Malware Analysis Report

2025-01-02 11:13

Sample ID 240312-z4ngfada54
Target fe (2).exe
SHA256 1bb992ed6e0b7861afa33bca11cdb13b50dbcedcfd1c9fbb3551fbe805d795db
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

1bb992ed6e0b7861afa33bca11cdb13b50dbcedcfd1c9fbb3551fbe805d795db

Threat Level: Known bad

The file fe (2).exe was found to be: Known bad.

Malicious Activity Summary

smokeloader pub1 backdoor trojan

SmokeLoader

Executes dropped EXE

Deletes itself

Unsigned PE

Suspicious behavior: MapViewOfSection

Suspicious behavior: GetForegroundWindowSpam

Modifies registry class

Suspicious use of FindShellTrayWindow

Suspicious use of UnmapMainImage

Suspicious behavior: EnumeratesProcesses

Uses Task Scheduler COM API

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Checks SCSI registry key(s)

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-12 21:16

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-12 21:16

Reported

2024-03-12 21:28

Platform

win7-20240221-en

Max time kernel

600s

Max time network

365s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fe (2).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\avsdrdf N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\fe (2).exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\avsdrdf N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\avsdrdf N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\avsdrdf N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\fe (2).exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\fe (2).exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fe (2).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\fe (2).exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\avsdrdf N/A

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2696 wrote to memory of 2568 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\avsdrdf
PID 2696 wrote to memory of 2568 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\avsdrdf
PID 2696 wrote to memory of 2568 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\avsdrdf
PID 2696 wrote to memory of 2568 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\avsdrdf

Processes

C:\Users\Admin\AppData\Local\Temp\fe (2).exe

"C:\Users\Admin\AppData\Local\Temp\fe (2).exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {AB065038-10E9-495E-8E9A-9FF60FAC960B} S-1-5-21-3787592910-3720486031-2929222812-1000:HSNHLVYA\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\avsdrdf

C:\Users\Admin\AppData\Roaming\avsdrdf

Network

Country Destination Domain Proto
US 8.8.8.8:53 nidoe.org udp
AR 190.220.21.28:80 nidoe.org tcp
AR 190.220.21.28:80 nidoe.org tcp
AR 190.220.21.28:80 nidoe.org tcp
AR 190.220.21.28:80 nidoe.org tcp
AR 190.220.21.28:80 nidoe.org tcp
AR 190.220.21.28:80 nidoe.org tcp
AR 190.220.21.28:80 nidoe.org tcp
AR 190.220.21.28:80 nidoe.org tcp
AR 190.220.21.28:80 nidoe.org tcp
AR 190.220.21.28:80 nidoe.org tcp
AR 190.220.21.28:80 nidoe.org tcp

Files

memory/2672-1-0x00000000008A0000-0x00000000009A0000-memory.dmp

memory/2672-2-0x0000000000220000-0x000000000022B000-memory.dmp

memory/2672-3-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2672-5-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1264-4-0x0000000002A60000-0x0000000002A76000-memory.dmp

C:\Users\Admin\AppData\Roaming\avsdrdf

MD5 6252a112e0b7ec864abc4005b38d1077
SHA1 24374bebe039057efc1cd4d3a325580757530d2a
SHA256 1bb992ed6e0b7861afa33bca11cdb13b50dbcedcfd1c9fbb3551fbe805d795db
SHA512 e66c5f0a905abdebfed899b4ee9461bba10a54b940ca3218d31b89edc5bb6b990ab86873ec5dbf47d1e594cfb9a817ec733a6561e60e2a2c6491ac57b19ea4a9

memory/2568-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2568-14-0x00000000004E0000-0x00000000005E0000-memory.dmp

memory/2568-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1264-16-0x0000000002C50000-0x0000000002C66000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-12 21:16

Reported

2024-03-12 21:24

Platform

win10v2004-20240226-en

Max time kernel

342s

Max time network

342s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fe (2).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\bcitgtw N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\bcitgtw N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\bcitgtw N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\bcitgtw N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\fe (2).exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\fe (2).exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\fe (2).exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\ N/A N/A
Key created \REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\ N/A N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ N/A N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fe (2).exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fe (2).exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\bcitgtw 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
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\svchost.exe N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A
Token: SeShutdownPrivilege N/A N/A N/A
Token: SeCreatePagefilePrivilege N/A N/A N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
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Suspicious use of UnmapMainImage

Description Indicator Process Target
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Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\fe (2).exe

"C:\Users\Admin\AppData\Local\Temp\fe (2).exe"

C:\Users\Admin\AppData\Roaming\bcitgtw

C:\Users\Admin\AppData\Roaming\bcitgtw

C:\Windows\system32\rundll32.exe

"C:\Windows\system32\rundll32.exe" "C:\Windows\SYSTEM32\EDGEHTML.dll",#141 Microsoft.VCLibs.140.00_8wekyb3d8bbwe

C:\Windows\System32\svchost.exe

C:\Windows\System32\svchost.exe -k UnistackSvcGroup

Network

Country Destination Domain Proto
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 172.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 195.233.44.23.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 195.177.78.104.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 23.160.77.104.in-addr.arpa udp
US 8.8.8.8:53 209.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 145.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 nidoe.org udp
KR 211.171.233.126:80 nidoe.org tcp
KR 211.171.233.126:80 nidoe.org tcp
US 8.8.8.8:53 126.233.171.211.in-addr.arpa udp
KR 211.171.233.126:80 nidoe.org tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
KR 211.171.233.126:80 nidoe.org tcp
KR 211.171.233.126:80 nidoe.org tcp
KR 211.171.233.126:80 nidoe.org tcp
KR 211.171.233.126:80 nidoe.org tcp
KR 211.171.233.126:80 nidoe.org tcp
KR 211.171.233.126:80 nidoe.org tcp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
FR 20.199.58.43:443 tcp
GB 96.17.178.209:80 tcp
GB 104.77.160.23:80 tcp
KR 211.171.233.126:80 tcp
GB 96.17.178.209:80 tcp
GB 96.17.178.209:80 tcp
GB 96.17.178.209:80 tcp
GB 96.17.178.209:80 tcp
KR 211.171.233.126:80 tcp
GB 96.17.178.209:80 tcp
GB 96.17.178.209:80 tcp
GB 104.77.160.23:80 tcp
GB 104.77.160.23:80 tcp
PL 93.184.221.240:80 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
NL 52.111.243.29:443 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
N/A 20.74.47.205:443 tcp
N/A 20.74.47.205:443 tcp
N/A 20.74.47.205:443 tcp
US 8.8.8.8:53 udp
US 204.79.197.200:443 tcp
US 204.79.197.200:443 tcp
US 204.79.197.200:443 tcp
US 204.79.197.200:443 tcp
US 204.79.197.200:443 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 84.65.42.20.in-addr.arpa udp

Files

memory/4612-1-0x0000000000520000-0x0000000000620000-memory.dmp

memory/4612-2-0x00000000004C0000-0x00000000004CB000-memory.dmp

memory/4612-3-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3508-4-0x0000000002400000-0x0000000002416000-memory.dmp

memory/4612-5-0x0000000000400000-0x0000000000438000-memory.dmp

C:\Users\Admin\AppData\Roaming\bcitgtw

MD5 6252a112e0b7ec864abc4005b38d1077
SHA1 24374bebe039057efc1cd4d3a325580757530d2a
SHA256 1bb992ed6e0b7861afa33bca11cdb13b50dbcedcfd1c9fbb3551fbe805d795db
SHA512 e66c5f0a905abdebfed899b4ee9461bba10a54b940ca3218d31b89edc5bb6b990ab86873ec5dbf47d1e594cfb9a817ec733a6561e60e2a2c6491ac57b19ea4a9

memory/1836-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1836-14-0x0000000000740000-0x0000000000840000-memory.dmp

memory/1836-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3508-16-0x0000000002920000-0x0000000002936000-memory.dmp

memory/5060-37-0x00000128FA440000-0x00000128FA450000-memory.dmp

memory/5060-53-0x00000128FE9E0000-0x00000128FE9E1000-memory.dmp

memory/5060-55-0x00000128FEA00000-0x00000128FEA01000-memory.dmp

memory/5060-61-0x00000128FEA00000-0x00000128FEA01000-memory.dmp

memory/5060-62-0x00000128FEC00000-0x00000128FEC01000-memory.dmp

memory/5060-63-0x00000128FEC00000-0x00000128FEC01000-memory.dmp

memory/5060-60-0x00000128FEA00000-0x00000128FEA01000-memory.dmp

memory/5060-59-0x00000128FEA00000-0x00000128FEA01000-memory.dmp

memory/5060-65-0x00000128FE620000-0x00000128FE621000-memory.dmp

memory/5060-64-0x00000128FE630000-0x00000128FE631000-memory.dmp

memory/5060-58-0x00000128FEA00000-0x00000128FEA01000-memory.dmp

memory/5060-89-0x00000128FE880000-0x00000128FE881000-memory.dmp

memory/5060-88-0x00000128FE770000-0x00000128FE771000-memory.dmp

memory/5060-87-0x00000128FE770000-0x00000128FE771000-memory.dmp

memory/5060-85-0x00000128FE760000-0x00000128FE761000-memory.dmp

memory/5060-73-0x00000128FE560000-0x00000128FE561000-memory.dmp

memory/5060-70-0x00000128FE620000-0x00000128FE621000-memory.dmp

memory/5060-67-0x00000128FE630000-0x00000128FE631000-memory.dmp

memory/5060-57-0x00000128FEA00000-0x00000128FEA01000-memory.dmp

memory/5060-56-0x00000128FEA00000-0x00000128FEA01000-memory.dmp

memory/5060-54-0x00000128FEA00000-0x00000128FEA01000-memory.dmp

memory/5060-21-0x00000128FA340000-0x00000128FA350000-memory.dmp