Analysis Overview
SHA256
4fc90290ee0c503c00448df7a3a84c1a88f07ba776dad08dfe43dd3e960d105c
Threat Level: Shows suspicious behavior
The file 4fc90290ee0c503c00448df7a3a84c1a88f07ba776dad08dfe43dd3e960d105c was found to be: Shows suspicious behavior.
Malicious Activity Summary
Registers COM server for autorun
Modifies system executable filetype association
Unsigned PE
Modifies registry class
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-06 15:02
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-06 15:02
Reported
2024-04-06 15:04
Platform
win7-20231129-en
Max time kernel
122s
Max time network
123s
Command Line
Signatures
Modifies system executable filetype association
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\ContextMenuHandlers\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C} | C:\Windows\system32\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\ContextMenuHandlers\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\ = "UTShellExt" | C:\Windows\system32\regsvr32.exe | N/A |
Registers COM server for autorun
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\4fc90290ee0c503c00448df7a3a84c1a88f07ba776dad08dfe43dd3e960d105c.dll" | C:\Windows\system32\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\system32\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\InProcServer32 | C:\Windows\system32\regsvr32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Msi.Package\shellex\ContextMenuHandlers\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C} | C:\Windows\system32\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\ = "UTShellExt" | C:\Windows\system32\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\InProcServer32 | C:\Windows\system32\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\system32\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\ContextMenuHandlers\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C} | C:\Windows\system32\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C} | C:\Windows\system32\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\4fc90290ee0c503c00448df7a3a84c1a88f07ba776dad08dfe43dd3e960d105c.dll" | C:\Windows\system32\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\ContextMenuHandlers\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\ = "UTShellExt" | C:\Windows\system32\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Msi.Package\shellex\ContextMenuHandlers\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\ = "UTShellExt" | C:\Windows\system32\regsvr32.exe | N/A |
Processes
C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\4fc90290ee0c503c00448df7a3a84c1a88f07ba776dad08dfe43dd3e960d105c.dll
Network
Files
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-06 15:02
Reported
2024-04-06 15:04
Platform
win10v2004-20240226-en
Max time kernel
94s
Max time network
127s
Command Line
Signatures
Modifies system executable filetype association
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\ContextMenuHandlers\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C} | C:\Windows\system32\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\ContextMenuHandlers\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\ = "UTShellExt" | C:\Windows\system32\regsvr32.exe | N/A |
Registers COM server for autorun
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\4fc90290ee0c503c00448df7a3a84c1a88f07ba776dad08dfe43dd3e960d105c.dll" | C:\Windows\system32\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\system32\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\InProcServer32 | C:\Windows\system32\regsvr32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Msi.Package\shellex\ContextMenuHandlers\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C} | C:\Windows\system32\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C} | C:\Windows\system32\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\4fc90290ee0c503c00448df7a3a84c1a88f07ba776dad08dfe43dd3e960d105c.dll" | C:\Windows\system32\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\ContextMenuHandlers\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C} | C:\Windows\system32\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\ContextMenuHandlers\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\ = "UTShellExt" | C:\Windows\system32\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Msi.Package\shellex\ContextMenuHandlers\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\ = "UTShellExt" | C:\Windows\system32\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\ = "UTShellExt" | C:\Windows\system32\regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\InProcServer32 | C:\Windows\system32\regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{FE8E6AD6-DABE-45E1-88C2-48DC4578924C}\InProcServer32\ThreadingModel = "Apartment" | C:\Windows\system32\regsvr32.exe | N/A |
Processes
C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\4fc90290ee0c503c00448df7a3a84c1a88f07ba776dad08dfe43dd3e960d105c.dll
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 83.211.222.173.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 138.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 133.211.185.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 159.113.53.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 17.143.109.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 249.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 130.136.73.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.236.111.52.in-addr.arpa | udp |