blacknet | 97ac2f7c9ff8e79aa217a8bac22bc9575cecb39bc87bcd753d428c56ea4899c9

General

Target

c77e5db3244e658843f06ae2e61ad95f.exe
Size

133KB
MD5

c77e5db3244e658843f06ae2e61ad95f
SHA1

5bcf4c83cd1218db713c1be89369e368c6c0f115
SHA256

97ac2f7c9ff8e79aa217a8bac22bc9575cecb39bc87bcd753d428c56ea4899c9
SHA512

0d62eaaf493e840d4fe0c96cde1d8d1c76377789c1e99817426e39d16573a4a8de722d3c337a100e2a3c74bea7f1d89e5e494b0587b4c6114eb33b8b0c31d339
SSDEEP

3072:BI7KpEaKA2L22xYWVVz8pWzWpBZ7ubozFyTO1wbCl9fGJu:u7kKAhI8pWzWpB0boQMZGJ

Score

10^/10

blacknet ec evasion persistence trojan

Malware Config

Extracted

Family

blacknet

Botnet

ec

C2

NriE0EakUiK+22Ai4N6Othh0De1s55kV0+sFoXChkQhcVCI2dUu3XGlBV5pu/x/cmJ/BByQIf9PqFghM2sWKP07Iz1Om2nFj+5Ad12ZaY4I9PtWNNix+MC57LiawhMvDUqvUZ0D9AMzT8Ml3Nn9NF/VG4jr2jwHli/295QeYGFGuN7RO/IqZPFblPfaRqq3BNeE7xgdHFMHJVcwvHA4s0oso3I6avTLaxL57NqpSPVJhEZ1yPk4qQWERPXxXoS+1Wp4lQUuVgRpkdjgjhF3IjONn1RIO+3lwJvDoUCLTzG1IxQGrYB+xHSLQ6jCzByfdvDqCc0Jpf0uylVa3q6zmPQ==

Mutex

BN[UfwxTUeC-7463479]

Attributes

antivm
false
elevate_uac
true
install_name
WindowsUpdate.exe
splitter
|BN|
start_name
cde2f914e4cce7f13b2c1cec7b6da970
startup
false
usb_spread
true

Signatures

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

BlackNET payload 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe	family_blacknet
C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe	family_blacknet

Contains code to disable Windows Defender 2 IoCs

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

Processes:

resource	yara_rule
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:

c77e5db3244e658843f06ae2e61ad95f.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	c77e5db3244e658843f06ae2e61ad95f.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	c77e5db3244e658843f06ae2e61ad95f.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	c77e5db3244e658843f06ae2e61ad95f.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	c77e5db3244e658843f06ae2e61ad95f.exe

Checks computer location settings 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

c77e5db3244e658843f06ae2e61ad95f.exeWindowsUpdate.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	c77e5db3244e658843f06ae2e61ad95f.exe
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	WindowsUpdate.exe

Executes dropped EXE 1 IoCs

Processes:

WindowsUpdate.exe

pid process

1000 WindowsUpdate.exe

pid	process
1000	WindowsUpdate.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

c77e5db3244e658843f06ae2e61ad95f.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cde2f914e4cce7f13b2c1cec7b6da970 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Microsoft\\MyClient\\WindowsUpdate.exe"	c77e5db3244e658843f06ae2e61ad95f.exe

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

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

4852 schtasks.exe

pid	process
4852	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

c77e5db3244e658843f06ae2e61ad95f.exepowershell.exeWindowsUpdate.exe

pid	process
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
1988	powershell.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
1988	powershell.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
2324	c77e5db3244e658843f06ae2e61ad95f.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe
1000	WindowsUpdate.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

c77e5db3244e658843f06ae2e61ad95f.exepowershell.exeWindowsUpdate.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	2324	c77e5db3244e658843f06ae2e61ad95f.exe
Token: SeDebugPrivilege	1988	powershell.exe
Token: SeDebugPrivilege	1000	WindowsUpdate.exe
Token: SeDebugPrivilege	4952	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

c77e5db3244e658843f06ae2e61ad95f.exeWindowsUpdate.exe

description	pid	process	target process
PID 2324 wrote to memory of 1988	2324	c77e5db3244e658843f06ae2e61ad95f.exe	powershell.exe
PID 2324 wrote to memory of 1988	2324	c77e5db3244e658843f06ae2e61ad95f.exe	powershell.exe
PID 2324 wrote to memory of 1000	2324	c77e5db3244e658843f06ae2e61ad95f.exe	WindowsUpdate.exe
PID 2324 wrote to memory of 1000	2324	c77e5db3244e658843f06ae2e61ad95f.exe	WindowsUpdate.exe
PID 1000 wrote to memory of 4952	1000	WindowsUpdate.exe	powershell.exe
PID 1000 wrote to memory of 4952	1000	WindowsUpdate.exe	powershell.exe
PID 1000 wrote to memory of 4852	1000	WindowsUpdate.exe	schtasks.exe
PID 1000 wrote to memory of 4852	1000	WindowsUpdate.exe	schtasks.exe
PID 1000 wrote to memory of 3380	1000	WindowsUpdate.exe	svchosts.exe
PID 1000 wrote to memory of 3380	1000	WindowsUpdate.exe	svchosts.exe

C:\Users\Admin\AppData\Local\Temp\c77e5db3244e658843f06ae2e61ad95f.exe
"C:\Users\Admin\AppData\Local\Temp\c77e5db3244e658843f06ae2e61ad95f.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 WriteProcessMemory
PID:2324

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1988

C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
"C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe"
2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1000

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:4952

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /sc ONSTART /RL HIGHEST /tn "'WindowsUpdate"' /tr "'C:\Users\Admin\AppData\Local\Temp\WindowsUpdate.exe"'
3⤵
- Creates scheduled task(s)
PID:4852

C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\svchosts.exe
"C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\svchosts.exe"
3⤵
PID:3380

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

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\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

Download Submit
C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
Filesize
133KB

MD5
c77e5db3244e658843f06ae2e61ad95f

SHA1
5bcf4c83cd1218db713c1be89369e368c6c0f115

SHA256
97ac2f7c9ff8e79aa217a8bac22bc9575cecb39bc87bcd753d428c56ea4899c9

SHA512
0d62eaaf493e840d4fe0c96cde1d8d1c76377789c1e99817426e39d16573a4a8de722d3c337a100e2a3c74bea7f1d89e5e494b0587b4c6114eb33b8b0c31d339

Download Submit
C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
Filesize
133KB

MD5
c77e5db3244e658843f06ae2e61ad95f

SHA1
5bcf4c83cd1218db713c1be89369e368c6c0f115

SHA256
97ac2f7c9ff8e79aa217a8bac22bc9575cecb39bc87bcd753d428c56ea4899c9

SHA512
0d62eaaf493e840d4fe0c96cde1d8d1c76377789c1e99817426e39d16573a4a8de722d3c337a100e2a3c74bea7f1d89e5e494b0587b4c6114eb33b8b0c31d339

Download Submit
C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\svchosts.exe
Filesize
18KB

MD5
d133d370c3858c9811e70f95d554d2c6

SHA1
bb09b1253ce571a49b76951283883a3499588295

SHA256
87a1711030512dd414bcbab0659a2b51c0c16505bd8a068a282a1cc2c9fdf93b

SHA512
db4d41fca43e496b2b0d8d47d936a9ce204e3b6c4c669a8a9810362776a977b5337359b843fcd1d20004455d2c91f9790b3accb5352f4e55ec53c7e5d359d778

Download Submit
C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\svchosts.exe
Filesize
18KB

MD5
d133d370c3858c9811e70f95d554d2c6

SHA1
bb09b1253ce571a49b76951283883a3499588295

SHA256
87a1711030512dd414bcbab0659a2b51c0c16505bd8a068a282a1cc2c9fdf93b

SHA512
db4d41fca43e496b2b0d8d47d936a9ce204e3b6c4c669a8a9810362776a977b5337359b843fcd1d20004455d2c91f9790b3accb5352f4e55ec53c7e5d359d778

Download Submit
memory/1000-150-0x0000000000919000-0x000000000091F000-memory.dmp

Filesize
24KB

Download
memory/1000-138-0x000000001BA80000-0x000000001C4B6000-memory.dmp

Filesize
10.2MB

Download
memory/1000-156-0x00000000217A0000-0x00000000217A4000-memory.dmp

Filesize
16KB

Download
memory/1000-155-0x0000000000919000-0x000000000091F000-memory.dmp

Filesize
24KB

Download
memory/1000-153-0x00000000217A0000-0x00000000217A4000-memory.dmp

Filesize
16KB

Download
memory/1000-135-0x0000000000000000-mapping.dmp

Download
memory/1988-142-0x00007FFC504C0000-0x00007FFC50F81000-memory.dmp

Filesize
10.8MB

Download
memory/1988-141-0x00007FFC504C0000-0x00007FFC50F81000-memory.dmp

Filesize
10.8MB

Download
memory/1988-134-0x00000212BAE80000-0x00000212BAEA2000-memory.dmp

Filesize
136KB

Download
memory/1988-133-0x0000000000000000-mapping.dmp

Download
memory/2324-139-0x00000000005F9000-0x00000000005FF000-memory.dmp

Filesize
24KB

Download
memory/2324-140-0x0000000021F30000-0x0000000021F34000-memory.dmp

Filesize
16KB

Download
memory/2324-132-0x000000001BDE0000-0x000000001C816000-memory.dmp

Filesize
10.2MB

Download
memory/3380-151-0x000000001BDE0000-0x000000001C816000-memory.dmp

Filesize
10.2MB

Download
memory/3380-146-0x0000000000000000-mapping.dmp

Download
memory/4852-145-0x0000000000000000-mapping.dmp

Download
memory/4952-143-0x0000000000000000-mapping.dmp

Download
memory/4952-154-0x00007FFC504C0000-0x00007FFC50F81000-memory.dmp

Filesize
10.8MB

Download
memory/4952-147-0x00007FFC504C0000-0x00007FFC50F81000-memory.dmp

Filesize
10.8MB

Download
memory/4952-157-0x00007FFC504C0000-0x00007FFC50F81000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads