Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects ProFTPD FTP server commands where an adversary uses SITE CPFR (Copy From) to reference a sensitive file path (such as /etc/passwd or SSH keys) followed by SITE CPTO (Copy To) on the same host within a 10-minute window, which indicates potential staging or unauthorized copying of sensitive system files via FTP.
Detects a web server process (apache2, httpd, php-fpm) spawning a Unix shell (dash/sh) that executes discovery commands such as id, whoami, hostname, or find. This is the durable post-exploitation signature of the wp2shell WordPress pre-auth RCE chain (CVE-2026-63030, CVE-2026-60137), where a malicious plugin or webshell executes commands through the web stack.
Detects repeated Ollama warning-level network errors, such as DNS lookup failures, TCP connection issues, or host resolution problems. These events can indicate a connectivity issue and warrant investigation, but do not by themselves establish unauthorized access or reconnaissance.
Detects a sequence where a FortiSIEM-related process writes or modifies a shell script in a cron or phoenix directory, followed closely within 2 minutes by a child process spawned by cron executing that same written script file.
Detects repeated PHP memory exhaustion (OOM) errors combined with segmentation faults or session warnings within a short timeframe, which may indicate application instability, resource exhaustion attacks, or exploitation attempts.
Detects web servers (httpd, apache2, nginx, php-fpm) or Request Tracker (RT) Perl worker processes spawning suspicious child processes such as shells, downloaders, netcat, or Python interpreters, indicative of post-exploitation or web application compromise.
Detects a sequence of FTP SITE CPFR (Copy From) followed by SITE CPTO (Copy To) commands from the same source IP and computer within 5 minutes, which can be abused to copy files on the server.
Detects configuration changes on the Zimbra server. Mail server configuration
controls routing, authentication and logging; a change can create a delivery path,
weaken authentication, or stop the server recording what happens next.
Onboarding: ZIMBRA is ingested via Syslog (Bloo extractor 123).
Integration guide: https://bloo.io/docs/hypercloud/syslog-connector
BQL (Bloo Query Language):
stream=configuration where sourcename='ZIMBRA' and action='CONFIGURATION_CHANGED'
| groupby user, config
controls routing, authentication and logging; a change can create a delivery path,
weaken authentication, or stop the server recording what happens next.
Onboarding: ZIMBRA is ingested via Syslog (Bloo extractor 123).
Integration guide: https://bloo.io/docs/hypercloud/syslog-connector
BQL (Bloo Query Language):
stream=configuration where sourcename='ZIMBRA' and action='CONFIGURATION_CHANGED'
| groupby user, config
Detects the creation of WordPress administrator accounts using MySQL or WP-CLI command-line tools on hosts, specifically looking for specific username prefixes or email domains associated with suspicious activities.
Detects coordinated malicious activity on VMware ESXi hosts indicative of ransomware attacks. The rule correlates multiple suspicious events within a 10-minute window, including the appearance of known ESXi ransom notes/banners, mass datastore file renames or encryption extensions, virtual machine stop events, and snapshot deletions designed to prevent recovery.
Detects virtualization management monitor (VMM) processes such as QEMU or Firecracker directly spawning an interactive shell, script interpreter, or network utility as the root user. This behavior is highly anomalous and may indicate a guest-to-host escape leading to remote code execution on the host.
Detects a privileged command run through Centrify on Linux. Because elevation is
brokered, the platform records what was actually executed under elevated rights —
a cleaner record of privileged activity than shell history, which the user can edit.
Onboarding: CENTRIFY-AUDITTRAIL-LINUX is ingested via Syslog (KV) (Bloo extractor 822).
Integration guide: https://bloo.io/docs/hypercloud/syslog-connector
BQL (Bloo Query Language):
stream=iam where sourcename='CENTRIFY-AUDITTRAIL-LINUX'
and action='USER_COMMAND_EXECUTED'
| groupby user, targetuser, role, domain
brokered, the platform records what was actually executed under elevated rights —
a cleaner record of privileged activity than shell history, which the user can edit.
Onboarding: CENTRIFY-AUDITTRAIL-LINUX is ingested via Syslog (KV) (Bloo extractor 822).
Integration guide: https://bloo.io/docs/hypercloud/syslog-connector
BQL (Bloo Query Language):
stream=iam where sourcename='CENTRIFY-AUDITTRAIL-LINUX'
and action='USER_COMMAND_EXECUTED'
| groupby user, targetuser, role, domain
Detects potential unauthorized or suspicious configuration changes related to packet sniffer objects and associated authentication or management ports on FortiGate firewalls across multiple devices.
Detects creation or modification of cron entries on the BeyondTrust
Remote Support / Privileged Remote Access appliance. After exploiting the pre-auth
vulnerability, attackers establish recurring execution for persistence and C2
beaconing via cron (T1053.003) on the Linux-based appliance.
Follows CISA's urgent patch advisory for BeyondTrust appliances.
Remote Support / Privileged Remote Access appliance. After exploiting the pre-auth
vulnerability, attackers establish recurring execution for persistence and C2
beaconing via cron (T1053.003) on the Linux-based appliance.
Follows CISA's urgent patch advisory for BeyondTrust appliances.
Detects process execution where a shell (such as bash, zsh, cmd, or powershell) is spawned by a skill or openclaw process, and subsequently performs download activities (e.g., using curl, wget, invoke-webrequest) or establishes persistence (e.g., via cron, systemd, registry run keys, schtasks).
Detects a privilege change recorded by Centrify on a Linux server. Centrify brokers
privileged access to Unix estates, so it sees elevation decisions that native auditd
may record only partially — and in many estates it is the only consistent record
across heterogeneous Linux and AIX systems.
Onboarding: CENTRIFY-AUDITTRAIL-LINUX is ingested via Syslog (KV) (Bloo extractor 822).
Integration guide: https://bloo.io/docs/hypercloud/syslog-connector
BQL (Bloo Query Language):
stream=iam where sourcename='CENTRIFY-AUDITTRAIL-LINUX'
and action='PRIVILEGE_CHANGED'
| groupby user, targetuser, role, domain
privileged access to Unix estates, so it sees elevation decisions that native auditd
may record only partially — and in many estates it is the only consistent record
across heterogeneous Linux and AIX systems.
Onboarding: CENTRIFY-AUDITTRAIL-LINUX is ingested via Syslog (KV) (Bloo extractor 822).
Integration guide: https://bloo.io/docs/hypercloud/syslog-connector
BQL (Bloo Query Language):
stream=iam where sourcename='CENTRIFY-AUDITTRAIL-LINUX'
and action='PRIVILEGE_CHANGED'
| groupby user, targetuser, role, domain
Detects a system shell interpreter being spawned directly by a Celery worker process.
This behavior indicates a Python background task execution framework is evaluating raw string input through a shell execution context,
which is highly indicative of successful command or prompt injection exploitation against an LLM agent task.
This behavior indicates a Python background task execution framework is evaluating raw string input through a shell execution context,
which is highly indicative of successful command or prompt injection exploitation against an LLM agent task.
The following analytic detects the modification of SSH Authorized Keys on Linux systems. It leverages process execution data from Endpoint Detection and Response (EDR) agents, specifically monitoring commands like "bash" and "cat" interacting with "authorized_keys" files. This activity is significant as adversaries often modify SSH Authorized Keys to establish persistent access to compromised endpoints. If confirmed malicious, this behavior could allow attackers to maintain unauthorized access, bypassing traditional authentication mechanisms and potentially leading to further exploitation or data exfiltration.
Detects the use of system utilities (wevtutil, PowerShell, wmic, etc.) or log-reading tools (grep, tail) for log enumeration or export when executed by processes that are not standard management or monitoring agents. This pattern is commonly associated with adversary efforts to gain situational awareness or identify security logs.
Detects the use of curl or wget commands targeting the Cloud Instance Metadata Service (IMDS) at 169.254.169.254 for credential theft, or performing file uploads and data exfiltration patterns.
Detects potential exploitation of a SAML-related vulnerability in Citrix NetScaler appliances by correlating a surge in SAML authentication traffic to Gateway/AAA endpoints followed by application crashes or core dumps on the device. This behavioral pattern is indicative of a crash-inducing exploitation attempt targeting SAML processing.
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