Malware Analysis Report

2025-05-06 03:20

Sample ID 241109-pcwcvstjdw
Target b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d
SHA256 b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d
Tags
smokeloader backdoor discovery trojan
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

b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d

Threat Level: Known bad

The file b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d was found to be: Known bad.

Malicious Activity Summary

smokeloader backdoor discovery trojan

SmokeLoader

Smokeloader family

Suspicious use of SetThreadContext

Unsigned PE

System Location Discovery: System Language Discovery

Checks SCSI registry key(s)

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-09 12:11

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-09 12:11

Reported

2024-11-09 12:14

Platform

win7-20241010-en

Max time kernel

66s

Max time network

19s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Smokeloader family

smokeloader

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2476 set thread context of 2896 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.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\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2476 wrote to memory of 2896 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2476 wrote to memory of 2896 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2476 wrote to memory of 2896 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2476 wrote to memory of 2896 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2476 wrote to memory of 2896 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2476 wrote to memory of 2896 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2476 wrote to memory of 2896 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2476 wrote to memory of 2896 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2476 wrote to memory of 2896 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

Processes

C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe

"C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe"

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

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

Network

N/A

Files

memory/2476-0-0x00000000000D3000-0x00000000000D5000-memory.dmp

memory/2896-4-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2896-2-0x0000000000400000-0x0000000000409000-memory.dmp

memory/2896-1-0x0000000000400000-0x0000000000409000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-09 12:11

Reported

2024-11-09 12:14

Platform

win10v2004-20241007-en

Max time kernel

135s

Max time network

140s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Smokeloader family

smokeloader

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4156 set thread context of 4792 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.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\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4156 wrote to memory of 5076 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 4156 wrote to memory of 5076 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 4156 wrote to memory of 5076 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 4156 wrote to memory of 4424 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 4156 wrote to memory of 4424 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 4156 wrote to memory of 4424 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 4156 wrote to memory of 4792 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 4156 wrote to memory of 4792 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 4156 wrote to memory of 4792 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 4156 wrote to memory of 4792 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 4156 wrote to memory of 4792 N/A C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

Processes

C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe

"C:\Users\Admin\AppData\Local\Temp\b6217af649d93b7f3d6c33adb19441b924e96d0309bf0bcdfa81461f8bf1638d.exe"

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

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

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

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

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 66.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 253.15.104.51.in-addr.arpa udp

Files

memory/4156-0-0x0000000000A93000-0x0000000000A95000-memory.dmp

memory/4792-1-0x0000000000400000-0x0000000000409000-memory.dmp