Ibrahim Saud
@tektrixIndiaCompletionist
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11,679 detections
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Detects behavioral indicators associated with VILE ransomware, specifically focused on defense evasion through Windows event log clearing, termination of security-related processes, and the presence of specific ransomware-related configuration or identity files in common staging directories.
Detects Grixba infostealer activity associated with the Play Ransomware group. The rule monitors for network host and share enumeration using net.exe and WMIC, and tracks the execution of the Grixba binary GT_NET.exe from the non-standard path C:\Users\Public\Music\.
Detects the Grixba infostealer (associated with Play ransomware operations) by identifying the loading of the XOR-encrypted payload 'inf_g.dll' from commonly abused directories like Temp, AppData, ProgramData, or the Public folder, particularly when the file is unsigned.
Detects internal emails with subject or body content related to payroll information changes (e.g., direct deposit, bank account redirection) sent to HR or payroll-related email addresses or recipients. This behavior is indicative of internal Business Email Compromise (BEC) or an attempt by an attacker (or compromised insider) to facilitate payroll fraud.
Detects the use of rundll32.exe to execute the MiniDump function of comsvcs.dll, a known technique for dumping the memory of the Local Security Authority Subsystem Service (LSASS) process to gain access to stored credentials.
Detects high-risk activity where a user session, characterized by specific suspicious browser user agents and non-interactive authentication (indicative of token replay/session hijacking), is followed by changes to Workday payroll information (direct deposit, banking details) or unauthorized access to HR-related email content.
This rule detects suspicious process access or remote thread creation events where AdgNsy.exe interacts with WAB.exe (Windows Address Book). Such activity is indicative of potential process injection or unauthorized memory access to steal contact data or manipulate process memory.
Detects the execution of unauthorized network scanning tools (e.g., netscan.exe, n.exe), usage of reconnaissance PowerShell scripts like Invoke-ShareFinder, or the creation of common reconnaissance artifacts such as 'delete.me' or 'shares.txt'. The rule monitors Sysmon process creation, network connection events, and file creation events to identify activities consistent with internal network discovery and lateral movement preparation.
Detects the loading of known vulnerable drivers (rwdrv.sys, hlpdrv.sys) used for potential Bring Your Own Vulnerable Driver (BYOVD) attacks, accompanied by evidence of antivirus tampering through process execution or the creation of suspicious directories related to AV killing utilities.
This rule monitors Microsoft Graph API audit logs for suspicious activity targeting user objects. It specifically detects attempts at bulk enumeration, use of pagination to circumvent limits, or searches using keywords associated with sensitive organizational data (e.g., payroll, finance, hr, admin).
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