Malware Analysis Report

2024-10-19 08:12

Sample ID 240219-vpnrfahf45
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 17:10

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 17:10

Reported

2024-02-19 17:12

Platform

win7-20231215-en

Max time kernel

117s

Max time network

121s

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
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
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 1424 wrote to memory of 2568 N/A C:\Users\Admin\AppData\Local\Temp\bTDk.exe C:\Windows\SysWOW64\cmd.exe
PID 1424 wrote to memory of 2568 N/A C:\Users\Admin\AppData\Local\Temp\bTDk.exe C:\Windows\SysWOW64\cmd.exe
PID 1424 wrote to memory of 2568 N/A C:\Users\Admin\AppData\Local\Temp\bTDk.exe C:\Windows\SysWOW64\cmd.exe
PID 1424 wrote to memory of 2568 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/1424-0-0x0000000074640000-0x0000000074BEB000-memory.dmp

memory/1424-1-0x0000000074640000-0x0000000074BEB000-memory.dmp

memory/1424-2-0x0000000002100000-0x0000000002140000-memory.dmp

memory/1424-3-0x0000000074640000-0x0000000074BEB000-memory.dmp

memory/1424-4-0x0000000074640000-0x0000000074BEB000-memory.dmp

memory/1424-5-0x0000000002100000-0x0000000002140000-memory.dmp

memory/1424-6-0x0000000002100000-0x0000000002140000-memory.dmp

memory/1424-7-0x0000000074640000-0x0000000074BEB000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-19 17:10

Reported

2024-02-19 17:12

Platform

win10v2004-20231215-en

Max time kernel

143s

Max time network

158s

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
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
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 1728 wrote to memory of 800 N/A C:\Users\Admin\AppData\Local\Temp\bTDk.exe C:\Windows\SysWOW64\cmd.exe
PID 1728 wrote to memory of 800 N/A C:\Users\Admin\AppData\Local\Temp\bTDk.exe C:\Windows\SysWOW64\cmd.exe
PID 1728 wrote to memory of 800 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 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 175.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.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 28.118.140.52.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 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 193.78.101.95.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 5.173.189.20.in-addr.arpa udp

Files

memory/1728-0-0x0000000074640000-0x0000000074BF1000-memory.dmp

memory/1728-2-0x00000000014C0000-0x00000000014D0000-memory.dmp

memory/1728-1-0x0000000074640000-0x0000000074BF1000-memory.dmp

memory/1728-3-0x0000000074640000-0x0000000074BF1000-memory.dmp

memory/1728-4-0x0000000074640000-0x0000000074BF1000-memory.dmp

memory/1728-5-0x00000000014C0000-0x00000000014D0000-memory.dmp

memory/1728-7-0x0000000074640000-0x0000000074BF1000-memory.dmp