Detections

Explore public detection logic contributed by the community across SIEM and rule languages.

2,918 detections

This rule detects the presence of files matching known SHA256 hashes associated with the GhostCode phishing kit. It monitors for these files both in email attachments and on local device filesystems to identify potential delivery and execution of malicious phishing payloads.
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Ankit Mehta@Secvyn
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Detections.ai Community
2 months ago
003
This rule detects shell processes (sh or bash) being spawned from suspicious, commonly writable directories (e.g., /tmp, /dev/shm) within a short window of file system activity (creation, modification, or deletion) and associated MQTT protocol network communication. This pattern is indicative of potential malware staging or command-and-control activity on Linux systems.
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Ankit Mehta@Secvyn
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Detections.ai Community
2 months ago
304
Detects PowerShell command execution patterns indicative of the VelvetCake malware module. The rule identifies scripts that enumerate files within the C:\Users\Public directory, calculate file metrics using [math]::Round, and stage discovered files for transmission over a raw TCP connection using System.Net.Sockets.TcpClient.
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Ibrahim Saud@tektrix
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Detections.ai Community
1 month ago
000
Detects the loading of 'libcurl.dll' or related DLL patterns from suspicious directories such as '\Microsoft\Crypto\RuntimeBroker\', often associated with process masquerading or side-loading activities. The rule also monitors for the execution of suspicious binaries ('Tax_Notice_45594.exe') or binaries that mimic 'Notepad++' metadata from within these paths.
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Ankit Mehta@Secvyn
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Detection & Hunting Community
2 months ago
403
Detects the execution of suspicious image files (often masquerading as lures) using explorer.exe from the user Downloads directory. This is a common pattern for launching malicious payloads delivered via phishing.
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Ankit Mehta@Secvyn
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Detections.ai Community
2 months ago
003
Detects rapid deletion and creation cycles of the WD_SCAN object manager link, a behavioral pattern associated with a Time-of-Check-to-Time-of-Use (TOCTOU) exploit chain targeting Windows Defender (referenced as CVE-2026-69414). The rule monitors for at least three cycle events occurring within a 5-second window, specifically involving the 'WD_SCAN' object identifier.
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Arnold Chan@slaz
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Hunters
2 months ago
509
This rule monitors file events to detect the presence of known malicious files based on their SHA256 or MD5 file hashes.
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Ankit Mehta@Secvyn
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Detections.ai Community
1 month ago
000
Detects the presence of known file hashes associated with Vectra Remote Access Trojan (RAT). The rule monitors both file creation/existence events and process execution events where the SHA256 hash matches the identified indicators of compromise.
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Arnold Chan@slaz
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Detection & Hunting Community
2 months ago
305
This rule monitors for known malicious file hashes, IP addresses, C2 domains, and specific URL markers associated with identified threat activity. It consolidates multiple detection vectors including file activity, process execution, network connections, and DNS queries to identify compromised devices communicating with attacker-controlled infrastructure.
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Arnold Chan@slaz
Defender - KQL
1 month ago
001
Detects unauthorized access attempts to browser credential files (such as Login Data, key4.db, and cookies) by non-browser processes. This behavior is indicative of the Rapuncel infostealer, which harvests stored browser credentials after attempting to disable or bypass security solutions.
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Ibrahim Saud@tektrix
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Detections.ai Community
1 month ago
001
Detects unauthorized access attempts to browser credential files (such as Login Data, key4.db, and cookies) by non-browser processes. This behavior is indicative of the Rapuncel infostealer, which harvests stored browser credentials after attempting to disable or bypass security solutions.
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Ibrahim Saud@tektrix
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Detections.ai Community
1 month ago
001
Detects unauthorized access to critical browser files such as cookies, login data, and local state files. These files contain sensitive information such as authentication cookies and stored credentials, which are primary targets for infostealer malware.
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Ibrahim Saud@tektrix
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Detections.ai Community
1 month ago
101
Detects the presence of known malicious RubyGems package names and Cross-Site Scripting (XSS) payloads within process commands, file paths, or network URLs, indicative of an attempt to target repository registries or administrative interfaces with supply chain injection attacks.
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Ankit Mehta@Secvyn
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Detections.ai Community
2 months ago
103
Detects the Kimsuky second-stage payload test.bef_fri which masquerades as an RTF file via a falsified RTF header before header repair and decompression
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Arnold Chan@slaz
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Midnight Slayer
1 month ago
002
Detects the Kimsuky second-stage payload test.bef_fri which masquerades as an RTF file via a falsified RTF header before header repair and decompression
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Arnold Chan@slaz
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Detection & Hunting Community
1 month ago
002
Detects the Kimsuky second-stage payload test.bef_fri which masquerades as an RTF file via a falsified RTF header before header repair and decompression
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Arnold Chan@slaz
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Detections.ai Community
1 month ago
002
Detects the Kimsuky trojanized .NET installer OrionQuests-Setup.exe that decrypts embedded AES resource OrionSetup.payload.enc to drop a decoy OrionLauncher installer and malicious LNK file
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Arnold Chan@slaz
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Midnight Slayer
1 month ago
002
Detects the Kimsuky trojanized .NET installer OrionQuests-Setup.exe that decrypts embedded AES resource OrionSetup.payload.enc to drop a decoy OrionLauncher installer and malicious LNK file
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Arnold Chan@slaz
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Hunters
1 month ago
002
Detects the Kimsuky trojanized .NET installer OrionQuests-Setup.exe that decrypts embedded AES resource OrionSetup.payload.enc to drop a decoy OrionLauncher installer and malicious LNK file
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Arnold Chan@slaz
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Detection & Hunting Community
1 month ago
002
Detects the execution or file activity associated with the 'OrionQuests-Setup.exe' installer. This rule monitors both process creation and file system activity to track the presence and usage of this specific installer executable, which may indicate the installation of potentially unauthorized or untrusted software.
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Arnold Chan@slaz
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Detection & Hunting Community
1 month ago
002
Detects the execution or file activity associated with the 'OrionQuests-Setup.exe' installer. This rule monitors both process creation and file system activity to track the presence and usage of this specific installer executable, which may indicate the installation of potentially unauthorized or untrusted software.
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Arnold Chan@slaz
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Midnight Slayer
1 month ago
002
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