Malware Analysis Report

2024-10-19 08:10

Sample ID 240622-z3ah7avbjb
Target Server33.exe
SHA256 94baaf372f566bc6ffa2c24a952b3f4dda94f29c031b95cfcfba96862206b5a7
Tags
dlvil njrat evasion persistence privilege_escalation
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

94baaf372f566bc6ffa2c24a952b3f4dda94f29c031b95cfcfba96862206b5a7

Threat Level: Known bad

The file Server33.exe was found to be: Known bad.

Malicious Activity Summary

dlvil njrat evasion persistence privilege_escalation

Njrat family

Modifies Windows Firewall

Executes dropped EXE

Drops startup file

Checks computer location settings

Drops file in System32 directory

Drops autorun.inf file

Drops file in Windows directory

Drops file in Program Files directory

Unsigned PE

Enumerates physical storage devices

Event Triggered Execution: Netsh Helper DLL

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: GetForegroundWindowSpam

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-22 21:14

Signatures

Njrat family

njrat

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-22 21:14

Reported

2024-06-22 21:17

Platform

win10v2004-20240611-en

Max time kernel

210s

Max time network

208s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Server33.exe"

Signatures

Modifies Windows Firewall

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\netsh.exe N/A
N/A N/A C:\Windows\SysWOW64\netsh.exe N/A
N/A N/A C:\Windows\SysWOW64\netsh.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3169499791-3545231813-3156325206-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\Server33.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Corporation.exe C:\Windows\server.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Corporation.exe C:\Windows\server.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\a4955fd3d259f774f053031a46dc14a9Windows Update.exe C:\Windows\server.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\a4955fd3d259f774f053031a46dc14a9Windows Update.exe C:\Windows\server.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Explower.exe C:\Windows\server.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Explower.exe C:\Windows\server.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\server.exe N/A

Drops autorun.inf file

Description Indicator Process Target
File created F:\autorun.inf C:\Windows\server.exe N/A
File opened for modification F:\autorun.inf C:\Windows\server.exe N/A
File created C:\autorun.inf C:\Windows\server.exe N/A
File opened for modification C:\autorun.inf C:\Windows\server.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\Explower.exe C:\Windows\server.exe N/A
File opened for modification C:\Windows\SysWOW64\Explower.exe C:\Windows\server.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\Explower.exe C:\Windows\server.exe N/A
File opened for modification C:\Program Files (x86)\Explower.exe C:\Windows\server.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\server.exe C:\Users\Admin\AppData\Local\Temp\Server33.exe N/A
File opened for modification C:\Windows\server.exe C:\Windows\server.exe N/A

Enumerates physical storage devices

Event Triggered Execution: Netsh Helper DLL

persistence privilege_escalation
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key opened \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key queried \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key value enumerated \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key queried \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key value enumerated \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key queried \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key value enumerated \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key opened \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A
N/A N/A C:\Windows\server.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Windows\server.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A
Token: 33 N/A C:\Windows\server.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\server.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 704 wrote to memory of 3484 N/A C:\Users\Admin\AppData\Local\Temp\Server33.exe C:\Windows\server.exe
PID 704 wrote to memory of 3484 N/A C:\Users\Admin\AppData\Local\Temp\Server33.exe C:\Windows\server.exe
PID 704 wrote to memory of 3484 N/A C:\Users\Admin\AppData\Local\Temp\Server33.exe C:\Windows\server.exe
PID 3484 wrote to memory of 4180 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe
PID 3484 wrote to memory of 4180 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe
PID 3484 wrote to memory of 4180 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe
PID 3484 wrote to memory of 964 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe
PID 3484 wrote to memory of 964 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe
PID 3484 wrote to memory of 964 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe
PID 3484 wrote to memory of 3488 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe
PID 3484 wrote to memory of 3488 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe
PID 3484 wrote to memory of 3488 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe

Processes

C:\Users\Admin\AppData\Local\Temp\Server33.exe

"C:\Users\Admin\AppData\Local\Temp\Server33.exe"

C:\Windows\server.exe

"C:\Windows\server.exe"

C:\Windows\SysWOW64\netsh.exe

netsh firewall add allowedprogram "C:\Windows\server.exe" "server.exe" ENABLE

C:\Windows\SysWOW64\netsh.exe

netsh firewall delete allowedprogram "C:\Windows\server.exe"

C:\Windows\SysWOW64\netsh.exe

netsh firewall add allowedprogram "C:\Windows\server.exe" "server.exe" ENABLE

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
NL 23.62.61.129:443 www.bing.com tcp
US 8.8.8.8:53 45.19.74.20.in-addr.arpa udp
US 8.8.8.8:53 129.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 remember-sail.gl.at.ply.gg udp
US 147.185.221.20:446 remember-sail.gl.at.ply.gg tcp
US 147.185.221.20:446 remember-sail.gl.at.ply.gg tcp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 147.185.221.20:446 remember-sail.gl.at.ply.gg tcp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 147.185.221.20:446 remember-sail.gl.at.ply.gg tcp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 147.185.221.20:446 remember-sail.gl.at.ply.gg tcp
US 8.8.8.8:53 58.99.105.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp
US 147.185.221.20:446 remember-sail.gl.at.ply.gg tcp
US 147.185.221.20:446 remember-sail.gl.at.ply.gg tcp
US 147.185.221.20:446 remember-sail.gl.at.ply.gg tcp
US 147.185.221.20:446 remember-sail.gl.at.ply.gg tcp

Files

memory/704-0-0x0000000074852000-0x0000000074853000-memory.dmp

memory/704-1-0x0000000074850000-0x0000000074E01000-memory.dmp

memory/704-2-0x0000000074850000-0x0000000074E01000-memory.dmp

C:\Windows\server.exe

MD5 5836adbf5699fe6dc7e27d695881f99f
SHA1 7283570b5b5485ea614926acab4a9138d55edd5d
SHA256 94baaf372f566bc6ffa2c24a952b3f4dda94f29c031b95cfcfba96862206b5a7
SHA512 5431a6328f6eed65d252f2bf91b441400777ad976d57127c08c36f63b2350eb23803f819191099e29a8adeee53de219b6a11f5c7eecffbb9c22944540beee189

memory/704-14-0x0000000074850000-0x0000000074E01000-memory.dmp

memory/3484-13-0x0000000074850000-0x0000000074E01000-memory.dmp

memory/3484-15-0x0000000074850000-0x0000000074E01000-memory.dmp

C:\Users\Admin\AppData\Roaming\app

MD5 d43c5b07c128b116b7bc8faf7b8efa9d
SHA1 dd3540ad4ae14b21b665d108cf4570c2dfa6a6fa
SHA256 80ad1cc7b3a784dad618a445af0c8cf3efa903f82a814756f2aaa7b57f45791f
SHA512 618b01e2b808e1954d011635dfdf63bc75855145208fc5cae33ce09c7e5b43cf978f6511beb311765e6920e728a290c9f9ced7563e40e8ff8d093d50fdc18334

memory/3484-53-0x0000000074850000-0x0000000074E01000-memory.dmp

memory/3484-54-0x0000000074850000-0x0000000074E01000-memory.dmp