Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects download of malware source code from code repositories
Detects the execution of `wget` or `curl` commands that also contain keywords like `execute` or `eval` in the command line. This combination can indicate an attempt to download and immediately execute malicious code or scripts, often associated with initial access or persistence mechanisms. The rule aggregates these events by computer and account over a one-hour period and triggers if three or more such events occur.
This rule detects processes making a high number of successful network connections (10 or more within an hour) to known public container registries such as docker.io or quay.io. This activity could indicate legitimate containerization operations, but also potential malicious activity like downloading malicious container images as part of a supply chain attack, or ingress of tools.
This rule detects processes making a high volume of successful network connections (3 or more within an hour) to domains containing 'codeartifact' or 'artifactory'. This behavior could indicate an attempt to download tools, libraries, or other artifacts, potentially as part of an ingress tool transfer or supply chain attack.
Bun Runtime Remote Download
Cortex XDR
Detects network connections downloading the Bun runtime from the oven-sh GitHub repository, a behavior exhibited by the Hades loader. This rule specifically looks for HTTP network events where the URL contains 'github.com' and 'oven-sh/bun/releases/download', indicating an attempt to download the Bun runtime.
Detects network connections from PowerShell or script interpreters to specific Cloudflare Workers or R2 infrastructure observed hosting steganographic payloads, associated with the 'Evil MSI Background campaign'. This rule identifies attempts to download malicious content from known adversary-controlled Cloudflare resources.
Detects Python or curl downloading payloads from the PySoxy staging IP 206.206.103.106. This indicates potential ingress tool transfer or staging activity by an adversary.
This rule looks for a package writing a short-lived JavaScript file with a p-prefix name in temp during install. That pattern matches known stealers and wipers. Quarantine the package version. Ask the person who used the computer whether they installed new software or clicked a link, and involve your security team if the answer is unclear.
This rule detects the execution of Living Off The Land Binaries (LOLBins) such as certutil.exe, msiexec.exe, regsvcs.exe, regasm.exe, rundll32.exe, cscript.exe, and wscript.exe, when their command lines contain keywords indicative of malicious activity like 'download', 'encode', 'decode', 'http', 'ftp', or 'javascript'. It specifically filters out executions originating from explorer.exe or svchost.exe to reduce false positives and triggers when two or more such events occur within an hour on the same computer by the same user.
This rule detects command-line executions that involve downloading content from the internet and immediately executing it. It specifically looks for `SecurityEvent` with `EventID 4688` (process creation) where the `CommandLine` contains keywords associated with web client operations (`IEX(New-Object Net.WebClient)`, `DownloadString`, `DownloadFile`, `Invoke-WebRequest`, `curl.exe`) and also contains terms indicating a download and execute intent (`http`, `payload`, `execute`). This pattern is commonly used by adversaries for initial access, execution, and persistence.
Detects the use of curl to download files from Telegram to local temp folder, which may indicate initial malware staging.
Identifies the creation of PowerShell or batch files in unusual ProgramData subdirectories by command-line interpreters, which may indicate malware staging or persistence preparation.
Detects users clicking malicious links that result in malware payload downloads
Detects the anomalous download of the Bun JavaScript runtime during npm/node-gyp installation phases. The Miasma malware uses a standalone Bun runtime to execute its obfuscated payloads outside of standard Node.js security tooling contexts to evade monitoring.
Detects downloads of CVE exploit proof-of-concept code
This rule detects processes making a high volume of successful network connections (3 or more within an hour) to domains containing 'codeartifact' or 'artifactory'. This behavior could indicate an attempt to download tools, libraries, or other artifacts, potentially as part of an ingress tool transfer or supply chain attack.
Detects the execution of `wget` or `curl` commands that also contain keywords like `execute` or `eval` in the command line. This combination can indicate an attempt to download and immediately execute malicious code or scripts, often associated with initial access or persistence mechanisms. The rule aggregates these events by computer and account over a one-hour period and triggers if three or more such events occur.
This rule detects processes making a high number of successful network connections (10 or more within an hour) to known public container registries such as docker.io or quay.io. This activity could indicate legitimate containerization operations, but also potential malicious activity like downloading malicious container images as part of a supply chain attack, or ingress of tools.
Detects network connections to a specific malicious GitHub raw URL path used by Miasma to download 5th and 6th stage payloads. This rule specifically targets the URL 'raw.githubusercontent.com/letsgo0/sayyadina-phibian-159'.
Detects download of software updates containing embedded malicious payloads
This rule detects the installation of Deno via Windows Package Manager (winget.exe) when initiated by common scripting or installer processes (powershell.exe, cmd.exe, msiexec.exe). This activity is indicative of a potential attack where a fake application might have been executed, leading to the quiet setup of Deno, which can then be used as a Remote Access Trojan (RAT). The rule specifically looks for 'winget.exe' executing with 'install' and 'Deno' in its command line, initiated by the specified processes.
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