ObliqueRAT: New RAT hits victims' endpoints via malicious documents

By Asheer Malhotra. Cisco Talos has observed a malware campaign that utilizes malicious Microsoft Office documents maldocs to spread a remote access trojan RAT we're calling "ObliqueRAT." These maldocs use malicious macros to deliver the second stage RAT payload. This campaign appears to target...

U.S. Finance Sector Hit with Targeted Backdoor Campaign

The financial services sector in the U.S. found itself under a barrage of cyberattacks last month, all bent on delivering a powerful backdoor called Minebridge. The attack chain employed a known method called “VBA Stomping” to avoid detection. According to researchers at FireEye, the campaigns,...

Microsoft Office365 Integrity Validation / Remote Code Execution

Exploit Title: Microsoft Office365 Remote Code Execution Vulnerability Date: 2/11/19 Exploit Author: Social Engineering Neo - @EngineeringNeo Vendor Homepage: https://microsoft.com Software Link: https://office.com Version: Office365/ProPlus build 16.0.11727.20222, 16.0.11901.20170,...

CVE-2008-5050

Off-by-one error in the getunicodename function libclamav/vbaextract.c in Clam Anti-Virus ClamAV before 0.94.1 allows remote attackers to cause a denial of service crash or possibly execute arbitrary code via a crafted VBA project file, which triggers a heap-based buffer overflow...

More U.S. Utility Firms Targeted in Evolving LookBack Spearphishing Campaign

A spearphishing campaign, first spotted in July targeting three U.S. utility companies with a new malware variant, has evolved its tactics and extended its targeting to include nearly 20 companies. The campaign was first discovered in phishing emails, sent between July 19 and 25, which targeted...

Update for Windows Server 2008 SP2: August 16, 2019

Update for Windows Server 2008 SP2: August 16, 2019 Summary This non-security update for Windows Server 2008 SP2 includes the quality improvements from KB4512491 released August 16, 2019, in addition to these key changes: Addresses an issue in which the following may stop responding and you may...

Update for Windows 8.1 and Windows Server 2012 R2: April 25, 2019

Update for Windows 8.1 and Windows Server 2012 R2: April 25, 2019 Summary This update includes the quality improvements from KB4493467, in addition to new Japanese Era related changes. Key changes include: Updates the NLS registry to support the new Japanese Era. Addresses an issue that causes th...

Recent MuddyWater-associated BlackWater campaign shows signs of new anti-detection techniques

This blog was authored by Danny Adamitis, David Maynor, and Kendall McKay Executive summary Cisco Talos assesses with moderate confidence that a campaign we recently discovered called "BlackWater" is associated with suspected persistent threat actor MuddyWater. Newly associated samples from April...

Malicious MS Office Macro Creator

Evil Clippy is a tool for creating malicious Microsoft Office macros: At BlackHat Asia we released Evil Clippy, a tool which assists red teamers and security testers in creating malicious MS Office documents. Amongst others, Evil Clippy can hide VBA macros, stomp VBA code via p-code and confuse...

Evil Clippy - A Cross-Platform Assistant For Creating Malicious MS Office Documents

A cross-platform assistant for creating malicious MS Office documents. Can hide VBA macros, stomp VBA code via P-Code and confuse macro analysis tools. Runs on Linux, OSX and Windows. Current features Hide VBA macros from the GUI editor VBA stomping P-code abuse Fool analyst tools Serve VBA stomp...

Microsoft Office Trust Access to VBA Project Model Object Enabled

A Microsoft Office application installed on the remote host has trust access to VBA project model object enabled. C Tenable Network Security, Inc. The descriptive text and package checks in this plugin were extracted from the Microsoft Security Updates API. The text itself is copyright C Microsof...

TAU Threat Intelligence Notification: Operation SharpShooter

Operation Sharpshooter, leverages an embedded shellcode as an in-memory implant to download and retrieve a second-stage implant, which is known as Rising Sun. Rising Sun uses source code from the Duuzer backdoor that has been used in a past campaign of Lazarus group. This newly discovered campaig...

March 12, 2019—KB4489884 (Security-only update)

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TAU Threat Intelligence Notification: DarkHydrus/RogueRobin

Recently, Palo Alto Unit 42 released an updated report regarding new DarkHydrus delivery documents, which includes the installation of an updated variant of the RogueRobin trojan. This document includes details on both DarkHydrus and RogueRobin, along with detection rules and search queries that...

Threat Roundup for Feb. 8 to Feb. 15

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between Feb. 08 and Feb. 15. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral characteristics...

New malware found using Google Drive as its command-and-control server

Since most security tools also keep an eye on the network traffic to detect malicious IP addresses, attackers are increasingly adopting infrastructure of legitimate services in their attacks to hide their malicious activities. Cybersecurity researchers have now spotted a new malware attack campai...

Threat Roundup for Nov. 23 to Nov. 30

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between Nov. 23 and Nov. 30. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral characteristics...

Vba2Graph - Generate Call Graphs From VBA Code, For Easier Analysis Of Malicious Documents

A tool for security researchers, who waste their time analyzing malicious Office macros. Generates a VBA call graph, with potential malicious keywords highlighted. Allows for quick analysis of malicous macros, and easy understanding of the execution flow. @MalwareCantFly Features Keyword...

ThreatList: Microsoft IIS Sees Triple-Digit Spike in Cyberattack Volume

Internet Information Services IIS, an extensible web server originally created by Microsoft for use with the Windows NT family, saw a whopping 782x increase in cyberattacks during the second quarter, according to analysis. According to eSentire’s latest threat report based on data gathered from...

Office VBA + AMSI: Parting the veil on malicious macros

As part of our continued efforts to tackle entire classes of threats, Office 365 client applications now integrate with Antimalware Scan Interface AMSI, enabling antivirus and other security solutions to scan macros and other scripts at runtime to check for malicious behavior. Macro-based threats...