Malware Analysis Report

2025-04-13 21:01

Sample ID 250310-nfnxhssnx2
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

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of SetWindowsHookEx

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-03-10 11:20

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 11:20

Reported

2025-03-10 11:23

Platform

win7-20240903-en

Max time kernel

119s

Max time network

124s

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 2804 set thread context of 2680 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

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\sars.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/2804-6-0x0000000000B70000-0x0000000000F70000-memory.dmp

memory/2680-7-0x0000000000400000-0x0000000000458000-memory.dmp

memory/2680-9-0x0000000000450000-0x0000000000450000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-03-10 11:20

Reported

2025-03-10 11:23

Platform

win10v2004-20250217-en

Max time kernel

149s

Max time network

151s

Command Line

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

Signatures

DarkCloud

stealer darkcloud

Darkcloud family

darkcloud

AutoIT Executable

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3644 set thread context of 2020 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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3644 wrote to memory of 2020 N/A C:\Users\Admin\AppData\Local\Temp\sars.exe C:\Windows\SysWOW64\svchost.exe
PID 3644 wrote to memory of 2020 N/A C:\Users\Admin\AppData\Local\Temp\sars.exe C:\Windows\SysWOW64\svchost.exe
PID 3644 wrote to memory of 2020 N/A C:\Users\Admin\AppData\Local\Temp\sars.exe C:\Windows\SysWOW64\svchost.exe
PID 3644 wrote to memory of 2020 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"

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

Files

memory/3644-6-0x00000000011E0000-0x00000000015E0000-memory.dmp

memory/2020-7-0x0000000000400000-0x0000000000458000-memory.dmp

memory/2020-9-0x0000000000400000-0x0000000000458000-memory.dmp

memory/3644-12-0x00000000011E0000-0x00000000015E0000-memory.dmp

memory/2020-13-0x0000000000400000-0x0000000000458000-memory.dmp