Security Signals (4/7/26-4/21/26)
Welcome to your biweekly digest of curated cybersecurity intelligence.
Every two weeks, we bring you expert insights and handpicked articles covering the latest threats, threat actor activity, vulnerabilities, incident trends, and defensive strategies. Whether you’re on the front lines or shaping your organization’s security posture, Security Signals delivers the information you need to stay informed and ready.
For more articles, check out our #onpatrol4malware blog.
March 2026 Edition
Key stats from real-world telemetry and live attack observations over the past month – a concise look at what we’re seeing across malware, phishing, ransomware, C2s, and domain abuse.
This Edition’s Articles
Mid April 2026 Cyber Threat Reports highlights a surge in supply chain attacks like STX RAT delivery via trojanized software, alongside APT28 router exploitation, Banshee Stealer activity, and evolving payroll phishing campaigns such as Storm-2755. Across cloud platforms, macOS environments, and critical infrastructure, attackers continue to blend social engineering, credential theft, and infrastructure abuse to scale real-world intrusions.
GlassWorm goes native: New Zig dropper infects every IDE on your machine
Source: Aikido
(Published: 08 April 2026)
We have been tracking GlassWorm for over a year. Read more.
Cyber Saga: In the Footsteps of the DPRK IT Workers
Source: Group-IB
(Published: 08 April 2026)
In recent years, the shift toward remote work has introduced unprecedented vulnerabilities into corporate hiring pipelines. Read more.
ClickFix technique uses Script Editor instead of Terminal on macOS
Source: Jamf
(Published: 08 April 2026)
Jamf Threat Labs discovered a ClickFix-style macOS attack that abuses the applescript:// URL scheme to launch Script Editor and deliver an Atomic Stealer infostealer payload – bypassing Terminal entirely. Read more.
Evasive Blob Phishing Detection
Source: ANY.RUN
(Published: 09 April 2026)
Attackers are increasingly using blob URLs in phishing campaigns to evade traditional detection and obscure malicious payload delivery. Read more.
MicroStealer and SparkStealer Credential Theft Infrastructure
Source: FalconFeeds
(Published: 09 April 2026)
Researchers uncovered a gaming-themed campaign distributing MicroStealer and SparkStealer malware through credential theft infrastructure. Read more.
Operation Phantom Claude: macOS Infostealer Campaign
Source: FalconFeeds
(Published: 09 April 2026)
Threat actors are impersonating Anthropic’s Claude platform to deliver macOS infostealers in a campaign dubbed Phantom Claude. Read more.
Investigating Storm-2755: “Payroll pirate” attacks targeting Canadian employees
Source: Microsoft
(Published: 09 April 2026)
Microsoft observed Storm-2755 targeting Canadian employees in payroll-themed attacks that use phishing and adversary-in-the-middle tradecraft to steal credentials and redirect salaries. Read more.
Unholy Trinity: Werewolves Target Law Enforcers
Source: BI.ZONE
(Published: 10 April 2026)
A coordinated campaign dubbed “Unholy Trinity” is targeting law enforcement agencies using a combination of advanced malware and social engineering techniques. Read more.
Fake GitHub Repositories Deliver SmartLoader and StealC
Source: HexaStrike
(Published: 10 April 2026)
Over 100 fake GitHub repositories were identified distributing SmartLoader and StealC malware to unsuspecting developers. Read more.
Active Exploitation of Critical Adobe Prototype Pollution Vulnerability
Source: Hive Pro
(Published: 10 April 2026)
Threat actors are actively exploiting a critical Adobe prototype pollution vulnerability to execute arbitrary code in affected environments. Read more.
Monitoring the Monitor: How CPUID’s HWMonitor Supply Chain Was Hijacked to Deploy STX RAT
Source: Cyderes
(Published: 10 April 2026)
Monitoring the Monitor: How CPUID’s HWMonitor Supply Chain Was Hijacked to Deploy STX RAT. Read more.
CPU-Z Trojan Delivers STX RAT and PureLogs Data Exfiltration
Source: Deception Pro
(Published: 11 April 2026)
A supply chain attack involving trojanized CPU-Z software installs STX RAT and PureLogs to exfiltrate sensitive data from infected systems. Read more.
APT28 Exploits SOHO Routers for DNS Hijacking
Source: Hive Pro
(Published: 11 April 2026)
APT28 is exploiting vulnerable SOHO routers to conduct large-scale DNS hijacking and credential theft operations. Read more.
Healthcare in the Crosshairs: Iran-Linked Cyber Threats
Source: PolySwarm
(Published: 12 April 2026)
Iran-linked cyber operations are increasingly targeting healthcare organizations and supply chains, raising risks across hospitals and medical infrastructure. Read more.
Iran-Linked PLC Exploitation Expands Across US Critical Infrastructure
Source: PolySwarm
(Published: 12 April 2026)
Threat actors linked to Iran are expanding PLC exploitation campaigns targeting US critical infrastructure sectors. Read more.
CyberAv3ngers Exploit Internet-Exposed PLCs in the US
Source: Hive Pro
(Published: 12 April 2026)
Iranian-affiliated CyberAv3ngers are targeting exposed PLC systems in the US to disrupt industrial control environments. Read more.
Pawn Storm Dual Zero-Day Exploitation Campaign
Source: Hive Pro
(Published: 13 April 2026)
Pawn Storm threat actors are leveraging dual zero-day vulnerabilities to execute targeted attacks against high-value organizations. Read more.
108 Chrome Extensions Linked to Data Exfiltration and Session Theft via Shared C2 Infrastructure
Source: Socket
(Published: 13 April 2026)
Socket’s Threat Research Team identified 108 malicious Chrome extensions operating as a coordinated campaign under a shared C2 infrastructure at `cloudapi[.]stream`. Read more.
Building a last-resort unpacker with AI
Source: Gen Digital
(Published: 13 April 2026)
Malicious software is often designed to hide its true behavior, wrapping its underlying logic in layers that make it difficult to analyze. Read more.
New Lua-Based Malware LucidRook
Source: Cisco Talos
(Published: 14 April 2026)
Cisco Talos identified LucidRook, a Lua-based malware strain designed for persistence and data exfiltration in targeted environments. Read more.
Storm-2755 Payroll Fraud Campaign
Source: Hive Pro
(Published: 14 April 2026)
Storm-2755 is conducting a stealthy payroll diversion campaign targeting organizations in Canada. Read more.
Are Former Black Basta Affiliates Automating Executive Targeting?
Source: ReliaQuest
(Published: 14 April 2026)
A new campaign is successfully evolving “Black Basta’s” signature social engineering playbook into a faster, more targeted, and increasingly automated intrusion method aimed at senior leadership. Read more.
The N8N N8mare Campaign
Source: Cisco Talos
(Published: 15 April 2026)
Threat actors are exploiting n8n automation workflows in a campaign dubbed N8mare to deploy malware and maintain persistence. Read more.
Vercel Confirms Data Breach
Source: CyberPress
(Published: 15 April 2026)
Vercel confirmed a data breach after attackers claimed access to internal systems and sensitive information. Read more.
UAT-10362 Deploys LucidRook Malware
Source: Hive Pro
(Published: 15 April 2026)
UAT-10362 is deploying LucidRook malware in targeted attacks against Taiwanese non-governmental organizations. Read more.
CVE-2026-39987 update: How attackers weaponized marimo to deploy a blockchain botnet via HuggingFace
Source: Sysdig
(Published: 15 April 2026)
Three days after the April 8, 2026, disclosure of a critical pre-authorization remote code execution (RCE) in the marimo Python notebook platform, the Sysdig Threat Research Team (TRT) observed multiple unique attacks, including a threat actor deploying malware that was hosted on HuggingFace Spaces using a marimo exploit. Read more.
CPU-Z Supply Chain Attack Delivers STX RAT
Source: CyberSec Sentinel
(Published: 16 April 2026)
A trojanized version of CPU-Z and HWMonitor software is being used to distribute STX RAT through a supply chain attack. Read more.
Astral Injection Supply Chain Attack
Source: JFrog Security Research
(Published: 16 April 2026)
The Astral Injection attack demonstrates a new supply chain technique targeting developer environments and package ecosystems. Read more.
A Deep Dive Into Attempted Exploitation of CVE-2023-33538
Source: Unit 42 (Palo Alto Networks)
(Published: 16 April 2026)
Unit 42 researchers analyzed attempted exploitation of CVE-2023-33538 and linked the activity to botnet-style command injection campaigns targeting vulnerable WiFi routers. Read more.
MiningDropper Android Malware Campaign
Source: Cyble
(Published: 17 April 2026)
MiningDropper is a modular Android malware campaign designed to deploy cryptomining payloads across infected devices globally. Read more.
Malicious dom-utils-lite NPM Package Installs SSH Backdoor
Source: SafeDep
(Published: 17 April 2026)
A malicious npm package installs an SSH backdoor, allowing attackers to maintain unauthorized access to compromised systems. Read more.
Banshee Stealer Technical Analysis
Source: DarkAtlas
(Published: 18 April 2026)
Researchers provide an in-depth technical breakdown of Banshee Stealer, highlighting its capabilities for credential theft and persistence. Read more.
FakeWallet Crypto Stealer in iOS App Store
Source: Kaspersky Securelist
(Published: 18 April 2026)
FakeWallet apps discovered in the iOS App Store are stealing cryptocurrency credentials from unsuspecting users. Read more.
Lumma Stealer Infection With Sectop RAT and ArechClient2
Source: SANS ISC
(Published: 19 April 2026)
A multi-stage infection chain involving Lumma Stealer deploys additional payloads including Sectop RAT and ArechClient2 for expanded compromise. Read more.
JanelaRAT Financial Threat in Latin America
Source: Kaspersky Securelist
(Published: 19 April 2026)
JanelaRAT is emerging as a financial malware threat targeting banking users across Latin America. Read more.
MOIS-Linked Threat Actor Campaign Evolution
Source: DomainTools
(Published: 20 April 2026)
DomainTools researchers track evolving campaigns linked to MOIS-associated threat actors targeting geopolitical and infrastructure objectives. Read more.
Supply Chain Attack Hits Vercel: User Data is Being Sold on BreachForums For $2M
Source: OX Security
(Published: 20 April 2026)
On April 19, 2026, Vercel, a web development platform that enables developers to host and scale websites, announced it was breached via a third party, Context AI, which was also breached. Read more.
Dark Storm Team and Middle East Cyber Conflict
Source: FalconFeeds
(Published: 21 April 2026)
The Dark Storm Team is actively participating in cyber operations tied to geopolitical tensions across the Middle East, targeting critical infrastructure. Read more.
GlassWorm goes native: New Zig dropper infects every IDE on your machine
Source: Aikido
(Published: 08 April 2026)
We have been tracking GlassWorm for over a year. Read more.
ClickFix technique uses Script Editor instead of Terminal on macOS
Source: Jamf
(Published: 08 April 2026)
Jamf Threat Labs discovered a ClickFix-style macOS attack that abuses the applescript:// URL scheme to launch Script Editor and deliver an Atomic Stealer infostealer payload – bypassing Terminal entirely. Read more.
MicroStealer and SparkStealer Credential Theft Infrastructure
Source: FalconFeeds
(Published: 09 April 2026)
Researchers uncovered a gaming-themed campaign distributing MicroStealer and SparkStealer malware through credential theft infrastructure. Read more.
Unholy Trinity: Werewolves Target Law Enforcers
Source: BI.ZONE
(Published: 10 April 2026)
A coordinated campaign dubbed “Unholy Trinity” is targeting law enforcement agencies using a combination of advanced malware and social engineering techniques. Read more.
Active Exploitation of Critical Adobe Prototype Pollution Vulnerability
Source: Hive Pro
(Published: 10 April 2026)
Threat actors are actively exploiting a critical Adobe prototype pollution vulnerability to execute arbitrary code in affected environments. Read more.
CPU-Z Trojan Delivers STX RAT and PureLogs Data Exfiltration
Source: Deception Pro
(Published: 11 April 2026)
A supply chain attack involving trojanized CPU-Z software installs STX RAT and PureLogs to exfiltrate sensitive data from infected systems. Read more.
Healthcare in the Crosshairs: Iran-Linked Cyber Threats
Source: PolySwarm
(Published: 12 April 2026)
Iran-linked cyber operations are increasingly targeting healthcare organizations and supply chains, raising risks across hospitals and medical infrastructure. Read more.
CyberAv3ngers Exploit Internet-Exposed PLCs in the US
Source: Hive Pro
(Published: 12 April 2026)
Iranian-affiliated CyberAv3ngers are targeting exposed PLC systems in the US to disrupt industrial control environments. Read more.
108 Chrome Extensions Linked to Data Exfiltration and Session Theft via Shared C2 Infrastructure
Source: Socket
(Published: 13 April 2026)
Socket’s Threat Research Team identified 108 malicious Chrome extensions operating as a coordinated campaign under a shared C2 infrastructure at `cloudapi[.]stream`. Read more.
Storm-2755 Payroll Fraud Campaign
Source: Hive Pro
(Published: 14 April 2026)
Storm-2755 is conducting a stealthy payroll diversion campaign targeting organizations in Canada. Read more.
The N8N N8mare Campaign
Source: Cisco Talos
(Published: 15 April 2026)
Threat actors are exploiting n8n automation workflows in a campaign dubbed N8mare to deploy malware and maintain persistence. Read more.
UAT-10362 Deploys LucidRook Malware
Source: Hive Pro
(Published: 15 April 2026)
UAT-10362 is deploying LucidRook malware in targeted attacks against Taiwanese non-governmental organizations. Read more.
CPU-Z Supply Chain Attack Delivers STX RAT
Source: CyberSec Sentinel
(Published: 16 April 2026)
A trojanized version of CPU-Z and HWMonitor software is being used to distribute STX RAT through a supply chain attack. Read more.
A Deep Dive Into Attempted Exploitation of CVE-2023-33538
Source: Unit 42 (Palo Alto Networks)
(Published: 16 April 2026)
Unit 42 researchers analyzed attempted exploitation of CVE-2023-33538 and linked the activity to botnet-style command injection campaigns targeting vulnerable WiFi routers. Read more.
Malicious dom-utils-lite NPM Package Installs SSH Backdoor
Source: SafeDep
(Published: 17 April 2026)
A malicious npm package installs an SSH backdoor, allowing attackers to maintain unauthorized access to compromised systems. Read more.
Lumma Stealer Infection With Sectop RAT and ArechClient2
Source: SANS ISC
(Published: 19 April 2026)
A multi-stage infection chain involving Lumma Stealer deploys additional payloads including Sectop RAT and ArechClient2 for expanded compromise. Read more.
MOIS-Linked Threat Actor Campaign Evolution
Source: DomainTools
(Published: 20 April 2026)
DomainTools researchers track evolving campaigns linked to MOIS-associated threat actors targeting geopolitical and infrastructure objectives. Read more.
Dark Storm Team and Middle East Cyber Conflict
Source: FalconFeeds
(Published: 21 April 2026)
The Dark Storm Team is actively participating in cyber operations tied to geopolitical tensions across the Middle East, targeting critical infrastructure. Read more.
Want more articles? Check out the previous edition of Security Signals here.
