Malware Analysis Report

2025-01-22 14:05

Sample ID 240229-xcvekahb6x
Target Server.exe
SHA256 97c92990e38fb05719839a6ff4c375bf20f41b1d0317a424d1cad2920ec6613b
Tags
hacked njrat evasion persistence 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 Overview

score
10/10

SHA256

97c92990e38fb05719839a6ff4c375bf20f41b1d0317a424d1cad2920ec6613b

Threat Level: Known bad

The file Server.exe was found to be: Known bad.

Malicious Activity Summary

hacked njrat evasion persistence trojan

Njrat family

njRAT/Bladabindi

Modifies Windows Firewall

Drops startup file

Adds Run key to start application

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-29 18:42

Signatures

Njrat family

njrat

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-29 18:42

Reported

2024-02-29 18:44

Platform

win10v2004-20240226-en

Max time kernel

36s

Max time network

40s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Server.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\984559f52d4087243e95e5ad9bb48e8d.exe C:\Users\Admin\AppData\Local\Temp\Server.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\984559f52d4087243e95e5ad9bb48e8d.exe C:\Users\Admin\AppData\Local\Temp\Server.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\984559f52d4087243e95e5ad9bb48e8d = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Server.exe\" .." C:\Users\Admin\AppData\Local\Temp\Server.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\984559f52d4087243e95e5ad9bb48e8d = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Server.exe\" .." C:\Users\Admin\AppData\Local\Temp\Server.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Server.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\Server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Server.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\Server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Server.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4928 wrote to memory of 452 N/A C:\Users\Admin\AppData\Local\Temp\Server.exe C:\Windows\SysWOW64\netsh.exe
PID 4928 wrote to memory of 452 N/A C:\Users\Admin\AppData\Local\Temp\Server.exe C:\Windows\SysWOW64\netsh.exe
PID 4928 wrote to memory of 452 N/A C:\Users\Admin\AppData\Local\Temp\Server.exe C:\Windows\SysWOW64\netsh.exe

Processes

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

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

C:\Windows\SysWOW64\netsh.exe

netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Server.exe" "Server.exe" ENABLE

Network

Country Destination Domain Proto
US 8.8.8.8:53 1.181.190.20.in-addr.arpa udp
US 8.8.8.8:53 133.113.22.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 203.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
N/A 127.0.0.1:5552 tcp
N/A 127.0.0.1:5552 tcp
N/A 127.0.0.1:5552 tcp
N/A 127.0.0.1:5552 tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 56.134.221.88.in-addr.arpa udp
N/A 127.0.0.1:5552 tcp

Files

memory/4928-0-0x0000000075410000-0x00000000759C1000-memory.dmp

memory/4928-1-0x0000000075410000-0x00000000759C1000-memory.dmp

memory/4928-2-0x0000000000E00000-0x0000000000E10000-memory.dmp

memory/4928-4-0x0000000075410000-0x00000000759C1000-memory.dmp

memory/4928-5-0x0000000075410000-0x00000000759C1000-memory.dmp

memory/4928-6-0x0000000000E00000-0x0000000000E10000-memory.dmp