Malware Analysis Report

2025-08-05 12:28

Sample ID 230922-zk3f9acc38
Target c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a
SHA256 c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a
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

c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a

Threat Level: Known bad

The file c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a 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: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Checks SCSI registry key(s)

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-09-22 20:47

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-09-22 20:47

Reported

2023-09-22 20:50

Platform

win10v2004-20230915-en

Max time kernel

152s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Executes dropped EXE

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

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\iewucdv N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\iewucdv N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\iewucdv N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.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\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\iewucdv 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 232 wrote to memory of 2956 N/A C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe
PID 232 wrote to memory of 2956 N/A C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe
PID 232 wrote to memory of 2956 N/A C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe
PID 232 wrote to memory of 2956 N/A C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe
PID 232 wrote to memory of 2956 N/A C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe
PID 232 wrote to memory of 2956 N/A C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe
PID 1764 wrote to memory of 1412 N/A C:\Users\Admin\AppData\Roaming\iewucdv C:\Users\Admin\AppData\Roaming\iewucdv
PID 1764 wrote to memory of 1412 N/A C:\Users\Admin\AppData\Roaming\iewucdv C:\Users\Admin\AppData\Roaming\iewucdv
PID 1764 wrote to memory of 1412 N/A C:\Users\Admin\AppData\Roaming\iewucdv C:\Users\Admin\AppData\Roaming\iewucdv
PID 1764 wrote to memory of 1412 N/A C:\Users\Admin\AppData\Roaming\iewucdv C:\Users\Admin\AppData\Roaming\iewucdv
PID 1764 wrote to memory of 1412 N/A C:\Users\Admin\AppData\Roaming\iewucdv C:\Users\Admin\AppData\Roaming\iewucdv
PID 1764 wrote to memory of 1412 N/A C:\Users\Admin\AppData\Roaming\iewucdv C:\Users\Admin\AppData\Roaming\iewucdv

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe

"C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe"

C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe

"C:\Users\Admin\AppData\Local\Temp\c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a.exe"

C:\Users\Admin\AppData\Roaming\iewucdv

C:\Users\Admin\AppData\Roaming\iewucdv

C:\Users\Admin\AppData\Roaming\iewucdv

C:\Users\Admin\AppData\Roaming\iewucdv

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.3.197.209.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 108.211.229.192.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.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 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.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 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 127.175.169.194.in-addr.arpa udp
US 8.8.8.8:53 218.240.110.104.in-addr.arpa udp
US 8.8.8.8:53 1.173.189.20.in-addr.arpa udp

Files

memory/232-0-0x0000000002180000-0x0000000002195000-memory.dmp

memory/232-1-0x00000000021A0000-0x00000000021A9000-memory.dmp

memory/2956-2-0x0000000000400000-0x0000000000409000-memory.dmp

memory/2956-3-0x0000000000400000-0x0000000000409000-memory.dmp

memory/232-4-0x0000000002180000-0x0000000002195000-memory.dmp

memory/2956-6-0x0000000000400000-0x0000000000409000-memory.dmp

memory/3188-5-0x0000000002200000-0x0000000002216000-memory.dmp

C:\Users\Admin\AppData\Roaming\iewucdv

MD5 ea676996230ba69c73e6dda4a710d36c
SHA1 f2bdd794d402fe4a0f23161c3d661a6f122311f3
SHA256 c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a
SHA512 8a459903117ee60b128429d3b73818981a0c6f676e6870e6672d1b81f66949128f11419c9564d3f0796fde8e138a04cfaa99221d4b670db3f610e8aef11b0852

C:\Users\Admin\AppData\Roaming\iewucdv

MD5 ea676996230ba69c73e6dda4a710d36c
SHA1 f2bdd794d402fe4a0f23161c3d661a6f122311f3
SHA256 c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a
SHA512 8a459903117ee60b128429d3b73818981a0c6f676e6870e6672d1b81f66949128f11419c9564d3f0796fde8e138a04cfaa99221d4b670db3f610e8aef11b0852

memory/1412-17-0x0000000000400000-0x0000000000409000-memory.dmp

C:\Users\Admin\AppData\Roaming\iewucdv

MD5 ea676996230ba69c73e6dda4a710d36c
SHA1 f2bdd794d402fe4a0f23161c3d661a6f122311f3
SHA256 c76fe7e5cfe5a94cc437f360f815b6f7c7eef063c528503e27e1d27a101f282a
SHA512 8a459903117ee60b128429d3b73818981a0c6f676e6870e6672d1b81f66949128f11419c9564d3f0796fde8e138a04cfaa99221d4b670db3f610e8aef11b0852

memory/3188-18-0x0000000002B80000-0x0000000002B96000-memory.dmp

memory/1412-19-0x0000000000400000-0x0000000000409000-memory.dmp