Malware Analysis Report

2025-08-05 20:46

Sample ID 240302-2nxraaab2v
Target Nezur_External.zip
SHA256 89c68ff666770a482787e6d27b3c5b5c6efa46fd09c4fa64758f37995b218049
Tags
persistence
score
8/10

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
8/10

SHA256

89c68ff666770a482787e6d27b3c5b5c6efa46fd09c4fa64758f37995b218049

Threat Level: Likely malicious

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

Malicious Activity Summary

persistence

Sets service image path in registry

Unsigned PE

Suspicious behavior: LoadsDriver

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-02 22:44

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-02 22:44

Reported

2024-03-02 22:46

Platform

win7-20240221-en

Max time kernel

119s

Max time network

119s

Command Line

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

Signatures

Sets service image path in registry

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\frAQBc8Wsa1xVPfv\ImagePath = "\\??\\C:\\Users\\Admin\\AppData\\Local\\Temp\\frAQBc8Wsa1xVPfv" C:\Users\Admin\AppData\Local\Temp\Nezur.exe N/A

Suspicious behavior: LoadsDriver

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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Nezur.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Nezur.exe N/A

Suspicious use of FindShellTrayWindow

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2100 wrote to memory of 2096 N/A C:\Users\Admin\AppData\Local\Temp\Nezur.exe C:\Windows\system32\WerFault.exe
PID 2100 wrote to memory of 2096 N/A C:\Users\Admin\AppData\Local\Temp\Nezur.exe C:\Windows\system32\WerFault.exe
PID 2100 wrote to memory of 2096 N/A C:\Users\Admin\AppData\Local\Temp\Nezur.exe C:\Windows\system32\WerFault.exe

Processes

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

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

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe -u -p 2100 -s 344

Network

N/A

Files

memory/2100-1-0x00000000032D0000-0x00000000038B8000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-02 22:44

Reported

2024-03-02 22:47

Platform

win10v2004-20240226-en

Max time kernel

137s

Max time network

144s

Command Line

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

Signatures

Sets service image path in registry

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\frAQBc8Wsa1xVPfv\ImagePath = "\\??\\C:\\Users\\Admin\\AppData\\Local\\Temp\\frAQBc8Wsa1xVPfv" C:\Users\Admin\AppData\Local\Temp\Nezur.exe N/A

Suspicious behavior: LoadsDriver

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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Nezur.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Nezur.exe N/A

Processes

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

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

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4396 --field-trial-handle=2264,i,7010714054498059916,1862725710331979271,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
NL 52.142.223.178:80 tcp
US 8.8.8.8:53 64.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 134.71.91.104.in-addr.arpa udp

Files

N/A