Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This query was originally published in the threat analytics report, Msiexec abuse.
Msiexec.exe is a Windows component that installs files with the .msi extension. These kinds of files are Windows installer packages, and are used by a wide array of legitimate software. However, malicious actors can re-purpose msiexec.exe for living-off-the-land attacks, where they use legitimate system binaries on the compromised device to perform attacks.
The following query detects activity associated with misuse of msiexec.exe, particularly alongside mimikatz, a common credential dumper and privilege escalation tool.
Reference - https://www.varonis.com/blog/what-is-mimikatz/
Msiexec.exe is a Windows component that installs files with the .msi extension. These kinds of files are Windows installer packages, and are used by a wide array of legitimate software. However, malicious actors can re-purpose msiexec.exe for living-off-the-land attacks, where they use legitimate system binaries on the compromised device to perform attacks.
The following query detects activity associated with misuse of msiexec.exe, particularly alongside mimikatz, a common credential dumper and privilege escalation tool.
Reference - https://www.varonis.com/blog/what-is-mimikatz/
Detects remote access to the LSASS process via WinRM. This could be a sign of credential dumping from tools like mimikatz.
This query was originally published in the threat analytics report, Msiexec abuse.
Msiexec.exe is a Windows component that installs files with the .msi extension. These kinds of files are Windows installer packages, and are used by a wide array of legitimate software. However, malicious actors can re-purpose msiexec.exe for living-off-the-land attacks, where they use legitimate system binaries on the compromised device to perform attacks.
The following query detects activity associated with misuse of msiexec.exe, particularly alongside mimikatz, a common credential dumper and privilege escalation tool.
Reference - https://www.varonis.com/blog/what-is-mimikatz/
Msiexec.exe is a Windows component that installs files with the .msi extension. These kinds of files are Windows installer packages, and are used by a wide array of legitimate software. However, malicious actors can re-purpose msiexec.exe for living-off-the-land attacks, where they use legitimate system binaries on the compromised device to perform attacks.
The following query detects activity associated with misuse of msiexec.exe, particularly alongside mimikatz, a common credential dumper and privilege escalation tool.
Reference - https://www.varonis.com/blog/what-is-mimikatz/
Detects process access requests to LSASS process with potentially suspicious access flags
Detects process access to LSASS memory with suspicious access flags and from a potentially suspicious folder
Detects process access to LSASS memory with uncommon access flags 0x410 and 0x01410
'This hunting query looks for file paths/hashes related to observed activity by Dev-0228. The actor is known to use custom version of popular tool like PsExec, Procdump etc. to carry its activity.
The risk score associated with each result is based on a number of factors, hosts with higher risk events should be investigated first.
This query uses the Microsoft Sentinel Information Model - https://docs.microsoft.com/azure/sentinel/normalization'
The risk score associated with each result is based on a number of factors, hosts with higher risk events should be investigated first.
This query uses the Microsoft Sentinel Information Model - https://docs.microsoft.com/azure/sentinel/normalization'
'This hunting query looks for file paths/hashes related to observed activity by Dev-0228. The actor is known to use custom version of popular tool like PsExec, Procdump etc. to carry its activity.
The risk score associated with each result is based on a number of factors, hosts with higher risk events should be investigated first.'
The risk score associated with each result is based on a number of factors, hosts with higher risk events should be investigated first.'
Detects suspicious process access to the Local Security Authority Subsystem Service (LSASS) memory. The rule specifically looks for processes attempting to access LSASS with certain access flags from potentially suspicious folders like temporary directories or user application data folders. This behavior is indicative of credential dumping attempts, often performed by malware or attackers to harvest credentials.
This rule detects the execution of Mimikatz or Mimikatz-like tools by looking for specific command-line arguments commonly used by the tool. Mimikatz is a well-known post-exploitation tool used to extract plaintext passwords, hash, PIN codes, and Kerberos tickets from memory, particularly from the Local Security Authority Subsystem Service (LSASS) process. The rule identifies various Mimikatz modules and commands such as "dumpcreds", "mimikatz", "::aadcookie", "::detours", "::memssp", "::mflt", "::ncroutemon", "::ngcsign", "::printnightmare", "::skeleton", "::preshutdown", "::mstsc", "::multirdp", "rpc::", "token::", "crypto::", "dpapi::", "sekurlsa::", "kerberos::", "lsadump::", "privilege::", "process::", and "vault::". Detection of these arguments indicates an attempt to perform credential access or privilege escalation.
This rule detects attempts to dump credentials from the Local Security Authority Subsystem Service (LSASS) process using `WerFault.exe`. It specifically looks for `WerFault.exe` accessing `lsass.exe` with a specific access mask (`0x1FFFFF`), which is indicative of memory dumping tools like Mimikatz, NanoDump, Invoke-Mimikatz, Procdump, or Taskmgr. This technique is often used by adversaries to extract credentials for lateral movement or persistence.
Detects process access requests to the LSASS process with specific call trace calls and access masks. This behavior is expressed by many credential dumping tools such as Mimikatz, NanoDump, Invoke-Mimikatz, Procdump and even the Taskmgr dumping feature.
This rule detects the execution of the Mimikatz tool by looking for the string "mimikatz" (case-insensitive) in the command line of newly launched processes. Mimikatz is a well-known credential dumping tool often used by adversaries to extract plaintext passwords, hash, PIN codes, and Kerberos tickets from memory.
This rule detects suspicious command-line activity indicative of credential access or reconnaissance, as outlined in a CISA 'Living off the Land' report. Specifically, it looks for commands that attempt to list SSH known hosts, access Firefox profiles, execute Mimikatz, query OpenSSH or RealVNC registry keys, or save SAM/SYSTEM registry hives. While individual commands might be benign, their combined presence or repeated execution could signal malicious intent.
This rule detects the creation of files with specific naming conventions and extensions that are indicative of exported or stolen DPAPI backup keys and certificates. These patterns are commonly associated with tools like Mimikatz and DSInternals, which adversaries use to extract credentials and cryptographic material from Windows systems. The rule looks for filenames containing "ntds_capi_", "ntds_legacy_", or "ntds_unknown_" and ending with ".cer", ".key", ".pfx", or ".pvk".
Detects suspicious processes based on name and location that access the Windows Credential Manager and Vault. This activity can be indicative of credential stealing, such as that performed by Mimikatz's "dpapi::cred" function.
Detects file access requests to the Windows Credential History File by an uncommon application. This can be a sign of credential stealing, for example, the usage of Mimikatz's "dpapi::credhist" function. The rule filters out common legitimate system processes and applications to reduce false positives.
Detects the execution of the SharpDPAPI tool based on command-line flags and PE metadata. SharpDPAPI is a C# port of some DPAPI functionality from the Mimikatz project, used for extracting credentials and other sensitive information.
The analytic detects a suspicious registry modification that enables the plain text credential feature in Windows by setting the "UseLogonCredential" value to 1 in the WDigest registry path. This activity is commonly used by malware and tools like Mimikatz to dump plain text credentials, indicating a potential credential dumping attempt. If confirmed malicious, this could allow an attacker to obtain sensitive credentials, leading to further compromise and lateral movement within the network.
The analytic detects the creation of files with extensions commonly associated with the Mimikatz Crypto module. It leverages the Endpoint.Filesystem data model to identify specific file names indicative of certificate export activities. This behavior is significant as it may indicate the use of Mimikatz to export cryptographic keys, which is a common tactic for credential theft. If confirmed malicious, this activity could allow an attacker to exfiltrate sensitive cryptographic material, potentially leading to unauthorized access and further compromise of the environment.
The following analytic detects the use of Mimikatz command line parameters associated with pass-the-ticket attacks. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on specific command-line patterns related to Kerberos ticket manipulation. This activity is significant because pass-the-ticket attacks allow adversaries to move laterally within an environment using stolen Kerberos tickets, bypassing normal access controls. If confirmed malicious, this could enable attackers to escalate privileges, access sensitive information, and maintain persistence within the network.
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