blacknet | b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674

Analysis

max time kernel
120s
max time network
108s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-10-2024 19:04

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General

Target

b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
Size

80KB
MD5

48f13dd7931c3013fa7efce935c72fc0
SHA1

32f6dee4821e1e2d5577ce74728cc24b2aece72d
SHA256

b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674
SHA512

dc01c8e1592c09a7721a873421fee42084245f8b79d3c946cf125f1a3b4540b1e18e41f73b59dbf7280409799b454708f42bfbed9a1afbcbac826dae112af5ae
SSDEEP

1536:dPvK/3zvzVQtCsscKvW3jzJxuOmb54vHTL6lm:diqCspDzVmb5uHv6lm

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

BlackNET payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/files/0x0012000000023b2a-19.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/0x0012000000023b2a-19.dat	disable_win_def

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

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

Processes:

b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.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:

b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe

Executes dropped EXE 1 IoCs

Processes:

WindowsUpdate.exe

pid	Process
2396	WindowsUpdate.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cde2f914e4cce7f13b2c1cec7b6da970 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Microsoft\\MyClient\\WindowsUpdate.exe"	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exepowershell.exeWindowsUpdate.exe

pid	Process
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
3060	powershell.exe
3060	powershell.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe
2396	WindowsUpdate.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exepowershell.exeWindowsUpdate.exepowershell.exe

description	pid	Process
Token: SeDebugPrivilege	1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
Token: SeDebugPrivilege	3060	powershell.exe
Token: SeDebugPrivilege	2396	WindowsUpdate.exe
Token: SeDebugPrivilege	4388	powershell.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exeWindowsUpdate.exe

description	pid	Process	procid_target
PID 1464 wrote to memory of 3060	1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe	90
PID 1464 wrote to memory of 3060	1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe	90
PID 1464 wrote to memory of 2396	1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe	92
PID 1464 wrote to memory of 2396	1464	b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe	92
PID 2396 wrote to memory of 4388	2396	WindowsUpdate.exe	94
PID 2396 wrote to memory of 4388	2396	WindowsUpdate.exe	94

C:\Users\Admin\AppData\Local\Temp\b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.exe
"C:\Users\Admin\AppData\Local\Temp\b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674N.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:1464
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3060
- 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 WriteProcessMemory
  PID:2396
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell" Get-MpPreference -verbose
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4388

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

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
80KB

MD5
48f13dd7931c3013fa7efce935c72fc0

SHA1
32f6dee4821e1e2d5577ce74728cc24b2aece72d

SHA256
b1855dd1295dfd331135beb83c5991bf54e9a10abc8374dc153e5308da4e9674

SHA512
dc01c8e1592c09a7721a873421fee42084245f8b79d3c946cf125f1a3b4540b1e18e41f73b59dbf7280409799b454708f42bfbed9a1afbcbac826dae112af5ae

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_th5almtx.y2t.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1464-14-0x00007FF9185E0000-0x00007FF918F81000-memory.dmp

Filesize
9.6MB

Download
memory/1464-5-0x00007FF9185E0000-0x00007FF918F81000-memory.dmp

Filesize
9.6MB

Download
memory/1464-6-0x0000000001230000-0x0000000001238000-memory.dmp

Filesize
32KB

Download
memory/1464-7-0x000000001C600000-0x000000001C64C000-memory.dmp

Filesize
304KB

Download
memory/1464-8-0x00007FF9185E0000-0x00007FF918F81000-memory.dmp

Filesize
9.6MB

Download
memory/1464-9-0x00007FF9185E0000-0x00007FF918F81000-memory.dmp

Filesize
9.6MB

Download
memory/1464-10-0x000000001F7B0000-0x000000001F812000-memory.dmp

Filesize
392KB

Download
memory/1464-13-0x00007FF9185E0000-0x00007FF918F81000-memory.dmp

Filesize
9.6MB

Download
memory/1464-0-0x00007FF918895000-0x00007FF918896000-memory.dmp

Filesize
4KB

Download
memory/1464-15-0x00007FF9185E0000-0x00007FF918F81000-memory.dmp

Filesize
9.6MB

Download
memory/1464-16-0x00007FF9185E0000-0x00007FF918F81000-memory.dmp

Filesize
9.6MB

Download
memory/1464-4-0x000000001C4A0000-0x000000001C53C000-memory.dmp

Filesize
624KB

Download
memory/1464-1-0x000000001B8F0000-0x000000001B996000-memory.dmp

Filesize
664KB

Download
memory/1464-2-0x00007FF9185E0000-0x00007FF918F81000-memory.dmp

Filesize
9.6MB

Download
memory/1464-3-0x000000001BF10000-0x000000001C3DE000-memory.dmp

Filesize
4.8MB

Download
memory/1464-33-0x00007FF9185E0000-0x00007FF918F81000-memory.dmp

Filesize
9.6MB

Download
memory/2396-32-0x00007FF9185E0000-0x00007FF918F81000-memory.dmp

Filesize
9.6MB

Download
memory/2396-30-0x00007FF9185E0000-0x00007FF918F81000-memory.dmp

Filesize
9.6MB

Download
memory/2396-29-0x00007FF9185E0000-0x00007FF918F81000-memory.dmp

Filesize
9.6MB

Download
memory/2396-58-0x00007FF9185E0000-0x00007FF918F81000-memory.dmp

Filesize
9.6MB

Download
memory/2396-59-0x00007FF9185E0000-0x00007FF918F81000-memory.dmp

Filesize
9.6MB

Download
memory/2396-60-0x00007FF9185E0000-0x00007FF918F81000-memory.dmp

Filesize
9.6MB

Download
memory/3060-34-0x000002B343AE0000-0x000002B343B02000-memory.dmp

Filesize
136KB

Download