Tim Peck
@timpeckTrusted contributorCompletionist
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919 detections
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This rule detects network traffic indicative of Kraken Ransomware activity, specifically looking for connections to Cloudflared tunnels. It identifies TLS SNI (Server Name Indication) containing '.trycloudflare.com', which is a domain used by Cloudflare for its tunnel services. This behavior is often leveraged by adversaries for command and control or data exfiltration, as it can help bypass traditional firewall rules and obscure the true destination of the traffic.
Detects FileFix campaigns that use clipboard manipulation functions in web pages to deliver malicious PowerShell commands. These campaigns often trick users into copying and executing payloads, sometimes involving steganography with image files.
Detects the macOS Script Editor (`Script Editor.app`) launching child processes or initiating network connections. This behavior can indicate the execution of a malicious AppleScript used to download secondary payloads or execute arbitrary commands, as seen in campaigns delivering stealers like MacSync and Odyssey.
This rule detects network traffic to specific JSON storage services (jsonkeeper.com, jsonsilo.com, npoint.io) that have been observed to be abused by the DPRK-linked 'Contagious Interview' threat actors for malware delivery. The detection is based on TLS Server Name Indication (SNI) patterns.
Detects execution of Node.js from unusual locations or associated with network connections to known C2 infrastructure, as seen in campaigns distributing backdoors disguised as legitimate software.
Detects the creation and subsequent hidden execution of a batch file, a technique used by XWorm to stage malicious code. The rule looks for a .bat file created in a temporary or user profile directory, which is then immediately run invisibly using the 'cmd /c start "" /min' command.
Detects phishing emails with malicious HTML attachments designed to harvest credentials and exfiltrate them via the Telegram Bot API. The detection looks for specific attachment filenames (e.g., RFQ, INQUIRY) or content patterns indicative of this threat.
Detects the use of the AADInternals PowerShell module, a tool used by threat actors like MERCURY and DEV-1084 for credential theft and privilege escalation in Azure AD environments.
Detects attempts to load unsigned kernel extensions, which may indicate rootkit installation or malicious kernel-level access. All legitimate kernel extensions should be signed with a developer ID.
Detects the use of PuTTY Link (plink.exe) with command-line arguments indicative of SSH tunneling, executed from a suspicious file path. This technique is used by the xHunt APT group for lateral movement and to create covert communication channels.
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