Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This query helps hunting for Automated email notifications and suspicious sign-in activity
This query helps in determining clickthroughs when email delivered because of detection overrides.
This detection approach correlates a user accessing an email with image/document attachments and a risky sign-in attempt from non-trusted devices.
This query helps hunt for emails with malicious URLs based on external IOC source
This query was originally published on Twitter, by @MsftSecIntel.
The query helps detect emails associated with a campaign that has used open redirector URLs. The campaign's URLs begin with the distinct pattern, hxxps://t. Attackers use URL redirection to manipulate users into visiting a malicious website or to evade detection.
Reference - https://twitter.com/MsftSecIntel
The query helps detect emails associated with a campaign that has used open redirector URLs. The campaign's URLs begin with the distinct pattern, hxxps://t. Attackers use URL redirection to manipulate users into visiting a malicious website or to evade detection.
Reference - https://twitter.com/MsftSecIntel
This query helps hunting for Emails containing links to IP addresses
This query visualises total emails with Phish detections over time summarizing the data daily by various Phish Detection technologies/controls
This query helps reviewing incoming email messages where the Display Name of the sender contains own or other partner company/brand name
'Alerts in links that have been shared across multiple Zoom chat channels by the same user in a short space if time.
Adjust the threshold figure to change the number of channels a message needs to be posted in before an alert is raised.'
Adjust the threshold figure to change the number of channels a message needs to be posted in before an alert is raised.'
This query helps reviewing sender IPs sending malicious email of type Malware or Phish
Provides a summary of total number of detections
This query visualises total emails with Phish detections over time summarizing the data daily.
Look for links opened from outlook.exe, followed by a browser download and then a SmartScreen app warning that was ignored by the user.
Read more about these events and this hunting approach in this post: https://techcommunity.microsoft.com/t5/forums/editpage/board-id/WDATPActor/message-id/34.
Data availability: SmartScreen events are available only on Windows 10 version 1703 and onwards.
Tags: #EmailLink, #BrowserDownload, #SmartScreen.
Read more about these events and this hunting approach in this post: https://techcommunity.microsoft.com/t5/forums/editpage/board-id/WDATPActor/message-id/34.
Data availability: SmartScreen events are available only on Windows 10 version 1703 and onwards.
Tags: #EmailLink, #BrowserDownload, #SmartScreen.
Query for links opened from mail apps - if a detection occurred right afterwards.
As there are many links opened from mails, to have a successful hunt we should have some filter or join with some other signal,.
Such as suspicious processes, network connections, etc.
Therefore, in this example, we query for alerts that might be related to links sent via email.
This could be indicative of a phishing or spear-phishing attacks.
Tags: #EmailLink, #Phishing, #GetNearbyAlerts.
Explaining the underlying data:.
This query uses the BrowserLaunchedToOpenUrl event, that includes clicks on http:// or https:// links (clicks outside of browsers), or on .lnk files.
For this event, RemoteUrl contains the opened URL.
As there are many links opened from mails, to have a successful hunt we should have some filter or join with some other signal,.
Such as suspicious processes, network connections, etc.
Therefore, in this example, we query for alerts that might be related to links sent via email.
This could be indicative of a phishing or spear-phishing attacks.
Tags: #EmailLink, #Phishing, #GetNearbyAlerts.
Explaining the underlying data:.
This query uses the BrowserLaunchedToOpenUrl event, that includes clicks on http:// or https:// links (clicks outside of browsers), or on .lnk files.
For this event, RemoteUrl contains the opened URL.
This query correlates Microsoft Defender for Office 365 signals and Microsoft Entra ID identity data to find the relevant endpoint event BrowerLaunchedToOpen in Microsoft Defender ATP.
This event reflects relevant clicks on the malicious URL in the spear-phishing email recognized by Microsoft Defender for Office 365.
This event reflects relevant clicks on the malicious URL in the spear-phishing email recognized by Microsoft Defender for Office 365.
This query identifies when a user clicks a link that opens a browser to navigate to a URL
which uses redirection. It then filters out any redirections to URLs in the same DNS namespace
as the originating URL. Redirection identification is done based on URL query parameters
outlined in the following article: https://www.bleepingcomputer.com/news/security/snapchat-amex-sites-abused-in-microsoft-365-phishing-attacks/
which uses redirection. It then filters out any redirections to URLs in the same DNS namespace
as the originating URL. Redirection identification is done based on URL query parameters
outlined in the following article: https://www.bleepingcomputer.com/news/security/snapchat-amex-sites-abused-in-microsoft-365-phishing-attacks/
Fake Replies
KQL
Use this query to find spoofed reply emails that contain certain keywords in the subject. The emails are also checked for a link to a document in Google Docs.
These attacks have been observed leading to ransomware
These attacks have been observed leading to ransomware
This query helps reviewing list of top users click on Phis URLs
This query visualises total inbound emails with Phish detections summarizing the data by the top email sender P2 domain (SenderFromDomain).
In this detection, we track emails with personalized subjects.
These queries was originally published in the threat analytics report, Attacks on gov't, think tanks, NGOs.
As described further in Analysis of cyberattack on U.S. think tanks, non-profits, public sector by unidentified attackers, there was a very large spear-phishing campaign launched in November 2019.
The attackers would gain access to a target by having the user click on a link to a compromised website and download a .zip archive.
Once established on a target's device, the attackers used a malicious DLL named cyzfc.dat to execute additional payloads. They would call a function in the malicious DLL via the legitimate Windows process, rundll32.exe, to connect directly to their command-and-control (C2) servers.
The following queries detect activity associated with the malicious DLL, cyzfc.dat., used in this campaign.
Reference - https://docs.microsoft.com/windows-server/administration/windows-commands/rundll32
As described further in Analysis of cyberattack on U.S. think tanks, non-profits, public sector by unidentified attackers, there was a very large spear-phishing campaign launched in November 2019.
The attackers would gain access to a target by having the user click on a link to a compromised website and download a .zip archive.
Once established on a target's device, the attackers used a malicious DLL named cyzfc.dat to execute additional payloads. They would call a function in the malicious DLL via the legitimate Windows process, rundll32.exe, to connect directly to their command-and-control (C2) servers.
The following queries detect activity associated with the malicious DLL, cyzfc.dat., used in this campaign.
Reference - https://docs.microsoft.com/windows-server/administration/windows-commands/rundll32
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