Ransomware Attackers Use Microsoft-Signed Drivers to Gain Access to Systems

Microsoft on Tuesday disclosed it took steps to implement blocking protections and suspend accounts that were used to publish malicious drivers that were certified by its Windows Hardware Developer Program. The tech giant said its investigation revealed the activity was restricted to a number of...

CISA Adds One Known Exploited Vulnerability to Catalog

CISA has added one new vulnerability to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. This type of vulnerability is a frequent attack vector for malicious cyber actors and poses a significant risk to the federal enterprise. Note: To view the newly added...

Probing Weaponized Chat Applications Abused in Supply-Chain Attacks

This report examines the infection chain and the pieces of malware used by malicious actors in supply-chain attacks that leveraged trojanized installers of chat-based customer engagement platforms...

CVE-2022-27518: Critical Fix Released for Exploited Citrix ADC, Gateway Vulnerability

Emergent threats evolve quickly, and as we learn more about this vulnerability, this blog post will evolve, too. On Tuesday, December 13, 2022, Citrix published Citrix ADC and Citrix Gateway Security Bulletin for CVE-2022-27518 announcing fixes for a critical unauthenticated remote code execution...

Obligatory ChatGPT Post

Seems like absolutely everyone everywhere is playing with Chat GPT. So I did, too…. Write an essay in the style of Bruce Schneier on how ChatGPT will affect cybersecurity. As with any new technology, the development and deployment of ChatGPT is likely to have a significant impact on the field of...

Actors, Threats and Vulnerabilities 5 – 11 December 2022

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Dissecting the Empire C2 Framework

Introduction In this blog we will be taking a quick dive into Empire, a popular open-source post-exploitation framework. Empire provides an adversary with the capability to expand his foothold in a victim’s environment by leveraging hundreds of modules, RATs in multiple languages and stealthy C2...

IIS modules: The evolution of web shells and how to detect them

Web exploitation and web shells are some of the most common entry points in the current threat landscape. Web servers provide an external avenue directly into your corporate network, which often results in web servers being an initial intrusion vector or mechanism of persistence. Monitoring for...

Cryptocurrency Mining Campaign Hits Linux Users with Go-based CHAOS Malware

A cryptocurrency mining attack targeting the Linux operating system also involved the use of an open source remote access trojan RAT dubbed CHAOS. The threat, which was spotted by Trend Micro in November 2022, remains virtually unchanged in all other aspects, including when it comes to terminatin...

Infinite approval given to DepositTradeHelper contract can be misused by malicious actors

Lines of code Vulnerability details Impact depositAndTrade function in DepositTradeHelper account has infinite approval to spend baseTokens & collateralTokens of user using offChain signatures. However, once swapRouter executes UniV3 swap transaction on line 33, the contract does not give up its...

Rackspace confirms it suffered a ransomware attack

It's not been a great week for cloud computing service provider Rackspace. On December 2, customers began experiencing problems connecting and logging into their Exchange environments. Rackspace started investigating and discovered an issue that affected its Hosted Exchange environments. Now...

CISA Releases Phishing Infographic

Today, CISA published a Phishing Infographic to help protect both organizations and individuals from successful phishing operations. This infographic provides a visual summary of how threat actors execute successful phishing operations. Details include metrics that compare the likelihood of certa...

DEV-0139 launches targeted attacks against the cryptocurrency industry

Over the past several years, the cryptocurrency market has considerably expanded, gaining the interest of investors and threat actors. Cryptocurrency itself has been used by cybercriminals for their operations, notably for ransom payment in ransomware attacks, but we have also observed threat...

Actors, Threats and Vulnerabilities 28 November – 4 December 2022

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Multiple Ransomware groups targets open RDP Ports

Threat Level Attack Report For a detailed threat advisory, download the pdf file here Summary Many ransomware attacks are being launched against exposed Remote Desktop services by Threat Actors. At present, five ransomware families are attacking open RDP ports...

Google Rolls Out New Chrome Browser Update to Patch Yet Another Zero-Day Vulnerability

Search giant Google on Friday released an out-of-band security update to fix a new actively exploited zero-day flaw in its Chrome web browser. The high-severity flaw, tracked as CVE-2022-4262, concerns a type confusion bug in the V8 JavaScript engine. Clement Lecigne of Google's Threat Analysis...

Leaked Android Platform Certificates Create Risks for Users

On November 30, 2022, a Google apvi report from Łukasz Siewierski initially filed on November 11, 2022 was made public. The report contained 10 different platform certificates and malware sample SHA256 sums where the malware sample had been signed by a platform certificate — the application signi...

Indicators of compromise (IOCs): how we collect and use them

It would hardly be an exaggeration to say that the phrase "indicators of compromise" or IOCs can be found in every report published on the Securelist. Usually after the phrase there are MD5 hashes1, IP addresses and other technical data that should help information security specialists to counter...

Update Chrome Browser Now to Patch New Actively Exploited Zero-Day Flaw

Google on Thursday released software updates to address yet another zero-day flaw in its Chrome web browser. Tracked as CVE-2022-4135, the high-severity vulnerability has been described as a heap buffer overflow in the GPU component. Clement Lecigne of Google's Threat Analysis Group TAG has been...

Iranian Government-Sponsored APT Actors Compromise Federal Network, Deploy Crypto Miner, Credential Harvester

Summary From mid-June through mid-July 2022, CISA conducted an incident response engagement at a Federal Civilian Executive Branch FCEB organization where CISA observed suspected advanced persistent threat APT activity. In the course of incident response activities, CISA determined that cyber...