Malware Analysis Report

2025-03-15 06:24

Sample ID 240928-l3dnyszdjj
Target 4c42f6a7027df50fff5e175148e29c9fdcde33a77cde36eee1dd8aa121f1fec3.exe
SHA256 4c42f6a7027df50fff5e175148e29c9fdcde33a77cde36eee1dd8aa121f1fec3
Tags
discovery evasion persistence privilege_escalation hacked njrat trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

4c42f6a7027df50fff5e175148e29c9fdcde33a77cde36eee1dd8aa121f1fec3

Threat Level: Known bad

The file 4c42f6a7027df50fff5e175148e29c9fdcde33a77cde36eee1dd8aa121f1fec3.exe was found to be: Known bad.

Malicious Activity Summary

discovery evasion persistence privilege_escalation hacked njrat trojan

njRAT/Bladabindi

Njrat family

Modifies Windows Firewall

Drops startup file

Executes dropped EXE

Checks computer location settings

Loads dropped DLL

Adds Run key to start application

Unsigned PE

Enumerates physical storage devices

Event Triggered Execution: Netsh Helper DLL

System Location Discovery: System Language Discovery

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-28 10:03

Signatures

Njrat family

njrat

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-28 10:03

Reported

2024-09-28 10:05

Platform

win10v2004-20240802-en

Max time kernel

149s

Max time network

145s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4c42f6a7027df50fff5e175148e29c9fdcde33a77cde36eee1dd8aa121f1fec3.exe"

Signatures

Modifies Windows Firewall

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\netsh.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\4c42f6a7027df50fff5e175148e29c9fdcde33a77cde36eee1dd8aa121f1fec3.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e43cca706d59e01c80fe2fae1742de3f.exe C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e43cca706d59e01c80fe2fae1742de3f.exe C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\e43cca706d59e01c80fe2fae1742de3f = "\"C:\\Users\\Admin\\AppData\\Roaming\\igfxCUIService.exe\" .." C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\e43cca706d59e01c80fe2fae1742de3f = "\"C:\\Users\\Admin\\AppData\\Roaming\\igfxCUIService.exe\" .." C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A

Enumerates physical storage devices

Event Triggered Execution: Netsh Helper DLL

persistence privilege_escalation
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key queried \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key value enumerated \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A

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\4c42f6a7027df50fff5e175148e29c9fdcde33a77cde36eee1dd8aa121f1fec3.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\netsh.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4c42f6a7027df50fff5e175148e29c9fdcde33a77cde36eee1dd8aa121f1fec3.exe

"C:\Users\Admin\AppData\Local\Temp\4c42f6a7027df50fff5e175148e29c9fdcde33a77cde36eee1dd8aa121f1fec3.exe"

C:\Users\Admin\AppData\Roaming\igfxCUIService.exe

"C:\Users\Admin\AppData\Roaming\igfxCUIService.exe"

C:\Windows\SysWOW64\netsh.exe

netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\igfxCUIService.exe" "igfxCUIService.exe" ENABLE

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 yano.ddns.net udp
US 8.8.8.8:53 yano.ddns.net udp

Files

memory/844-0-0x0000000074F02000-0x0000000074F03000-memory.dmp

memory/844-1-0x0000000074F00000-0x00000000754B1000-memory.dmp

memory/844-2-0x0000000074F00000-0x00000000754B1000-memory.dmp

C:\Users\Admin\AppData\Roaming\igfxCUIService.exe

MD5 4a1a0fa8fed53f3be3b26d4e2f38444b
SHA1 f23d93559345eed220ad8292d43e48d35c203d52
SHA256 4c42f6a7027df50fff5e175148e29c9fdcde33a77cde36eee1dd8aa121f1fec3
SHA512 e7b7ef9a30424fa3545174e44aeea33e01c583400bb2a6a0eafe38adb9c33e1506ca5d5d2ea22b72796f858545a7702bd5f4f093f13654473ff14457b616d257

memory/3760-13-0x0000000074F00000-0x00000000754B1000-memory.dmp

memory/844-12-0x0000000074F00000-0x00000000754B1000-memory.dmp

memory/3760-14-0x0000000074F00000-0x00000000754B1000-memory.dmp

memory/3760-16-0x0000000074F00000-0x00000000754B1000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-28 10:03

Reported

2024-09-28 10:05

Platform

win7-20240704-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4c42f6a7027df50fff5e175148e29c9fdcde33a77cde36eee1dd8aa121f1fec3.exe"

Signatures

njRAT/Bladabindi

trojan njrat

Modifies Windows Firewall

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\netsh.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e43cca706d59e01c80fe2fae1742de3f.exe C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e43cca706d59e01c80fe2fae1742de3f.exe C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\e43cca706d59e01c80fe2fae1742de3f = "\"C:\\Users\\Admin\\AppData\\Roaming\\igfxCUIService.exe\" .." C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\e43cca706d59e01c80fe2fae1742de3f = "\"C:\\Users\\Admin\\AppData\\Roaming\\igfxCUIService.exe\" .." C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A

Enumerates physical storage devices

Event Triggered Execution: Netsh Helper DLL

persistence privilege_escalation
Description Indicator Process Target
Key queried \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key value enumerated \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key opened \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A

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\4c42f6a7027df50fff5e175148e29c9fdcde33a77cde36eee1dd8aa121f1fec3.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\netsh.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Roaming\igfxCUIService.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4c42f6a7027df50fff5e175148e29c9fdcde33a77cde36eee1dd8aa121f1fec3.exe

"C:\Users\Admin\AppData\Local\Temp\4c42f6a7027df50fff5e175148e29c9fdcde33a77cde36eee1dd8aa121f1fec3.exe"

C:\Users\Admin\AppData\Roaming\igfxCUIService.exe

"C:\Users\Admin\AppData\Roaming\igfxCUIService.exe"

C:\Windows\SysWOW64\netsh.exe

netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\igfxCUIService.exe" "igfxCUIService.exe" ENABLE

Network

Country Destination Domain Proto
US 8.8.8.8:53 yano.ddns.net udp

Files

memory/2960-2-0x0000000074420000-0x00000000749CB000-memory.dmp

memory/2960-1-0x0000000074420000-0x00000000749CB000-memory.dmp

memory/2960-0-0x0000000074421000-0x0000000074422000-memory.dmp

\Users\Admin\AppData\Roaming\igfxCUIService.exe

MD5 4a1a0fa8fed53f3be3b26d4e2f38444b
SHA1 f23d93559345eed220ad8292d43e48d35c203d52
SHA256 4c42f6a7027df50fff5e175148e29c9fdcde33a77cde36eee1dd8aa121f1fec3
SHA512 e7b7ef9a30424fa3545174e44aeea33e01c583400bb2a6a0eafe38adb9c33e1506ca5d5d2ea22b72796f858545a7702bd5f4f093f13654473ff14457b616d257

memory/2432-11-0x0000000074420000-0x00000000749CB000-memory.dmp

memory/2432-12-0x0000000074420000-0x00000000749CB000-memory.dmp

memory/2960-10-0x0000000074420000-0x00000000749CB000-memory.dmp

memory/2432-14-0x0000000074420000-0x00000000749CB000-memory.dmp