Malware Analysis Report

2025-04-13 20:58

Sample ID 250310-m7jlfasvh1
Target sars.exe
SHA256 5b2ae52cb8a7924d95ec9008dfcb8216468281fb5c7d07dcdf1a08b68f2bc65c
Tags
darkcloud discovery 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

5b2ae52cb8a7924d95ec9008dfcb8216468281fb5c7d07dcdf1a08b68f2bc65c

Threat Level: Known bad

The file sars.exe was found to be: Known bad.

Malicious Activity Summary

darkcloud discovery stealer

DarkCloud

Darkcloud family

Suspicious use of SetThreadContext

AutoIT Executable

Unsigned PE

System Location Discovery: System Language Discovery

Program crash

Suspicious use of SetWindowsHookEx

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-03-10 11:06

Signatures

AutoIT Executable

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-03-10 11:06

Reported

2025-03-10 11:08

Platform

win7-20240903-en

Max time kernel

141s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\sars.exe"

Signatures

DarkCloud

stealer darkcloud

Darkcloud family

darkcloud

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2156 set thread context of 2760 N/A C:\Users\Admin\AppData\Local\Temp\sars.exe C:\Windows\SysWOW64\svchost.exe

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\sars.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\svchost.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\sars.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\svchost.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\sars.exe

"C:\Users\Admin\AppData\Local\Temp\sars.exe"

C:\Windows\SysWOW64\svchost.exe

"C:\Users\Admin\AppData\Local\Temp\sars.exe"

Network

N/A

Files

memory/2156-6-0x0000000000670000-0x0000000000A70000-memory.dmp

memory/2760-7-0x0000000000400000-0x0000000000458000-memory.dmp

memory/2760-9-0x0000000000400000-0x0000000000458000-memory.dmp

memory/2760-12-0x0000000000400000-0x0000000000458000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-03-10 11:06

Reported

2025-03-10 11:08

Platform

win10v2004-20250217-en

Max time kernel

142s

Max time network

138s

Command Line

"C:\Users\Admin\AppData\Local\Temp\sars.exe"

Signatures

DarkCloud

stealer darkcloud

Darkcloud family

darkcloud

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3472 set thread context of 116 N/A C:\Users\Admin\AppData\Local\Temp\sars.exe C:\Windows\SysWOW64\svchost.exe

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\sars.exe

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\sars.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\svchost.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\sars.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\svchost.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3472 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\sars.exe C:\Windows\SysWOW64\svchost.exe
PID 3472 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\sars.exe C:\Windows\SysWOW64\svchost.exe
PID 3472 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\sars.exe C:\Windows\SysWOW64\svchost.exe
PID 3472 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\sars.exe C:\Windows\SysWOW64\svchost.exe

Processes

C:\Users\Admin\AppData\Local\Temp\sars.exe

"C:\Users\Admin\AppData\Local\Temp\sars.exe"

C:\Windows\SysWOW64\svchost.exe

"C:\Users\Admin\AppData\Local\Temp\sars.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3472 -ip 3472

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3472 -s 604

Network

Country Destination Domain Proto
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 20.189.173.27:443 tcp

Files

memory/3472-6-0x0000000001880000-0x0000000001C80000-memory.dmp

memory/116-7-0x0000000000400000-0x0000000000458000-memory.dmp

memory/116-9-0x0000000000400000-0x0000000000458000-memory.dmp

memory/116-12-0x0000000000400000-0x0000000000458000-memory.dmp