Daniel Jeremiah
@daniyyellUnited KingdomTrusted contributorCompletionist
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978 detections
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Detects cloud searches for credential, key, production, database, or confidential terms followed by access to matching files within OneDrive.
Detects a single identity rapidly reading a large number of distinct secrets from an Azure Key Vault within a short timeframe (10 minutes). This behavior is indicative of automated secret harvesting, potentially by an attacker who has compromised an identity with access to the Key Vault. The rule specifically looks for at least 25 reads and 10 distinct secrets accessed by the same identity and IP address within the time window.
Detects requests to the PeopleSoft listening connector containing loopback, link-local, or private network targets in the URL or captured request fields. This indicates a potential Server-Side Request Forgery (SSRF) attempt.
Detects outbound email from an organizational mailbox to a common consumer email provider with multiple or large attachments. This could indicate data exfiltration or unauthorized transfer of sensitive information.
Detects files or directories created beneath the PSEMHUB environment metadata transactions staging path, which could indicate data staging or server compromise. This rule specifically looks for file creation, modification, or renaming events within paths containing 'PSEMHUB.war' and '/envmetadata/transactions/' or '\envmetadata\transactions\'.
Detects a script or document containing PowerShell commands for web retrieval (Invoke-WebRequest or DownloadString) that specifically targets an .rtf file from a URL. This pattern is indicative of a staging mechanism for malware like Animateclipper.
Detects an executable containing numeric argument parsing and Base64 decoding routines used as a staged execution gate. This YARA rule specifically looks for the presence of API calls related to command-line argument parsing (CommandLineToArgvW, atoi, strtoul) and Base64 decoding (CryptStringToBinary) within an executable, which are indicative of malware like Sessiongate.
Detects a batch or script artifact that creates a scheduled task named 'ApphostRagistreationVerifier' (a likely typo for 'ApphostRegistrationVerifier') which is configured to execute a file located within the 'Windows\Fonts\' directory. The detection specifically looks for the presence of 'schtasks' command, 'ONSTART' trigger, and 'SYSTEM' user context, indicating a persistent scheduled task.
Detects a logon task or Run value that starts PowerShell with a network retrieval expression rather than a local administrative script. This rule specifically looks for modifications to registry run keys that include PowerShell or pwsh commands attempting to download content using methods like Invoke-WebRequest, DownloadString, DownloadFile, Net.WebClient, or curl.
Detects rapid screenshot capture and image encoding by a non-support process for live remote viewing, indicative of a Remote Access Trojan (RAT) like Banana RAT. The rule specifically looks for process command lines containing functions related to screen capturing (CopyFromScreen, BitBlt, Graphics.CopyFromScreen) and image encoding/streaming (JPEG, Bitmap, stream, frame, socket).
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