Malware Analysis Report

2025-08-05 12:28

Sample ID 230923-jnss8adh3z
Target f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e
SHA256 f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e
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

f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e

Threat Level: Known bad

The file f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e was found to be: Known bad.

Malicious Activity Summary

smokeloader pub1 backdoor trojan

SmokeLoader

Deletes itself

Executes dropped EXE

Suspicious use of SetThreadContext

Unsigned PE

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of WriteProcessMemory

Checks SCSI registry key(s)

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-09-23 07:49

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-09-23 07:49

Reported

2023-09-23 07:52

Platform

win10-20230915-en

Max time kernel

158s

Max time network

131s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Deletes itself

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

Executes dropped EXE

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

Checks SCSI registry key(s)

Description Indicator Process Target
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\vbiwvhb N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\vbiwvhb N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\vbiwvhb N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.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\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\vbiwvhb 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 2464 wrote to memory of 2288 N/A C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe
PID 2464 wrote to memory of 2288 N/A C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe
PID 2464 wrote to memory of 2288 N/A C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe
PID 2464 wrote to memory of 2288 N/A C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe
PID 2464 wrote to memory of 2288 N/A C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe
PID 2464 wrote to memory of 2288 N/A C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe
PID 4624 wrote to memory of 3396 N/A C:\Users\Admin\AppData\Roaming\vbiwvhb C:\Users\Admin\AppData\Roaming\vbiwvhb
PID 4624 wrote to memory of 3396 N/A C:\Users\Admin\AppData\Roaming\vbiwvhb C:\Users\Admin\AppData\Roaming\vbiwvhb
PID 4624 wrote to memory of 3396 N/A C:\Users\Admin\AppData\Roaming\vbiwvhb C:\Users\Admin\AppData\Roaming\vbiwvhb
PID 4624 wrote to memory of 3396 N/A C:\Users\Admin\AppData\Roaming\vbiwvhb C:\Users\Admin\AppData\Roaming\vbiwvhb
PID 4624 wrote to memory of 3396 N/A C:\Users\Admin\AppData\Roaming\vbiwvhb C:\Users\Admin\AppData\Roaming\vbiwvhb
PID 4624 wrote to memory of 3396 N/A C:\Users\Admin\AppData\Roaming\vbiwvhb C:\Users\Admin\AppData\Roaming\vbiwvhb

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe

"C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe"

C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe

"C:\Users\Admin\AppData\Local\Temp\f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e.exe"

C:\Users\Admin\AppData\Roaming\vbiwvhb

C:\Users\Admin\AppData\Roaming\vbiwvhb

C:\Users\Admin\AppData\Roaming\vbiwvhb

C:\Users\Admin\AppData\Roaming\vbiwvhb

Network

Country Destination Domain Proto
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 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.0.8.0.8.0.8.0.ip6.arpa udp
US 8.8.8.8:53 127.175.169.194.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 6.173.189.20.in-addr.arpa udp
US 8.8.8.8:53 8.3.197.209.in-addr.arpa udp

Files

memory/2464-2-0x0000000002710000-0x0000000002719000-memory.dmp

memory/2464-1-0x00000000025C0000-0x00000000026C0000-memory.dmp

memory/2288-3-0x0000000000400000-0x0000000000409000-memory.dmp

memory/2288-4-0x0000000000400000-0x0000000000409000-memory.dmp

memory/2288-6-0x0000000000400000-0x0000000000409000-memory.dmp

memory/3244-5-0x0000000000710000-0x0000000000726000-memory.dmp

C:\Users\Admin\AppData\Roaming\vbiwvhb

MD5 25bf7b154a13bb7f14a809bfb3f37632
SHA1 a9b28f347faf641dbd7ec6014e7ffb49471be325
SHA256 f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e
SHA512 192b7cdf91bc68d88943aea1a4e7a7268af41298615099c1ee52c91beb643f4b57dce087b16670607cca9c23cab27d968060c6f020d63068906619d7b3c2b505

C:\Users\Admin\AppData\Roaming\vbiwvhb

MD5 25bf7b154a13bb7f14a809bfb3f37632
SHA1 a9b28f347faf641dbd7ec6014e7ffb49471be325
SHA256 f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e
SHA512 192b7cdf91bc68d88943aea1a4e7a7268af41298615099c1ee52c91beb643f4b57dce087b16670607cca9c23cab27d968060c6f020d63068906619d7b3c2b505

memory/4624-16-0x0000000002820000-0x0000000002920000-memory.dmp

C:\Users\Admin\AppData\Roaming\vbiwvhb

MD5 25bf7b154a13bb7f14a809bfb3f37632
SHA1 a9b28f347faf641dbd7ec6014e7ffb49471be325
SHA256 f76c96aea2f3809cc73e1d3ee497bc1abdbe2657e870844f8714cd11432e129e
SHA512 192b7cdf91bc68d88943aea1a4e7a7268af41298615099c1ee52c91beb643f4b57dce087b16670607cca9c23cab27d968060c6f020d63068906619d7b3c2b505

memory/3244-19-0x0000000000770000-0x0000000000786000-memory.dmp

memory/3396-22-0x0000000000400000-0x0000000000409000-memory.dmp