Tim Peck
@timpeckTrusted contributorCompletionist
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916 detections
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Detects a temporal pattern characteristic of CVE-2026-42897 XSS exploitation: an OWA user reads a message (via Bind, OpenMessage, or similar EWS/OWA endpoints), and within 60 seconds, the same session issues a POST request to create or modify an inbox rule. This rapid succession from the same session cookie indicates programmatic action (XSS-driven JavaScript) rather than human-driven workflow. The rule correlates events by client IP and username within a 60-second window.
Detects the use of launchctl submit to establish persistence on macOS.
Unlike the more common LaunchAgent/LaunchDaemon plist approach, launchctl
submit registers a job directly via the command line without creating a
plist file on disk, making it harder to discover through filesystem
sweeps. This technique is used by JINX-0164 (Wiz CIRT) to persist
AUDIOFIX and MINIRAT payloads with job labels like chrome.job and
coreaudio.job, but the technique itself is rare in legitimate software.
The rule catches any launchctl submit invocation and flags known
JINX-0164 job labels for high-confidence triage.
Unlike the more common LaunchAgent/LaunchDaemon plist approach, launchctl
submit registers a job directly via the command line without creating a
plist file on disk, making it harder to discover through filesystem
sweeps. This technique is used by JINX-0164 (Wiz CIRT) to persist
AUDIOFIX and MINIRAT payloads with job labels like chrome.job and
coreaudio.job, but the technique itself is rare in legitimate software.
The rule catches any launchctl submit invocation and flags known
JINX-0164 job labels for high-confidence triage.
Detects the execution of scripts (.vbs, .js, .wsf, etc.) proxied through explorer.exe or rundll32.exe (via shell32.dll).
Threat actors embed these commands in .LNK files to bypass direct cscript/wscript detections and break process tree lineage. Because the user executes the LNK from the GUI, the desktop explorer.exe acts as the parent, mimicking normal user activity.
Threat actors embed these commands in .LNK files to bypass direct cscript/wscript detections and break process tree lineage. Because the user executes the LNK from the GUI, the desktop explorer.exe acts as the parent, mimicking normal user activity.
Detects appcmd.exe installing an IIS native module from a user-writable or non-standard path, a persistence technique used by the BadIIS lwxat ecosystem and earlier BadIIS variants. The detection broadens beyond specific module names to catch any module installation with the structural characteristics of the malware family: appcmd.exe registering native modules from non-System32 paths, with both 32-bit and 64-bit variants, from cmd.exe or service host parents.
Detects the exploitation primitive of CVE-2026-3102 at the post-injection execution layer. The exploit succeeds when exiftool constructs a /usr/bin/setfile command line containing attacker-injected shell metacharacters (single quotes for command injection, backticks or $() for command substitution, semicolons for command chaining). Detecting setfile invocations spawned by exiftool with these characters in arguments is the smoking-gun signal. Even future variants of this vulnerability class (or related n-day exploits in the same family) would produce this same parent/child + metacharacter pattern.
Detects modifications to /home/vmanage-admin/.ssh/authorized_keys on Cisco SD-WAN controllers (vSmart, vManage, vBond) by any process. This file is a post-exploitation persistence target documented by Resecurity and Rapid7 for CVE-2026-20182. Legitimate modifications to this file are extremely rare in production SD-WAN deployments, as the vmanage-admin account is an internal service account and its authorized_keys file is provisioned during initial deployment and rarely touched afterward. Any write event is worth immediate investigation.
Detects registry modifications setting ConsentPromptBehaviorAdmin to 0, which weakens UAC protections by elevating without prompting. This behavior was observed in the TAX#TRIDENT campaign where a script disguised as a PNG altered UAC policies prior to silently installing a ManageEngine agent.
Detects `git rebase` commands containing the `--exec=` flag when spawned by a Gogs or Gitea server process. This activity is indicative of the exploitation of an argument injection vulnerability (CVE-2022-46153) in Gogs/Gitea, which allows an authenticated user to achieve Remote Code Execution (RCE) by creating a pull request with a specially crafted branch name. The rule specifically looks for `git` or `git.exe` processes executing `rebase` with `--exec=` and originating from `gogs`, `gitea`, or common shell processes that might be spawned by them.
Systeminfo.exe Making Network Connection
Cortex XDR
Detects network connections originating from the systeminfo.exe process. This activity is suspicious because systeminfo.exe is a legitimate system enumeration tool not typically expected to initiate outbound network connections. This behavior has been observed in malware campaigns, such as CountLoader, which injects a cryptocurrency clipper into systeminfo.exe to communicate with C2 servers and the Ethereum blockchain.
Detects the ClickFix paste-and-run initial-access primitive used by KongTuke and other groups. This involves `explorer.exe` spawning PowerShell with defense-evasion arguments (`-NoProfile`, `-ExecutionPolicy Bypass`, `-WindowStyle Hidden`) and a downloader chain targeting cloud file-sharing services. The combination of `explorer.exe` parent (user typing into Run dialog), hidden execution flags, `Invoke-WebRequest`, and `Expand-Archive` in one command line is the defining fingerprint of the technique.
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