Malware Analysis Report

2025-04-13 21:01

Sample ID 250310-nezbvssnv3
Target 45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe
SHA256 45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f
Tags
discovery darkcloud stealer
score
10/10

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
10/10

SHA256

45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f

Threat Level: Known bad

The file 45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe was found to be: Known bad.

Malicious Activity Summary

discovery darkcloud stealer

DarkCloud

Suspicious use of NtCreateUserProcessOtherParentProcess

Darkcloud family

Drops startup file

Suspicious use of SetThreadContext

Unsigned PE

Program crash

System Location Discovery: System Language Discovery

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-03-10 11:19

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2025-03-10 11:19

Reported

2025-03-10 11:21

Platform

win7-20240903-en

Max time kernel

122s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe

"C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1872 -s 1236

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.arandelasespeciales.com udp
CA 15.235.119.29:443 www.arandelasespeciales.com tcp

Files

memory/1872-0-0x00000000747DE000-0x00000000747DF000-memory.dmp

memory/1872-1-0x0000000000040000-0x0000000000132000-memory.dmp

memory/1872-2-0x00000000747D0000-0x0000000074EBE000-memory.dmp

memory/1872-3-0x00000000747D0000-0x0000000074EBE000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-03-10 11:19

Reported

2025-03-10 11:21

Platform

win10v2004-20250217-en

Max time kernel

93s

Max time network

141s

Command Line

C:\Windows\Explorer.EXE

Signatures

DarkCloud

stealer darkcloud

Darkcloud family

darkcloud

Suspicious use of NtCreateUserProcessOtherParentProcess

Description Indicator Process Target
PID 1972 created 3452 N/A C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe C:\Windows\Explorer.EXE

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Instance.vbs C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1972 wrote to memory of 432 N/A C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1972 wrote to memory of 432 N/A C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1972 wrote to memory of 432 N/A C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1972 wrote to memory of 432 N/A C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1972 wrote to memory of 432 N/A C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1972 wrote to memory of 432 N/A C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1972 wrote to memory of 432 N/A C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1972 wrote to memory of 432 N/A C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe

Processes

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe

"C:\Users\Admin\AppData\Local\Temp\45b104579f856aba3d99b5370360240a3f9f95b82969e3f7ba12c14b0d7abb7f.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.arandelasespeciales.com udp
CA 15.235.119.29:443 www.arandelasespeciales.com tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 8.8.8.8:53 g.bing.com udp
US 150.171.28.10:443 g.bing.com tcp
US 150.171.27.10:443 g.bing.com tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp

Files

memory/1972-0-0x000000007502E000-0x000000007502F000-memory.dmp

memory/1972-1-0x0000000000770000-0x0000000000862000-memory.dmp

memory/1972-2-0x0000000075020000-0x00000000757D0000-memory.dmp

memory/1972-3-0x00000000064C0000-0x00000000065F8000-memory.dmp

memory/1972-11-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-21-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-61-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-67-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-65-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-63-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-57-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-55-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-53-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-51-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-49-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-45-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-43-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-41-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-35-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-33-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-31-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-29-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-27-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-25-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-23-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-19-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-17-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-15-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-13-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-9-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-59-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-7-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-47-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-39-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-37-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-5-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-4-0x00000000064C0000-0x00000000065F2000-memory.dmp

memory/1972-1326-0x0000000075020000-0x00000000757D0000-memory.dmp

memory/1972-1327-0x0000000006650000-0x00000000066E2000-memory.dmp

memory/1972-1328-0x0000000006700000-0x0000000006790000-memory.dmp

memory/1972-1329-0x0000000006820000-0x000000000686C000-memory.dmp

memory/1972-1330-0x00000000071A0000-0x0000000007744000-memory.dmp

memory/1972-1331-0x0000000006900000-0x0000000006954000-memory.dmp

memory/1972-1337-0x0000000075020000-0x00000000757D0000-memory.dmp

memory/1972-1342-0x0000000075020000-0x00000000757D0000-memory.dmp

memory/1972-1339-0x0000000075020000-0x00000000757D0000-memory.dmp

memory/432-1345-0x0000000000400000-0x0000000000470000-memory.dmp

memory/1972-1344-0x0000000075020000-0x00000000757D0000-memory.dmp

memory/432-1356-0x0000000000400000-0x0000000000470000-memory.dmp