Malware Analysis Report

2025-08-05 12:28

Sample ID 230923-ayr51aba9z
Target d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f
SHA256 d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f

Threat Level: Known bad

The file d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f was found to be: Known bad.

Malicious Activity Summary

smokeloader pub1 backdoor trojan

SmokeLoader

Executes dropped EXE

Deletes itself

Unsigned PE

Uses Task Scheduler COM API

Suspicious use of FindShellTrayWindow

Suspicious use of AdjustPrivilegeToken

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

Checks SCSI registry key(s)

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-09-23 00:37

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-09-23 00:37

Reported

2023-09-23 00:42

Platform

win7-20230831-en

Max time kernel

300s

Max time network

127s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.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\btdsubi 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\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\btdsubi N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\btdsubi N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\btdsubi N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.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\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\btdsubi N/A

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A N/A N/A
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Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A N/A N/A
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Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2516 wrote to memory of 2484 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\btdsubi
PID 2516 wrote to memory of 2484 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\btdsubi
PID 2516 wrote to memory of 2484 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\btdsubi
PID 2516 wrote to memory of 2484 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\btdsubi

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.exe

"C:\Users\Admin\AppData\Local\Temp\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {3A6C3C67-931B-4F29-B277-5503DF772455} S-1-5-21-3513876443-2771975297-1923446376-1000:GPFFWLPI\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\btdsubi

C:\Users\Admin\AppData\Roaming\btdsubi

Network

Country Destination Domain Proto
US 8.8.8.8:53 gudintas.at udp
UZ 195.158.3.162:80 gudintas.at tcp
UZ 195.158.3.162:80 gudintas.at tcp
UZ 195.158.3.162:80 gudintas.at tcp
UZ 195.158.3.162:80 gudintas.at tcp
UZ 195.158.3.162:80 gudintas.at tcp
UZ 195.158.3.162:80 gudintas.at tcp
UZ 195.158.3.162:80 gudintas.at tcp
UZ 195.158.3.162:80 gudintas.at tcp
UZ 195.158.3.162:80 gudintas.at tcp
UZ 195.158.3.162:80 gudintas.at tcp
UZ 195.158.3.162:80 gudintas.at tcp
UZ 195.158.3.162:80 gudintas.at tcp
UZ 195.158.3.162:80 gudintas.at tcp
UZ 195.158.3.162:80 gudintas.at tcp
UZ 195.158.3.162:80 gudintas.at tcp
UZ 195.158.3.162:80 gudintas.at tcp
UZ 195.158.3.162:80 gudintas.at tcp

Files

memory/2408-0-0x0000000000220000-0x0000000000235000-memory.dmp

memory/2408-1-0x0000000000240000-0x0000000000249000-memory.dmp

memory/2408-2-0x0000000000400000-0x000000000043C000-memory.dmp

memory/2408-4-0x0000000000400000-0x000000000043C000-memory.dmp

memory/1336-3-0x0000000002730000-0x0000000002746000-memory.dmp

memory/2408-8-0x0000000000220000-0x0000000000235000-memory.dmp

memory/2408-7-0x0000000000240000-0x0000000000249000-memory.dmp

memory/1336-9-0x000007FEF6230000-0x000007FEF6373000-memory.dmp

memory/1336-10-0x000007FEC3380000-0x000007FEC338A000-memory.dmp

memory/1336-14-0x000007FEF6230000-0x000007FEF6373000-memory.dmp

memory/1336-15-0x000007FEC3380000-0x000007FEC338A000-memory.dmp

C:\Users\Admin\AppData\Roaming\btdsubi

MD5 f84d9531222b555aad876986d97c897c
SHA1 5819b4fba849f0e021c5f007f911bd3f56b8bc2a
SHA256 d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f
SHA512 4c30058d9ef4fd49880f73ec0a61da5da85640d6b6c6662b1fc4d5c2f9003d42f219bfc54d48eb5d0da30badafc0121f7428a6218104806b923258c3c83ceb31

C:\Users\Admin\AppData\Roaming\btdsubi

MD5 f84d9531222b555aad876986d97c897c
SHA1 5819b4fba849f0e021c5f007f911bd3f56b8bc2a
SHA256 d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f
SHA512 4c30058d9ef4fd49880f73ec0a61da5da85640d6b6c6662b1fc4d5c2f9003d42f219bfc54d48eb5d0da30badafc0121f7428a6218104806b923258c3c83ceb31

memory/2484-18-0x0000000000400000-0x000000000043C000-memory.dmp

memory/1336-19-0x0000000002C40000-0x0000000002C56000-memory.dmp

memory/2484-20-0x0000000000400000-0x000000000043C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-09-23 00:37

Reported

2023-09-23 00:43

Platform

win10-20230915-en

Max time kernel

309s

Max time network

301s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.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\vfrujts N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\vfrujts N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\vfrujts N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\vfrujts N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.exe N/A
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Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\vfrujts 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

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.exe

"C:\Users\Admin\AppData\Local\Temp\d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f.exe"

C:\Users\Admin\AppData\Roaming\vfrujts

C:\Users\Admin\AppData\Roaming\vfrujts

Network

Country Destination Domain Proto
US 8.8.8.8:53 gudintas.at udp
KR 211.171.233.126:80 gudintas.at tcp
KR 211.171.233.126:80 gudintas.at tcp
US 8.8.8.8:53 126.233.171.211.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp
KR 211.171.233.126:80 gudintas.at tcp
KR 211.171.233.126:80 gudintas.at tcp
KR 211.171.233.126:80 gudintas.at tcp
KR 211.171.233.126:80 gudintas.at tcp
KR 211.171.233.126:80 gudintas.at tcp
KR 211.171.233.126:80 gudintas.at tcp
KR 211.171.233.126:80 gudintas.at tcp
KR 211.171.233.126:80 gudintas.at tcp
KR 211.171.233.126:80 gudintas.at tcp
KR 211.171.233.126:80 gudintas.at tcp
KR 211.171.233.126:80 gudintas.at tcp
KR 211.171.233.126:80 gudintas.at tcp
KR 211.171.233.126:80 gudintas.at tcp
KR 211.171.233.126:80 gudintas.at tcp
KR 211.171.233.126:80 gudintas.at tcp
US 8.8.8.8:53 50.192.11.51.in-addr.arpa udp
US 8.8.8.8:53 254.211.247.8.in-addr.arpa udp

Files

memory/1988-0-0x0000000000580000-0x0000000000595000-memory.dmp

memory/1988-1-0x00000000001C0000-0x00000000001C9000-memory.dmp

memory/1988-2-0x0000000000400000-0x000000000043C000-memory.dmp

memory/3248-3-0x00000000014F0000-0x0000000001506000-memory.dmp

memory/1988-4-0x0000000000400000-0x000000000043C000-memory.dmp

memory/1988-8-0x0000000000580000-0x0000000000595000-memory.dmp

memory/1988-7-0x00000000001C0000-0x00000000001C9000-memory.dmp

C:\Users\Admin\AppData\Roaming\vfrujts

MD5 f84d9531222b555aad876986d97c897c
SHA1 5819b4fba849f0e021c5f007f911bd3f56b8bc2a
SHA256 d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f
SHA512 4c30058d9ef4fd49880f73ec0a61da5da85640d6b6c6662b1fc4d5c2f9003d42f219bfc54d48eb5d0da30badafc0121f7428a6218104806b923258c3c83ceb31

C:\Users\Admin\AppData\Roaming\vfrujts

MD5 f84d9531222b555aad876986d97c897c
SHA1 5819b4fba849f0e021c5f007f911bd3f56b8bc2a
SHA256 d776c69b12a9a00498f9a912cf1d888fe092c3eeb31b9736736607d3b1601c5f
SHA512 4c30058d9ef4fd49880f73ec0a61da5da85640d6b6c6662b1fc4d5c2f9003d42f219bfc54d48eb5d0da30badafc0121f7428a6218104806b923258c3c83ceb31

memory/5000-14-0x0000000000400000-0x000000000043C000-memory.dmp

memory/3248-15-0x0000000002F30000-0x0000000002F46000-memory.dmp

memory/5000-16-0x0000000000400000-0x000000000043C000-memory.dmp