Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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'This query looks for suspicious request patterns to Exchange servers that fit patterns recently blogged about by PeterJson. This exploitation chain utilises an SSRF vulnerability in Exchange which eventually allows the attacker to execute arbitrary Powershell on the server.
In the example powershell can be used to write an email to disk with an encoded attachment containing a shell.
Reference: https://peterjson.medium.com/reproducing-the-proxyshell-pwn2own-exploit-49743a4ea9a1'
In the example powershell can be used to write an email to disk with an encoded attachment containing a shell.
Reference: https://peterjson.medium.com/reproducing-the-proxyshell-pwn2own-exploit-49743a4ea9a1'
This query helps in checking for spoofing attempts on the domain with Authentication failures
Jupyter, otherwise known as SolarMarker, is a malware family and cluster of components known for its info-stealing and backdoor capabilities that mainly proliferates through search engine optimization manipulation and malicious advertising in order to successfully encourage users to download malicious templates and documents. This malware has been popular since 2020 and currently is still active as of 2021.
This query helps reviewing top 100 malicious senders
This query helps hunting for top outbound recipient domains which are sending inbound emails with threats
This query was originally published in the threat analytics report, OSX/SurfBuyer adware campaign.
It will return results if a shell script has furtively attempted to decode and save a file to a /tmp folder.
If discovered on your system, this kind of activity might be associated with SurfBuyer, which is adware that installs a browser extension to take control of several major web browsers, including Safari, Google Chrome, and Firefox.
It will return results if a shell script has furtively attempted to decode and save a file to a /tmp folder.
If discovered on your system, this kind of activity might be associated with SurfBuyer, which is adware that installs a browser extension to take control of several major web browsers, including Safari, Google Chrome, and Firefox.
Use this query to find attempts to access files in the local path containing Outlook emails.
Identify prior activity from this campaign using IOCs shared by Microsoft's Threat Intelligence Center, or MSTIC.
Read more: https://blogs.microsoft.com/on-the-issues/2020/10/28/cyberattacks-phosphorus-t20-munich-security-conference/
Read more: https://blogs.microsoft.com/on-the-issues/2020/10/28/cyberattacks-phosphorus-t20-munich-security-conference/
Use this query to locate commands related to discovering highly privileged users in an environment, sometimes a precursor to ransomware
This query helps hunting for Tenant allow/block list (TABL) changes in Defender for Office 365
This query helps report daily on total number of emails, total number of emails detected aby Defender for Office 365
This query searches for not onboarded devices with a specific Suffix
This query calculates device uptime based on periodic DeviceInfo which is recorded every 15 minutes regardless of device's network connectivity and uploaded once device gets online. If its interval is over 16 minutes, we can consider device is turned off.Calculated uptime may include up to 30 minutes gap. Devices may be turned on up to 15 minutes earlier than the "timestamp", and may be turned off up to 15 minutes later than the "LastTimestamp". When the single independent DeviceInfo without any sequential DeviceInfo within 16 minutes before or after is recorded, "DurationAtLeast" will be displayed as "00.00:00:00".
This query will count the number of devices in Defender ATP based
on their DNS suffix. For a full list of devices with the DNS
suffix, comment out or remove the last line.
on their DNS suffix. For a full list of devices with the DNS
suffix, comment out or remove the last line.
Intent:
- Use MTP capability to look for insider threat potential risk indicators
- Indicators would then serve as the building block for insider threat risk modeling in subsequent tools
Definition of Insider Threat:
"The potential for an individual who has or had authorized access to an organization's assets to use their access, either maliciously or unintentionally, to act in a way that could negatively affect the organization."
This collection of queries describes the different indicators that could be used to model and look for patterns suggesting an increased risk of an individual becoming a potential insider threat.
Note: no single indicator should be used as a lone determinant of insider threat activity, but should be part of an overall program to understand the increased risk to your organization's critical assets. This in turn is used to feed an investigation by a formal insider threat program to look at the context associated with the whole person to understand the implication of a set of indicators.
- Use MTP capability to look for insider threat potential risk indicators
- Indicators would then serve as the building block for insider threat risk modeling in subsequent tools
Definition of Insider Threat:
"The potential for an individual who has or had authorized access to an organization's assets to use their access, either maliciously or unintentionally, to act in a way that could negatively affect the organization."
This collection of queries describes the different indicators that could be used to model and look for patterns suggesting an increased risk of an individual becoming a potential insider threat.
Note: no single indicator should be used as a lone determinant of insider threat activity, but should be part of an overall program to understand the increased risk to your organization's critical assets. This in turn is used to feed an investigation by a formal insider threat program to look at the context associated with the whole person to understand the implication of a set of indicators.
Looking for high volume queries against a given RemoteIP, per DeviceName, RemotePort and Process.
Please change the Timestamp window according your preference/objective, as also the subnet ranges that you want to analyze against.
Please change the Timestamp window according your preference/objective, as also the subnet ranges that you want to analyze against.
'Identifies when 100 or more failed attempts by a given user in 10 minutes occur on the IIS Server.
This could be indicative of attempted brute force based on known account information.
This could also simply indicate a misconfigured service or device.
References:
IIS status code mapping - https://support.microsoft.com/help/943891/the-http-status-code-in-iis-7-0-iis-7-5-and-iis-8-0
Win32 Status code mapping - https://msdn.microsoft.com/library/cc231199.aspx'
This could be indicative of attempted brute force based on known account information.
This could also simply indicate a misconfigured service or device.
References:
IIS status code mapping - https://support.microsoft.com/help/943891/the-http-status-code-in-iis-7-0-iis-7-5-and-iis-8-0
Win32 Status code mapping - https://msdn.microsoft.com/library/cc231199.aspx'
'The Exchange Powershell Snapin was loaded on a host, this allows for a Exchange server management via PowerShell.
Whilst this is a legitimate administrative tool it is abused by attackers to performs actions on a compromised
Exchange server. Hunt for unusual activity related to this Snapin including it being added on new hosts or by
new accounts.'
Whilst this is a legitimate administrative tool it is abused by attackers to performs actions on a compromised
Exchange server. Hunt for unusual activity related to this Snapin including it being added on new hosts or by
new accounts.'
This query helps reviewing zero day threats via URL and file detonations
Look for the creation of suspicious DLL files spawned in the \spool\ folder along with DLLs that were recently loaded afterwards from \Old.
LemonDuck is an actively updated and robust malware primarily known for its botnet and cryptocurrency mining objectives. First discovered in 2019, LemonDuck has since adopted more sophisticated behavior and escalated its operations in 2021. Today, beyond using resources for its traditional bot and mining activities, LemonDuck steals credentials, removes security controls, spreads via emails, moves laterally, and ultimately drops more tools for human-operated activity.
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