Malware Analysis Report

2025-08-05 12:27

Sample ID 230923-vqdb4aah23
Target e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89
SHA256 e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89
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

e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89

Threat Level: Known bad

The file e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89 was found to be: Known bad.

Malicious Activity Summary

smokeloader pub1 backdoor trojan

SmokeLoader

Executes dropped EXE

Suspicious use of SetThreadContext

Unsigned PE

Suspicious behavior: GetForegroundWindowSpam

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Uses Task Scheduler COM API

Checks SCSI registry key(s)

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-09-23 17:11

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-09-23 17:11

Reported

2023-09-23 17:13

Platform

win10v2004-20230915-en

Max time kernel

151s

Max time network

146s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\vaevhur N/A
N/A N/A C:\Users\Admin\AppData\Roaming\vaevhur N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\vaevhur N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\vaevhur N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\vaevhur N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.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\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\vaevhur N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1120 wrote to memory of 5100 N/A C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe
PID 1120 wrote to memory of 5100 N/A C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe
PID 1120 wrote to memory of 5100 N/A C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe
PID 1120 wrote to memory of 5100 N/A C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe
PID 1120 wrote to memory of 5100 N/A C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe
PID 1120 wrote to memory of 5100 N/A C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe
PID 1844 wrote to memory of 3892 N/A C:\Users\Admin\AppData\Roaming\vaevhur C:\Users\Admin\AppData\Roaming\vaevhur
PID 1844 wrote to memory of 3892 N/A C:\Users\Admin\AppData\Roaming\vaevhur C:\Users\Admin\AppData\Roaming\vaevhur
PID 1844 wrote to memory of 3892 N/A C:\Users\Admin\AppData\Roaming\vaevhur C:\Users\Admin\AppData\Roaming\vaevhur
PID 1844 wrote to memory of 3892 N/A C:\Users\Admin\AppData\Roaming\vaevhur C:\Users\Admin\AppData\Roaming\vaevhur
PID 1844 wrote to memory of 3892 N/A C:\Users\Admin\AppData\Roaming\vaevhur C:\Users\Admin\AppData\Roaming\vaevhur
PID 1844 wrote to memory of 3892 N/A C:\Users\Admin\AppData\Roaming\vaevhur C:\Users\Admin\AppData\Roaming\vaevhur

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe

"C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe"

C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe

"C:\Users\Admin\AppData\Local\Temp\e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89.exe"

C:\Users\Admin\AppData\Roaming\vaevhur

C:\Users\Admin\AppData\Roaming\vaevhur

C:\Users\Admin\AppData\Roaming\vaevhur

C:\Users\Admin\AppData\Roaming\vaevhur

Network

Country Destination Domain Proto
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 108.211.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 198.1.85.104.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 126.23.238.8.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 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 126.20.238.8.in-addr.arpa udp
US 8.8.8.8:53 210.80.50.20.in-addr.arpa udp

Files

memory/1120-1-0x0000000002890000-0x0000000002990000-memory.dmp

memory/1120-2-0x0000000002850000-0x0000000002859000-memory.dmp

memory/5100-3-0x0000000000400000-0x0000000000409000-memory.dmp

memory/5100-4-0x0000000000400000-0x0000000000409000-memory.dmp

memory/3164-5-0x00000000006A0000-0x00000000006B6000-memory.dmp

memory/5100-6-0x0000000000400000-0x0000000000409000-memory.dmp

C:\Users\Admin\AppData\Roaming\vaevhur

MD5 9201a6faa902397373c885d6d69ece9e
SHA1 7ca9268955de314da0e5d154afca5d27403073a7
SHA256 e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89
SHA512 0a4952173c000338444f5df32b64369f724d3040ede8c6dd32265eaed88ced0e951596a201fcb404f5ca4f7857ad4673f803c346adff19fcd025e7b374b3961a

C:\Users\Admin\AppData\Roaming\vaevhur

MD5 9201a6faa902397373c885d6d69ece9e
SHA1 7ca9268955de314da0e5d154afca5d27403073a7
SHA256 e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89
SHA512 0a4952173c000338444f5df32b64369f724d3040ede8c6dd32265eaed88ced0e951596a201fcb404f5ca4f7857ad4673f803c346adff19fcd025e7b374b3961a

memory/1844-16-0x00000000028C0000-0x00000000029C0000-memory.dmp

C:\Users\Admin\AppData\Roaming\vaevhur

MD5 9201a6faa902397373c885d6d69ece9e
SHA1 7ca9268955de314da0e5d154afca5d27403073a7
SHA256 e52dd9c3f4a93bb109e3d72602d7000f02c83a230fa392b0e3ae1ac039a58b89
SHA512 0a4952173c000338444f5df32b64369f724d3040ede8c6dd32265eaed88ced0e951596a201fcb404f5ca4f7857ad4673f803c346adff19fcd025e7b374b3961a

memory/3164-19-0x0000000002A30000-0x0000000002A46000-memory.dmp

memory/3892-22-0x0000000000400000-0x0000000000409000-memory.dmp