Malware Analysis Report

2025-03-15 06:27

Sample ID 240120-x53lmsffe8
Target ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e.exe
SHA256 ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e
Tags
hacked njrat persistence trojan
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e

Threat Level: Known bad

The file ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e.exe was found to be: Known bad.

Malicious Activity Summary

hacked njrat persistence trojan

Njrat family

njRAT/Bladabindi

Checks computer location settings

Drops startup file

Executes dropped EXE

Adds Run key to start application

Drops file in Windows directory

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-01-20 19:27

Signatures

Njrat family

njrat

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-01-20 19:27

Reported

2024-01-20 19:29

Platform

win7-20231129-en

Max time kernel

149s

Max time network

139s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e.exe"

Signatures

njRAT/Bladabindi

trojan njrat

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Java update.exe C:\Windows\Dllhost.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Java update.exe C:\Windows\Dllhost.exe N/A

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Update = "\"C:\\Windows\\Dllhost.exe\" .." C:\Windows\Dllhost.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Update = "\"C:\\Windows\\Dllhost.exe\" .." C:\Windows\Dllhost.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Dllhost.exe C:\Users\Admin\AppData\Local\Temp\ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e.exe N/A
File opened for modification C:\Windows\Dllhost.exe C:\Windows\Dllhost.exe N/A

Enumerates physical storage devices

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e.exe N/A
N/A N/A C:\Windows\Dllhost.exe N/A

Suspicious use of AdjustPrivilegeToken

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

Processes

C:\Users\Admin\AppData\Local\Temp\ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e.exe

"C:\Users\Admin\AppData\Local\Temp\ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e.exe"

C:\Windows\Dllhost.exe

"C:\Windows\Dllhost.exe"

Network

Country Destination Domain Proto
RU 178.187.164.4:7777 tcp
RU 178.187.164.4:7777 tcp
RU 178.187.164.4:7777 tcp
RU 178.187.164.4:7777 tcp
RU 178.187.164.4:7777 tcp
RU 178.187.164.4:7777 tcp

Files

memory/2060-0-0x0000000001080000-0x0000000001092000-memory.dmp

memory/2060-1-0x0000000074060000-0x000000007474E000-memory.dmp

memory/2060-2-0x00000000006B0000-0x00000000006F0000-memory.dmp

C:\Windows\Dllhost.exe

MD5 1722c8695ca31163d93c6cf56f0c8530
SHA1 aa81bc701216ec1441565275c0bfab69376757a6
SHA256 ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e
SHA512 50830a24bb50df4db8f78522f9b4f65f689fc75d6503c1b4c8a4bb7a662e340adf3f80211523d90a4b838c1fc00d1dc01b1711ab954670b2f0ff609e9d926a1d

memory/3036-9-0x0000000000AE0000-0x0000000000AF2000-memory.dmp

memory/3036-10-0x0000000074060000-0x000000007474E000-memory.dmp

memory/3036-11-0x0000000004630000-0x0000000004670000-memory.dmp

memory/2060-12-0x0000000074060000-0x000000007474E000-memory.dmp

memory/3036-14-0x0000000074060000-0x000000007474E000-memory.dmp

memory/3036-15-0x0000000004630000-0x0000000004670000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-20 19:27

Reported

2024-01-20 19:29

Platform

win10v2004-20231222-en

Max time kernel

150s

Max time network

146s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e.exe"

Signatures

njRAT/Bladabindi

trojan njrat

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e.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\Java update.exe C:\Windows\Dllhost.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Java update.exe C:\Windows\Dllhost.exe N/A

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Update = "\"C:\\Windows\\Dllhost.exe\" .." C:\Windows\Dllhost.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Update = "\"C:\\Windows\\Dllhost.exe\" .." C:\Windows\Dllhost.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Dllhost.exe C:\Users\Admin\AppData\Local\Temp\ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e.exe N/A
File opened for modification C:\Windows\Dllhost.exe C:\Windows\Dllhost.exe N/A

Enumerates physical storage devices

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e.exe N/A
N/A N/A C:\Windows\Dllhost.exe N/A

Suspicious use of AdjustPrivilegeToken

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

Processes

C:\Users\Admin\AppData\Local\Temp\ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e.exe

"C:\Users\Admin\AppData\Local\Temp\ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e.exe"

C:\Windows\Dllhost.exe

"C:\Windows\Dllhost.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 27.139.73.23.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
RU 178.187.164.4:7777 tcp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
RU 178.187.164.4:7777 tcp
RU 178.187.164.4:7777 tcp
US 8.8.8.8:53 211.178.17.96.in-addr.arpa udp
RU 178.187.164.4:7777 tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
RU 178.187.164.4:7777 tcp
RU 178.187.164.4:7777 tcp
US 8.8.8.8:53 63.141.182.52.in-addr.arpa udp

Files

memory/3124-1-0x00000000745F0000-0x0000000074DA0000-memory.dmp

memory/3124-2-0x0000000005170000-0x000000000520C000-memory.dmp

memory/3124-0-0x0000000000700000-0x0000000000712000-memory.dmp

memory/3124-3-0x0000000005350000-0x0000000005360000-memory.dmp

memory/3124-4-0x00000000059A0000-0x0000000005F44000-memory.dmp

memory/3124-5-0x00000000054E0000-0x0000000005572000-memory.dmp

C:\Windows\Dllhost.exe

MD5 1722c8695ca31163d93c6cf56f0c8530
SHA1 aa81bc701216ec1441565275c0bfab69376757a6
SHA256 ef432c721d03728f4828aaecd2db265474fc13306b0d0f042df5025f2b4d9e2e
SHA512 50830a24bb50df4db8f78522f9b4f65f689fc75d6503c1b4c8a4bb7a662e340adf3f80211523d90a4b838c1fc00d1dc01b1711ab954670b2f0ff609e9d926a1d

memory/3124-15-0x00000000745F0000-0x0000000074DA0000-memory.dmp

memory/4396-16-0x00000000745F0000-0x0000000074DA0000-memory.dmp

memory/4396-18-0x0000000005880000-0x000000000588A000-memory.dmp

memory/4396-19-0x00000000745F0000-0x0000000074DA0000-memory.dmp