Malware Analysis Report

2025-08-06 03:42

Sample ID 230922-tdcpcsha9y
Target 82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08
SHA256 82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08
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

82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08

Threat Level: Known bad

The file 82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08 was found to be: Known bad.

Malicious Activity Summary

smokeloader pub1 backdoor trojan

SmokeLoader

Executes dropped EXE

Suspicious use of SetThreadContext

Unsigned PE

Checks SCSI registry key(s)

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

Uses Task Scheduler COM API

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-09-22 15:56

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-09-22 15:56

Reported

2023-09-22 15:58

Platform

win10v2004-20230915-en

Max time kernel

150s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Executes dropped EXE

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

Checks SCSI registry key(s)

Description Indicator Process Target
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\bfcrcbi N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\bfcrcbi N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\bfcrcbi N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.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\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\bfcrcbi 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 2224 wrote to memory of 972 N/A C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe
PID 2224 wrote to memory of 972 N/A C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe
PID 2224 wrote to memory of 972 N/A C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe
PID 2224 wrote to memory of 972 N/A C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe
PID 2224 wrote to memory of 972 N/A C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe
PID 2224 wrote to memory of 972 N/A C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe
PID 4992 wrote to memory of 1808 N/A C:\Users\Admin\AppData\Roaming\bfcrcbi C:\Users\Admin\AppData\Roaming\bfcrcbi
PID 4992 wrote to memory of 1808 N/A C:\Users\Admin\AppData\Roaming\bfcrcbi C:\Users\Admin\AppData\Roaming\bfcrcbi
PID 4992 wrote to memory of 1808 N/A C:\Users\Admin\AppData\Roaming\bfcrcbi C:\Users\Admin\AppData\Roaming\bfcrcbi
PID 4992 wrote to memory of 1808 N/A C:\Users\Admin\AppData\Roaming\bfcrcbi C:\Users\Admin\AppData\Roaming\bfcrcbi
PID 4992 wrote to memory of 1808 N/A C:\Users\Admin\AppData\Roaming\bfcrcbi C:\Users\Admin\AppData\Roaming\bfcrcbi
PID 4992 wrote to memory of 1808 N/A C:\Users\Admin\AppData\Roaming\bfcrcbi C:\Users\Admin\AppData\Roaming\bfcrcbi

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe

"C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe"

C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe

"C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe"

C:\Users\Admin\AppData\Roaming\bfcrcbi

C:\Users\Admin\AppData\Roaming\bfcrcbi

C:\Users\Admin\AppData\Roaming\bfcrcbi

C:\Users\Admin\AppData\Roaming\bfcrcbi

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 68.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 1.208.79.178.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 8.3.197.209.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 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 1.202.248.87.in-addr.arpa udp
US 8.8.8.8:53 35.197.79.40.in-addr.arpa udp

Files

memory/2224-0-0x00000000005B0000-0x00000000005C5000-memory.dmp

memory/2224-1-0x00000000005D0000-0x00000000005D9000-memory.dmp

memory/972-2-0x0000000000400000-0x0000000000409000-memory.dmp

memory/2224-4-0x00000000005B0000-0x00000000005C5000-memory.dmp

memory/972-3-0x0000000000400000-0x0000000000409000-memory.dmp

memory/972-6-0x0000000000400000-0x0000000000409000-memory.dmp

memory/3116-5-0x00000000008B0000-0x00000000008C6000-memory.dmp

C:\Users\Admin\AppData\Roaming\bfcrcbi

MD5 c1f257065788ec87d854c19262f60e2d
SHA1 d6f451114cc0a397b8e4ec8fa656ea167f1ed42d
SHA256 82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08
SHA512 6557a074a6e646d11b0dcb0d438ff2b819f32c47e9a0d761dcdbe973c8235702221a5b384a7b5a1c75c97f974ba51dab58d9216a3c779cc7ead436b79b8f6343

C:\Users\Admin\AppData\Roaming\bfcrcbi

MD5 c1f257065788ec87d854c19262f60e2d
SHA1 d6f451114cc0a397b8e4ec8fa656ea167f1ed42d
SHA256 82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08
SHA512 6557a074a6e646d11b0dcb0d438ff2b819f32c47e9a0d761dcdbe973c8235702221a5b384a7b5a1c75c97f974ba51dab58d9216a3c779cc7ead436b79b8f6343

C:\Users\Admin\AppData\Roaming\bfcrcbi

MD5 c1f257065788ec87d854c19262f60e2d
SHA1 d6f451114cc0a397b8e4ec8fa656ea167f1ed42d
SHA256 82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08
SHA512 6557a074a6e646d11b0dcb0d438ff2b819f32c47e9a0d761dcdbe973c8235702221a5b384a7b5a1c75c97f974ba51dab58d9216a3c779cc7ead436b79b8f6343

memory/1808-17-0x0000000000400000-0x0000000000409000-memory.dmp

memory/3116-18-0x00000000008D0000-0x00000000008E6000-memory.dmp

memory/1808-21-0x0000000000400000-0x0000000000409000-memory.dmp