Malware Analysis Report

2024-11-13 18:56

Sample ID 240222-fex5sscd39
Target 1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642
SHA256 1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642
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

1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642

Threat Level: Known bad

The file 1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642 was found to be: Known bad.

Malicious Activity Summary

smokeloader pub3 backdoor trojan

SmokeLoader

Deletes itself

Executes dropped EXE

Unsigned PE

Uses Task Scheduler COM API

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

Checks SCSI registry key(s)

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of SendNotifyMessage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-22 04:47

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-22 04:47

Reported

2024-02-22 04:52

Platform

win7-20240220-en

Max time kernel

300s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.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\cdjswab 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\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\cdjswab N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\cdjswab N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\cdjswab N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\cdjswab N/A

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
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Suspicious use of SendNotifyMessage

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

Description Indicator Process Target
PID 348 wrote to memory of 2792 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\cdjswab
PID 348 wrote to memory of 2792 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\cdjswab
PID 348 wrote to memory of 2792 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\cdjswab
PID 348 wrote to memory of 2792 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\cdjswab

Processes

C:\Users\Admin\AppData\Local\Temp\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.exe

"C:\Users\Admin\AppData\Local\Temp\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {B1F5BD5C-BD82-49D5-A8B3-9FA3A63BBB4C} S-1-5-21-2721934792-624042501-2768869379-1000:BISMIZHX\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\cdjswab

C:\Users\Admin\AppData\Roaming\cdjswab

Network

Country Destination Domain Proto
US 8.8.8.8:53 sjyey.com udp
PA 190.219.136.87:80 sjyey.com tcp
PA 190.219.136.87:80 sjyey.com tcp
PA 190.219.136.87:80 sjyey.com tcp
PA 190.219.136.87:80 sjyey.com tcp
PA 190.219.136.87:80 sjyey.com tcp
PA 190.219.136.87:80 sjyey.com tcp

Files

memory/2292-1-0x0000000002EF0000-0x0000000002FF0000-memory.dmp

memory/2292-2-0x0000000000220000-0x000000000022B000-memory.dmp

memory/2292-3-0x0000000000400000-0x0000000002D35000-memory.dmp

memory/1208-4-0x0000000002D40000-0x0000000002D56000-memory.dmp

memory/2292-5-0x0000000000400000-0x0000000002D35000-memory.dmp

C:\Users\Admin\AppData\Roaming\cdjswab

MD5 24e4c36f839b0e30e8bdad2571403918
SHA1 bb1132c794c8cd67aff3cd78ea0c00296cb0bdcf
SHA256 1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642
SHA512 2cd0abfcfb774856a6b7dbe094e18fee19ca4a814448ddec9388442471bac75299de89fe46ad17950e970403babafb3cbd43e62e003a513621842be87f19db40

memory/2792-14-0x00000000002D0000-0x00000000003D0000-memory.dmp

memory/2792-15-0x0000000000400000-0x0000000002D35000-memory.dmp

memory/1208-16-0x0000000002EF0000-0x0000000002F06000-memory.dmp

memory/2792-17-0x0000000000400000-0x0000000002D35000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-22 04:47

Reported

2024-02-22 04:52

Platform

win10-20240214-en

Max time kernel

300s

Max time network

280s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.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\fvtwdij N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\fvtwdij N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\fvtwdij N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\fvtwdij N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\fvtwdij 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\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.exe

"C:\Users\Admin\AppData\Local\Temp\1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642.exe"

C:\Users\Admin\AppData\Roaming\fvtwdij

C:\Users\Admin\AppData\Roaming\fvtwdij

Network

Country Destination Domain Proto
US 20.231.121.79:80 tcp
US 8.8.8.8:53 sjyey.com udp
AR 190.195.60.212:80 sjyey.com tcp
AR 190.195.60.212:80 sjyey.com tcp
US 8.8.8.8:53 212.60.195.190.in-addr.arpa udp
AR 190.195.60.212:80 sjyey.com tcp
AR 190.195.60.212:80 sjyey.com tcp
AR 190.195.60.212:80 sjyey.com tcp
AR 190.195.60.212:80 sjyey.com tcp
NL 52.111.243.30:443 tcp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 91.65.42.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp

Files

memory/1136-1-0x0000000002F40000-0x0000000003040000-memory.dmp

memory/1136-2-0x0000000002E70000-0x0000000002E7B000-memory.dmp

memory/1136-3-0x0000000000400000-0x0000000002D35000-memory.dmp

memory/3296-4-0x0000000001040000-0x0000000001056000-memory.dmp

memory/1136-5-0x0000000000400000-0x0000000002D35000-memory.dmp

C:\Users\Admin\AppData\Roaming\fvtwdij

MD5 24e4c36f839b0e30e8bdad2571403918
SHA1 bb1132c794c8cd67aff3cd78ea0c00296cb0bdcf
SHA256 1cce3920d92add36243abaa69056c5fbbdb5ed05af6c379ae1a6f1b28c2e8642
SHA512 2cd0abfcfb774856a6b7dbe094e18fee19ca4a814448ddec9388442471bac75299de89fe46ad17950e970403babafb3cbd43e62e003a513621842be87f19db40

memory/2068-14-0x0000000002D60000-0x0000000002E60000-memory.dmp

memory/2068-15-0x0000000000400000-0x0000000002D35000-memory.dmp

memory/3296-16-0x0000000002950000-0x0000000002966000-memory.dmp

memory/2068-19-0x0000000000400000-0x0000000002D35000-memory.dmp