Malware Analysis Report

2024-12-08 00:49

Sample ID 231228-f387zaafa8
Target c75b4dca6b8b6a0dc76cd086ebce080c
SHA256 85fd0d293f29d7846d05f287a36ccf3306dde237d6da30afd89d9f04609bced0
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

85fd0d293f29d7846d05f287a36ccf3306dde237d6da30afd89d9f04609bced0

Threat Level: Known bad

The file c75b4dca6b8b6a0dc76cd086ebce080c was found to be: Known bad.

Malicious Activity Summary

smokeloader pub3 backdoor trojan

SmokeLoader

Loads dropped DLL

Deletes itself

Program crash

Unsigned PE

Suspicious use of SendNotifyMessage

Uses Task Scheduler COM API

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Checks SCSI registry key(s)

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-28 05:25

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-28 05:25

Reported

2024-01-08 06:40

Platform

win10v2004-20231222-en

Max time kernel

81s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Deletes itself

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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe 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\c75b4dca6b8b6a0dc76cd086ebce080c.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe 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\c75b4dca6b8b6a0dc76cd086ebce080c.exe

"C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1584 -ip 1584

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1584 -s 392

C:\Users\Admin\AppData\Roaming\wbcctbf

C:\Users\Admin\AppData\Roaming\wbcctbf

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4804 -s 392

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4804 -ip 4804

Network

Country Destination Domain Proto
US 8.8.8.8:53 148.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 61.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
N/A 40.68.123.157:443 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
N/A 40.68.123.157:443 tcp
US 8.8.8.8:53 udp
N/A 51.124.78.146:443 tcp
US 8.8.8.8:53 udp
N/A 40.68.123.157:443 tcp
US 8.8.8.8:53 udp
N/A 52.165.164.15:443 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
SG 172.104.187.4:80 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
N/A 51.124.78.146:443 tcp
N/A 89.19.30.75:80 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
GB 88.221.134.50:80 tcp
US 8.8.8.8:53 udp
N/A 51.124.78.146:443 tcp
US 8.8.8.8:53 udp
N/A 92.123.241.104:80 tcp
US 8.8.8.8:53 udp
N/A 40.68.123.157:443 tcp
US 8.8.8.8:53 udp
N/A 192.64.119.13:80 tcp
N/A 52.165.164.15:443 tcp
N/A 92.123.241.104:80 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
N/A 40.68.123.157:443 tcp
US 8.8.8.8:53 udp
GB 88.221.134.50:80 tcp
N/A 40.68.123.157:443 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
N/A 91.195.240.19:80 tcp
US 8.8.8.8:53 udp
GB 87.248.205.0:80 tcp
US 8.8.8.8:53 udp
N/A 20.54.110.119:443 tcp
N/A 52.165.164.15:443 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
GB 88.221.134.50:80 tcp
N/A 138.91.171.81:80 tcp
GB 87.248.205.0:80 tcp
GB 87.248.205.0:80 tcp
GB 87.248.205.0:80 tcp
GB 87.248.205.0:80 tcp
US 8.8.8.8:53 udp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 8.8.8.8:53 udp
GB 88.221.134.50:80 tcp
GB 87.248.205.0:80 tcp
GB 87.248.205.0:80 tcp
US 93.184.221.240:80 tcp
GB 88.221.134.50:80 tcp
GB 87.248.205.0:80 tcp
US 8.8.8.8:53 udp
GB 87.248.205.0:80 tcp
GB 87.248.205.0:80 tcp
US 93.184.221.240:80 tcp
GB 87.248.205.0:80 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
US 93.184.221.240:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
US 8.8.8.8:53 udp
GB 96.17.178.173:80 tcp
GB 96.17.178.173:80 tcp
US 8.8.8.8:53 udp
GB 96.17.178.173:80 tcp
NL 20.31.169.57:443 tcp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
NL 20.31.169.57:443 tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
NL 20.31.169.57:443 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
US 8.8.8.8:53 udp
N/A 20.74.47.205:443 tcp
GB 88.221.134.50:80 tcp
US 8.8.8.8:53 udp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp
GB 88.221.134.50:80 tcp

Files

memory/1584-3-0x0000000002E20000-0x0000000002E29000-memory.dmp

memory/1584-1-0x0000000002EB0000-0x0000000002FB0000-memory.dmp

memory/1584-7-0x0000000000400000-0x0000000002B7B000-memory.dmp

memory/3472-8-0x00000000025F0000-0x0000000002605000-memory.dmp

memory/1584-11-0x0000000000400000-0x0000000002B7B000-memory.dmp

memory/4804-23-0x0000000002E70000-0x0000000002F70000-memory.dmp

memory/4804-24-0x0000000000400000-0x0000000002B7B000-memory.dmp

memory/3472-25-0x0000000002000000-0x0000000002015000-memory.dmp

memory/4804-28-0x0000000000400000-0x0000000002B7B000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-28 05:25

Reported

2024-01-08 06:40

Platform

win7-20231129-en

Max time kernel

97s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Deletes itself

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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe N/A

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Roaming\tcjvcrg

Checks SCSI registry key(s)

Description Indicator Process Target
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A N/A N/A
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Suspicious use of SendNotifyMessage

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

C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe

"C:\Users\Admin\AppData\Local\Temp\c75b4dca6b8b6a0dc76cd086ebce080c.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {26CAE043-CB86-4B8F-963D-2C6FB5698692} S-1-5-21-3470981204-343661084-3367201002-1000:GLTGRJAG\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\tcjvcrg

C:\Users\Admin\AppData\Roaming\tcjvcrg

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 960 -s 124

Network

Country Destination Domain Proto
US 8.8.8.8:53 conceitosseg.com udp
US 8.8.8.8:53 integrasidata.com udp
SG 172.104.187.4:80 integrasidata.com tcp
US 8.8.8.8:53 ozentekstil.com udp
TR 89.19.30.75:80 ozentekstil.com tcp
TR 89.19.30.75:80 ozentekstil.com tcp
US 8.8.8.8:53 finbelportal.com udp
US 8.8.8.8:53 telanganadigital.com udp
US 192.64.119.13:80 telanganadigital.com tcp
US 8.8.8.8:53 www.telanganadigital.com udp
DE 91.195.240.19:80 www.telanganadigital.com tcp

Files

\Users\Admin\AppData\Local\Temp\CC4F.tmp

MD5 36ca5b2daa4e58c5615ac1a9a7a6b699
SHA1 8f67423a5862010a80442cd5680bfe685cec6248
SHA256 7c88ded1744ecd06994f0bf0301b62197bdd44be4367b9f7202c11c2f8e1c7c1
SHA512 4a8d1f18ab11636817e3601674490fa5659b5fc0f01ef97251d53b21b780fdc0a49d1d540eca81859bd0d51a4d93b3c2f77e900313235f22f15cf23e00be4d39

memory/2988-3-0x0000000000220000-0x0000000000229000-memory.dmp

memory/2988-6-0x0000000000400000-0x0000000002B7B000-memory.dmp

memory/2988-2-0x0000000002CC0000-0x0000000002DC0000-memory.dmp

memory/1216-7-0x0000000002D70000-0x0000000002D85000-memory.dmp

memory/2988-8-0x0000000000400000-0x0000000002B7B000-memory.dmp

memory/960-18-0x0000000002D40000-0x0000000002E40000-memory.dmp

memory/960-19-0x0000000000400000-0x0000000002B7B000-memory.dmp