity from a campaign in late September of 2022. Post exploitation activities detail some familiar and some new techniques and tooling, which led to domain wide ransomware.
This case shares similarities of the IcedID campaign detailed by Malware-Traffic-Analysis.net,…
Splunk is committed to using inclusive and unbiased language. This blog post might contain terminology that we no longer use. For more information on our updated terminology and our stance on biased language, please visit our blog post. We appreciate your understanding as we work towards making our community more inclusive for everyone.…