Malware Analysis Report

2025-01-22 14:05

Sample ID 240228-2bw9zsfd43
Target Neironka.exe
SHA256 8256bf36ae9eebbea391992a4a86ada3a8f28804b66836c0e71efc70d8ba1d40
Tags
njrat hacked 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

8256bf36ae9eebbea391992a4a86ada3a8f28804b66836c0e71efc70d8ba1d40

Threat Level: Known bad

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

Malicious Activity Summary

njrat hacked persistence trojan

njRAT/Bladabindi

Drops startup file

Executes dropped EXE

Adds Run key to start application

Drops file in Windows directory

Enumerates physical storage devices

Unsigned PE

Kills process with taskkill

Opens file in notepad (likely ransom note)

Uses Task Scheduler COM API

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-28 22:25

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-28 22:25

Reported

2024-02-28 22:26

Platform

win11-20240221-en

Max time kernel

62s

Max time network

64s

Command Line

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

Signatures

njRAT/Bladabindi

trojan njrat

Drops startup file

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\notpad.exe N/A
N/A N/A C:\Windows\notpad.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1637591879-962683004-3585269084-1000\Software\Microsoft\Windows\CurrentVersion\Run\notpad.exe = "\"C:\\Windows\\notpad.exe\" .." C:\Windows\notpad.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\notpad.exe = "\"C:\\Windows\\notpad.exe\" .." C:\Windows\notpad.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\notpad.exe C:\Users\Admin\AppData\Local\Temp\Neironka.exe N/A
File opened for modification C:\Windows\notpad.exe C:\Windows\notpad.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A

Kills process with taskkill

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\taskkill.exe N/A
N/A N/A C:\Windows\SYSTEM32\taskkill.exe N/A
N/A N/A C:\Windows\SYSTEM32\taskkill.exe N/A

Opens file in notepad (likely ransom note)

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\System32\Notepad.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\notpad.exe N/A
Token: 33 N/A C:\Windows\notpad.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\notpad.exe N/A
Token: 33 N/A C:\Windows\notpad.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\notpad.exe N/A
Token: 33 N/A C:\Windows\notpad.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\notpad.exe N/A
Token: 33 N/A C:\Windows\notpad.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\notpad.exe N/A
Token: 33 N/A C:\Windows\notpad.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\notpad.exe N/A
Token: 33 N/A C:\Windows\notpad.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\notpad.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3196 wrote to memory of 328 N/A C:\Users\Admin\AppData\Local\Temp\Neironka.exe C:\Windows\notpad.exe
PID 3196 wrote to memory of 328 N/A C:\Users\Admin\AppData\Local\Temp\Neironka.exe C:\Windows\notpad.exe
PID 3196 wrote to memory of 248 N/A C:\Users\Admin\AppData\Local\Temp\Neironka.exe C:\Windows\System32\cmd.exe
PID 3196 wrote to memory of 248 N/A C:\Users\Admin\AppData\Local\Temp\Neironka.exe C:\Windows\System32\cmd.exe
PID 248 wrote to memory of 896 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\choice.exe
PID 248 wrote to memory of 896 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\choice.exe
PID 328 wrote to memory of 2156 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\taskkill.exe
PID 328 wrote to memory of 2156 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\taskkill.exe
PID 328 wrote to memory of 4472 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\schtasks.exe
PID 328 wrote to memory of 4472 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\schtasks.exe
PID 328 wrote to memory of 4432 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\schtasks.exe
PID 328 wrote to memory of 4432 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\schtasks.exe
PID 328 wrote to memory of 740 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\taskkill.exe
PID 328 wrote to memory of 740 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\taskkill.exe
PID 328 wrote to memory of 3128 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\schtasks.exe
PID 328 wrote to memory of 3128 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\schtasks.exe
PID 328 wrote to memory of 2484 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\schtasks.exe
PID 328 wrote to memory of 2484 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\schtasks.exe
PID 328 wrote to memory of 3744 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\taskkill.exe
PID 328 wrote to memory of 3744 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\taskkill.exe
PID 328 wrote to memory of 4792 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\schtasks.exe
PID 328 wrote to memory of 4792 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\schtasks.exe
PID 328 wrote to memory of 4836 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\schtasks.exe
PID 328 wrote to memory of 4836 N/A C:\Windows\notpad.exe C:\Windows\SYSTEM32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\notpad.exe

"C:\Windows\notpad.exe"

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C choice /C Y /N /D Y /T 5 & Del "C:\Users\Admin\AppData\Local\Temp\Neironka.exe"

C:\Windows\system32\choice.exe

choice /C Y /N /D Y /T 5

C:\Windows\SYSTEM32\taskkill.exe

taskkill /f im Wireshark.exe

C:\Windows\SYSTEM32\schtasks.exe

schtasks /delete /tn "MicrosoftEdgeUpdateTaskMachine" /f

C:\Windows\SYSTEM32\schtasks.exe

schtasks /create /sc minute /mo 1 /tn "MicrosoftEdgeUpdateTaskMachine" /tr C:\Windows\notpad.exe

C:\Windows\System32\Notepad.exe

"C:\Windows\System32\Notepad.exe" C:\Users\Admin\Desktop\RegisterUnlock.vbe

C:\Windows\SYSTEM32\taskkill.exe

taskkill /f im Wireshark.exe

C:\Windows\SYSTEM32\schtasks.exe

schtasks /delete /tn "MicrosoftEdgeUpdateTaskMachine" /f

C:\Windows\SYSTEM32\schtasks.exe

schtasks /create /sc minute /mo 1 /tn "MicrosoftEdgeUpdateTaskMachine" /tr C:\Windows\notpad.exe

C:\Windows\System32\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\Users\Admin\Desktop\RegisterUnlock.vbe"

C:\Windows\notpad.exe

C:\Windows\notpad.exe

C:\Windows\SYSTEM32\taskkill.exe

taskkill /f im Wireshark.exe

C:\Windows\SYSTEM32\schtasks.exe

schtasks /delete /tn "MicrosoftEdgeUpdateTaskMachine" /f

C:\Windows\SYSTEM32\schtasks.exe

schtasks /create /sc minute /mo 1 /tn "MicrosoftEdgeUpdateTaskMachine" /tr C:\Windows\notpad.exe

Network

Country Destination Domain Proto
N/A 192.168.2.133:6522 tcp
N/A 192.168.2.133:6522 tcp
GB 2.18.66.48:443 tcp
US 8.8.8.8:53 browser.pipe.aria.microsoft.com udp
US 20.189.173.18:443 browser.pipe.aria.microsoft.com tcp
GB 92.123.128.134:443 r.bing.com tcp
GB 92.123.128.134:443 r.bing.com tcp
GB 92.123.128.134:443 r.bing.com tcp
GB 92.123.128.134:443 r.bing.com tcp
GB 92.123.128.134:443 r.bing.com tcp
GB 92.123.128.134:443 r.bing.com tcp
US 8.8.8.8:53 18.173.189.20.in-addr.arpa udp
N/A 192.168.2.133:6522 tcp

Files

memory/3196-1-0x000000001BD00000-0x000000001C1CE000-memory.dmp

memory/3196-0-0x00007FF934A20000-0x00007FF9353C1000-memory.dmp

memory/3196-3-0x000000001B750000-0x000000001B766000-memory.dmp

memory/3196-2-0x00000000010F0000-0x0000000001100000-memory.dmp

memory/3196-4-0x000000001C1D0000-0x000000001C276000-memory.dmp

memory/3196-5-0x00007FF934A20000-0x00007FF9353C1000-memory.dmp

C:\Windows\notpad.exe

MD5 a91d2aaab4f36c0b1560082585b3bfbd
SHA1 813a9a950fc8a323569261007ad9264c78e2689b
SHA256 8256bf36ae9eebbea391992a4a86ada3a8f28804b66836c0e71efc70d8ba1d40
SHA512 4b1306ed2982c49680d09a91867b6b1e4b0cc296ec4b0ac87a7a5ff8dc24738f4f67ed38b0284419c45109109209888a951ec2832da9bfc43299092cbf2b95fb

memory/328-14-0x00007FF934A20000-0x00007FF9353C1000-memory.dmp

memory/328-18-0x00007FF934A20000-0x00007FF9353C1000-memory.dmp

memory/3196-17-0x00007FF934A20000-0x00007FF9353C1000-memory.dmp

memory/328-16-0x00000000016D0000-0x00000000016E0000-memory.dmp

memory/328-22-0x000000001C880000-0x000000001C91C000-memory.dmp

memory/328-23-0x0000000001530000-0x0000000001538000-memory.dmp

memory/328-24-0x00000000016D0000-0x00000000016E0000-memory.dmp

memory/328-25-0x00000000016D0000-0x00000000016E0000-memory.dmp

memory/328-26-0x00007FF934A20000-0x00007FF9353C1000-memory.dmp

memory/3508-28-0x00007FF934A20000-0x00007FF9353C1000-memory.dmp

memory/3508-29-0x00007FF934A20000-0x00007FF9353C1000-memory.dmp

memory/3508-30-0x0000000000DA0000-0x0000000000DB0000-memory.dmp

memory/3508-32-0x00007FF934A20000-0x00007FF9353C1000-memory.dmp