Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects suspicious use of command-line tools such as curl or wget to download remote content - particularly scripts - into temporary directories (e.g., /dev/shm, /tmp), followed by immediate execution, indicating potential malicious activity. This pattern is commonly used by malicious scripts, stagers, or downloaders in fileless or multi-stage Linux attacks.
The following analytic detects the suspicious add user account type. This behavior is critical for a SOC to monitor because it may indicate attempts to gain unauthorized access or maintain control over a system. Such actions could be signs of malicious activity. If confirmed, this could lead to serious consequences, including a compromised system, unauthorized access to sensitive data, or even a wider breach affecting the entire network. Detecting and responding to these signs early is essential to prevent potential security incidents.
This rule detects the creation of hidden files or directories on Linux systems. It specifically looks for common commands like 'mkdir', 'nano', 'touch', 'vi', or 'vim' being executed with arguments that start with a '.' (dot), which is the standard convention for hidden files and directories in Unix-like operating systems. This behavior is often used by adversaries for defense evasion.
Process executed from binary hidden in Base64 encoded file. Encoding malicious software is a.
Technique to obfuscate files from detection.
The first and second ProcessCommandLine component is looking for Python decoding base64.
The third ProcesssCommandLine component is looking for the Bash/sh commandline base64 decoding tool.
The fourth one is looking for Ruby decoding base64.
Technique to obfuscate files from detection.
The first and second ProcessCommandLine component is looking for Python decoding base64.
The third ProcesssCommandLine component is looking for the Bash/sh commandline base64 decoding tool.
The fourth one is looking for Ruby decoding base64.
Detects the use of the "capsh" utility to invoke a shell.
'Malware authors will sometimes hardcode user agent string values when writing the network communication component of their malware. Malformed user agents can be an indication of such malware.'
'This query will determine multiple password resets by user across multiple data sources.
Account manipulation including password reset may aid adversaries in maintaining access to credentials and certain permission levels within an environment.'
Account manipulation including password reset may aid adversaries in maintaining access to credentials and certain permission levels within an environment.'
'Identifies a list of IP addresses with a minimum number (default of 5) of failed logon attempts to Microsoft Entra ID.
Uses that list to identify any successful remote logons to hosts from these IPs within the same timeframe.'
Uses that list to identify any successful remote logons to hosts from these IPs within the same timeframe.'
Microsoft has observed attackers exploiting vulnerabilities associated with Log4J.
Detects execution of inline Python code via the "-c" in order to call the "system" function from the "os" library, and spawn a shell.
'Matches domain name IOCs related to Forest Blizzard group activity published July 2019 with CommonSecurityLog, DnsEvents and VMConnection dataTypes.
References: https://blogs.microsoft.com/on-the-issues/2019/07/17/new-cyberthreats-require-new-ways-to-protect-democracy/.'
References: https://blogs.microsoft.com/on-the-issues/2019/07/17/new-cyberthreats-require-new-ways-to-protect-democracy/.'
This query was originally published in the threat analytics report, EvilQuest signals the rise of Mac ransomware.
As of the time of this writing (October 2020), ransomware designed to target macOS is relatively rare. EvilQuest is one of the few examples of this kind of malware on the platform.
The query below can help locate a reverse shell established by an attacker. The command the query searches for is associated with, but not definitely indicative of, EvilQuest infections.
Other queries related to EvilQuest ransomware can be found under the See also section below.
As of the time of this writing (October 2020), ransomware designed to target macOS is relatively rare. EvilQuest is one of the few examples of this kind of malware on the platform.
The query below can help locate a reverse shell established by an attacker. The command the query searches for is associated with, but not definitely indicative of, EvilQuest infections.
Other queries related to EvilQuest ransomware can be found under the See also section below.
'This script identifies password changes or resets across multiple host and cloud sources. Account manipulation, including password changes and resets, may help adversaries maintain access to credentials and permission levels.'
This query will provide a report of many of the best practice configurations for Defender ATP deployment. Special Thanks to Gilad Mittelman for the initial inspiration and concept.
Any tests which are reporting "BAD" as a result imply that the associated capability is not configured per best practice recommendation.
Any tests which are reporting "BAD" as a result imply that the associated capability is not configured per best practice recommendation.
This query was originally published in the threat analytics report, Sysrv botnet evolution.
Sysrv is a Go-based botnet that targets both Windows and Linux servers, and steals resources to mine cryptocurrency.
The following query finds instances of remote code execution on a vulnerable Linux server.
Sysrv is a Go-based botnet that targets both Windows and Linux servers, and steals resources to mine cryptocurrency.
The following query finds instances of remote code execution on a vulnerable Linux server.
This query was originally published by PWC Security Research Team.
BPFDoor is custom backdoor malware used by Red Menshen. The BPFDoor allows an adversary to backdoor a system and remotely execute codes without opening any new network ports or firewall rules.
BPFDoor is custom backdoor malware used by Red Menshen. The BPFDoor allows an adversary to backdoor a system and remotely execute codes without opening any new network ports or firewall rules.
Query 1 shows you any network communication happened from endpoints to a specific Remote IP or Remote URL.
Ensure to update RemoteIP and RemoteURL variable.
For questions @MiladMSFT on Twitter or milad.aslaner@microsoft.com by email.
Ensure to update RemoteIP and RemoteURL variable.
For questions @MiladMSFT on Twitter or milad.aslaner@microsoft.com by email.
'Any Alerts that fired related to a given File during the range of +6h and -3d'
This query was originally published in the threat analytics report, Sysrv botnet evolution.
Sysrv is a Go-based botnet that targets both Windows and Linux servers, and steals resources to mine cryptocurrency.
The following query finds instances where the attacker commanded the Kinsing miner file to be downloaded on Linux devices.
Sysrv is a Go-based botnet that targets both Windows and Linux servers, and steals resources to mine cryptocurrency.
The following query finds instances where the attacker commanded the Kinsing miner file to be downloaded on Linux devices.
This query was originally published in the threat analytics report, Sysrv botnet evolution.
Sysrv is a Go-based botnet that targets both Windows and Linux servers, and steals resources to mine cryptocurrency.
The following query finds instances of the attacker attempting to stop the AppArmor network security service on devices running Linux.
Sysrv is a Go-based botnet that targets both Windows and Linux servers, and steals resources to mine cryptocurrency.
The following query finds instances of the attacker attempting to stop the AppArmor network security service on devices running Linux.
The query checks process command being placed into the script; CVE-2022-22960 allows a user to write to it and be executed as root.
This vulnerability of VMware Workspace ONE Access, Identity Manager and vRealize Automation contain a privilege escalation vulnerability due to improper permissions in support scripts.
CVE: CVE-2022-22960.
Read more here:.
https://www.cisa.gov/uscert/ncas/alerts/aa22-138b
https://www.vmware.com/security/advisories/VMSA-2022-0011.html
Tags: #exploit #CVE-2022-22960
This vulnerability of VMware Workspace ONE Access, Identity Manager and vRealize Automation contain a privilege escalation vulnerability due to improper permissions in support scripts.
CVE: CVE-2022-22960.
Read more here:.
https://www.cisa.gov/uscert/ncas/alerts/aa22-138b
https://www.vmware.com/security/advisories/VMSA-2022-0011.html
Tags: #exploit #CVE-2022-22960
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