Malware Analysis Report

2024-10-23 20:54

Sample ID 240212-zzrcjacb6z
Target bT57.exe
SHA256 ab23de5f1c097be589e6802a230a24c10e07f60f13214e1f011042f4e51061cf
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

ab23de5f1c097be589e6802a230a24c10e07f60f13214e1f011042f4e51061cf

Threat Level: Known bad

The file bT57.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

2024-02-12 21:09

Signatures

Njrat family

njrat

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-12 21:09

Reported

2024-02-12 21:12

Platform

win7-20231129-en

Max time kernel

120s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bT57.exe"

Signatures

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2220 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe C:\Windows\SysWOW64\cmd.exe
PID 2220 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe C:\Windows\SysWOW64\cmd.exe
PID 2220 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe C:\Windows\SysWOW64\cmd.exe
PID 2220 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe C:\Windows\SysWOW64\cmd.exe

Processes

C:\Users\Admin\AppData\Local\Temp\bT57.exe

"C:\Users\Admin\AppData\Local\Temp\bT57.exe"

C:\Windows\SysWOW64\cmd.exe

cmd.exe /C Y /N /D Y /T 1 & Del "C:\Users\Admin\AppData\Local\Temp\bT57.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 patria.duckdns.org udp
SE 46.246.80.9:1995 patria.duckdns.org tcp
SE 46.246.80.9:1995 patria.duckdns.org tcp
SE 46.246.80.9:1995 patria.duckdns.org tcp

Files

memory/2220-0-0x00000000741D0000-0x000000007477B000-memory.dmp

memory/2220-1-0x00000000741D0000-0x000000007477B000-memory.dmp

memory/2220-2-0x0000000002070000-0x00000000020B0000-memory.dmp

memory/2220-3-0x00000000741D0000-0x000000007477B000-memory.dmp

memory/2220-4-0x00000000741D0000-0x000000007477B000-memory.dmp

memory/2220-5-0x0000000002070000-0x00000000020B0000-memory.dmp

memory/2220-6-0x00000000741D0000-0x000000007477B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-12 21:09

Reported

2024-02-12 21:12

Platform

win10v2004-20231215-en

Max time kernel

145s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bT57.exe"

Signatures

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3184 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe C:\Windows\SysWOW64\cmd.exe
PID 3184 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe C:\Windows\SysWOW64\cmd.exe
PID 3184 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\bT57.exe C:\Windows\SysWOW64\cmd.exe

Processes

C:\Users\Admin\AppData\Local\Temp\bT57.exe

"C:\Users\Admin\AppData\Local\Temp\bT57.exe"

C:\Windows\SysWOW64\cmd.exe

cmd.exe /C Y /N /D Y /T 1 & Del "C:\Users\Admin\AppData\Local\Temp\bT57.exe"

Network

Country Destination Domain Proto
US 138.91.171.81:80 tcp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 179.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 patria.duckdns.org udp
SE 46.246.80.9:1995 patria.duckdns.org tcp
US 8.8.8.8:53 9.80.246.46.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 178.223.142.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 28.160.77.104.in-addr.arpa udp
US 8.8.8.8:53 189.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 88.16.208.104.in-addr.arpa udp

Files

memory/3184-0-0x0000000074EA0000-0x0000000075451000-memory.dmp

memory/3184-1-0x0000000000EF0000-0x0000000000F00000-memory.dmp

memory/3184-2-0x0000000074EA0000-0x0000000075451000-memory.dmp

memory/3184-3-0x0000000000EF0000-0x0000000000F00000-memory.dmp

memory/3184-4-0x0000000074EA0000-0x0000000075451000-memory.dmp

memory/3184-6-0x0000000074EA0000-0x0000000075451000-memory.dmp