Malware Analysis Report

2025-04-03 14:58

Sample ID 241110-mcbbksvcln
Target 43ec40ed624835a097a3fa056d290e6f58d32399
SHA256 c34e084c40055a1d2dae3db279fc74b363d4d3d812d62f58aa40f932f5e3aea5
Tags
smokeloader backdoor discovery 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

c34e084c40055a1d2dae3db279fc74b363d4d3d812d62f58aa40f932f5e3aea5

Threat Level: Known bad

The file 43ec40ed624835a097a3fa056d290e6f58d32399 was found to be: Known bad.

Malicious Activity Summary

smokeloader backdoor discovery trojan

SmokeLoader

Smokeloader family

Unsigned PE

Program crash

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

Checks SCSI registry key(s)

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-10 10:18

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-10 10:18

Reported

2024-11-10 10:21

Platform

win7-20240729-en

Max time kernel

63s

Max time network

17s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a5e649c834f91bd5a2a5e776350fa0de963ca30bab4436aa4dbe0d56364aa832.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\a5e649c834f91bd5a2a5e776350fa0de963ca30bab4436aa4dbe0d56364aa832.exe

"C:\Users\Admin\AppData\Local\Temp\a5e649c834f91bd5a2a5e776350fa0de963ca30bab4436aa4dbe0d56364aa832.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 140

Network

N/A

Files

memory/528-1-0x0000000000520000-0x0000000000620000-memory.dmp

memory/528-2-0x0000000000220000-0x0000000000229000-memory.dmp

memory/528-3-0x0000000000400000-0x0000000000409000-memory.dmp

memory/528-5-0x0000000000220000-0x0000000000229000-memory.dmp

memory/528-6-0x0000000000400000-0x0000000000409000-memory.dmp

memory/528-4-0x0000000000400000-0x0000000000490000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-10 10:18

Reported

2024-11-10 10:21

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

138s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a5e649c834f91bd5a2a5e776350fa0de963ca30bab4436aa4dbe0d56364aa832.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Smokeloader family

smokeloader

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\a5e649c834f91bd5a2a5e776350fa0de963ca30bab4436aa4dbe0d56364aa832.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\a5e649c834f91bd5a2a5e776350fa0de963ca30bab4436aa4dbe0d56364aa832.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a5e649c834f91bd5a2a5e776350fa0de963ca30bab4436aa4dbe0d56364aa832.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a5e649c834f91bd5a2a5e776350fa0de963ca30bab4436aa4dbe0d56364aa832.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a5e649c834f91bd5a2a5e776350fa0de963ca30bab4436aa4dbe0d56364aa832.exe

"C:\Users\Admin\AppData\Local\Temp\a5e649c834f91bd5a2a5e776350fa0de963ca30bab4436aa4dbe0d56364aa832.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2504 -ip 2504

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2504 -s 352

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp

Files

memory/2504-2-0x0000000000560000-0x0000000000569000-memory.dmp

memory/2504-1-0x00000000005C0000-0x00000000006C0000-memory.dmp

memory/2504-3-0x0000000000400000-0x0000000000409000-memory.dmp

memory/2504-4-0x0000000000400000-0x0000000000490000-memory.dmp

memory/2504-5-0x0000000000560000-0x0000000000569000-memory.dmp

memory/2504-6-0x0000000000400000-0x0000000000409000-memory.dmp