Daniel Jeremiah
@daniyyellUnited KingdomTrusted contributorCompletionist
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978 detections
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Detects Node.js or JavaScript runtimes executing code patterns commonly associated with GlassWorm-style supply chain attacks. The campaign abuses invisible Unicode variation selectors to hide malicious payloads that are decoded and executed through eval(). Investigate execution originating from repositories, package managers, VS Code extensions, or temporary development directories.
Detects the registration of a new authentication method (phone, authenticator app, passkey, or security key) in Azure Active Directory after a session exhibits unusual location or token behavior, indicated by a high or medium risk level, anonymous proxy usage, or unfamiliar features.
Detects IMAP, POP, SMTP AUTH, or other legacy authentication activity soon after the same account completes modern MFA. This could indicate an adversary bypassing MFA by using legacy protocols after successfully authenticating with modern MFA.
Detects device registration or join activity by an account shortly after a risky sign-in or policy-lure interaction, indicating potential compromise of the account.
Detects application consent by a user shortly after the same account clicked a code-of-conduct or compliance-themed message. This behavior can indicate a multi-stage phishing campaign where a user is lured into clicking a malicious link (e.g., a fake policy document) and subsequently grants OAuth permissions to a malicious application.
Detects a browser session requesting a device code and repeatedly polling the token endpoint while the victim completes authentication elsewhere. This behavior is indicative of an adversary using a device code phishing technique, often associated with the Tycoon threat actor.
Detects a mail forwarding or redirect rule created from a session that recently exhibited token replay or unusual client changes. This rule specifically looks for operations related to Inbox Rules in Exchange or Office 365 audit logs that contain keywords indicating forwarding or redirection.
Detects the creation and subsequent deletion or modification of 'wipefile.tmp' or similarly named temporary wipe artifacts, which are used by the Gentlemen ransomware during its cleanup phase. This rule specifically looks for file events (creation, deletion, modification) related to this filename.
Detects when a ScreenConnect installer or related process loads the 'vcredist_x64.dll' file from a temporary, downloads, or AppData folder. This behavior can indicate DLL side-loading, where a malicious DLL is placed in a location that a legitimate application will search before its intended, trusted location, potentially for privilege escalation or persistence.
Detects a shell script containing 'fanout' in its name, created or modified in common temporary directories like /tmp or /var/tmp, matching a reported propagation workflow. This activity is indicative of lateral movement attempts.
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