Malware Analysis Report

2025-04-13 23:42

Sample ID 230811-ybcc2agd39
Target xaKdKZI3e9WD.exe
SHA256 e936c50b852c04e153e12893717f7ef6e059dbce99fe615243d1109c5cd1de66
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

e936c50b852c04e153e12893717f7ef6e059dbce99fe615243d1109c5cd1de66

Threat Level: Known bad

The file xaKdKZI3e9WD.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

2023-08-11 19:36

Signatures

Njrat family

njrat

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-08-11 19:36

Reported

2023-08-11 19:38

Platform

win7-20230712-en

Max time kernel

118s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe"

Signatures

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe

"C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe"

C:\Windows\SysWOW64\cmd.exe

cmd.exe /C Y /N /D Y /T 1 & Del "C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 tiagoodiaz.duckdns.org udp
SE 46.246.82.6:1994 tiagoodiaz.duckdns.org tcp

Files

memory/844-54-0x0000000074B50000-0x00000000750FB000-memory.dmp

memory/844-56-0x0000000002000000-0x0000000002040000-memory.dmp

memory/844-55-0x0000000074B50000-0x00000000750FB000-memory.dmp

memory/844-57-0x0000000074B50000-0x00000000750FB000-memory.dmp

memory/844-58-0x0000000074B50000-0x00000000750FB000-memory.dmp

memory/844-59-0x0000000002000000-0x0000000002040000-memory.dmp

memory/844-60-0x0000000074B50000-0x00000000750FB000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-08-11 19:36

Reported

2023-08-11 19:38

Platform

win10v2004-20230703-en

Max time kernel

125s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe"

Signatures

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2072 wrote to memory of 4864 N/A C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe C:\Windows\SysWOW64\cmd.exe
PID 2072 wrote to memory of 4864 N/A C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe C:\Windows\SysWOW64\cmd.exe
PID 2072 wrote to memory of 4864 N/A C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe C:\Windows\SysWOW64\cmd.exe

Processes

C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe

"C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe"

C:\Windows\SysWOW64\cmd.exe

cmd.exe /C Y /N /D Y /T 1 & Del "C:\Users\Admin\AppData\Local\Temp\xaKdKZI3e9WD.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 108.211.229.192.in-addr.arpa udp
US 8.8.8.8:53 tiagoodiaz.duckdns.org udp
SE 46.246.82.6:1994 tiagoodiaz.duckdns.org tcp
US 8.8.8.8:53 6.82.246.46.in-addr.arpa udp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 63.13.109.52.in-addr.arpa udp
US 8.8.8.8:53 10.173.189.20.in-addr.arpa udp

Files

memory/2072-133-0x0000000075160000-0x0000000075711000-memory.dmp

memory/2072-134-0x0000000075160000-0x0000000075711000-memory.dmp

memory/2072-135-0x0000000000980000-0x0000000000990000-memory.dmp

memory/2072-136-0x0000000075160000-0x0000000075711000-memory.dmp

memory/2072-137-0x0000000000980000-0x0000000000990000-memory.dmp

memory/2072-138-0x0000000000980000-0x0000000000990000-memory.dmp

memory/2072-140-0x0000000075160000-0x0000000075711000-memory.dmp