Ibrahim Saud
@tektrixIndiaCompletionist
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11,679 detections
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Detects inbound emails containing malicious QR codes (quishing) or HTML smuggling payloads designed to facilitate credential harvesting (AiTM). The rule identifies suspicious attachments, HTML-based obfuscation (e.g., atob, Blob) in email bodies, and QR-code-themed image attachments, filtering out internal communications.
Detects the registration or modification of multi-factor authentication (MFA) security information in Entra ID or Okta that occurs within 15 minutes of a sign-in event flagged as risky. This behavioral pattern is a common indicator of persistence being established by an attacker after performing an adversary-in-the-middle (AiTM) attack, where they leverage a stolen session to register their own MFA factors to maintain long-term access.
This rule detects activities indicative of an attacker attempting to establish an adversary-in-the-middle (AiTM) position within an on-premises network. It flags potential NTLM relay attempts (via loopback or invalid workstation indicators) and unauthorized name resolution spoofing (LLMNR/NBT-NS) used to intercept and relay authentication traffic for MFA bypass or credential theft.
Detects the execution of msiexec.exe initiated by a Windows script host (wscript.exe or cscript.exe) in close temporal proximity to a suspicious PowerShell command. The PowerShell command includes flags common in obfuscated or downloader scripts such as '-NoProfile' combined with file manipulation or sleep cmdlets, which may indicate a multi-stage infection or payload delivery chain.
Detects the execution of PowerShell via WScript or CScript scripts that contain command line arguments indicative of a file download cradle (e.g., Invoke-WebRequest, IWR, Net.WebClient, DownloadFile, DownloadString, or BITS transfer). This pattern is frequently used by adversaries to download and execute second-stage payloads or RMM agents.
Detects the execution of PowerShell with the -NoProfile flag initiated by wscript.exe or cscript.exe, containing sleep/delay commands alongside network download functions. This pattern is characteristic of malware loaders or RMM phishing kits attempting to evade sandbox analysis before initiating a remote download.
Detects two-stage network activity associated with Adversary-in-the-Middle (AiTM) phishing kits. The first part detects the submission of stolen credentials or session data to a local WebDAV panel (xwps.php), and the second part detects the subsequent exfiltration of that captured data to the Telegram Bot API.
Detects anomalous authentication patterns in Microsoft 365 logs characterized by rapid login attempts from a high number of distinct IP addresses and autonomous systems (ASNs) within a short timeframe. This behavior is indicative of Adversary-in-the-Middle (AiTM) attacks involving session-token theft and replay, where the adversary uses rotating residential proxy infrastructure to bypass location-based conditional access policies.
Detects the initiation of a SOCKS5 proxy handshake from an internal host to an external destination. The rule monitors for the characteristic SOCKS5 greeting (0x05) while specifically excluding HTTP traffic to identify potential unauthorized proxy tunneling used for command and control or data exfiltration.
Detects the MSBuild.exe process adding new root or intermediate certificate authorities to the Windows certificate stores. This activity is indicative of potential malicious PKI infrastructure staging, which can be used to facilitate adversary-in-the-middle (AiTM) attacks or bypass certificate validation.
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