blacknet | 13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c

Analysis

max time kernel
10s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
22-10-2024 12:35

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
Size

70KB
MD5

d94ef7acefbc20ddea7c5509b4b0bc90
SHA1

f6dd42a0e47980823acedbba7d063b63f17fe8e4
SHA256

13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c
SHA512

c8a10a85cdaea99360a45119e803a7059983f9453731eb58174b9409f85b182dbbc6fabab49137bc8946d9f4e3afd1df03853818557656b66760b0832f0f1062
SSDEEP

1536:gFTnqpKxynVWGeifCSzTPb542HkLbvJfxa:gFTPGeifrvb59H+bvJ5a

Score

10^/10

blacknet persistence trojan

Malware Config

Signatures

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

BlackNET payload 1 IoCs

Processes:

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

Contains code to disable Windows Defender 1 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

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:

13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe

Executes dropped EXE 1 IoCs

Processes:

WindowsUpdate.exe

pid process

2728 WindowsUpdate.exe

pid	process
2728	WindowsUpdate.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exeWindowsUpdate.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\2965b7eabf9eb6ce83de7d2260ab71ba = "C:\\Users\\Admin\\AppData\\Local\\Temp\\13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe"	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\2965b7eabf9eb6ce83de7d2260ab71ba = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Microsoft\\MyClient\\WindowsUpdate.exe"	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\2965b7eabf9eb6ce83de7d2260ab71ba = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Microsoft\\MyClient\\WindowsUpdate.exe"	WindowsUpdate.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 57 IoCs

Processes:

13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exeWindowsUpdate.exe

pid	process
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe
2728	WindowsUpdate.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exeWindowsUpdate.exe

description	pid	process
Token: SeDebugPrivilege	4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
Token: SeDebugPrivilege	2728	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe

description	pid	process	target process
PID 4088 wrote to memory of 2728	4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe	WindowsUpdate.exe
PID 4088 wrote to memory of 2728	4088	13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe	WindowsUpdate.exe

C:\Users\Admin\AppData\Local\Temp\13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe
"C:\Users\Admin\AppData\Local\Temp\13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4088
- C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
  "C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2728

C:\Windows\system32\sihost.exe
sihost.exe
1⤵
PID:2492

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
70KB

MD5
d94ef7acefbc20ddea7c5509b4b0bc90

SHA1
f6dd42a0e47980823acedbba7d063b63f17fe8e4

SHA256
13e2a1bcc72fa5a6366d3ce2a21f283ed8bdd50d5f41038c909f0a6b9633337c

SHA512
c8a10a85cdaea99360a45119e803a7059983f9453731eb58174b9409f85b182dbbc6fabab49137bc8946d9f4e3afd1df03853818557656b66760b0832f0f1062

Download Submit
memory/2728-41-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-42-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-52-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-50-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-49-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-48-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-47-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-46-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-32-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-45-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-44-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-43-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-39-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-38-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-37-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-36-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-30-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-31-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-40-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/2728-51-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/4088-3-0x000000001BB10000-0x000000001BFDE000-memory.dmp

Filesize
4.8MB

Download
memory/4088-1-0x0000000000EF0000-0x0000000000F96000-memory.dmp

Filesize
664KB

Download
memory/4088-10-0x000000001CEC0000-0x000000001CF22000-memory.dmp

Filesize
392KB

Download
memory/4088-13-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/4088-15-0x00007FFBC4C95000-0x00007FFBC4C96000-memory.dmp

Filesize
4KB

Download
memory/4088-35-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/4088-0-0x00007FFBC4C95000-0x00007FFBC4C96000-memory.dmp

Filesize
4KB

Download
memory/4088-26-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/4088-2-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/4088-14-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/4088-16-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/4088-8-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/4088-7-0x000000001C160000-0x000000001C1AC000-memory.dmp

Filesize
304KB

Download
memory/4088-6-0x000000001B4A0000-0x000000001B4A8000-memory.dmp

Filesize
32KB

Download
memory/4088-5-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/4088-4-0x000000001BFE0000-0x000000001C07C000-memory.dmp

Filesize
624KB

Download
memory/4088-33-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download
memory/4088-9-0x00007FFBC49E0000-0x00007FFBC5381000-memory.dmp

Filesize
9.6MB

Download