Malware Analysis Report

2024-11-13 18:56

Sample ID 240223-fejx6sbb4y
Target 04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840
SHA256 04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840
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

04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840

Threat Level: Known bad

The file 04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840 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

Suspicious use of AdjustPrivilegeToken

Uses Task Scheduler COM API

Checks SCSI registry key(s)

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-23 04:47

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-23 04:47

Reported

2024-02-23 04:52

Platform

win7-20240220-en

Max time kernel

300s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.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\atvwhwe N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\atvwhwe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\atvwhwe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\atvwhwe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.exe N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
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\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\atvwhwe 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 1648 wrote to memory of 2440 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\atvwhwe
PID 1648 wrote to memory of 2440 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\atvwhwe
PID 1648 wrote to memory of 2440 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\atvwhwe
PID 1648 wrote to memory of 2440 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\atvwhwe

Processes

C:\Users\Admin\AppData\Local\Temp\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.exe

"C:\Users\Admin\AppData\Local\Temp\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {67514099-05AB-4FE3-88F8-7146F0446CD9} S-1-5-21-2721934792-624042501-2768869379-1000:BISMIZHX\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\atvwhwe

C:\Users\Admin\AppData\Roaming\atvwhwe

Network

Country Destination Domain Proto
US 8.8.8.8:53 sjyey.com udp
AR 186.13.17.220:80 sjyey.com tcp
AR 186.13.17.220:80 sjyey.com tcp
AR 186.13.17.220:80 sjyey.com tcp
AR 186.13.17.220:80 sjyey.com tcp
AR 186.13.17.220:80 sjyey.com tcp
AR 186.13.17.220:80 sjyey.com tcp
AR 186.13.17.220:80 sjyey.com tcp
AR 186.13.17.220:80 sjyey.com tcp
AR 186.13.17.220:80 sjyey.com tcp

Files

memory/2924-1-0x0000000000230000-0x0000000000330000-memory.dmp

memory/2924-2-0x0000000000400000-0x00000000022CA000-memory.dmp

memory/2924-3-0x00000000003A0000-0x00000000003AB000-memory.dmp

memory/1064-4-0x0000000002AD0000-0x0000000002AE6000-memory.dmp

memory/2924-5-0x0000000000400000-0x00000000022CA000-memory.dmp

C:\Users\Admin\AppData\Roaming\atvwhwe

MD5 d7396862e257bd1cd7e8741eb543f147
SHA1 73a69269e5fdd90df5e1a470d8bb032ea562ad7a
SHA256 04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840
SHA512 44b5a79bebc0e972baa76d408c5107b8eeafba6d722968f74367b12e3290c645e4c6746c8ab4b2362cef03516760b393e5f9477cb5152034f4c85614c1c2b435

memory/2440-14-0x0000000002410000-0x0000000002510000-memory.dmp

memory/2440-15-0x0000000000400000-0x00000000022CA000-memory.dmp

memory/1064-16-0x0000000002970000-0x0000000002986000-memory.dmp

memory/2440-17-0x0000000000400000-0x00000000022CA000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-23 04:47

Reported

2024-02-23 04:52

Platform

win10-20240214-en

Max time kernel

300s

Max time network

261s

Command Line

"C:\Users\Admin\AppData\Local\Temp\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.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\ssucvgh 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\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\ssucvgh N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\ssucvgh N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\ssucvgh N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.exe N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
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\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\ssucvgh 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\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.exe

"C:\Users\Admin\AppData\Local\Temp\04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840.exe"

C:\Users\Admin\AppData\Roaming\ssucvgh

C:\Users\Admin\AppData\Roaming\ssucvgh

Network

Country Destination Domain Proto
US 8.8.8.8:53 sjyey.com udp
KR 210.182.29.70:80 sjyey.com tcp
US 8.8.8.8:53 70.29.182.210.in-addr.arpa udp
KR 210.182.29.70:80 sjyey.com tcp
KR 210.182.29.70:80 sjyey.com tcp
KR 210.182.29.70:80 sjyey.com tcp
KR 210.182.29.70:80 sjyey.com tcp
KR 210.182.29.70:80 sjyey.com tcp
KR 210.182.29.70:80 sjyey.com tcp
KR 210.182.29.70:80 sjyey.com tcp
KR 210.182.29.70:80 sjyey.com tcp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp

Files

memory/764-1-0x00000000023F0000-0x00000000024F0000-memory.dmp

memory/764-2-0x0000000002330000-0x000000000233B000-memory.dmp

memory/764-3-0x0000000000400000-0x00000000022CA000-memory.dmp

memory/3308-4-0x0000000001090000-0x00000000010A6000-memory.dmp

memory/764-5-0x0000000000400000-0x00000000022CA000-memory.dmp

C:\Users\Admin\AppData\Roaming\ssucvgh

MD5 d7396862e257bd1cd7e8741eb543f147
SHA1 73a69269e5fdd90df5e1a470d8bb032ea562ad7a
SHA256 04b9dd522381f5c4d44fe5c321e963bea56e47841d8da727bcd408aa6fd05840
SHA512 44b5a79bebc0e972baa76d408c5107b8eeafba6d722968f74367b12e3290c645e4c6746c8ab4b2362cef03516760b393e5f9477cb5152034f4c85614c1c2b435

memory/1520-14-0x00000000025A0000-0x00000000026A0000-memory.dmp

memory/1520-15-0x0000000000400000-0x00000000022CA000-memory.dmp

memory/3308-16-0x0000000002FF0000-0x0000000003006000-memory.dmp

memory/1520-19-0x0000000000400000-0x00000000022CA000-memory.dmp