Malware - Cybersec Sentinel

Malware

A collection of 143 posts

Fileless MixShell Malware Delivered Through Web Forms and Cloud Services

Fileless MixShell Malware Delivered Through Web Forms and Cloud Services

Threat Group: Unknown actor with possible overlaps to the UNK_GreenSec cybercriminal cluster Threat Type: Social engineering phishing campaign delivering a fileless, in memory backdoor Exploited Vulnerabilities: No software vulnerabilities exploited. The threat abuses web "Contact Us" forms, trusted cloud storage and user trust to bypass email gateways

Skype Delivered SCR and PIF Files Deploy GodRAT Malware in Financial Campaigns

Skype Delivered SCR and PIF Files Deploy GodRAT Malware in Financial Campaigns

Threat Group: Winnti (APT41) – suspected attribution based on code lineage and targeting Threat Type: Remote Access Trojan (RAT) Exploited Vulnerabilities: Social engineering via Skype delivering malicious .SCR and .PIF files containing steganographic shellcode in JPEGs and DLL sideloading Malware Used: GodRAT – evolution of Gh0st RAT and AwesomePuppet, featuring plugin-based architecture

PXA Stealer Malware Uses Trusted Cloud Services to Exfiltrate Government and Education Credentials

PXA Stealer Malware Uses Trusted Cloud Services to Exfiltrate Government and Education Credentials

Threat Group: Vietnamese-speaking cybercrime actors (possible overlap with CoralRaider) Threat Type: Python-based Information Stealer (Infostealer) Exploited Vulnerabilities: DLL sideloading, phishing ZIP archives, abuse of legitimate cloud services (Cloudflare Workers, Dropbox) Malware Used: PXA Stealer Threat Score: 🔥 Critical (9.0/10) – Due to advanced evasion, large-scale credential theft, and abuse of

Gamaredon Revives Remcos RAT in Fileless LNK Shortcut Attacks

Gamaredon Revives Remcos RAT in Fileless LNK Shortcut Attacks

$Threat Group: Gamaredon (a.k.a. Primitive Bear, UAC‑0010/UAC‑0184, Hive0156) Threat Type: Remote Access Trojan (RAT) Exploited Vulnerabilities: LNK shortcut execution, mshta abuse, PowerShell scripting, DLL sideloading Malware Used: Remcos RAT v6.0.0 Pro Threat Score: 🔴 High (7.5/10) – Due to fileless in-memory execution, sophisticated

Koske AI generated malware hides in panda images to mine cryptocurrency

Koske AI generated malware hides in panda images to mine cryptocurrency

Koske AI generated malware hides in panda images to mine cryptocurrency Threat actor: Unknown – opportunistic attackers exploiting misconfigured JupyterLab servers Threat type: AI‑assisted Linux malware for cryptomining Exploited weakness: Unauthenticated and misconfigured JupyterLab server exposure Malware used: Koske (rootkit and shell script), with associated miners such as ccminer Last

SquidLoader Reemerges with Stealth Upgrades in APAC Financial Attacks

SquidLoader Reemerges with Stealth Upgrades in APAC Financial Attacks

Threat Group: Unknown (APT-level sophistication suspected) Threat Type: Loader / Malware-as-a-Service (MaaS) Exploited Vulnerabilities: No specific CVE; exploits social engineering and security evasion Malware Used: SquidLoader, Cobalt Strike Beacon Threat Score: 🔴 High (8.4/10) – Highly evasive loader, zero-detection rate at launch, APT-style tradecraft, and persistent access via Cobalt Strike Last

CVE-2025-53770 and CVE-2025-53771 Abused in Active Attacks on On-Prem SharePoint

Vulnerabilities

CVE-2025-53770 and CVE-2025-53771 Abused in Active Attacks on On-Prem SharePoint

Threat Group: Linen Typhoon, Violet Typhoon, Storm-2603 Threat Type: Remote Code Execution & Spoofing Exploited Vulnerabilities: CVE-2025-53770 (RCE), CVE-2025-53771 (Spoofing) Malware Used: ToolShell (spinstall0.aspx) Threat Score: 🔴 High (8.0/10) – Active exploitation by nation-state actors, persistent access via cryptographic theft, and potential lateral movement across enterprise networks. Last Threat

Matanbuchus 3.0 Campaign Exploits Quick Assist and Teams for Initial Access

Matanbuchus 3.0 Campaign Exploits Quick Assist and Teams for Initial Access

Threat Group: ShadowSyndicate Threat Type: Malware Loader / Malware-as-a-Service (MaaS) Exploited Vulnerabilities: Social engineering of Microsoft Teams and Quick Assist trust Malware Used: Matanbuchus 3.0 Threat Score: ⛔ High (7.5/10) – Due to its advanced evasion capabilities, stealthy deployment, abuse of collaboration tools, and targeting of high-value enterprise environments. Last

Scattered Spider Shifts to Aviation, Retail, and Transport in Latest Campaigns

Scattered Spider Shifts to Aviation, Retail, and Transport in Latest Campaigns

Threat Group: Scattered Spider Threat Type: Cybercrime Group (Focused on Cloud Environments, Ransomware) Exploited Vulnerabilities: Azure Cross-Tenant Synchronization, Federated Identity Providers, Cloud Platforms Malware Used: AlphV ransomware, Spectre RAT Threat Score: 🔴 High (8.8/10) – Due to its sophisticated exploitation of cloud-based systems, privilege escalation methods, and use of advanced