Malware Analysis Report

2024-11-13 18:57

Sample ID 240219-adkkesfh31
Target e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd
SHA256 e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd
Tags
smokeloader pub3 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

e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd

Threat Level: Known bad

The file e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd was found to be: Known bad.

Malicious Activity Summary

smokeloader pub3 backdoor trojan

SmokeLoader

Deletes itself

Executes dropped EXE

Unsigned PE

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Checks SCSI registry key(s)

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-19 00:05

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-19 00:05

Reported

2024-02-19 00:10

Platform

win7-20231215-en

Max time kernel

300s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.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\ciifgtu 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\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\ciifgtu N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\ciifgtu N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\ciifgtu N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\ciifgtu 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 2952 wrote to memory of 1716 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\ciifgtu
PID 2952 wrote to memory of 1716 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\ciifgtu
PID 2952 wrote to memory of 1716 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\ciifgtu
PID 2952 wrote to memory of 1716 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\ciifgtu

Processes

C:\Users\Admin\AppData\Local\Temp\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.exe

"C:\Users\Admin\AppData\Local\Temp\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {189493B3-9750-4FF3-BE8C-0572A1BBBE27} S-1-5-21-3818056530-936619650-3554021955-1000:SFVRQGEO\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\ciifgtu

C:\Users\Admin\AppData\Roaming\ciifgtu

Network

Country Destination Domain Proto
US 8.8.8.8:53 sjyey.com udp
KR 175.119.10.231:80 sjyey.com tcp
KR 175.119.10.231:80 sjyey.com tcp
KR 175.119.10.231:80 sjyey.com tcp
KR 175.119.10.231:80 sjyey.com tcp
KR 175.119.10.231:80 sjyey.com tcp
KR 175.119.10.231:80 sjyey.com tcp
KR 175.119.10.231:80 sjyey.com tcp

Files

memory/2052-1-0x00000000005F0000-0x00000000006F0000-memory.dmp

memory/2052-2-0x0000000000220000-0x000000000022B000-memory.dmp

memory/2052-3-0x0000000000400000-0x000000000044A000-memory.dmp

memory/2052-5-0x0000000000400000-0x000000000044A000-memory.dmp

memory/1188-4-0x0000000002D40000-0x0000000002D56000-memory.dmp

C:\Users\Admin\AppData\Roaming\ciifgtu

MD5 7c376aee2b6cbf0e428d06ddcfca9b07
SHA1 da5068dc6f5b6e72b4c440c0b6213fc4aaca9c70
SHA256 e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd
SHA512 f49cbe26ff3ab729914071aa736f7673e2423e4f78d76f0e2617e8c276e8b4fca955213b9280859bc4f91ac4683845fc03ac9b4421d8fdbf233ccfad14a1bc33

memory/1716-14-0x0000000000270000-0x0000000000370000-memory.dmp

memory/1716-15-0x0000000000400000-0x000000000044A000-memory.dmp

memory/1188-16-0x0000000002490000-0x00000000024A6000-memory.dmp

memory/1716-19-0x0000000000400000-0x000000000044A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-19 00:05

Reported

2024-02-19 00:10

Platform

win10-20240214-en

Max time kernel

300s

Max time network

294s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.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\cftgviw 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\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\cftgviw N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\cftgviw N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\cftgviw N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\cftgviw 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\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.exe

"C:\Users\Admin\AppData\Local\Temp\e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd.exe"

C:\Users\Admin\AppData\Roaming\cftgviw

C:\Users\Admin\AppData\Roaming\cftgviw

Network

Country Destination Domain Proto
US 8.8.8.8:53 sjyey.com udp
KR 211.168.53.110:80 sjyey.com tcp
KR 211.168.53.110:80 sjyey.com tcp
US 8.8.8.8:53 110.53.168.211.in-addr.arpa udp
KR 211.168.53.110:80 sjyey.com tcp
KR 211.168.53.110:80 sjyey.com tcp
KR 211.168.53.110:80 sjyey.com tcp
KR 211.168.53.110:80 sjyey.com tcp
KR 211.168.53.110:80 sjyey.com tcp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 11.179.89.13.in-addr.arpa udp
US 8.8.8.8:53 209.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 219.135.221.88.in-addr.arpa udp

Files

memory/2536-1-0x00000000006D0000-0x00000000007D0000-memory.dmp

memory/2536-2-0x00000000004B0000-0x00000000004BB000-memory.dmp

memory/2536-3-0x0000000000400000-0x000000000044A000-memory.dmp

memory/3404-4-0x0000000000B30000-0x0000000000B46000-memory.dmp

memory/2536-5-0x0000000000400000-0x000000000044A000-memory.dmp

C:\Users\Admin\AppData\Roaming\cftgviw

MD5 7c376aee2b6cbf0e428d06ddcfca9b07
SHA1 da5068dc6f5b6e72b4c440c0b6213fc4aaca9c70
SHA256 e51cbc1ad281483bfad92ced80e1f4e673226b63cbc85b79108c2c9d86962cbd
SHA512 f49cbe26ff3ab729914071aa736f7673e2423e4f78d76f0e2617e8c276e8b4fca955213b9280859bc4f91ac4683845fc03ac9b4421d8fdbf233ccfad14a1bc33

memory/3264-14-0x00000000006D0000-0x00000000007D0000-memory.dmp

memory/3264-15-0x0000000000400000-0x000000000044A000-memory.dmp

memory/3404-16-0x0000000002910000-0x0000000002926000-memory.dmp

memory/3264-17-0x0000000000400000-0x000000000044A000-memory.dmp