#1 Trusted Cybersecurity News Platform Followed by 4.50+ million
The Hacker News Logo
Get the Free Newsletter
SaaS Security

Microsoft office | Breaking Cybersecurity News | The Hacker News

Hackers Exploiting MS Excel Vulnerability to Spread Agent Tesla Malware

Hackers Exploiting MS Excel Vulnerability to Spread Agent Tesla Malware
Dec 21, 2023 Vulnerability / Phishing Attack
Attackers are weaponizing an old Microsoft Office vulnerability as part of phishing campaigns to distribute a strain of malware called  Agent Tesla . The infection chains leverage decoy Excel documents attached in invoice-themed messages to trick potential targets into opening them and activate the exploitation of CVE-2017-11882 (CVSS score: 7.8), a memory corruption vulnerability in Office's Equation Editor that could result in code execution with the privileges of the user. The findings, which come from Zscaler ThreatLabz, build on prior reports from Fortinet FortiGuard Labs, which detailed a  similar phishing campaign  that exploited the security flaw to deliver the malware. "Once a user downloads a malicious attachment and opens it, if their version of Microsoft Excel is vulnerable, the Excel file initiates communication with a malicious destination and proceeds to download additional files without requiring any further user interaction," security researcher Kaiva

Post-Macro World Sees Rise in Microsoft OneNote Documents Delivering Malware

Post-Macro World Sees Rise in Microsoft OneNote Documents Delivering Malware
Feb 03, 2023 Attack Vector / Endpoint Security
In a continuing sign that threat actors are adapting well to a  post-macro world , it has emerged that the use of Microsoft OneNote documents to deliver malware via phishing attacks is on the rise. Some of the notable malware families that are being distributed using this method include AsyncRAT,  RedLine Stealer , Agent Tesla,  DOUBLEBACK , Quasar RAT, XWorm,  Qakbot ,  BATLOADER , and  FormBook . Enterprise security firm Proofpoint said it detected over 50 campaigns leveraging OneNote attachments in the month of January 2023 alone. In some instances, the email phishing lures contain a OneNote file, which, in turn, embeds an HTA file that invokes a PowerShell script to retrieve a malicious binary from a remote server. Other scenarios entail the execution of a rogue VBScript that's embedded within the OneNote document and concealed behind an image that appears as a seemingly harmless button. The VBScript, for its part, is designed to drop a PowerShell script to run DOUBLEBACK

Cybersecurity Tactics FinServ Institutions Can Bank On in 2024

Cybersecurity Tactics FinServ Institutions Can Bank On in 2024
Feb 14, 2024Financial Security / Cyber Threats
The landscape of cybersecurity in financial services is undergoing a rapid transformation. Cybercriminals are exploiting advanced technologies and methodologies, making traditional security measures obsolete. The challenges are compounded for community banks that must safeguard sensitive financial data against the same level of sophisticated threats as larger institutions, but often with more limited resources. The FinServ Threat Landscape Recent trends show an alarming increase in sophisticated cyber-attacks. Cybercriminals now deploy advanced techniques like deep fake technology and AI-powered attacks, making it increasingly difficult for banks to differentiate between legitimate and malicious activities. These developments necessitate a shift towards more sophisticated and adaptive cybersecurity measures. Take these industry statistics, for example. Financial firms report 703 cyberattack attempts per week.1 On average, 270 attacks (entailing unauthorized access of data, appl

APT Hackers Turn to Malicious Excel Add-ins as Initial Intrusion Vector

APT Hackers Turn to Malicious Excel Add-ins as Initial Intrusion Vector
Dec 28, 2022 Malware / Windows Security
Microsoft's decision to block Visual Basic for Applications (VBA) macros by default for Office files downloaded from the internet has led many threat actors to improvise their attack chains in recent months. Now according to Cisco Talos , advanced persistent threat (APT) actors and commodity malware families alike are increasingly using Excel add-in (.XLL) files as an initial intrusion vector. Weaponized Office documents delivered via spear-phishing emails and other social engineering attacks have remained one of the widely used entry points for criminal groups looking to execute malicious code. These documents traditionally prompt the victims to enable macros to view seemingly innocuous content, only to activate the execution of malware stealthily in the background. To counter this misuse, the Windows maker enacted a crucial change starting in July 2022 that blocks macros in Office files attached to email messages, effectively severing a crucial attack vector. While this

The Critical State of AI in the Cloud

cyber security
websiteWiz.ioArtificial Intelligence / Cloud Security
Wiz Research reveals the explosive growth of AI adoption and what 150,000+ cloud accounts revealed about the AI surge.

New Malware Campaign Targeting Job Seekers with Cobalt Strike Beacons

New Malware Campaign Targeting Job Seekers with Cobalt Strike Beacons
Sep 30, 2022
A social engineering campaign leveraging job-themed lures is weaponizing a years-old remote code execution flaw in Microsoft Office to deploy Cobalt Strike beacons on compromised hosts. "The payload discovered is a leaked version of a Cobalt Strike beacon," Cisco Talos researchers Chetan Raghuprasad and Vanja Svajcer  said  in a new analysis published Wednesday. "The beacon configuration contains commands to perform targeted process injection of arbitrary binaries and has a high reputation domain configured, exhibiting the redirection technique to masquerade the beacon's traffic." The malicious activity, discovered in August 2022, attempts to exploit the vulnerability  CVE-2017-0199 , a remote code execution issue in Microsoft Office, that allows an attacker to take control of an affected system. The entry vector for the attack is a phishing email containing a Microsoft Word attachment that employs job-themed lures for roles in the U.S. government and Publ

Chinese Espionage Hackers Target Tibetans Using New LOWZERO Backdoor

Chinese Espionage Hackers Target Tibetans Using New LOWZERO Backdoor
Sep 26, 2022
A China-aligned advanced persistent threat actor known as TA413 weaponized recently disclosed flaws in Sophos Firewall and Microsoft Office to deploy a never-before-seen backdoor called LOWZERO as part of an espionage campaign aimed at Tibetan entities. Targets primarily consisted of organizations associated with the Tibetan community, including enterprises associated with the Tibetan government-in-exile. The intrusions involved the exploitation of  CVE-2022-1040  and  CVE-2022-30190  (aka "Follina"), two remote code execution vulnerabilities in Sophos Firewall and Microsoft Office, respectively. "This willingness to rapidly incorporate new techniques and methods of initial access contrasts with the group's continued use of well known and reported capabilities, such as the Royal Road RTF weaponizer, and often lax infrastructure procurement tendencies," Recorded Future  said  in a new technical analysis. TA413, also known as LuckyCat, has been linked to rel

Hackers Hide Malware in Stunning Images Taken by James Webb Space Telescope

Hackers Hide Malware in Stunning Images Taken by James Webb Space Telescope
Aug 31, 2022
A persistent Golang-based malware campaign dubbed GO#WEBBFUSCATOR has leveraged the deep field image taken from NASA's James Webb Space Telescope (JWST) as a lure to deploy malicious payloads on infected systems. The development, revealed by Securonix , points to the growing adoption of Go among threat actors, given the programming language's cross-platform support, effectively allowing the operators to leverage a common codebase to target different operating systems. Go binaries also have the added benefit of rendering reverse engineering a lot more challenging as opposed to malware written in other languages like C++ or C#, not to mention prolong analysis and detection attempts. Phishing emails containing a Microsoft Office attachment act as the entry point for the attack chain that, when opened, retrieves an obfuscated VBA macro, which, in turn, is auto-executed should the recipient enable macros. The execution of the macro results in the download of an image file &quo

Microsoft Resumes Blocking Office VBA Macros by Default After 'Temporary Pause'

Microsoft Resumes Blocking Office VBA Macros by Default After 'Temporary Pause'
Jul 22, 2022
Microsoft has officially resumed blocking Visual Basic for Applications (VBA) macros by default across Office apps, weeks after temporarily announcing plans to roll back the change. "Based on our review of customer feedback, we've made updates to both our  end user  and our  IT admin  documentation to make clearer what options you have for different scenarios," the company  said  in an update on July 20. Earlier this February, Microsoft publicized its plans to disable macros by default in Office applications such as Access, Excel, PowerPoint, Visio, and Word as a way to prevent threat actors from abusing the feature to deliver malware. It's a known fact that a majority of the damaging cyberattacks today leverage email-based phishing lures to spread bogus documents containing malicious macros as a primary vector for initial access. "Macros can add a lot of functionality to Office, but they are often used by people with bad intentions to distribute malware to

Hackers Exploiting Follina Bug to Deploy Rozena Backdoor

Hackers Exploiting Follina Bug to Deploy Rozena Backdoor
Jul 09, 2022
A newly observed phishing campaign is leveraging the recently disclosed Follina security vulnerability to distribute a previously undocumented backdoor on Windows systems. "Rozena is a backdoor malware that is capable of injecting a remote shell connection back to the attacker's machine," Fortinet FortiGuard Labs researcher Cara Lin  said  in a report this week. Tracked as  CVE-2022-30190 , the now-patched Microsoft Windows Support Diagnostic Tool (MSDT) remote code execution vulnerability has come under heavy exploitation in recent weeks ever since it came to light in late May 2022. The starting point for the latest attack chain observed by Fortinet is a weaponized  Office document  that, when opened, connects to a  Discord CDN URL  to retrieve an HTML file (" index.htm ") that, in turn, invokes the diagnostic utility using a PowerShell command to download next-stage payloads from the same CDN attachment space. This includes the Rozena implant ("Word

Microsoft Temporarily Rolls Back Plan to Block Office VBA Macros by Default

Microsoft Temporarily Rolls Back Plan to Block Office VBA Macros by Default
Jul 08, 2022
Five months after announcing plans to disable Visual Basic for Applications (VBA) macros by default in the Office productivity suite, Microsoft appears to have rolled back its plans. "Based on feedback received, a rollback has started," Microsoft employee Angela Robertson  said  in a July 6 comment. "An update about the rollback is in progress. I apologize for any inconvenience of the rollback starting before the update about the change was made available." When reached by The Hacker News, Redmond said its decision to reverse course was temporary and that it's working to incorporate further usability improvements. "Following user feedback, we have rolled back this change temporarily while we make some additional changes to enhance usability," a Microsoft spokesperson said. "This is a temporary change, and we are fully committed to making the default change for all users. Regardless of the default setting, customers can block internet macros th

A Microsoft Office 365 Feature Could Help Ransomware Hackers Hold Cloud Files Hostage

A Microsoft Office 365 Feature Could Help Ransomware Hackers Hold Cloud Files Hostage
Jun 16, 2022
A "dangerous piece of functionality" has been discovered in Microsoft 365 suite that could be potentially abused by a malicious actor to mount attacks on cloud infrastructure and ransom files stored on SharePoint and OneDrive. The cloud ransomware attack makes it possible to launch file-encrypting malware to "encrypt files stored on SharePoint and OneDrive in a way that makes them unrecoverable without dedicated backups or a decryption key from the attacker," Proofpoint  said  in a report published today. The infection sequence can be carried out using a combination of Microsoft APIs, command-line interface (CLI) scripts, and PowerShell scripts, the enterprise security firm added. The attack, at its core, hinges on a Microsoft 365 feature called AutoSave that creates copies of older file versions as and when users make edits to a file stored on OneDrive or SharePoint Online. It commences with gaining unauthorized access to a target user's SharePoint Online

State-Backed Hackers Exploit Microsoft 'Follina' Bug to Target Entities in Europe and U.S

State-Backed Hackers Exploit Microsoft 'Follina' Bug to Target Entities in Europe and U.S
Jun 06, 2022
A suspected state-aligned threat actor has been attributed to a new set of attacks exploiting the Microsoft Office "Follina" vulnerability to target government entities in Europe and the U.S. Enterprise security firm Proofpoint said it blocked attempts at exploiting the remote code execution flaw, which is being tracked as  CVE-2022-30190  (CVSS score: 7.8). No less than 1,000 phishing messages containing a lure document were sent to the targets. "This campaign masqueraded as a salary increase and utilized an RTF with the exploit payload downloaded from 45.76.53[.]253," the company  said  in a series of tweets. The payload, which manifests in the form of a PowerShell script, is Base64-encoded and functions as a downloader to retrieve a second PowerShell script from a remote server named "seller-notification[.]live." "This script checks for virtualization, steals information from local browsers, mail clients and file services, conducts machine re

Chinese Hackers Begin Exploiting Latest Microsoft Office Zero-Day Vulnerability

Chinese Hackers Begin Exploiting Latest Microsoft Office Zero-Day Vulnerability
Jun 01, 2022
An advanced persistent threat (APT) actor aligned with Chinese state interests has been observed weaponizing the new  zero-day flaw  in Microsoft Office to achieve code execution on affected systems. "TA413 CN APT spotted [in-the-wild] exploiting the Follina zero-day using URLs to deliver ZIP archives which contain Word Documents that use the technique," enterprise security firm Proofpoint  said  in a tweet. "Campaigns impersonate the 'Women Empowerments Desk' of the Central Tibetan Administration and use the domain tibet-gov.web[.]app." TA413  is best known for its campaigns aimed at the Tibetan diaspora to deliver implants such as  Exile RAT  and  Sepulcher  as well as a rogue Firefox browser extension dubbed  FriarFox . The high-severity security flaw, dubbed Follina and tracked as CVE-2022-30190 (CVSS score: 7.8), relates to a case of remote code execution that abuses the "ms-msdt:" protocol URI scheme to execute arbitrary code. Specific

Watch Out! Researchers Spot New Microsoft Office Zero-Day Exploit in the Wild

Watch Out! Researchers Spot New Microsoft Office Zero-Day Exploit in the Wild
May 30, 2022
Cybersecurity researchers are calling attention to a zero-day flaw in Microsoft Office that could be abused to achieve arbitrary code execution on affected Windows systems. The vulnerability came to light after an independent cybersecurity research team known as nao_sec uncovered a Word document (" 05-2022-0438.doc ") that was uploaded to VirusTotal from an IP address in Belarus. "It uses Word's external link to load the HTML and then uses the 'ms-msdt' scheme to execute PowerShell code," the researchers  noted  in a series of tweets last week. According to security researcher Kevin Beaumont, who dubbed the flaw "Follina," the maldoc leverages Word's  remote template  feature to fetch an HTML file from a server, which then makes use of the "ms-msdt://" URI scheme to run the malicious payload. The shortcoming has been so named because the malicious sample references 0438, which is the area code of Follina, a municipality in t

Microsoft Issues Patches for 2 Windows Zero-Days and 126 Other Vulnerabilities

Microsoft Issues Patches for 2 Windows Zero-Days and 126 Other Vulnerabilities
Apr 13, 2022
Microsoft's Patch Tuesday updates for the month of April have addressed a  total of 128 security vulnerabilities  spanning across its software product portfolio, including Windows, Defender, Office, Exchange Server, Visual Studio, and Print Spooler, among others. 10 of the 128 bugs fixed are rated Critical, 115 are rated Important, and three are rated Moderate in severity, with one of the flaws listed as publicly known and another under active attack at the time of the release. The updates are in addition to  26 other flaws  resolved by Microsoft in its Chromium-based Edge browser since the start of the month. The actively exploited flaw ( CVE-2022-24521 , CVSS score: 7.8) relates to an elevation of privilege vulnerability in the Windows Common Log File System (CLFS). Credited with reporting the flaw are the U.S. National Security Agency (NSA) and CrowdStrike researchers Adam Podlosky and Amir Bazine. The second publicly-known zero-day flaw ( CVE-2022-26904 , CVSS score: 7.0)

Microsoft Disables Internet Macros in Office Apps by Default to Block Malware Attacks

Microsoft Disables Internet Macros in Office Apps by Default to Block Malware Attacks
Feb 08, 2022
Microsoft on Monday said it's taking steps to disable Visual Basic for Applications (VBA) macros by default across its products, including Word, Excel, PowerPoint, Access, and Visio, for documents downloaded from the web in an attempt to eliminate an entire class of attack vector. "Bad actors send macros in Office files to end users who unknowingly enable them, malicious payloads are delivered, and the impact can be severe including malware, compromised identity, data loss, and remote access," Kellie Eickmeyer  said  in a post announcing the move. While the company does warn users about permitting macros in Office files, unsuspecting victims — e.g., recipients of phishing emails — can still be lured into enabling the feature, effectively granting the attackers the ability to gain an initial foothold into the system. As part of the new change, when a user opens an attachment or downloads from the internet an untrusted Office file containing macros, the app displays a

Hackers Using Microsoft MSHTML Flaw to Spy on Targeted PCs with Malware

Hackers Using Microsoft MSHTML Flaw to Spy on Targeted PCs with Malware
Nov 25, 2021
A new Iranian threat actor has been discovered exploiting a now-addressed critical flaw in the Microsoft Windows MSHTML platform to target Farsi-speaking victims with a previously undocumented PowerShell-based information stealer designed to harvest extensive details from infected machines. "[T]he stealer is a PowerShell script, short with powerful collection capabilities — in only ~150 lines, it provides the adversary a lot of critical information including screen captures, Telegram files, document collection, and extensive data about the victim's environment," SafeBreach Labs researcher Tomer Bar  said  in a report published Wednesday. Nearly half of the targets are from the U.S., with the cybersecurity firm noting that the attacks are likely aimed at "Iranians who live abroad and might be seen as a threat to Iran's Islamic regime." The phishing campaign, which began in July 2021, involved the exploitation of CVE-2021-40444, a remote code execution fl

New 0-Day Attack Targeting Windows Users With Microsoft Office Documents

New 0-Day Attack Targeting Windows Users With Microsoft Office Documents
Sep 08, 2021
Microsoft on Tuesday warned of an actively exploited zero-day flaw impacting Internet Explorer that's being used to hijack vulnerable Windows systems by leveraging weaponized Office documents. Tracked as CVE-2021-40444 (CVSS score: 8.8), the remote code execution flaw is rooted in MSHTML (aka Trident), a proprietary browser engine for the now-discontinued Internet Explorer and which is used in Office to render web content inside Word, Excel, and PowerPoint documents. "Microsoft is investigating reports of a remote code execution vulnerability in MSHTML that affects Microsoft Windows. Microsoft is aware of targeted attacks that attempt to exploit this vulnerability by using specially-crafted Microsoft Office documents," the company  said . "An attacker could craft a malicious ActiveX control to be used by a Microsoft Office document that hosts the browser rendering engine. The attacker would then have to convince the user to open the malicious document. Users who

Hackers Posed as Aerobics Instructors for Years to Target Aerospace Employees

Hackers Posed as Aerobics Instructors for Years to Target Aerospace Employees
Jul 28, 2021
An Iranian cyberespionage group masqueraded as an aerobics instructor on Facebook in an attempt to infect the machine of an employee of an aerospace defense contractor with malware as part of a years-long social engineering and targeted malware campaign. Enterprise security firm Proofpoint attributed the covert operation to a state-aligned threat actor it tracks as TA456, and by the wider cybersecurity community under the monikers Tortoiseshell and Imperial Kitten. "Using the social media persona 'Marcella Flores,' TA456 built a relationship across corporate and personal communication platforms with an employee of a small subsidiary of an aerospace defense contractor," Proofpoint  said  in a report shared with The Hacker News. "In early June 2021, the threat actor attempted to capitalize on this relationship by sending the target malware via an ongoing email communication chain." Earlier this month, Facebook  revealed  it took steps to dismantle a &quo
Cybersecurity Resources