Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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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.
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
The query helps detect emails associated with the open redirector URL campaign using Defender for Office 365 data.
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.
'Identifies instances of a base64 encoded PE file header seen in the process command line parameter.
To use this analytics rule, make sure you have deployed the [ASIM normalization parsers](https://aka.ms/ASimProcessEvent)'
To use this analytics rule, make sure you have deployed the [ASIM normalization parsers](https://aka.ms/ASimProcessEvent)'
This rule detects DNS queries to domains associated with legitimate remote access software (e.g., TeamViewer, Go2Assist, LogMeIn, AmmyyAdmin, RustDesk, Quick Assist, Remote Utilities, Tailscale, Twingate, NetSupport Manager) when those queries originate from a non-browser application. Adversaries often leverage these legitimate tools to establish command and control (C2) channels or maintain persistence on compromised systems, as they may be allowed by application control policies. The rule includes extensive filters to exclude common web browsers and other legitimate system processes that might legitimately query these domains, aiming to reduce false positives.
'Extracts MDATP Alerts that indicate a command was executed by a web shell. Uses time window based querying to idneitfy the potential web shell location on the server, then enriches with Attacker IP and User Agent'
'This query identifies matches based on domain IOCs related to KNOTWEED against Microsoft Defender for Endpoint device network connections'
Remote Monitoring and Management (RMM) programs are IT to manage remote endpoints. Attackers have begun to abuse these programs to persist or provide C2 channels.
https://github.com/jischell-msft/RemoteManagementMonitoringTools
https://github.com/jischell-msft/RemoteManagementMonitoringTools
This query checks for specific processes and domain TLD used in the CVE-2018-4878 flash 0day exploit attack reported by KrCERT.
CVE: CVE-2018-4878.
Read more here:.
Https://www.krcert.or.kr/data/secNoticeView.do?bulletin_writing_sequence=26998.
Https://helpx.adobe.com/security/products/flash-player/apsa18-01.html.
Http://blog.talosintelligence.com/2018/02/group-123-goes-wild.html.
Http://blog.morphisec.com/flash-exploit-cve-2018-4878-spotted-in-the-wild-massive-malspam-campaign.
Tags: #exploit #CVE-2018-4878 #0day #Korea #Flash.
CVE: CVE-2018-4878.
Read more here:.
Https://www.krcert.or.kr/data/secNoticeView.do?bulletin_writing_sequence=26998.
Https://helpx.adobe.com/security/products/flash-player/apsa18-01.html.
Http://blog.talosintelligence.com/2018/02/group-123-goes-wild.html.
Http://blog.morphisec.com/flash-exploit-cve-2018-4878-spotted-in-the-wild-massive-malspam-campaign.
Tags: #exploit #CVE-2018-4878 #0day #Korea #Flash.
'Malware can use IP address to communicate with C2.'
Detects potential execution of MeshAgent which is a tool used for remote access.
Historical data shows that threat actors rename MeshAgent binary to evade detection.
Matching command lines with the '--meshServiceName' argument can indicate that the MeshAgent is being used for remote access.
Historical data shows that threat actors rename MeshAgent binary to evade detection.
Matching command lines with the '--meshServiceName' argument can indicate that the MeshAgent is being used for remote access.
ZLoader was delivered in a campaign in summer 2021 via malvertising. This campaign was tweeted about by @MsftSecIntel on twitter.
Qakbot operators have been abusing the Craigslist messaging system to send malicious emails. These emails contain non-clickable links to malicious domains impersonating Craigslist, which the user is instructed to manually type into the address bar to access.
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
Snip3 is a family of related remote access trojans. Although the malware in this family contain numerous small variations, they all exhibit similar behaviors and techniques.
The following query looks for the method that Snip3 malware use to obfuscate PowerShell commands with UTF8 encoding. This technique is intended to evade detection from security products, and avoids the more standard switches used for encoding in malware such as Emotet.
At present, this method of encoding is much more rare, being seen largely with loader installation of RevengeRAT, AsyncRAT and other RATs used in campaigns targeting the aviation industry.
The following query looks for the method that Snip3 malware use to obfuscate PowerShell commands with UTF8 encoding. This technique is intended to evade detection from security products, and avoids the more standard switches used for encoding in malware such as Emotet.
At present, this method of encoding is much more rare, being seen largely with loader installation of RevengeRAT, AsyncRAT and other RATs used in campaigns targeting the aviation industry.
This query will identify strings in process command lines which match Base64 encoding format, extract the string to a column called Base64, and decode it in a column called DecodedString.
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".
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.
This query finds network communication to specific URL.
Please note that in line #7 it filters RemoteUrl using has operator, which looks for a "whole term" and runs faster.
Example: RemoteUrl has "microsoft" matches "www.microsoft.com" but not "microsoftonline.com".
Please note that in line #7 it filters RemoteUrl using has operator, which looks for a "whole term" and runs faster.
Example: RemoteUrl has "microsoft" matches "www.microsoft.com" but not "microsoftonline.com".
Remote Monitoring and Management (RMM) programs are IT to manage remote endpoints. Attackers have begun to abuse these programs to persist or provide C2 channels.
https://github.com/jischell-msft/RemoteManagementMonitoringTools
https://github.com/jischell-msft/RemoteManagementMonitoringTools
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