Malware Analysis Report

2025-04-13 23:41

Sample ID 230821-xnn2xsfd57
Target 690d9e3707bb18937e5dba980bc33136b6d8220f421c7f38db4229387c552ec3_JC.exe
SHA256 690d9e3707bb18937e5dba980bc33136b6d8220f421c7f38db4229387c552ec3
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

690d9e3707bb18937e5dba980bc33136b6d8220f421c7f38db4229387c552ec3

Threat Level: Known bad

The file 690d9e3707bb18937e5dba980bc33136b6d8220f421c7f38db4229387c552ec3_JC.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 19:00

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 19:00

Reported

2023-08-21 19:02

Platform

win7-20230712-en

Max time kernel

121s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\690d9e3707bb18937e5dba980bc33136b6d8220f421c7f38db4229387c552ec3_JC.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\690d9e3707bb18937e5dba980bc33136b6d8220f421c7f38db4229387c552ec3_JC.exe

"C:\Users\Admin\AppData\Local\Temp\690d9e3707bb18937e5dba980bc33136b6d8220f421c7f38db4229387c552ec3_JC.exe"

C:\Windows\SysWOW64\cmd.exe

cmd.exe /C Y /N /D Y /T 1 & Del "C:\Users\Admin\AppData\Local\Temp\690d9e3707bb18937e5dba980bc33136b6d8220f421c7f38db4229387c552ec3_JC.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/860-54-0x0000000073F10000-0x00000000744BB000-memory.dmp

memory/860-56-0x00000000020A0000-0x00000000020E0000-memory.dmp

memory/860-55-0x0000000073F10000-0x00000000744BB000-memory.dmp

memory/860-57-0x0000000073F10000-0x00000000744BB000-memory.dmp

memory/860-58-0x0000000073F10000-0x00000000744BB000-memory.dmp

memory/860-59-0x00000000020A0000-0x00000000020E0000-memory.dmp

memory/860-60-0x0000000073F10000-0x00000000744BB000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-08-21 19:00

Reported

2023-08-21 19:03

Platform

win10v2004-20230703-en

Max time kernel

143s

Max time network

156s

Command Line

"C:\Users\Admin\AppData\Local\Temp\690d9e3707bb18937e5dba980bc33136b6d8220f421c7f38db4229387c552ec3_JC.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\690d9e3707bb18937e5dba980bc33136b6d8220f421c7f38db4229387c552ec3_JC.exe

"C:\Users\Admin\AppData\Local\Temp\690d9e3707bb18937e5dba980bc33136b6d8220f421c7f38db4229387c552ec3_JC.exe"

C:\Windows\SysWOW64\cmd.exe

cmd.exe /C Y /N /D Y /T 1 & Del "C:\Users\Admin\AppData\Local\Temp\690d9e3707bb18937e5dba980bc33136b6d8220f421c7f38db4229387c552ec3_JC.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 120.208.253.8.in-addr.arpa udp
US 8.8.8.8:53 64.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 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 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 240.81.21.72.in-addr.arpa udp
US 8.8.8.8:53 0.77.109.52.in-addr.arpa udp
US 8.8.8.8:53 12.173.189.20.in-addr.arpa udp

Files

memory/3604-133-0x0000000074F60000-0x0000000075511000-memory.dmp

memory/3604-134-0x0000000074F60000-0x0000000075511000-memory.dmp

memory/3604-135-0x0000000001500000-0x0000000001510000-memory.dmp

memory/3604-136-0x0000000074F60000-0x0000000075511000-memory.dmp

memory/3604-137-0x0000000074F60000-0x0000000075511000-memory.dmp

memory/3604-138-0x0000000001500000-0x0000000001510000-memory.dmp

memory/3604-140-0x0000000074F60000-0x0000000075511000-memory.dmp