Malware Analysis Report

2025-03-14 22:37

Sample ID 240406-sehrbscg9x
Target 4fc90290ee0c503c00448df7a3a84c1a88f07ba776dad08dfe43dd3e960d105c
SHA256 4fc90290ee0c503c00448df7a3a84c1a88f07ba776dad08dfe43dd3e960d105c
Tags
persistence
score
7/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
7/10

SHA256

4fc90290ee0c503c00448df7a3a84c1a88f07ba776dad08dfe43dd3e960d105c

Threat Level: Shows suspicious behavior

The file 4fc90290ee0c503c00448df7a3a84c1a88f07ba776dad08dfe43dd3e960d105c was found to be: Shows suspicious behavior.

Malicious Activity Summary

persistence

Registers COM server for autorun

Modifies system executable filetype association

Unsigned PE

Modifies registry class

MITRE ATT&CK

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

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\4fc90290ee0c503c00448df7a3a84c1a88f07ba776dad08dfe43dd3e960d105c.dll

Signatures

Modifies system executable filetype association

persistence
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

persistence
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

N/A

Files

N/A

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

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\4fc90290ee0c503c00448df7a3a84c1a88f07ba776dad08dfe43dd3e960d105c.dll

Signatures

Modifies system executable filetype association

persistence
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

persistence
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

Files

N/A