Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects a suspicious call to Invoke-WebRequest cmdlet where the and output is located in a suspicious location
Adversaries can use curl to download payloads remotely and execute them. Curl is included by default in Windows 10 build 17063 and later.
Detects the execution of "Ldifde.exe" with the import flag "-i". The can be abused to include HTTP-based arguments which will allow the arbitrary download of files from a remote server.
Detects Pandemic Windows Implant
Curl.EXE Execution
Sigma
Detects a curl process start on Windows, which could indicates a file download from a remote location or a simple web request to a remote server
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.
Finds PowerShell execution events that could involve a download.
BazaCall is a campaign that manipulate users into calling a customer support center, where they are instructed to download an Excel file to unsubscribe from a phony service. When the user opens the Excel file, they are prompted to enable a malicious macro that infects their device with BazaLoader.
This query hunts for an attacker-created copy of certutil.exe, a legitimate process, which the macro uses to download BazaLoader.
This query hunts for an attacker-created copy of certutil.exe, a legitimate process, which the macro uses to download BazaLoader.
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.
Yara rule that detects ChaosRAT backdoor.
ZLoader was delivered in a campaign in summer 2021 via malvertising. This campaign was tweeted about by @MsftSecIntel on twitter.
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 Oracle WebLogic being exploited to run a PowerShell script that downloads payloads.
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 Oracle WebLogic being exploited to run a PowerShell script that downloads payloads.
The pw protected zip attachment -> Word doc delivery method of Bazarloader utilizes Word to create an .hta file and launch it via MSHTA to connect to a malicious domain and pull down the Bazarloader paylaod.
Sample query that search for .settingcontent-ms that has been downloaded from the web.
Through Microsoft Edge, Internet Explorer, Google Chrome, Mozilla Firefox, Microsoft Outlook.
For questions @MiladMSFT on Twitter or milad.aslaner@microsoft.com.
Through Microsoft Edge, Internet Explorer, Google Chrome, Mozilla Firefox, Microsoft Outlook.
For questions @MiladMSFT on Twitter or milad.aslaner@microsoft.com.
This query was originally published in the threat analytics report, Operation Soft Cell.
Operation Soft Cell is a series of campaigns targeting users' call logs at telecommunications providers throughout the world. These attacks date from as early as 2012.
Operation Soft Cell operators sometimes use legitimate web server processes to launch commands, especially for network discovery and user/owner discovery. The following query detects activity of this kind.
Reference - https://www.cybereason.com/blog/operation-soft-cell-a-worldwide-campaign-against-telecommunications-providers
Operation Soft Cell is a series of campaigns targeting users' call logs at telecommunications providers throughout the world. These attacks date from as early as 2012.
Operation Soft Cell operators sometimes use legitimate web server processes to launch commands, especially for network discovery and user/owner discovery. The following query detects activity of this kind.
Reference - https://www.cybereason.com/blog/operation-soft-cell-a-worldwide-campaign-against-telecommunications-providers
'This query looks for new files being downloaded using Curl.'
This query was originally published on Twitter, by @MsftSecIntel.
Gootkit is malware that started life as a banking trojan, and has since extended its capabilities to allow for a variety of malicious activities.
The query helps find events related to Gootkit downloads and command-and-control behavior.
Reference - https://twitter.com/MsftSecIntel
Gootkit is malware that started life as a banking trojan, and has since extended its capabilities to allow for a variety of malicious activities.
The query helps find events related to Gootkit downloads and command-and-control behavior.
Reference - https://twitter.com/MsftSecIntel
Identify masqueraded DLLHost.exe file created by PowerShell.
Detects the suspicious execution of `certreq.exe` with specific command-line arguments that indicate an attempt to download files. This technique is documented in LOLBAS (Living Off The Land Binaries and Scripts) as a method for adversaries to transfer files into a compromised environment, bypassing traditional security controls.
This rule detects the execution of the Notepad++ updater utility (GUP.exe) when it is launched by a process other than Notepad++ itself, and is used to download files from the internet. Specifically, it looks for GUP.exe being executed with command-line arguments indicating an unzip operation ('-unzipto') and a URL ('http'), while ensuring the parent process is not Notepad++. This behavior can indicate an adversary abusing a legitimate utility for ingress tool transfer.
This rule detects suspicious PowerShell commands used to download files or content from the web. It specifically looks for the use of '.DownloadString(', '.DownloadFile(', 'Invoke-WebRequest', or 'iwr' within the process command line. These methods are commonly abused by adversaries to retrieve malicious payloads or scripts.
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