Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
98 detections
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Detects a sequence of events on a single device where a shell (/bin/sh, /bin/bash, etc.) is copied to a path involving /usr/bin/dbus-authd using cp or busybox, followed by changing ownership to root, and subsequently setting the SUID permission bit within a 10-minute window.
Detects a sequence of events on a single device where a shell (/bin/sh, /bin/bash, etc.) is copied to a path involving /usr/bin/dbus-authd using cp or busybox, followed by changing ownership to root, and subsequently setting the SUID permission bit within a 10-minute window.
Detects a sequence of events on a single device where a shell (/bin/sh, /bin/bash, etc.) is copied to a path involving /usr/bin/dbus-authd using cp or busybox, followed by changing ownership to root, and subsequently setting the SUID permission bit within a 10-minute window.
Detects a sequence of events on a single device where a shell (/bin/sh, /bin/bash, etc.) is copied to a path involving /usr/bin/dbus-authd using cp or busybox, followed by changing ownership to root, and subsequently setting the SUID permission bit within a 10-minute window.
Detects a sequence of events on a single device where a shell (/bin/sh, /bin/bash, etc.) is copied to a path involving /usr/bin/dbus-authd using cp or busybox, followed by changing ownership to root, and subsequently setting the SUID permission bit within a 10-minute window.
This rule monitors NetScaler ADC logs for indicators associated with the PitScaler campaign, specifically targeting exploitation of CVE-2026-88771 and CVE-2026-88772. It detects exploitation artifacts (DTLS handshake errors, NSPPE crashes), deployment of WHIPSHOT/SLAPSHOT malware, web shell installation, httpd.conf configuration tampering, persistence mechanisms involving privilege escalation (chmod), and connections to known malicious infrastructure.
This rule detects indicators of the PitScaler campaign targeting Citrix NetScaler ADC and Gateway appliances, exploiting vulnerabilities (CVE-2026-88771, CVE-2026-88772). It identifies the full attack chain including initial DTLS heap corruption exploitation, WHIPSHOT web shell C2 patterns, SLAPSHOT tunneling artifacts, web shell deployment files, httpd.conf PHP configuration tampering for persistence, privilege escalation via setuid /bin/sh modification, and anti-forensic log tampering.
Detects suspicious post-exploitation behaviors on Citrix NetScaler appliances, specifically tracking the modification of file permissions to grant setuid/setgid bits to the shell and the termination of httpd processes often associated with webshell persistence or manipulation.
This rule monitors NetScaler ADC logs for indicators associated with the PitScaler campaign, specifically targeting exploitation of CVE-2026-88771 and CVE-2026-88772. It detects exploitation artifacts (DTLS handshake errors, NSPPE crashes), deployment of WHIPSHOT/SLAPSHOT malware, web shell installation, httpd.conf configuration tampering, persistence mechanisms involving privilege escalation (chmod), and connections to known malicious infrastructure.
This rule detects indicators of the PitScaler campaign targeting Citrix NetScaler ADC and Gateway appliances, exploiting vulnerabilities (CVE-2026-88771, CVE-2026-88772). It identifies the full attack chain including initial DTLS heap corruption exploitation, WHIPSHOT web shell C2 patterns, SLAPSHOT tunneling artifacts, web shell deployment files, httpd.conf PHP configuration tampering for persistence, privilege escalation via setuid /bin/sh modification, and anti-forensic log tampering.
Detects a system shell/interpreter copied or moved into a writable or non-standard path -
the precursor to the 'copy /bin/bash, set SUID, run bash -p' misconfiguration abuse and a
common staging step in the page-cache PoCs. Enriched with source/destination decode, an
inline-SUID-intent flag (chmod +s / chmod 4755 / install -m / setcap in the same command),
masquerade flags (renamed, hidden dotfile, system-lookalike name), a weighted RiskScore /
TriagePriority and DeviceInfo context. Pairs with OS-DET-LNX-006 and correlation
OS-DET-LNX-007. Detection logic adapted from Elastic Security Labs.
the precursor to the 'copy /bin/bash, set SUID, run bash -p' misconfiguration abuse and a
common staging step in the page-cache PoCs. Enriched with source/destination decode, an
inline-SUID-intent flag (chmod +s / chmod 4755 / install -m / setcap in the same command),
masquerade flags (renamed, hidden dotfile, system-lookalike name), a weighted RiskScore /
TriagePriority and DeviceInfo context. Pairs with OS-DET-LNX-006 and correlation
OS-DET-LNX-007. Detection logic adapted from Elastic Security Labs.
This rule monitors for Linux web-server service accounts (such as www-data or nginx) attempting to elevate privileges by modifying file permissions to set SUID/SGID bits or by executing common system binaries with shell-escape patterns commonly documented in GTFOBins for privilege escalation.
High-fidelity correlation of OS-DET-LNX-005 and OS-DET-LNX-006: a system shell copied to a
non-standard/writable path, followed within 15 minutes on the same host by execution of a
shell with the privilege-preserving -p flag from a non-standard path. The two events
together are a near-certain SUID-root shell misconfiguration abuse (bash -p to root) and a
lower-FP signal than either component alone. Detection logic adapted from Elastic Security Labs.
non-standard/writable path, followed within 15 minutes on the same host by execution of a
shell with the privilege-preserving -p flag from a non-standard path. The two events
together are a near-certain SUID-root shell misconfiguration abuse (bash -p to root) and a
lower-FP signal than either component alone. Detection logic adapted from Elastic Security Labs.
Detects a shell launched with the privilege-preserving -p flag from a location outside the
standard binary directories - the execution step that converts a SUID-root shell copy into
an interactive root shell. Pairs directly with OS-DET-LNX-005 (see correlation
OS-DET-LNX-007). Detection logic adapted from Elastic Security Labs.
standard binary directories - the execution step that converts a SUID-root shell copy into
an interactive root shell. Pairs directly with OS-DET-LNX-005 (see correlation
OS-DET-LNX-007). Detection logic adapted from Elastic Security Labs.
Detects anomalous process execution where a non-privileged process spawns a child process with root/SYSTEM (uid 0) privileges without passing through recognized elevation binaries (e.g., sudo, su, pkexec). This behavior is consistent with post-exploitation privilege escalation techniques, such as exploiting hijacked file descriptors or callback structures to gain root authority.
Detects anomalous process execution where a non-privileged process spawns a child process with root/SYSTEM (uid 0) privileges without passing through recognized elevation binaries (e.g., sudo, su, pkexec). This behavior is consistent with post-exploitation privilege escalation techniques, such as exploiting hijacked file descriptors or callback structures to gain root authority.
Detects the execution of Acronis backup-related processes by a non-root user while the process is running with root-level privileges (UID 0). This pattern indicates potential privilege escalation or abuse of existing backup utilities to run with elevated permissions in a context where they should not be.
Detects processes associated with Acronis backup software executed by a user other than 'root', while the effective user context of the process is 'root'. This behavior often indicates an attempt to exploit setuid binaries or misconfigured permissions to execute commands with elevated privileges.
This rule detects potential privilege escalation to root originating from Acronis backup plugin processes on hosting platforms like cPanel, WHM, and Plesk. It flags cases where a non-root Acronis process spawns a child process with root effective UID or when the process UID itself changes to zero, potentially exploiting vulnerabilities such as CVE-2026-87886. The rule also correlates this behavior with suspicious file permission changes (chmod/chown) on Acronis plugin directories.
Detects anomalous process execution where a non-privileged process spawns a child process with root/SYSTEM (uid 0) privileges without passing through recognized elevation binaries (e.g., sudo, su, pkexec). This behavior is consistent with post-exploitation privilege escalation techniques, such as exploiting hijacked file descriptors or callback structures to gain root authority.
Detects anomalous process execution where a non-privileged process spawns a child process with root/SYSTEM (uid 0) privileges without passing through recognized elevation binaries (e.g., sudo, su, pkexec). This behavior is consistent with post-exploitation privilege escalation techniques, such as exploiting hijacked file descriptors or callback structures to gain root authority.
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