Ibrahim Saud
@tektrixIndiaCompletionist
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11,679 detections
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Detects the spawning of shells, network utilities, or scripting interpreters from Citrix NetScaler processes (nsppe or httpd), which may indicate post-exploitation activity following an initial access vulnerability.
Detects core NetScaler service processes (nsppe, httpd, aslearning) initiating outbound network connections to external, non-private IP addresses. This behavior is indicative of post-exploitation C2 beaconing activity on a compromised NetScaler appliance.
Detects anomalous AWS activity combining bulk secret retrieval from AWS Secrets Manager using the BatchGetSecretValue API with subsequent authentication failures or validation errors in AWS STS. This behavior is indicative of automated credential harvesting pipelines or agentic frameworks rapidly enumerating and testing stolen credentials.
This rule detects potential DNS tunneling or beaconing activity by monitoring DNS queries for patterns commonly associated with command and control traffic. It flags anomalous DNS behavior including excessively long query strings, usage of TXT or NULL record types, frequent NXDOMAIN responses, or high volumes of such queries from a single host, which are indicative of data exfiltration or C2 communication via the DNS protocol.
Detects the use of native Windows utilities (vssadmin.exe, wmic.exe, wbadmin.exe, bcdedit.exe) to delete volume shadow copies, backup catalogs, or modify boot configuration data to inhibit system recovery, a common behavior observed during ransomware and wiper attacks.
Detects the deletion of volume shadow copies using common Windows administrative tools such as vssadmin, wmic, and PowerShell. This activity is frequently observed during the pre-encryption stage of ransomware attacks to prevent system restoration.
Detects unauthorized access to or generation of Citrix NetScaler core dump files, trace outputs, or memory diagnostic artifacts. These artifacts are high-value targets for attackers, such as those exploiting CVE-2026-88772, who attempt to extract session tokens, credentials, and sensitive data residing in memory via these diagnostic mechanisms.
Detects command-line activity attempting to disable, unbind, or remove NetScaler AppFW (Web Application Firewall) profiles, signatures, or security policies. This activity is indicative of defense evasion following the exploitation of CVE-2026-88771 or CVE-2026-88772 to suppress security alerting on follow-on malicious activity.
Detects command-line activity on a NetScaler appliance indicative of defense evasion by truncating, deleting, or disabling audit logs (ns.log) and syslog forwarding services. This activity often follows the exploitation of public-facing application vulnerabilities where an attacker seeks to hide their presence.
Detects repeated crashes or restarts of the Citrix NetScaler packet engine (nsppe) correlated with a concurrent spike in inbound DTLS traffic. This pattern is indicative of potential memory-overflow exploitation attempts (consistent with CVE-2026-88772) targeting the VPN virtual server functionality, leading to a Denial of Service (DoS) condition.
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