Malware Analysis Report

2024-10-19 08:10

Sample ID 240622-vbbvqazalj
Target SolararB5.1.exe
SHA256 199199951d5ec31ad1f699ee996d96524e5022a8af45797777d16488224424d5
Tags
debil 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

199199951d5ec31ad1f699ee996d96524e5022a8af45797777d16488224424d5

Threat Level: Known bad

The file SolararB5.1.exe was found to be: Known bad.

Malicious Activity Summary

debil njrat evasion persistence privilege_escalation

Njrat family

Modifies Windows Firewall

Checks computer location settings

Executes dropped EXE

Drops startup file

Drops autorun.inf file

Drops file in System32 directory

Drops file in Windows directory

Drops file in Program Files directory

Enumerates physical storage devices

Event Triggered Execution: Netsh Helper DLL

Unsigned PE

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 16:48

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 16:48

Reported

2024-06-22 16:51

Platform

win10v2004-20240611-en

Max time kernel

150s

Max time network

139s

Command Line

"C:\Users\Admin\AppData\Local\Temp\SolararB5.1.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-1-5-21-3665033694-1447845302-680750983-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\SolararB5.1.exe N/A

Drops startup file

Description Indicator Process Target
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\2c030f9e6d6e7a75ab6016f5c301de1aWindows 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
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\2c030f9e6d6e7a75ab6016f5c301de1aWindows Update.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 C:\autorun.inf C:\Windows\server.exe N/A
File opened for modification C:\autorun.inf C:\Windows\server.exe N/A
File created F:\autorun.inf C:\Windows\server.exe N/A
File opened for modification F:\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\SolararB5.1.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 queried \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
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 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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4904 wrote to memory of 2852 N/A C:\Users\Admin\AppData\Local\Temp\SolararB5.1.exe C:\Windows\server.exe
PID 4904 wrote to memory of 2852 N/A C:\Users\Admin\AppData\Local\Temp\SolararB5.1.exe C:\Windows\server.exe
PID 4904 wrote to memory of 2852 N/A C:\Users\Admin\AppData\Local\Temp\SolararB5.1.exe C:\Windows\server.exe
PID 2852 wrote to memory of 2816 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe
PID 2852 wrote to memory of 2816 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe
PID 2852 wrote to memory of 2816 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe
PID 2852 wrote to memory of 4684 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe
PID 2852 wrote to memory of 4684 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe
PID 2852 wrote to memory of 4684 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe
PID 2852 wrote to memory of 1512 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe
PID 2852 wrote to memory of 1512 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe
PID 2852 wrote to memory of 1512 N/A C:\Windows\server.exe C:\Windows\SysWOW64\netsh.exe

Processes

C:\Users\Admin\AppData\Local\Temp\SolararB5.1.exe

"C:\Users\Admin\AppData\Local\Temp\SolararB5.1.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

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4280,i,6522675234395427298,2952738987384583032,262144 --variations-seed-version --mojo-platform-channel-handle=4360 /prefetch:8

Network

Country Destination Domain Proto
US 13.107.42.16:443 tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 76.234.34.23.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
N/A 127.0.0.1:446 tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 92.12.20.2.in-addr.arpa udp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
US 199.232.210.172:80 tcp
US 8.8.8.8:53 82.90.14.23.in-addr.arpa udp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
US 8.8.8.8:53 80.90.14.23.in-addr.arpa udp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp
N/A 127.0.0.1:446 tcp

Files

memory/4904-0-0x00000000750B2000-0x00000000750B3000-memory.dmp

memory/4904-1-0x00000000750B0000-0x0000000075661000-memory.dmp

memory/4904-2-0x00000000750B0000-0x0000000075661000-memory.dmp

C:\Windows\server.exe

MD5 dcff6f093bdaf3d7df4845f39834ea27
SHA1 d304cbd44a432a8e7b756f4bc4da770cd4abba8a
SHA256 199199951d5ec31ad1f699ee996d96524e5022a8af45797777d16488224424d5
SHA512 842471ed4edcf6b1a9c5e6c4c06209a1ab8058619b5122b5b95c2917322f23f59004a275cce313dc1b44a831b42d2f77613cb79fb3ebaf94551e3d94b39a80cf

memory/4904-13-0x00000000750B0000-0x0000000075661000-memory.dmp

memory/2852-14-0x00000000750B0000-0x0000000075661000-memory.dmp

memory/2852-16-0x00000000750B0000-0x0000000075661000-memory.dmp

memory/2852-15-0x00000000750B0000-0x0000000075661000-memory.dmp

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

MD5 d43c5b07c128b116b7bc8faf7b8efa9d
SHA1 dd3540ad4ae14b21b665d108cf4570c2dfa6a6fa
SHA256 80ad1cc7b3a784dad618a445af0c8cf3efa903f82a814756f2aaa7b57f45791f
SHA512 618b01e2b808e1954d011635dfdf63bc75855145208fc5cae33ce09c7e5b43cf978f6511beb311765e6920e728a290c9f9ced7563e40e8ff8d093d50fdc18334

memory/2852-55-0x00000000750B0000-0x0000000075661000-memory.dmp

memory/2852-54-0x00000000750B0000-0x0000000075661000-memory.dmp

memory/2852-56-0x00000000750B0000-0x0000000075661000-memory.dmp