Malware Analysis Report

2025-06-16 06:49

Sample ID 220930-ywjylsffam
Target bF3n.exe
SHA256 7a6c5815545f2172e0717732eb817b464b324c7a218b85266d5ccfdb62423cda
Tags
nyan cat njrat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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
10/10

SHA256

7a6c5815545f2172e0717732eb817b464b324c7a218b85266d5ccfdb62423cda

Threat Level: Known bad

The file bF3n.exe was found to be: Known bad.

Malicious Activity Summary

nyan cat njrat

Njrat family

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2022-09-30 20:08

Signatures

Njrat family

njrat

Analysis: behavioral1

Detonation Overview

Submitted

2022-09-30 20:08

Reported

2022-09-30 20:10

Platform

win7-20220812-en

Max time kernel

122s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bF3n.exe"

Signatures

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1608 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe C:\Windows\SysWOW64\cmd.exe
PID 1608 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe C:\Windows\SysWOW64\cmd.exe
PID 1608 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe C:\Windows\SysWOW64\cmd.exe
PID 1608 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe C:\Windows\SysWOW64\cmd.exe

Processes

C:\Users\Admin\AppData\Local\Temp\bF3n.exe

"C:\Users\Admin\AppData\Local\Temp\bF3n.exe"

C:\Windows\SysWOW64\cmd.exe

cmd.exe /C Y /N /D Y /T 1 & Del "C:\Users\Admin\AppData\Local\Temp\bF3n.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 adminneiva.duckdns.org udp
US 206.123.129.93:2023 adminneiva.duckdns.org tcp

Files

memory/1608-54-0x0000000075A91000-0x0000000075A93000-memory.dmp

memory/1608-55-0x00000000744E0000-0x0000000074A8B000-memory.dmp

memory/1608-56-0x00000000744E0000-0x0000000074A8B000-memory.dmp

memory/1980-57-0x0000000000000000-mapping.dmp

memory/1608-58-0x00000000744E0000-0x0000000074A8B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-09-30 20:08

Reported

2022-09-30 20:10

Platform

win10v2004-20220901-en

Max time kernel

120s

Max time network

139s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bF3n.exe"

Signatures

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3960 wrote to memory of 2352 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe C:\Windows\SysWOW64\cmd.exe
PID 3960 wrote to memory of 2352 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe C:\Windows\SysWOW64\cmd.exe
PID 3960 wrote to memory of 2352 N/A C:\Users\Admin\AppData\Local\Temp\bF3n.exe C:\Windows\SysWOW64\cmd.exe

Processes

C:\Users\Admin\AppData\Local\Temp\bF3n.exe

"C:\Users\Admin\AppData\Local\Temp\bF3n.exe"

C:\Windows\SysWOW64\cmd.exe

cmd.exe /C Y /N /D Y /T 1 & Del "C:\Users\Admin\AppData\Local\Temp\bF3n.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 adminneiva.duckdns.org udp
US 206.123.129.93:2023 adminneiva.duckdns.org tcp
JP 13.78.111.198:443 tcp
BE 8.238.110.126:80 tcp
NL 88.221.25.155:80 tcp
NL 88.221.25.155:80 tcp
BE 8.238.110.126:80 tcp
US 8.247.211.254:80 tcp
US 204.79.197.203:80 tcp

Files

memory/3960-132-0x00000000754F0000-0x0000000075AA1000-memory.dmp

memory/3960-133-0x00000000754F0000-0x0000000075AA1000-memory.dmp

memory/2352-134-0x0000000000000000-mapping.dmp

memory/3960-135-0x00000000754F0000-0x0000000075AA1000-memory.dmp