Ransomware Cyber Attack Forced the Largest U.S. Fuel Pipeline to Shut Down

Colonial Pipeline, which carries 45% of the fuel consumed on the U.S. East Coast, on Saturday said it halted operations due to a ransomware attack, once again demonstrating how critical infrastructure is vulnerable to cyber attacks. "On May 7, the Colonial Pipeline Company learned it was the vict...

The UNC2529 Triple Double: A Trifecta Phishing Campaign

In December 2020, Mandiant observed a widespread, global phishing campaign targeting numerous organizations across an array of industries. Mandiant tracks this threat actor as UNC2529. Based on the considerable infrastructure employed, tailored phishing lures and the professionally coded...

Hackers Exploit SonicWall Zero-Day Bug in FiveHands Ransomware Attacks

An "aggressive" financially motivated threat group tapped into a zero-day flaw in SonicWall VPN appliances prior to it being patched by the company to deploy a new strain of ransomware called FIVEHANDS. The group, tracked by cybersecurity firm Mandiant as UNC2447, took advantage of an "improper S...

UNC2447 SOMBRAT and FIVEHANDS Ransomware: A Sophisticated Financial Threat

Mandiant has observed an aggressive financially motivated group, UNC2447, exploiting one SonicWall VPN zero-day vulnerability prior to a patch being available and deploying sophisticated malware previously reported by other vendors as SOMBRAT. Mandiant has linked the use of SOMBRAT to the...

Ghostwriter Update: Cyber Espionage Group UNC1151 Likely Conducts Ghostwriter Influence Activity

In July 2020, Mandiant Threat Intelligence released a public report detailing an ongoing influence campaign we named “Ghostwriter.” Ghostwriter is a cyber-enabled influence campaign which primarily targets audiences in Lithuania, Latvia and Poland and promotes narratives critical of the North...

Take action! Multiple Pulse Secure VPN vulnerabilities exploited in the wild

Pulse Secure has alerted customers to the existence of an exploitable chain of attack against its Pulse Connect Secure PCS appliances. PCS provides Virtual Private Network VPN facilities to businesses, which use them to prevent unauthorized access to their networks and services. Cybersecurity...

Pulse Secure Critical Zero-Day Security Bug Under Active Exploit

A critical zero-day security vulnerability in Pulse Secure VPN devices has been exploited by nation-state actors to launch cyberattacks against U.S. defense, finance and government targets, as well as victims in Europe, researchers said. Download “The Evolution of Ransomware” to gain valuable...

Check Your Pulse: Suspected APT Actors Leverage Authentication Bypass Techniques and Pulse Secure Zero-Day

Executive Summary Mandiant recently responded to multiple security incidents involving compromises of Pulse Secure VPN appliances. This blog post examines multiple, related techniques for bypassing single and multifactor authentication on Pulse Secure VPN devices, persisting across upgrades, and...

Zero-Day Exploits in SonicWall Email Security Lead to Enterprise Compromise

In March 2021, Mandiant Managed Defense identified three zero-day vulnerabilities in SonicWall’s Email Security ES product that were being exploited in the wild. These vulnerabilities were executed in conjunction to obtain administrative access and code execution on a SonicWall ES device. The...

M-Trends 2021: A View From the Front Lines

We are thrilled to launch M-Trends 2021, the 12th edition of our annual FireEye Mandiant publication. The past year has been unique, as we witnessed an unprecedented combination of global events. Business operations shifted in response to the worldwide pandemic and threat actors continued to...

Qualys Update on Accellion FTA Security Incident

Update April 2, 2021 to the March 3 original blog post: As part of our commitment to keeping customers and the community informed about how we are addressing and resolving the Accellion FTA cyber incident, we are providing the following update to confirm containment of the incident and share...

Mimecast Finds SolarWinds Hackers Stole Some of Its Source Code

Email security firm Mimecast on Tuesday revealed that the state-sponsored SolarWinds hackers who broke into its internal network also downloaded source code out of a limited number of repositories. "The threat actor did access a subset of email addresses and other contact information and hashed a...

Detection and Response to Exploitation of Microsoft Exchange Zero-Day Vulnerabilities

Beginning in January 2021, Mandiant Managed Defense observed multiple instances of abuse of Microsoft Exchange Server within at least one client environment. The observed activity included creation of web shells for persistent access, remote code execution, and reconnaissance for endpoint securit...

Shining a Light on SolarCity: Practical Exploitation of the X2e IoT Device (Part One)

In 2019, Mandiant’s Red Team discovered a series of vulnerabilities present within Digi International’s ConnectPort X2e device, which allows for remote code execution as a privileged user. Specifically, Mandiant’s research focused on SolarCity’s now owned by Tesla rebranded ConnectPort X2e device...

Remediation and Hardening Strategies for Microsoft 365 to Defend Against UNC2452

UPDATE Oct. 28, 2021: Mandiant has recently observed targeted threat actors using EWS impersonation via the ApplicationImpersonation role to maintain persistent access to mailboxes in victim environments. Once the threat actor has access to this role, its abuse is hard to detect and provides the...

Purgalicious VBA: Macro Obfuscation With VBA Purging

Malicious Office documents remain a favorite technique for every type of threat actor, from red teamers to FIN groups to APTs. In this blog post, we will discuss "VBA Purging", a technique we have increasingly observed in the wild and that was first publicly documented by Didier Stevens in Februa...

In Wild Critical Buffer Overflow Vulnerability in Solaris Can Allow Remote Takeover — CVE-2020-14871

FireEye Mandiant has been investigating compromised Oracle Solaris machines in customer environments. During our investigations, we discovered an exploit tool on a customer’s system and analyzed it to see how it was attacking their Solaris environment. The FLARE team’s Offensive Task Force analyz...

FBI, DHS, HHS Warn of Imminent, Credible Ransomware Threat Against U.S. Hospitals

On Monday, Oct. 26, KrebsOnSecurity began following up on a tip from a reliable source that an aggressive Russian cybercriminal gang known for deploying ransomware was preparing to disrupt information technology systems at hundreds of hospitals, clinics and medical care facilities across the Unit...

Unhappy Hour Special: KEGTAP and SINGLEMALT With a Ransomware Chaser

Throughout 2020, ransomware activity has become increasingly prolific, relying on an ecosystem of distinct but co-enabling operations to gain access to targets of interest before conducting extortion. Mandiant Threat Intelligence has tracked several loader and backdoor campaigns that lead to the...

FIN11: Widespread Email Campaigns as Precursor for Ransomware and Data Theft

Mandiant Threat Intelligence recently promoted a threat cluster to a named FIN or financially motivated threat group for the first time since 2017. We have detailed FIN11's various tactics, techniques and procedures in a report that is available now by signing up for Mandiant Advantage Free. In...