Ibrahim Saud
@tektrixIndiaCompletionist
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11,679 detections
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Detects high volumes of DTLS/UDP session-initiation traffic targeting NetScaler VPN virtual servers that are immediately followed by appliance-level error logs or crashes. This behavior is indicative of active probing or exploitation attempts, such as those associated with CVE-2026-88772, where malicious payloads cause service instability.
Detects a potential post-compromise lateral movement sequence where a host, previously identified as accessing sensitive browser credential files by an unauthorized process, subsequently initiates RDP or WinRM connections to other internal hosts using an account not previously observed performing interactive logons on that source host.
Detects potential session cookie replay attacks by identifying sign-in events using SSO or session tokens from different IP addresses, geographic locations, or devices compared to an established user baseline, without a corresponding fresh MFA challenge in the same timeframe. This behavior is indicative of unauthorized access to an already-authenticated session.
Detects unauthorized processes attempting to read sensitive session files or databases associated with messaging applications like Telegram, Signal, and Discord. Accessing these files (such as 'tdata', 'db.sqlite', or 'leveldb') allows for full account takeover by extracting session tokens, enabling attackers to bypass authentication and 2FA.
Detects unauthorized access to DPAPI master key files located in the Windows user profile (%APPDATA%\Microsoft\Protect\). This activity is commonly associated with infostealers attempting to decrypt browser-stored credentials (cookies, passwords) by manually accessing the master key files after exfiltrating encrypted data stores.
Detects DNS resolution attempts for newly registered or suspicious top-level domains (e.g., .xyz, .top, .live) that mimic corporate Identity Provider (IdP) or Single Sign-On (SSO) login portals. This behavior is characteristic of Adversary-in-the-Middle (AiTM) phishing kits like EvilProxy or Tycoon2FA, intended to capture user session tokens. Note: This rule monitors for initial domain contact and should be correlated with subsequent authentication logs to identify potential session hijacking.
Detects a sequence of events indicative of an account takeover (ATO) attack, starting with a help-desk initiated password reset, followed immediately by new MFA factor or device enrollment, and concluding with an application login from an unrecognized device or location.
Detects VMware ESXi shell activity associated with the ShinySp1d3r encryptor. This includes the termination of VM processes via esxcli or vim-cmd, the deletion of VM snapshots, and suspicious file renaming or encryption activity on datastores consistent with ransomware behaviors.
Detects successful authentication events to Snowflake cloud data warehouse platforms where no secondary authentication factor (MFA) was registered or triggered. This pattern is indicative of potential credential stuffing or reuse attacks, particularly those involving stolen credentials from infostealer malware, where MFA was not configured or successfully bypassed.
Detects a sequence of events indicative of Bring Your Own Vulnerable Driver (BYOVD) exploitation. The rule correlates the creation of a new service with kernel-mode drivers, the loading of a signed driver, and the subsequent termination or disabling of common EDR security processes within a short timeframe, suggesting the exploitation of the driver to bypass EDR defenses.
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