Malware Analysis Report

2024-10-19 08:12

Sample ID 240219-vnh5kagh6y
Target bTDk.exe
SHA256 3f24a0243264894973daaddd665b311850024f99a47f935ca6ecba0d95f5f283
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

3f24a0243264894973daaddd665b311850024f99a47f935ca6ecba0d95f5f283

Threat Level: Known bad

The file bTDk.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

2024-02-19 17:08

Signatures

Njrat family

njrat

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-19 17:08

Reported

2024-02-19 17:10

Platform

win7-20231215-en

Max time kernel

118s

Max time network

124s

Command Line

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

Signatures

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2644 wrote to memory of 2852 N/A C:\Users\Admin\AppData\Local\Temp\bTDk.exe C:\Windows\SysWOW64\cmd.exe
PID 2644 wrote to memory of 2852 N/A C:\Users\Admin\AppData\Local\Temp\bTDk.exe C:\Windows\SysWOW64\cmd.exe
PID 2644 wrote to memory of 2852 N/A C:\Users\Admin\AppData\Local\Temp\bTDk.exe C:\Windows\SysWOW64\cmd.exe
PID 2644 wrote to memory of 2852 N/A C:\Users\Admin\AppData\Local\Temp\bTDk.exe C:\Windows\SysWOW64\cmd.exe

Processes

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

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

C:\Windows\SysWOW64\cmd.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 patria.duckdns.org udp
SE 46.246.80.3:1994 patria.duckdns.org tcp

Files

memory/2644-0-0x0000000074930000-0x0000000074EDB000-memory.dmp

memory/2644-1-0x0000000074930000-0x0000000074EDB000-memory.dmp

memory/2644-2-0x0000000002150000-0x0000000002190000-memory.dmp

memory/2644-3-0x0000000074930000-0x0000000074EDB000-memory.dmp

memory/2644-4-0x0000000002150000-0x0000000002190000-memory.dmp

memory/2644-5-0x0000000074930000-0x0000000074EDB000-memory.dmp

memory/2644-6-0x0000000074930000-0x0000000074EDB000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-19 17:08

Reported

2024-02-19 17:10

Platform

win10v2004-20231215-en

Max time kernel

145s

Max time network

152s

Command Line

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

Signatures

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3304 wrote to memory of 3568 N/A C:\Users\Admin\AppData\Local\Temp\bTDk.exe C:\Windows\SysWOW64\cmd.exe
PID 3304 wrote to memory of 3568 N/A C:\Users\Admin\AppData\Local\Temp\bTDk.exe C:\Windows\SysWOW64\cmd.exe
PID 3304 wrote to memory of 3568 N/A C:\Users\Admin\AppData\Local\Temp\bTDk.exe C:\Windows\SysWOW64\cmd.exe

Processes

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

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

C:\Windows\SysWOW64\cmd.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 173.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 178.223.142.52.in-addr.arpa udp
US 8.8.8.8:53 patria.duckdns.org udp
SE 46.246.80.3:1994 patria.duckdns.org tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 3.80.246.46.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 178.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 206.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 23.173.189.20.in-addr.arpa udp

Files

memory/3304-0-0x00000000754C0000-0x0000000075A71000-memory.dmp

memory/3304-1-0x00000000754C0000-0x0000000075A71000-memory.dmp

memory/3304-2-0x0000000000EF0000-0x0000000000F00000-memory.dmp

memory/3304-3-0x0000000000EF0000-0x0000000000F00000-memory.dmp

memory/3304-4-0x00000000754C0000-0x0000000075A71000-memory.dmp

memory/3304-6-0x00000000754C0000-0x0000000075A71000-memory.dmp