blacknet | f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c

Analysis

max time kernel
10s
max time network
151s
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 05:03

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General

Target

f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
Size

70KB
MD5

4c14dd1ffe5711ac901c3a28ef4d7c99
SHA1

7cecd069b50c26a0ce3a210ee5d26cc14a305d12
SHA256

f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c
SHA512

a9eca2d167c0a16d667b04f354e6d20450a8435dff054d29f7f920e1c2518ded21d1164d4e6265c5b5cca612eec671e30b80eaf91489c14771e2a26454cead31
SSDEEP

1536:gFTnqpKxynVSGeifCSzTPb542HkLbvJfxa:gFTTGeifrvb59H+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
behavioral2/files/0x000d000000023b47-17.dat	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
behavioral2/files/0x000d000000023b47-17.dat	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:

f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe

Executes dropped EXE 1 IoCs

Processes:

WindowsUpdate.exe

pid	Process
1924	WindowsUpdate.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exeWindowsUpdate.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\2965b7eabf9eb6ce83de7d2260ab71ba = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Microsoft\\MyClient\\WindowsUpdate.exe"	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\2965b7eabf9eb6ce83de7d2260ab71ba = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Microsoft\\MyClient\\WindowsUpdate.exe"	WindowsUpdate.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\2965b7eabf9eb6ce83de7d2260ab71ba = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe"	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 56 IoCs

Processes:

f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exeWindowsUpdate.exe

pid	Process
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe
1924	WindowsUpdate.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exeWindowsUpdate.exe

description	pid	Process
Token: SeDebugPrivilege	4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
Token: SeDebugPrivilege	1924	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe

description	pid	Process	procid_target
PID 4684 wrote to memory of 1924	4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe	91
PID 4684 wrote to memory of 1924	4684	f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe	91

C:\Users\Admin\AppData\Local\Temp\f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe
"C:\Users\Admin\AppData\Local\Temp\f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4684
- 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:1924

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

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Downloads

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

Filesize
70KB

MD5
4c14dd1ffe5711ac901c3a28ef4d7c99

SHA1
7cecd069b50c26a0ce3a210ee5d26cc14a305d12

SHA256
f9742488b450df4dd0242f1f5ac5df77ad6e2b26af9d45b9934744d3c53c622c

SHA512
a9eca2d167c0a16d667b04f354e6d20450a8435dff054d29f7f920e1c2518ded21d1164d4e6265c5b5cca612eec671e30b80eaf91489c14771e2a26454cead31

Download Submit
memory/1924-44-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-36-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-53-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-52-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-51-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-50-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-49-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-48-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-47-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-45-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-38-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-54-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-43-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-42-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-55-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-41-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-30-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-31-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-33-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-40-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-35-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-39-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-37-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/1924-46-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/4684-10-0x000000001CCE0000-0x000000001CD42000-memory.dmp

Filesize
392KB

Download
memory/4684-34-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/4684-29-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/4684-28-0x00007FFB2A235000-0x00007FFB2A236000-memory.dmp

Filesize
4KB

Download
memory/4684-24-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/4684-14-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/4684-13-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/4684-0-0x00007FFB2A235000-0x00007FFB2A236000-memory.dmp

Filesize
4KB

Download
memory/4684-9-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/4684-8-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/4684-7-0x000000001C020000-0x000000001C06C000-memory.dmp

Filesize
304KB

Download
memory/4684-6-0x000000001B300000-0x000000001B308000-memory.dmp

Filesize
32KB

Download
memory/4684-5-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/4684-4-0x000000001BEC0000-0x000000001BF5C000-memory.dmp

Filesize
624KB

Download
memory/4684-3-0x000000001B8B0000-0x000000001BD7E000-memory.dmp

Filesize
4.8MB

Download
memory/4684-2-0x00007FFB29F80000-0x00007FFB2A921000-memory.dmp

Filesize
9.6MB

Download
memory/4684-1-0x000000001B330000-0x000000001B3D6000-memory.dmp

Filesize
664KB

Download