Malware Analysis Report

2025-08-05 12:28

Sample ID 230923-aydbvaba8z
Target 79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de
SHA256 79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de
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

79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de

Threat Level: Known bad

The file 79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de was found to be: Known bad.

Malicious Activity Summary

smokeloader pub1 backdoor trojan

SmokeLoader

Deletes itself

Executes dropped EXE

Unsigned PE

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Uses Task Scheduler COM API

Checks SCSI registry key(s)

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-09-23 00:36

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-09-23 00:36

Reported

2023-09-23 00:42

Platform

win7-20230831-en

Max time kernel

328s

Max time network

324s

Command Line

"C:\Users\Admin\AppData\Local\Temp\79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Deletes itself

Description Indicator Process Target
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Executes dropped EXE

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

Checks SCSI registry key(s)

Description Indicator Process Target
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\bdftcgh N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\bdftcgh N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\bdftcgh N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de.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\79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\bdftcgh N/A

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2728 wrote to memory of 2528 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\bdftcgh
PID 2728 wrote to memory of 2528 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\bdftcgh
PID 2728 wrote to memory of 2528 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\bdftcgh
PID 2728 wrote to memory of 2528 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\bdftcgh

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de.exe

"C:\Users\Admin\AppData\Local\Temp\79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {40F53409-8588-4DE2-BBC1-D791ED661A35} S-1-5-21-3750544865-3773649541-1858556521-1000:XOCYHKRS\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\bdftcgh

C:\Users\Admin\AppData\Roaming\bdftcgh

Network

Country Destination Domain Proto
US 8.8.8.8:53 gudintas.at udp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp
AR 186.13.17.220:80 gudintas.at tcp

Files

memory/2808-0-0x0000000000220000-0x0000000000235000-memory.dmp

memory/2808-1-0x0000000000240000-0x0000000000249000-memory.dmp

memory/2808-2-0x0000000000400000-0x000000000043E000-memory.dmp

memory/2808-3-0x0000000000400000-0x000000000043E000-memory.dmp

memory/2808-4-0x0000000000220000-0x0000000000235000-memory.dmp

memory/2808-6-0x0000000000400000-0x000000000043E000-memory.dmp

memory/1208-5-0x0000000002E80000-0x0000000002E96000-memory.dmp

memory/2808-9-0x0000000000240000-0x0000000000249000-memory.dmp

C:\Users\Admin\AppData\Roaming\bdftcgh

MD5 05a6b123f8ab7eaaeb40621f079bae87
SHA1 2bebec5327c4411bb975b69cd92457f55111cfd1
SHA256 79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de
SHA512 5be23582b62c25614b6007941520bc751801594ba29617875159a7d588eb1e34e747ef4a5236edf9d5f8c5caa2e20d50a99bc0d50b6356a1673dff5ef0785fa5

C:\Users\Admin\AppData\Roaming\bdftcgh

MD5 05a6b123f8ab7eaaeb40621f079bae87
SHA1 2bebec5327c4411bb975b69cd92457f55111cfd1
SHA256 79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de
SHA512 5be23582b62c25614b6007941520bc751801594ba29617875159a7d588eb1e34e747ef4a5236edf9d5f8c5caa2e20d50a99bc0d50b6356a1673dff5ef0785fa5

memory/2528-15-0x0000000000400000-0x000000000043E000-memory.dmp

memory/2528-17-0x0000000000400000-0x000000000043E000-memory.dmp

memory/1208-16-0x0000000002DB0000-0x0000000002DC6000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-09-23 00:36

Reported

2023-09-23 00:42

Platform

win10-20230915-en

Max time kernel

300s

Max time network

299s

Command Line

"C:\Users\Admin\AppData\Local\Temp\79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de.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\rucujcv 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\79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\rucujcv N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\rucujcv N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\rucujcv N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de.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\79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\rucujcv 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\79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de.exe

"C:\Users\Admin\AppData\Local\Temp\79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de.exe"

C:\Users\Admin\AppData\Roaming\rucujcv

C:\Users\Admin\AppData\Roaming\rucujcv

Network

Country Destination Domain Proto
US 8.8.8.8:53 gudintas.at udp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
US 8.8.8.8:53 79.216.224.84.in-addr.arpa udp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
HU 84.224.216.79:80 gudintas.at tcp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 50.192.11.51.in-addr.arpa udp
US 8.8.8.8:53 108.211.229.192.in-addr.arpa udp
US 8.8.8.8:53 240.81.21.72.in-addr.arpa udp

Files

memory/3464-0-0x00000000004A0000-0x00000000004B5000-memory.dmp

memory/3464-1-0x00000000004C0000-0x00000000004C9000-memory.dmp

memory/3464-2-0x0000000000400000-0x000000000043E000-memory.dmp

memory/3232-3-0x00000000010C0000-0x00000000010D6000-memory.dmp

memory/3464-4-0x0000000000400000-0x000000000043E000-memory.dmp

memory/3464-7-0x00000000004C0000-0x00000000004C9000-memory.dmp

memory/3464-8-0x00000000004A0000-0x00000000004B5000-memory.dmp

C:\Users\Admin\AppData\Roaming\rucujcv

MD5 05a6b123f8ab7eaaeb40621f079bae87
SHA1 2bebec5327c4411bb975b69cd92457f55111cfd1
SHA256 79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de
SHA512 5be23582b62c25614b6007941520bc751801594ba29617875159a7d588eb1e34e747ef4a5236edf9d5f8c5caa2e20d50a99bc0d50b6356a1673dff5ef0785fa5

C:\Users\Admin\AppData\Roaming\rucujcv

MD5 05a6b123f8ab7eaaeb40621f079bae87
SHA1 2bebec5327c4411bb975b69cd92457f55111cfd1
SHA256 79a62aa738291f15636bfdd41733c557467f5cc848ab47e0265dc30c34ff73de
SHA512 5be23582b62c25614b6007941520bc751801594ba29617875159a7d588eb1e34e747ef4a5236edf9d5f8c5caa2e20d50a99bc0d50b6356a1673dff5ef0785fa5

memory/4476-14-0x0000000000400000-0x000000000043E000-memory.dmp

memory/3232-15-0x0000000002FB0000-0x0000000002FC6000-memory.dmp

memory/4476-16-0x0000000000400000-0x000000000043E000-memory.dmp