Detections

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

2,294 detections

Detects modification of PAM configuration files allowing authentication bypass
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Darshan Thummar@Mighty
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Detections.ai Community
5 months ago
006
Detects when non-Node.js scripts, specifically Python or Bash/Shell, modify or create a 'package.json' file. This activity can indicate an attempt to silently inject malicious dependencies into clean repositories, a technique observed with malware like Miasma.
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Ibrahim Saud@tektrix
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Detections.ai Community
5 months ago
002
Detects the creation or modification of 'gh-token-monitor.sh', a script identified as part of the Miasma toolkit, used for harvesting developer credentials. This script's presence or alteration on a system indicates potential credential access attempts.
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Ibrahim Saud@tektrix
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Detections.ai Community
5 months ago
002
Detects modifications to user profile scripts (.profile, .bash_profile) that inject 'gh-token-monitor' or 'spectralviper' to establish persistence upon user login.
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Ibrahim Saud@tektrix
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Detections.ai Community
5 months ago
002
This rule detects an unusual number of file creations or modifications (5 or more within an hour) of executable (.exe) or dynamic link library (.dll) files within folders containing 'build' or 'release' in their path. This activity could indicate software deployment, compilation, or potentially malicious activity such as the staging of malicious executables or libraries.
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Ankit Mehta@Secvyn
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Detections.ai Community
5 months ago
006
Detects modification of SSH authorized_keys files for backdoor access
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Darshan Thummar@Mighty
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Detections.ai Community
5 months ago
103
Detects files with suspicious double extensions (e.g., .exe.txt, .dll.txt) or .scr extension, which can indicate an attempt to masquerade malicious executables or scripts as benign text files or screensavers. The rule excludes files in the System32 directory to reduce false positives.
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Ankit Mehta@Secvyn
Bharat Cyber Guardians
5 months ago
102
Detects the creation or modification of files with specific names known to be associated with Advanced Persistent Threat (APT) groups. This rule identifies potential APT activity by monitoring for the presence of these highly suspicious file names on endpoints.
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Ankit Mehta@Secvyn
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Detections.ai Community
5 months ago
002
This rule detects attempts to bypass macOS Gatekeeper by removing the 'com.apple.quarantine' extended attribute from downloaded files. It specifically looks for HTTP responses containing the string 'com.apple.quarantine' in the file data, indicating a potential attempt to modify or remove this attribute during or after a download.
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Darshan Thummar@Mighty
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Detections.ai Community
5 months ago
009
Detects modification of domain controller authentication packages
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Darshan Thummar@Mighty
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Detections.ai Community
5 months ago
004
Detects malicious code written to PowerShell profile scripts
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Darshan Thummar@Mighty
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Detections.ai Community
5 months ago
002
Detects modification of Group Policy Objects for privilege escalation
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Darshan Thummar@Mighty
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Detections.ai Community
5 months ago
002
This rule detects when a single process account initiates a high volume (10 or more) of file move operations to folders associated with cloud storage services (e.g., 'cloud', 'dropbox', 'drive') within a one-hour window. This behavior could indicate data exfiltration or staging for exfiltration.
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Ankit Mehta@Secvyn
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Detections.ai Community
5 months ago
005
Detects instances where the Windows COM surrogate (DllHost.exe) writes executable files or scripts to user-writable/temp directories. This proxy file-write behavior indicates potential WSL2 payload staging that bypasses network telemetry.
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Ethan Andrews@eandrews
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Federal Signal Detections
5 months ago
5018
This rule detects attempts to modify the end-of-file marker on a network share, specifically looking for the 'SetEndOfFile' operation over SMB. This activity can be indicative of an attacker manipulating file sizes or content on shared resources, potentially as part of data staging or to evade detection. The rule is configured with a threshold to alert on 20 such events from the same source within 30 seconds, aiming to reduce noise from legitimate, infrequent operations.
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Darshan Thummar@Mighty
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Detections.ai Community
5 months ago
007
Detects Master Boot Record overwrite for disk wiping attacks
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Darshan Thummar@Mighty
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Detections.ai Community
5 months ago
003
This rule detects when a single process rapidly creates or modifies three or more YAML files (files ending with '.yaml' or '.yml') within an hour. It specifically looks for these activities in paths containing 'config' or 'pipeline', which could indicate configuration changes, deployment activities, or potential malicious manipulation of system or application settings.
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Ankit Mehta@Secvyn
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Detections.ai Community
5 months ago
004
This rule detects when a single process account initiates a high volume (10 or more) of file move operations to folders associated with cloud storage services (e.g., 'cloud', 'dropbox', 'drive') within a one-hour window. This behavior could indicate data exfiltration or staging for exfiltration.
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Ankit Mehta@Secvyn
Bharat Cyber Guardians
5 months ago
004
Detects tampering with 'binding.gyp' files by processes other than 'npm', 'node', or 'yarn'. Modifying these build scripts can allow attackers to achieve arbitrary code execution during the 'npm install' phase, indicating a potential supply chain compromise.
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Ibrahim Saud@tektrix
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Detections.ai Community
5 months ago
001
Identifies the creation or execution of the specific JavaScript file named 'Remittance Advice.js' used in the initial access phase of the Evil MSI Background steganography campaign.
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Ethan Andrews@eandrews
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Federal Signal Detections
5 months ago
4011
Detects the creation or modification of suspicious web-related script files (PHP, ASPX, JSP, SHTML) in common web server directories, excluding activities from legitimate web server processes. This rule aims to identify potential webshell deployment or other post-exploitation activities, specifically linked to APT28's targeting of Roundcube webmail servers.
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Ibrahim Saud@tektrix
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Detections.ai Community
5 months ago
001
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