Malware Analysis Report

2024-11-13 18:56

Sample ID 240221-ffvfascc25
Target 1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2
SHA256 1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2
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

1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2

Threat Level: Known bad

The file 1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2 was found to be: Known bad.

Malicious Activity Summary

smokeloader pub3 backdoor trojan

SmokeLoader

Deletes itself

Executes dropped EXE

Unsigned PE

Checks SCSI registry key(s)

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-21 04:49

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-21 04:49

Reported

2024-02-21 04:54

Platform

win7-20231215-en

Max time kernel

300s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.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\eieauga N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\eieauga N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\eieauga N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\eieauga N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.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\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\eieauga 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 2772 wrote to memory of 2612 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\eieauga
PID 2772 wrote to memory of 2612 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\eieauga
PID 2772 wrote to memory of 2612 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\eieauga
PID 2772 wrote to memory of 2612 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\eieauga

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.exe

"C:\Users\Admin\AppData\Local\Temp\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {7A56E133-1CE5-4CD2-B9B3-616A7DE1379D} S-1-5-21-928733405-3780110381-2966456290-1000:VTILVGXH\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\eieauga

C:\Users\Admin\AppData\Roaming\eieauga

Network

Country Destination Domain Proto
US 8.8.8.8:53 sjyey.com udp
KR 123.140.161.243:80 sjyey.com tcp
KR 123.140.161.243:80 sjyey.com tcp
KR 123.140.161.243:80 sjyey.com tcp
KR 123.140.161.243:80 sjyey.com tcp
KR 123.140.161.243:80 sjyey.com tcp
KR 123.140.161.243:80 sjyey.com tcp
KR 123.140.161.243:80 sjyey.com tcp

Files

memory/1856-1-0x0000000000920000-0x0000000000A20000-memory.dmp

memory/1856-2-0x0000000000220000-0x000000000022B000-memory.dmp

memory/1856-3-0x0000000000400000-0x0000000000817000-memory.dmp

memory/1856-5-0x0000000000400000-0x0000000000817000-memory.dmp

memory/1244-4-0x00000000038B0000-0x00000000038C6000-memory.dmp

C:\Users\Admin\AppData\Roaming\eieauga

MD5 f44d0f75c3746989168af456468d553c
SHA1 1bda6154c5dc86f5132fab036a30ae3b55041593
SHA256 1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2
SHA512 524a44375acf65cc1daf98c4ed281ca8b6e8d128b0a76a05dd2a543c78d8357ea6e81baa1ad487a8f36280a4bd2c5c757e68467359e26876ba56328927ab406f

memory/2612-14-0x0000000000900000-0x0000000000A00000-memory.dmp

memory/2612-15-0x0000000000400000-0x0000000000817000-memory.dmp

memory/1244-16-0x00000000039D0000-0x00000000039E6000-memory.dmp

memory/2612-17-0x0000000000400000-0x0000000000817000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-21 04:49

Reported

2024-02-21 04:54

Platform

win10-20240214-en

Max time kernel

300s

Max time network

300s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.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\ducucie 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\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\ducucie N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\ducucie N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\ducucie N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.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\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\ducucie 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\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.exe

"C:\Users\Admin\AppData\Local\Temp\1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2.exe"

C:\Users\Admin\AppData\Roaming\ducucie

C:\Users\Admin\AppData\Roaming\ducucie

Network

Country Destination Domain Proto
US 8.8.8.8:53 sjyey.com udp
KR 211.40.39.251:80 sjyey.com tcp
KR 211.40.39.251:80 sjyey.com tcp
US 8.8.8.8:53 251.39.40.211.in-addr.arpa udp
KR 211.40.39.251:80 sjyey.com tcp
KR 211.40.39.251:80 sjyey.com tcp
KR 211.40.39.251:80 sjyey.com tcp
KR 211.40.39.251:80 sjyey.com tcp
KR 211.40.39.251:80 sjyey.com tcp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 168.117.168.52.in-addr.arpa udp
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp

Files

memory/3592-1-0x0000000000940000-0x0000000000A40000-memory.dmp

memory/3592-2-0x0000000000880000-0x000000000088B000-memory.dmp

memory/3592-3-0x0000000000400000-0x0000000000817000-memory.dmp

memory/3300-4-0x00000000014F0000-0x0000000001506000-memory.dmp

memory/3592-5-0x0000000000400000-0x0000000000817000-memory.dmp

C:\Users\Admin\AppData\Roaming\ducucie

MD5 f44d0f75c3746989168af456468d553c
SHA1 1bda6154c5dc86f5132fab036a30ae3b55041593
SHA256 1a0c9d76d6bd6cf708c1939bb3f4748ccb40b0a4b0c880c6eba432be1a5910f2
SHA512 524a44375acf65cc1daf98c4ed281ca8b6e8d128b0a76a05dd2a543c78d8357ea6e81baa1ad487a8f36280a4bd2c5c757e68467359e26876ba56328927ab406f

memory/4604-14-0x0000000000B60000-0x0000000000C60000-memory.dmp

memory/4604-15-0x0000000000400000-0x0000000000817000-memory.dmp

memory/3300-16-0x0000000002D70000-0x0000000002D86000-memory.dmp

memory/4604-19-0x0000000000400000-0x0000000000817000-memory.dmp