Malware Analysis Report

2025-04-13 23:42

Sample ID 230821-sjdm6sfc4t
Target bPbV.exe
SHA256 4af08d67c5c9aa9287b61632223f0dfb2784e37469aa2aac2f47b62a59508bc6
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

4af08d67c5c9aa9287b61632223f0dfb2784e37469aa2aac2f47b62a59508bc6

Threat Level: Known bad

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

Malicious Activity Summary

nyan cat njrat

Njrat family

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-08-21 15:08

Signatures

Njrat family

njrat

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-08-21 15:08

Reported

2023-08-21 15:11

Platform

win7-20230712-en

Max time kernel

119s

Max time network

122s

Command Line

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

Signatures

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1712 wrote to memory of 2716 N/A C:\Users\Admin\AppData\Local\Temp\bPbV.exe C:\Windows\SysWOW64\cmd.exe
PID 1712 wrote to memory of 2716 N/A C:\Users\Admin\AppData\Local\Temp\bPbV.exe C:\Windows\SysWOW64\cmd.exe
PID 1712 wrote to memory of 2716 N/A C:\Users\Admin\AppData\Local\Temp\bPbV.exe C:\Windows\SysWOW64\cmd.exe
PID 1712 wrote to memory of 2716 N/A C:\Users\Admin\AppData\Local\Temp\bPbV.exe C:\Windows\SysWOW64\cmd.exe

Processes

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

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

C:\Windows\SysWOW64\cmd.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 tiagoodiaz.duckdns.org udp
SE 46.246.84.11:1994 tiagoodiaz.duckdns.org tcp

Files

memory/1712-54-0x0000000074B50000-0x00000000750FB000-memory.dmp

memory/1712-55-0x0000000074B50000-0x00000000750FB000-memory.dmp

memory/1712-56-0x0000000000A80000-0x0000000000AC0000-memory.dmp

memory/1712-57-0x0000000074B50000-0x00000000750FB000-memory.dmp

memory/1712-58-0x0000000074B50000-0x00000000750FB000-memory.dmp

memory/1712-59-0x0000000000A80000-0x0000000000AC0000-memory.dmp

memory/1712-60-0x0000000074B50000-0x00000000750FB000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-08-21 15:08

Reported

2023-08-21 15:11

Platform

win10v2004-20230703-en

Max time kernel

146s

Max time network

152s

Command Line

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

Signatures

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2004 wrote to memory of 4936 N/A C:\Users\Admin\AppData\Local\Temp\bPbV.exe C:\Windows\SysWOW64\cmd.exe
PID 2004 wrote to memory of 4936 N/A C:\Users\Admin\AppData\Local\Temp\bPbV.exe C:\Windows\SysWOW64\cmd.exe
PID 2004 wrote to memory of 4936 N/A C:\Users\Admin\AppData\Local\Temp\bPbV.exe C:\Windows\SysWOW64\cmd.exe

Processes

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

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

C:\Windows\SysWOW64\cmd.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 1.208.79.178.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 tiagoodiaz.duckdns.org udp
SE 46.246.84.11:1994 tiagoodiaz.duckdns.org tcp
US 8.8.8.8:53 11.84.246.46.in-addr.arpa udp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 8.3.197.209.in-addr.arpa udp
US 8.8.8.8:53 254.20.238.8.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 88.16.208.104.in-addr.arpa udp

Files

memory/2004-133-0x0000000074880000-0x0000000074E31000-memory.dmp

memory/2004-134-0x0000000074880000-0x0000000074E31000-memory.dmp

memory/2004-135-0x0000000001340000-0x0000000001350000-memory.dmp

memory/2004-136-0x0000000074880000-0x0000000074E31000-memory.dmp

memory/2004-137-0x0000000074880000-0x0000000074E31000-memory.dmp

memory/2004-138-0x0000000001340000-0x0000000001350000-memory.dmp

memory/2004-139-0x0000000001340000-0x0000000001350000-memory.dmp

memory/2004-141-0x0000000074880000-0x0000000074E31000-memory.dmp

memory/2004-142-0x0000000001340000-0x0000000001350000-memory.dmp