Malware Analysis Report

2024-09-09 20:14

Sample ID 240613-2expxswhkn
Target SmartDefragmenter.zip
SHA256 ddf1b79f563d94bb3ddb46b37aa010d95403dc7a1debfc9476a8ab449472b738
Tags
evasion persistence
score
8/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
8/10

SHA256

ddf1b79f563d94bb3ddb46b37aa010d95403dc7a1debfc9476a8ab449472b738

Threat Level: Likely malicious

The file SmartDefragmenter.zip was found to be: Likely malicious.

Malicious Activity Summary

evasion persistence

Disables Task Manager via registry modification

Executes dropped EXE

Checks computer location settings

Adds Run key to start application

Unsigned PE

Enumerates physical storage devices

Suspicious behavior: RenamesItself

System policy modification

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-13 22:30

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-13 22:30

Reported

2024-06-13 22:31

Platform

win10v2004-20240508-en

Max time kernel

26s

Max time network

35s

Command Line

C:\Windows\Explorer.EXE

Signatures

Disables Task Manager via registry modification

evasion

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\[email protected] N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\winsp2up.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winsp2up.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\winsp2up.exe" C:\Users\Admin\AppData\Local\Temp\[email protected] N/A

Enumerates physical storage devices

Suspicious behavior: RenamesItself

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\[email protected] N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\[email protected] N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\winsp2up.exe N/A

System policy modification

evasion
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System C:\Users\Admin\AppData\Local\Temp\[email protected] N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableTaskMgr = "1" C:\Users\Admin\AppData\Local\Temp\[email protected] N/A

Processes

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

C:\Users\Admin\AppData\Local\Temp\[email protected]

"C:\Users\Admin\AppData\Local\Temp\[email protected]"

C:\Users\Admin\AppData\Local\Temp\winsp2up.exe

"C:\Users\Admin\AppData\Local\Temp\winsp2up.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp

Files

memory/2984-0-0x0000000000B20000-0x0000000000B87000-memory.dmp

memory/2984-1-0x0000000000400000-0x0000000000470000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\winsp2up.exe

MD5 03baeba6b4224371cca7fa6f95ae61c0
SHA1 8731202d2f954421a37b5c9e01d971131bd515f1
SHA256 61a9e3278b6bcc29a2a0405b06fb2a3bbcb1751c3dd564a8f94cc89ea957ec35
SHA512 386643b0a52b6b1a53e81a8500d040b6415e532ebaffd1be8d1afd4ccb10f6c0342cf734b688ec803b960339284c8d9669e638b1648d9cc734cf7367659c7fd0

memory/2984-13-0x0000000000400000-0x000000000054F000-memory.dmp

memory/2984-14-0x0000000000400000-0x0000000000470000-memory.dmp

memory/3048-15-0x0000000000400000-0x000000000054F000-memory.dmp

memory/3048-16-0x0000000000400000-0x000000000054F000-memory.dmp

memory/3048-18-0x0000000000400000-0x000000000054F000-memory.dmp