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
behavioral2/memory/4028-134-0x0000000000E20000-0x0000000000E3A000-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
C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe	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
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
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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe

Executes dropped EXE 1 IoCs

Processes:

WindowsUpdate.exe

pid process

2704 WindowsUpdate.exe

pid	process
2704	WindowsUpdate.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-1-5-21-1529757233-3489015626-3409890339-1000\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 46 IoCs

Processes:

84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exepowershell.exeWindowsUpdate.exe

pid	process
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
5068	powershell.exe
5068	powershell.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exepowershell.exeWindowsUpdate.exe

description	pid	process
Token: SeDebugPrivilege	4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
Token: SeDebugPrivilege	5068	powershell.exe
Token: SeDebugPrivilege	2704	WindowsUpdate.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exeWindowsUpdate.exe

pid	process
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe
2704	WindowsUpdate.exe
2704	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe

description	pid	process	target process
PID 4028 wrote to memory of 5068	4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe	powershell.exe
PID 4028 wrote to memory of 5068	4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe	powershell.exe
PID 4028 wrote to memory of 2704	4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe	WindowsUpdate.exe
PID 4028 wrote to memory of 2704	4028	84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4.exe	WindowsUpdate.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
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4028

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:5068

C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
"C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2704

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

2

T1112

Disabling Security Tools

1

T1089

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
Filesize
86KB

MD5
ad9e6ee16b3abd3f757c8b5357de6042

SHA1
f324263dc0b46991bb0ed664577910c4f4de8009

SHA256
84298e0b46665ad3825b9344fbda6ac8d75a6e9ccc44eab5b40a70555e4718f4

SHA512
428453f17a3c7829e8d6719fb605439ac26368be25113c179af2fa03e2b064e523eae1043998d54dd5ce07626012c43ffede666dec431013183eef990e0d8235

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_srlpldai.ekd.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2704-193-0x000000001C6C0000-0x000000001CE17000-memory.dmp

Filesize
7.3MB

Download
memory/2704-195-0x0000000001320000-0x0000000001330000-memory.dmp

Filesize
64KB

Download
memory/2704-196-0x0000000001320000-0x0000000001330000-memory.dmp

Filesize
64KB

Download
memory/2704-192-0x0000000001320000-0x0000000001330000-memory.dmp

Filesize
64KB

Download
memory/2704-191-0x0000000001320000-0x0000000001330000-memory.dmp

Filesize
64KB

Download
memory/2704-190-0x0000000001320000-0x0000000001330000-memory.dmp

Filesize
64KB

Download
memory/2704-189-0x0000000001320000-0x0000000001330000-memory.dmp

Filesize
64KB

Download
memory/2704-188-0x0000000001320000-0x0000000001330000-memory.dmp

Filesize
64KB

Download
memory/2704-194-0x0000000001320000-0x0000000001330000-memory.dmp

Filesize
64KB

Download
memory/2704-197-0x0000000001320000-0x0000000001330000-memory.dmp

Filesize
64KB

Download
memory/2704-198-0x0000000001320000-0x0000000001330000-memory.dmp

Filesize
64KB

Download
memory/4028-140-0x0000000001700000-0x0000000001710000-memory.dmp

Filesize
64KB

Download
memory/4028-144-0x0000000020920000-0x0000000020982000-memory.dmp

Filesize
392KB

Download
memory/4028-150-0x0000000001700000-0x0000000001710000-memory.dmp

Filesize
64KB

Download
memory/4028-148-0x0000000001700000-0x0000000001710000-memory.dmp

Filesize
64KB

Download
memory/4028-134-0x0000000000E20000-0x0000000000E3A000-memory.dmp

Filesize
104KB

Download
memory/4028-147-0x0000000001700000-0x0000000001710000-memory.dmp

Filesize
64KB

Download
memory/4028-146-0x0000000001700000-0x0000000001710000-memory.dmp

Filesize
64KB

Download
memory/4028-145-0x000000001CB30000-0x000000001D287000-memory.dmp

Filesize
7.3MB

Download
memory/4028-185-0x000000001CB30000-0x000000001D287000-memory.dmp

Filesize
7.3MB

Download
memory/4028-149-0x0000000001700000-0x0000000001710000-memory.dmp

Filesize
64KB

Download
memory/4028-142-0x0000000001700000-0x0000000001710000-memory.dmp

Filesize
64KB

Download
memory/4028-143-0x0000000001700000-0x0000000001710000-memory.dmp

Filesize
64KB

Download
memory/4028-133-0x0000000001700000-0x0000000001710000-memory.dmp

Filesize
64KB

Download
memory/4028-141-0x0000000001700000-0x0000000001710000-memory.dmp

Filesize
64KB

Download
memory/4028-139-0x000000001CAE0000-0x000000001CB2C000-memory.dmp

Filesize
304KB

Download
memory/4028-138-0x00000000016E0000-0x00000000016E8000-memory.dmp

Filesize
32KB

Download
memory/4028-137-0x000000001C830000-0x000000001C8CC000-memory.dmp

Filesize
624KB

Download
memory/4028-136-0x000000001C250000-0x000000001C71E000-memory.dmp

Filesize
4.8MB

Download
memory/4028-135-0x000000001BC80000-0x000000001BD26000-memory.dmp

Filesize
664KB

Download
memory/5068-168-0x0000022FDD660000-0x0000022FDD682000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads