Malware Analysis Report

2025-08-06 03:42

Sample ID 230921-zmz4xace84
Target 4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f
SHA256 4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f
Tags
smokeloader pub1 backdoor 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 Overview

score
10/10

SHA256

4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f

Threat Level: Known bad

The file 4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f was found to be: Known bad.

Malicious Activity Summary

smokeloader pub1 backdoor trojan

SmokeLoader

Suspicious use of SetThreadContext

Unsigned PE

Checks SCSI registry key(s)

Suspicious behavior: GetForegroundWindowSpam

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-09-21 20:50

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-09-21 20:50

Reported

2023-09-21 20:53

Platform

win10v2004-20230915-en

Max time kernel

150s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe N/A
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Suspicious behavior: GetForegroundWindowSpam

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

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1484 wrote to memory of 4356 N/A C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe
PID 1484 wrote to memory of 4356 N/A C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe
PID 1484 wrote to memory of 4356 N/A C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe
PID 1484 wrote to memory of 4356 N/A C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe
PID 1484 wrote to memory of 4356 N/A C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe
PID 1484 wrote to memory of 4356 N/A C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe

"C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe"

C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe

"C:\Users\Admin\AppData\Local\Temp\4b58638cdfb9a5264397c697d55ffc2e042bff4661a1963a0a93ee27f6c2ee3f.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 126.209.247.8.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 host-file-host6.com udp
US 8.8.8.8:53 host-host-file8.com udp
NL 194.169.175.127:80 host-host-file8.com tcp
US 8.8.8.8:53 127.175.169.194.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 254.177.238.8.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 23.173.189.20.in-addr.arpa udp

Files

memory/1484-1-0x00000000008E0000-0x00000000009E0000-memory.dmp

memory/1484-2-0x00000000008C0000-0x00000000008C9000-memory.dmp

memory/4356-3-0x0000000000400000-0x0000000000409000-memory.dmp

memory/4356-4-0x0000000000400000-0x0000000000409000-memory.dmp

memory/3188-5-0x0000000002AF0000-0x0000000002B06000-memory.dmp

memory/4356-6-0x0000000000400000-0x0000000000409000-memory.dmp