blacknet | 3a671436eef9a4767c71e55e6179dd53da0ad15fbb63ad678ba02e4a0504117c

General

Target

84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
Size

86KB
MD5

ad9e6ee16b3abd3f757c8b5357de6042
SHA1

f324263dc0b46991bb0ed664577910c4f4de8009
SHA256

84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4
SHA512

428453f17a3c7829e8d6719fb605439ac26368be25113c179af2fa03e2b064e523eae1043998d54dd5ce07626012c43ffede666dec431013183eef990e0d8235
SSDEEP

1536:zW27RutYPWEBQlIGOO1g4W6j6hMbv4UFZLrkjj1RZ:5g1g49jcMbvLFxrkjF

Score

10^/10

blacknet evasion persistence trojan

Malware Config

Signatures

BlackNET
BlackNET is an open source remote access tool written in VB.NET.
trojan blacknet

Contains code to disable Windows Defender 4 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

Processes:

resource	yara_rule
behavioral1/memory/936-54-0x0000000000080000-0x000000000009A000-memory.dmp	disable_win_def
C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe	disable_win_def
C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe	disable_win_def
behavioral1/memory/1532-64-0x0000000000960000-0x000000000097A000-memory.dmp	disable_win_def

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

T1112

Modify Existing Service

T1031

Disabling Security Tools

T1089

Processes:

84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe

Executes dropped EXE 1 IoCs

Processes:

WindowsUpdate.exe

pid process

1532 WindowsUpdate.exe

pid	process
1532	WindowsUpdate.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

WindowsUpdate.exe84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Features	WindowsUpdate.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Features	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Windows\CurrentVersion\Run\edd3d42a2f83b252a9c7c412bfbb2d3c = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Microsoft\\MyClient\\WindowsUpdate.exe"	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exeWindowsUpdate.exepowershell.exepowershell.exe

pid process

936 84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
1532 WindowsUpdate.exe
1076 powershell.exe
864 powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exepowershell.exeWindowsUpdate.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	936	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
Token: SeDebugPrivilege	1076	powershell.exe
Token: SeDebugPrivilege	1532	WindowsUpdate.exe
Token: SeDebugPrivilege	864	powershell.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exeWindowsUpdate.exe

pid	process
936	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
936	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
1532	WindowsUpdate.exe
1532	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exeWindowsUpdate.exe

description	pid	process	target process
PID 936 wrote to memory of 1076	936	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe	powershell.exe
PID 936 wrote to memory of 1076	936	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe	powershell.exe
PID 936 wrote to memory of 1076	936	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe	powershell.exe
PID 936 wrote to memory of 1532	936	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe	WindowsUpdate.exe
PID 936 wrote to memory of 1532	936	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe	WindowsUpdate.exe
PID 936 wrote to memory of 1532	936	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe	WindowsUpdate.exe
PID 1532 wrote to memory of 864	1532	WindowsUpdate.exe	powershell.exe
PID 1532 wrote to memory of 864	1532	WindowsUpdate.exe	powershell.exe
PID 1532 wrote to memory of 864	1532	WindowsUpdate.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
"C:\Users\Admin\AppData\Local\Temp\84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe"
1⤵
- Modifies Windows Defender Real-time Protection settings
- Windows security modification
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:936

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1076

C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
"C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe"
2⤵
- Executes dropped EXE
- Windows security modification
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1532

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:864

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

3

T1112

Disabling Security Tools

2

T1089

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
Filesize
86KB

MD5
ad9e6ee16b3abd3f757c8b5357de6042

SHA1
f324263dc0b46991bb0ed664577910c4f4de8009

SHA256
84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4

SHA512
428453f17a3c7829e8d6719fb605439ac26368be25113c179af2fa03e2b064e523eae1043998d54dd5ce07626012c43ffede666dec431013183eef990e0d8235

Download Submit
C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
Filesize
86KB

MD5
ad9e6ee16b3abd3f757c8b5357de6042

SHA1
f324263dc0b46991bb0ed664577910c4f4de8009

SHA256
84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4

SHA512
428453f17a3c7829e8d6719fb605439ac26368be25113c179af2fa03e2b064e523eae1043998d54dd5ce07626012c43ffede666dec431013183eef990e0d8235

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Filesize
7KB

MD5
1f8bba8e86a548ff95abd6683852d20f

SHA1
fb6e5815124059da064dce23abe2ce8287fc98a3

SHA256
e209407dfdb91b5ed01c1bad689e5608956e8d26c800eef4c8086f9f8429ed9e

SHA512
66b3ad206454a9f0519c65e6de0b716add74b51a62a44e53beba88c967d706658ec9537eefacf0332d1dca3ba90f3a0344f61fa701af2f9c757eb849aba92047

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\CQCZ0K2M6C5W8ONVBFNS.temp
Filesize
7KB

MD5
1f8bba8e86a548ff95abd6683852d20f

SHA1
fb6e5815124059da064dce23abe2ce8287fc98a3

SHA256
e209407dfdb91b5ed01c1bad689e5608956e8d26c800eef4c8086f9f8429ed9e

SHA512
66b3ad206454a9f0519c65e6de0b716add74b51a62a44e53beba88c967d706658ec9537eefacf0332d1dca3ba90f3a0344f61fa701af2f9c757eb849aba92047

Download Submit
memory/864-90-0x00000000024F0000-0x0000000002570000-memory.dmp

Filesize
512KB

Download
memory/864-92-0x00000000024FB000-0x0000000002532000-memory.dmp

Filesize
220KB

Download
memory/864-91-0x00000000024F0000-0x0000000002570000-memory.dmp

Filesize
512KB

Download
memory/864-89-0x00000000024F0000-0x0000000002570000-memory.dmp

Filesize
512KB

Download
memory/864-88-0x0000000001ED0000-0x0000000001ED8000-memory.dmp

Filesize
32KB

Download
memory/864-87-0x000000001B210000-0x000000001B4F2000-memory.dmp

Filesize
2.9MB

Download
memory/936-57-0x00000000001F0000-0x0000000000270000-memory.dmp

Filesize
512KB

Download
memory/936-54-0x0000000000080000-0x000000000009A000-memory.dmp

Filesize
104KB

Download
memory/936-56-0x00000000001F0000-0x0000000000270000-memory.dmp

Filesize
512KB

Download
memory/936-55-0x00000000001F0000-0x0000000000270000-memory.dmp

Filesize
512KB

Download
memory/1076-69-0x000000001B210000-0x000000001B4F2000-memory.dmp

Filesize
2.9MB

Download
memory/1076-76-0x0000000002800000-0x0000000002880000-memory.dmp

Filesize
512KB

Download
memory/1076-70-0x0000000002390000-0x0000000002398000-memory.dmp

Filesize
32KB

Download
memory/1076-71-0x0000000002800000-0x0000000002880000-memory.dmp

Filesize
512KB

Download
memory/1076-77-0x000000000280B000-0x0000000002842000-memory.dmp

Filesize
220KB

Download
memory/1076-72-0x0000000002800000-0x0000000002880000-memory.dmp

Filesize
512KB

Download
memory/1532-80-0x0000000002230000-0x00000000022B0000-memory.dmp

Filesize
512KB

Download
memory/1532-75-0x0000000002230000-0x00000000022B0000-memory.dmp

Filesize
512KB

Download
memory/1532-74-0x0000000002230000-0x00000000022B0000-memory.dmp

Filesize
512KB

Download
memory/1532-73-0x0000000002230000-0x00000000022B0000-memory.dmp

Filesize
512KB

Download
memory/1532-81-0x0000000002230000-0x00000000022B0000-memory.dmp

Filesize
512KB

Download
memory/1532-79-0x0000000002230000-0x00000000022B0000-memory.dmp

Filesize
512KB

Download
memory/1532-78-0x0000000002230000-0x00000000022B0000-memory.dmp

Filesize
512KB

Download
memory/1532-64-0x0000000000960000-0x000000000097A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads