Everything We Know About CVE-2023-23397
Huntress is tracking CVE-2023-23397, a 0-day that impacts Microsoft Outlook and requires no user interaction to expose user credential hashes.
CVE-2023-23415
A Noteworthy Threat: How Cybercriminals are Abusing OneNote
Threat actors are taking advantage of Microsoft OneNote's ability to embed files and use social engineering techniques, such as phishing emails and lures inside the OneNote document, to get unsuspecting users to download and open malicious files.
Iran responsible for Charlie Hebdo attacks
Today, Microsoft’s Digital Threat Analysis Center (DTAC) is attributing a recent influence operation targeting the satirical French magazine Charlie Hebdo
No Macro? No Worries. VSTO Being Weaponized by Threat Actors
A software development toolset, VSTO is available in Microsoft’s Visual Studio IDE. It enables Office Add-In’s (a type of Office application extension) to be developed in .NET and also allows for Office documents to be created that will deliver and execute these Add-In’s.
Qakbot's Evolution Continues with New Strategies
Cyble Research & Intelligence Labs analyzes new strategies deployed by Qakbot to infect users via Microsoft OneNote.
Threat groups are using Windows LNK files to gain access
Microsoft's move last year to block macros by default in Office applications is forcing miscreants to find other tools with which to launch cyberattacks, including the software vendor's LNK files – the shortcuts Windows uses to point to other files.
ZINC weaponizing open-source software - Microsoft Security Blog
In recent months, Microsoft has detected a wide range of social engineering campaigns using weaponized legitimate open-source software by an actor we track as ZINC. Microsoft Threat Intelligence Center (MSTIC) observed activity targeting employees in organizations across multiple industries including media, defense and aerospace, and IT services in the US, UK, India, and Russia. Based on the observed tradecraft, infrastructure, tooling, and account affiliations, MSTIC attributes this campaign with high confidence to ZINC, a state-sponsored group based out of North Korea with objectives focused on espionage, data theft, financial gain, and network destruction.
Microsoft-signed malicious Windows drivers used in ransomware attacks
Microsoft has revoked several Chardware developer accounts after drivers signed through their profiles were used in cyberattacks, including ransomware incidents.
Preparing for a Russian cyber offensive against Ukraine this winter
As we report more fully below, in the wake of Russian battlefield losses to Ukraine this fall, Moscow has intensified its multi-pronged hybrid technology approach to pressure the sources of Kyiv’s military and political support, domestic and foreign. This approach has included destructive missile and cyber strikes on civilian infrastructure in Ukraine, cyberattacks on Ukrainian and now foreign-based supply chains, and cyber-enabled influence operations[1]—intended to undermine US, EU, and NATO political support for Ukraine, and to shake the confidence and determination of Ukrainian citizens.
Nation-state cyberattacks become more brazen as authoritarian leaders ramp up aggression
On February 23, 2022, the cybersecurity world entered a new age, the age of the hybrid war, as Russia launched both physical and digital attacks against Ukraine. This year’s Microsoft Digital Defense Report provides new detail on these attacks and on increasing cyber aggression coming from authoritarian leaders around the world.
Raspberry Robin worm part of larger ecosystem facilitating pre-ransomware activity
Microsoft has discovered recent activity indicating that the Raspberry Robin worm is part of a complex and interconnected malware ecosystem, with links to other malware families and alternate infection methods beyond its original USB drive spread.
Exploited Windows zero-day lets JavaScript files bypass security warnings
A new Windows zero-day allows threat actors to use malicious JavaScript files to bypass Mark-of-the-Web security warnings. Threat actors are already seen using the zero-day bug in ransomware attacks.
New “Prestige” ransomware impacts organizations in Ukraine and Poland
The Microsoft Threat Intelligence Center (MSTIC) has identified evidence of a novel ransomware campaign targeting organizations in the logistics and transportation industry in Ukraine and Poland utilizing a previously unidentified ransomware payload.
ZINC weaponizing open-source software
In recent months, Microsoft detected weaponization of legitimate open-source software by an actor the Microsoft Threat Intelligence Center (MSTIC) tracks as ZINC, targeting employees at media, defense and aerospace, and IT service provider organizations in the US, UK, India, and Russia.
Slack’s and Teams’ Lax App Security Raises Alarms
New research shows how third-party apps could be exploited to infiltrate these sensitive workplace tools.
Microsoft Issues Out-of-Band Patch for Flaw Allowing Lateral Movement, Ransomware Attacks
Microsoft this week released an out-of-band security update for its Endpoint Configuration Manager solution to patch a vulnerability that could be useful to malicious actors for moving around in a targeted organization’s network. The vulnerability is tracked as CVE-2022-37972 and it has been described by Microsoft as a medium-severity spoofing issue. The tech giant has credited Brandon Colley of Trimarc Security for reporting the flaw.
Malicious OAuth applications abuse cloud email services to spread spam
Microsoft discovered an attack where attackers installed a malicious OAuth application in compromised tenants and used their Exchange Online service to launch spam runs.
Malvertising on Microsoft Edge's News Feed pushes tech support scams
We uncovered a campaign on the Microsoft Edge home page where malicious ads are luring victims into tech support scams.
Undermining Microsoft Teams Security by Mining Tokens
In August 2022, the Vectra Protect team identified an attack path that enables malicious actors with file system access to steal credentials for any Microsoft Teams user who is signed in.
Microsoft investigates Iranian attacks against the Albanian government
Shortly after the destructive cyberattacks on the Albanian government in mid-July, the Microsoft Detection and Response Team (DART) was engaged to lead an investigation into the attacks.
Peut-on encore, en Suisse, recourir à des services cloud offerts par Microsoft ?
Dans une prise de position publiée le 13 juin 2022, le Préposé fédéral à la protection des données et à la transparence a estimé que le recours aux services cloud M365 de Microsoft serait susceptible de violer la Loi fédérale sur la protection des données, quand bien même le projet de la Caisse nationale suisse d'assurance en cas d'accidents (SUVA) envisage que les données soient hébergées en Suisse et que le cocontractant du responsable du traitement soit une entité européenne du Groupe Microsoft.
Looking for the ‘Sliver’ lining: Hunting for emerging command-and-control frameworks - Microsoft Security Blog
Threat actors evade detection by adopting the Sliver command-and-control (C2) framework in intrusion campaigns.
MagicWeb: NOBELIUM’s post-compromise trick to authenticate as anyone
Microsoft security researchers have discovered a post-compromise capability we’re calling MagicWeb, which is used by a threat actor we track as NOBELIUM to maintain persistent access to compromised environments.
Disrupting SEABORGIUM’s ongoing phishing operations
The Microsoft Threat Intelligence Center (MSTIC) has observed and taken actions to disrupt campaigns launched by SEABORGIUM in campaigns involve persistent phishing and credential theft campaigns leading to intrusions and data theft.
Large-Scale AiTM Attack targeting enterprise users of Microsoft email services
A ThreatLabz technical analysis of the latest variant of proxy-based AiTM attacks that are phishing enterprise users for their Microsoft credentials.
911 Proxy Service Implodes After Disclosing Breach
911[.]re, a proxy service that since 2015 has sold access to hundreds of thousands of Microsoft Windows computers daily, announced this week that it is shutting down in the wake of a data breach that destroyed key components of its…
Untangling KNOTWEED: European private-sector offensive actor using 0-day exploits
MSTIC and MSRC disclose technical details of a private-sector offensive actor (PSOA) tracked as KNOTWEED using multiple Windows and Adobe 0-day exploits, including one for the recently patched CVE-2022-22047, in limited and targeted attacks against European and Central American customers.
North Korean threat actor targets small and midsize businesses with H0lyGh0st ransomware
A group of actors originating from North Korea that MSTIC tracks as DEV-0530 has been developing and using ransomware in attacks since June 2021. This group, which calls itself H0lyGh0st, utilizes a ransomware payload with the same name.
From cookie theft to BEC: Attackers use AiTM phishing sites as entry point to further financial fraud
A large-scale phishing campaign that attempted to target over 10,000 organizations since September 2021 used adversary-in-the-middle (AiTM) phishing sites to steal passwords, hijack a user’s sign-in session, and skip the authentication process, even if the user had enabled multifactor authentication (MFA).