Ticket#3523215/STONEHENGE/[##336332##] High - SentinelOne Threat - Stonehenge Advisors, Inc - ScreenConnect.ClientSetup.exe - -- has been updated - user@withoutemail.com | WithoutEmail.com

This ticket has been updated by John Lewis

John Lewis

4/29/2026 2:17 PM

Reviewed the S1 alert and confirmed this was our Screen Connect Client.
Checked the machine backstage and the only RMM agents on the machine are from Atlantic.

[image]

Marking as a false positive and adding to the exclusions.
No further action required.
Closing ticket.

Summary:

[##336332##] High - SentinelOne Threat - Stonehenge Advisors, Inc - ScreenConnect.ClientSetup.exe -

Status:

Closed

Ticket #

3523215

Company:

Stonehenge Advisors, Inc

Contact:

Dan Sablosky (POC)

Phone:

(215) 320-3777

Address:

4328-42 Ridge Avenue
Suite 104
Philadelphia, PA 19129

View Ticket

Discussion

John Lewis

4/29/2026 2:17 PM-2:21 PM

Reviewed the S1 alert and confirmed this was our Screen Connect Client.
Checked the machine backstage and the only RMM agents on the machine are from Atlantic.

[image]

Marking as a false positive and adding to the exclusions.
No further action required.
Closing ticket.

Dan Sablosky (POC)

4/29/2026 2:05 AM-

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Dear IH-Atlantic_Stonehenge Advisors,

A ticket has been created with the following details:

Account Name: Atlantic_Stonehenge Advisors
Ticket ID:  336332
Priority:  High
Subject:  High - SentinelOne Threat - Stonehenge Advisors, Inc - ScreenConnect.ClientSetup.exe - 04/29/26
Description:

EDR: ScreenConnect.ClientSetup.exe

Customer: Stonehenge Advisors, Inc |                            Detected: 2026-04-29 01:56:39 UTC-04

Priority: HighSource: SentineloneThreat status: Mitigated - contained by socKill: SuccessQuarantine: Success
Alert Link:EDR Alert

Executive Summary                AI-Assisted

A security agent detected suspicious software on an employee's desktop used by lisad, classified as a high-risk event due to strong malicious confidence and revocation of its certificate; the threat was successfully contained by the endpoint protection platform. The affected device is a Windows desktop and the mitigation actions have completed. Business impact is limited but could have included unauthorized access or operational disruption if not contained, so ongoing monitoring is advised.

SOC Response Actions
Actions the SOC performed (or attempted). Follow this link for further information on Use Case #5 and Use Case #6.
ActionStatus

--- ---
DESKTOP-LisaD, no full disk scan command was sent.                        Not Configured
DESKTOP-LisaD, endpoint was not isolated from the network.                        Not Configured

Recommended Remediation

[Containment] Isolate host 'DESKTOP-LisaD' from the network and disable its external IP 70.91.36.137 in perimeter controls.
[Eradication] Remove the file '\Device\HarddiskVolume3\windows\SystemTemp\ScreenConnect\24.2.10.8991\ScreenConnect.ClientSetup.exe' and ensure the file hash 'da6461465247022bae455d548efc31ff5161147fec953643dd2bbf2af7a1a6d4' is blocked in endpoint prevention policies.
[Eradication] Uninstall unauthorized ConnectWise/ScreenConnect software and revoke any associated certificates issued to 'CONNECTWISE, LLC'.
[Hardening] Force password reset for user 'lisad' and invalidate active sessions and remote access credentials.
[Hardening] Apply endpoint agent update to version >=25.2.5.437 where available, enforce application allowlisting, and block execution from SystemTemp paths.

Key Details
Threat ClassificationGeneralEndpoint NameDESKTOP-LisaD
Detection EngineSentinelOne CloudEndpoint IP Address192.168.1.111
File Path\Device\HarddiskVolume3\windows\SystemTemp\ScreenConnect\24.2.10.8991\ScreenConnect.ClientSetup.exeSite NameStonehenge Advisors
File Hashda6461465247022bae455d548efc31ff5161147fec953643dd2bbf2af7a1a6d4 MaliciousGroup NameStonehenge Advisors Inc - HQ
File Publisher NameCONNECTWISE, LLCSentinelOne Mitigation Policyprotect
File Publisher Signed & VerifiedRevokedSentinelOne Mitigation Statusmitigated
Command Line
SOC Findings
Threat Intelligence & Reputation
VirusTotal

da646146...f7a1a6d4
Malicious
File hash detected by 31 security engines. Classified under the meaningful name /home/petik/ss/malware/2026-03-19_f07a87485bd2333bb7e91f26bd5b8700_amadey_elex_glassworm_hellokitty_hijackloader_icedid_luca-stealer_njrat_remcos_smoke-loader_vidar.
Hybrid-Analysis

da646146...f7a1a6d4
No Relevant Results
No behavioral or reputation data returned for this hash at the time of analysis.
Indicators of Compromise

No threat indicators flagged by source tool

Cross-Service Intelligence Markdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Sy...

Below is additional context from other services subscribed by the customer.
ServiceSourceRelevant InsightReference

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Need help or want us to take additional actions? Reply to this ticket and the SOC will assist.

You can view all details here: 336332

Dan Sablosky (POC)

4/28/2026 6:51 PM-

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Dear IH-Atlantic_Stonehenge Advisors,

A ticket has been created with the following details:

Account Name: Atlantic_Stonehenge Advisors
Ticket ID:  336079
Priority:  High
Subject:  High - SentinelOne Threat - Stonehenge Advisors, Inc - ScreenConnect.ClientSetup.exe - 04/28/26
Description:

EDR: ScreenConnect.ClientSetup.exe

Customer: Stonehenge Advisors, Inc |                            Detected: 2026-04-28 18:41:51 UTC-04

Priority: HighSource: SentineloneThreat status: Mitigated - contained by socQuarantine: SuccessKill: Success
Alert Link:EDR Alert

Executive Summary                AI-Assisted

A security tool detected suspicious software on a laptop used by user 'jennifer_b', assessed as high risk due to a malicious verdict from the detection engine; the device was protected and the activity was successfully mitigated. The incident is contained and not actively spreading. Business impact could include potential disruption to that user’s work and temporary loss of confidence in remote support tools if similar software were widespread.

SOC Response Actions
Actions the SOC performed (or attempted). Follow this link for further information on Use Case #5 and Use Case #6.
ActionStatus

--- ---
DESKTOP-100MB9F, no full disk scan command was sent.                        Not Configured
DESKTOP-100MB9F, endpoint was not isolated from the network.                        Not Configured

Recommended Remediation

[Containment] Isolate the affected endpoint 'DESKTOP-100MB9F' from the network (disable Wi‑Fi and remove wired connections) until further remediation is applied.
[Eradication] Remove the file '\Device\HarddiskVolume3\WINDOWS\SystemTemp\ScreenConnect\24.2.10.8991\ScreenConnect.ClientSetup.exe' and ensure the quarantined copy is preserved per incident handling policy.
[Eradication] Delete any remaining instances of the identified binary hash 'da6461465247022bae455d548efc31ff5161147fec953643dd2bbf2af7a1a6d4' from endpoints and endpoint management repositories.
[Hardening] Revoke and replace any certificates associated with publisher 'CONNECTWISE, LLC' used on the affected host if they are not verified as valid.
[Hardening] Ensure the user 'jennifer_b' has a password reset and enforce multifactor authentication for their account.

Key Details
Threat ClassificationGeneralEndpoint NameDESKTOP-100MB9F
Detection EngineSentinelOne CloudEndpoint IP Address192.168.1.193
File Path\Device\HarddiskVolume3\WINDOWS\SystemTemp\ScreenConnect\24.2.10.8991\ScreenConnect.ClientSetup.exeSite NameStonehenge Advisors
File Hashda6461465247022bae455d548efc31ff5161147fec953643dd2bbf2af7a1a6d4 MaliciousGroup Name Stonehenge Advisors Inc - LYNDON KPG-MCG Curtis Tenant LLC
File Publisher NameCONNECTWISE, LLCSentinelOne Mitigation Policyprotect
File Publisher Signed & VerifiedRevokedSentinelOne Mitigation Statusmitigated
Command Line
SOC Findings
Threat Intelligence & Reputation
VirusTotal

da646146...f7a1a6d4
Malicious
File hash detected by 31 security engines. Classified under the meaningful name /home/petik/ss/malware/2026-03-19_f07a87485bd2333bb7e91f26bd5b8700_amadey_elex_glassworm_hellokitty_hijackloader_icedid_luca-stealer_njrat_remcos_smoke-loader_vidar.
Hybrid-Analysis

da646146...f7a1a6d4
No Relevant Results
No behavioral or reputation data returned for this hash at the time of analysis.
Indicators of Compromise

No threat indicators flagged by source tool

--- --- --- ---
ESN/ANo relevant tools configured for enrichment.

Need help or want us to take additional actions? Reply to this ticket and the SOC will assist.

You can view all details here: 336079

Dan Sablosky (POC)

4/28/2026 5:53 PM-

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Dear IH-Atlantic_Stonehenge Advisors,

A ticket has been created with the following details:

Account Name: Atlantic_Stonehenge Advisors
Ticket ID:  336034
Priority:  High
Subject:  High - SentinelOne Threat - Stonehenge Advisors, Inc - ScreenConnect.ClientSetup.exe - 04/28/26
Description:

EDR: ScreenConnect.ClientSetup.exe

Customer: Stonehenge Advisors, Inc |                            Detected: 2026-04-28 17:46:29 UTC-04

Priority: HighSource: SentineloneThreat status: Mitigated - contained by socKill: SuccessQuarantine: Success
Alert Link:EDR Alert

Executive Summary                AI-Assisted

A security agent detected suspicious software on a Windows desktop used by user 'olgag', rated as a high-risk event due to the software's revoked certificate and malicious verdict. The device was automatically isolated and remediation actions completed to stop the activity, so immediate spread has been prevented. While no active threats remain on that endpoint, the event posed a moderate-to-high business risk because such software could enable unauthorized access or disruption if it had run unchecked. Continued monitoring of endpoints and user accounts is recommended.

SOC Response Actions
Actions the SOC performed (or attempted). Follow this link for further information on Use Case #5 and Use Case #6.
ActionStatus

--- ---
DESKTOP-J36C9TV, no full disk scan command was sent.                        Not Configured
DESKTOP-J36C9TV, endpoint was not isolated from the network.                        Not Configured

Recommended Remediation

[Containment] Isolate the affected endpoint 'DESKTOP-J36C9TV' from the network and remove its external IP '70.91.36.137' from any remote-access allowlists.
[Eradication] Uninstall the file 'ScreenConnect.ClientSetup.exe' located at '\Device\HarddiskVolume3\WINDOWS\SystemTemp\ScreenConnect\24.2.10.8991\ScreenConnect.ClientSetup.exe' and delete the file hashes 'da6461465247022bae455d548efc31ff5161147fec953643dd2bbf2af7a1a6d4' and '5e1c517442e30b54586627886ae4e745890dc936' from endpoints and central file shares.
[Eradication] Revoke or replace the certificate issued to 'CONNECTWISE, LLC' used by the identified binary and block execution of processes signed by that certificate across the environment.
[Hardening] Force password reset for user 'olgag' and ensure multifactor authentication is enabled for that account.
[Hardening] Implement application allowlisting to prevent execution from temporary system folders (for example, paths under '\Device\HarddiskVolume3\WINDOWS\SystemTemp') and block execution of revoked-signed binaries.

Key Details
Threat ClassificationGeneralEndpoint NameDESKTOP-J36C9TV
Detection EngineSentinelOne CloudEndpoint IP Address192.168.1.106
File Path\Device\HarddiskVolume3\WINDOWS\SystemTemp\ScreenConnect\24.2.10.8991\ScreenConnect.ClientSetup.exeSite NameStonehenge Advisors
File Hashda6461465247022bae455d548efc31ff5161147fec953643dd2bbf2af7a1a6d4 MaliciousGroup NameStonehenge Advisors Inc - HQ
File Publisher NameCONNECTWISE, LLCSentinelOne Mitigation Policyprotect
File Publisher Signed & VerifiedRevokedSentinelOne Mitigation Statusmitigated
Command Line
SOC Findings
File Hash Correlation

The following file hash DA6461465247022BAE455D548EFC31FF5161147FEC953643DD2BBF2AF7A1A6D4 was detected as 'SCREENCONNECT.CLIENTSETUP.EXE' on endpoint DESKTOP-FG7FIBT and 'SCREENCONNECT.CLIENTSETUP.EXE' on endpoint DESKTOP-J36C9TV.

Threat Intelligence & Reputation
VirusTotal

da646146...f7a1a6d4
Malicious
File hash detected by 31 security engines. Classified under the meaningful name /home/petik/ss/malware/2026-03-19_f07a87485bd2333bb7e91f26bd5b8700_amadey_elex_glassworm_hellokitty_hijackloader_icedid_luca-stealer_njrat_remcos_smoke-loader_vidar.
Hybrid-Analysis

da646146...f7a1a6d4
No Relevant Results
No behavioral or reputation data returned for this hash at the time of analysis.
Indicators of Compromise

No threat indicators flagged by source tool
Cross-Service Intelligence            Markdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Syntax.Inlines.HtmlEntityInlineMarkdig.Sy...

Below is additional context from other services subscribed by the customer.
ServiceSourceRelevant InsightReference
--- --- --- ---
ESN/ANo relevant tools configured for enrichment.
Need help or want us to take additional actions? Reply to this ticket and the SOC will assist.

You can view all details here: 336034

View Ticket