Malware analysis /Nkgyx.zip Malicious activity | ANY.RUN

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download:	/Nkgyx.zip
Full analysis:	https://app.any.run/tasks/4c6e9d75-d639-4602-94a2-3c6326623779
Verdict:	Malicious activity
Threats:	First identified in March 2021, PureCrypter is a .NET-based loader that employs obfuscation techniques, such as SmartAssembly, to evade detection. It has been used to distribute malware families including AgentTesla, RedLine Stealer, and SnakeKeylogger. The malware is typically delivered through phishing campaigns and malicious downloads, often masquerading as legitimate files with extensions like .mp4 or .pdf. PureCrypter utilizes encryption and compression to conceal its payloads and can inject malicious code into legitimate processes to maintain persistence on the infected system. Malware Trends Tracker >>>
Analysis date:	April 04, 2025, 08:04:46
OS:	Windows 10 Professional (build: 19044, 64 bit)
Tags:	arch-exec purecrypter netreactor
Indicators:
MIME:	application/zip
File info:	Zip archive data, at least v2.0 to extract, compression method=deflate
MD5:	C3078D6D69D2D52C9A73158FBFCCCB16
SHA1:	DAFEF353878BEF008FF526A4EDC1885B56AF936E
SHA256:	8CC70FA793C6A086FC1DFAD3C3EE210DD1CC158BBFB4B6AE2EF915F9CE233ED4
SSDEEP:	1536:faebZmcfiaR2ZGmFK6jU2PUrE5KbzuSMrross3Yg4IuH1v0zKiT:Sebhi7ZGmFK0PUE5mSSMJs3JjsR0zN

ANY.RUN is an interactive service which provides full access to the guest system. Information in this report could be distorted by user actions and is provided for user acknowledgement as it is. ANY.RUN does not guarantee maliciousness or safety of the content.

Launch configuration

Task duration:: 60 seconds
Heavy Evasion option:: off
Network geolocation:: off
Additional time used:: none
MITM proxy:: off
Privacy:: Public submission
Fakenet option:: off
Route via Tor:: off
Autoconfirmation of UAC:: on
Network:: on

Software preset

Internet Explorer 11.3636.19041.0
Adobe Acrobat (64-bit) (23.001.20093)
Adobe Flash Player 32 NPAPI (32.0.0.465)
Adobe Flash Player 32 PPAPI (32.0.0.465)
CCleaner (6.20)
FileZilla 3.65.0 (3.65.0)
Google Chrome (122.0.6261.70)
Google Update Helper (1.3.36.51)
Java 8 Update 271 (64-bit) (8.0.2710.9)
Java Auto Updater (2.8.271.9)
Microsoft Edge (122.0.2365.59)
Microsoft Edge Update (1.3.185.17)
Microsoft Office Professional 2019 - de-de (16.0.16026.20146)
Microsoft Office Professional 2019 - en-us (16.0.16026.20146)
Microsoft Office Professional 2019 - es-es (16.0.16026.20146)
Microsoft Office Professional 2019 - it-it (16.0.16026.20146)
Microsoft Office Professional 2019 - ja-jp (16.0.16026.20146)
Microsoft Office Professional 2019 - ko-kr (16.0.16026.20146)
Microsoft Office Professional 2019 - pt-br (16.0.16026.20146)
Microsoft Office Professional 2019 - tr-tr (16.0.16026.20146)
Microsoft Office Professionnel 2019 - fr-fr (16.0.16026.20146)
Microsoft Office профессиональный 2019 - ru-ru (16.0.16026.20146)
Microsoft OneNote - en-us (16.0.16026.20146)
Microsoft Update Health Tools (3.74.0.0)
Microsoft Visual C++ 2013 Redistributable (x64) - 12.0.30501 (12.0.30501.0)
Microsoft Visual C++ 2013 x64 Additional Runtime - 12.0.21005 (12.0.21005)
Microsoft Visual C++ 2013 x64 Minimum Runtime - 12.0.21005 (12.0.21005)
Microsoft Visual C++ 2015-2022 Redistributable (x64) - 14.36.32532 (14.36.32532.0)
Microsoft Visual C++ 2015-2022 Redistributable (x86) - 14.36.32532 (14.36.32532.0)
Microsoft Visual C++ 2022 X64 Additional Runtime - 14.36.32532 (14.36.32532)
Microsoft Visual C++ 2022 X64 Minimum Runtime - 14.36.32532 (14.36.32532)
Microsoft Visual C++ 2022 X86 Additional Runtime - 14.36.32532 (14.36.32532)
Microsoft Visual C++ 2022 X86 Minimum Runtime - 14.36.32532 (14.36.32532)
Mozilla Firefox (x64 en-US) (123.0)
Mozilla Maintenance Service (123.0)
Notepad++ (64-bit x64) (7.9.1)
Office 16 Click-to-Run Extensibility Component (16.0.15726.20202)
Office 16 Click-to-Run Licensing Component (16.0.16026.20146)
Office 16 Click-to-Run Localization Component (16.0.15726.20202)
Office 16 Click-to-Run Localization Component (16.0.15928.20198)
PowerShell 7-x64 (7.3.5.0)
Skype version 8.104 (8.104)
Update for Windows 10 for x64-based Systems (KB4023057) (2.59.0.0)
Update for Windows 10 for x64-based Systems (KB4023057) (2.63.0.0)
Update for Windows 10 for x64-based Systems (KB4480730) (2.55.0.0)
Update for Windows 10 for x64-based Systems (KB5001716) (8.93.0.0)
VLC media player (3.0.11)
WinRAR 5.91 (64-bit) (5.91.0)
Windows PC Health Check (3.6.2204.08001)

Hotfixes

Client LanguagePack Package
DotNetRollup
DotNetRollup 481
FodMetadata Package
Foundation Package
Hello Face Package
InternetExplorer Optional Package
KB5003791
KB5011048
KB5015684
KB5033052
LanguageFeatures Basic en us Package
LanguageFeatures Handwriting en us Package
LanguageFeatures OCR en us Package
LanguageFeatures Speech en us Package
LanguageFeatures TextToSpeech en us Package
MSPaint FoD Package
MediaPlayer Package
Microsoft OneCore ApplicationModel Sync Desktop FOD Package
Microsoft OneCore DirectX Database FOD Package
NetFx3 OnDemand Package
Notepad FoD Package
OpenSSH Client Package
PowerShell ISE FOD Package
Printing PMCPPC FoD Package
Printing WFS FoD Package
ProfessionalEdition
QuickAssist Package
RollupFix
ServicingStack
ServicingStack 3989
StepsRecorder Package
TabletPCMath Package
UserExperience Desktop Package
WordPad FoD Package

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MALICIOUS
- Create files in the Startup directory
  - New Order_PO 354688976.scr (PID: 5956)
- PURECRYPTER has been detected (YARA)
  - New Order_PO 354688976.scr (PID: 5956)
SUSPICIOUS
- Starts application with an unusual extension
  - WinRAR.exe (PID: 6068)
- Reads security settings of Internet Explorer
  - WinRAR.exe (PID: 6068)
- Executable content was dropped or overwritten
  - New Order_PO 354688976.scr (PID: 5956)
- Connects to unusual port
  - RegAsm.exe (PID: 4120)
INFO
- Checks proxy server information
  - New Order_PO 354688976.scr (PID: 5956)
  - New Order_PO 354688976.scr (PID: 1568)
- Reads the computer name
  - New Order_PO 354688976.scr (PID: 5956)
  - New Order_PO 354688976.scr (PID: 1568)
  - RegAsm.exe (PID: 4120)
  - RegAsm.exe (PID: 208)
- Disables trace logs
  - New Order_PO 354688976.scr (PID: 5956)
  - New Order_PO 354688976.scr (PID: 1568)
- Reads the machine GUID from the registry
  - New Order_PO 354688976.scr (PID: 5956)
  - New Order_PO 354688976.scr (PID: 1568)
  - RegAsm.exe (PID: 4120)
  - RegAsm.exe (PID: 208)
- Checks supported languages
  - New Order_PO 354688976.scr (PID: 5956)
  - RegAsm.exe (PID: 4120)
  - New Order_PO 354688976.scr (PID: 1568)
  - RegAsm.exe (PID: 208)
- Executable content was dropped or overwritten
  - WinRAR.exe (PID: 6068)
- Reads the software policy settings
  - New Order_PO 354688976.scr (PID: 5956)
  - New Order_PO 354688976.scr (PID: 1568)
- Creates files or folders in the user directory
  - New Order_PO 354688976.scr (PID: 5956)
- Manual execution by a user
  - RegAsm.exe (PID: 4120)
  - New Order_PO 354688976.scr (PID: 1568)
  - RegAsm.exe (PID: 208)
- .NET Reactor protector has been detected
  - New Order_PO 354688976.scr (PID: 5956)

Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report

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No Malware configuration.

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TRiD

.zip	\|	ZIP compressed archive (100)

EXIF

ZIP

ZipRequiredVersion:	20
ZipBitFlag:	-
ZipCompression:	Deflated
ZipModifyDate:	2025:01:28 11:13:28
ZipCRC:	0x8e76f3c7
ZipCompressedSize:	75351
ZipUncompressedSize:	246272
ZipFileName:	New Order_PO 354688976.scr

No data.

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All screenshots are available in the full report

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Total processes

134

Monitored processes

Malicious processes

Suspicious processes

Behavior graph

Click at the process to see the details

Process information

PID

CMD

Path

Indicators

Parent process

208

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

—

explorer.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Microsoft .NET Assembly Registration Utility

Version:

4.8.9037.0 built by: NET481REL1

Modules

Images
c:\windows\microsoft.net\framework\v4.0.30319\regasm.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
c:\windows\system32\wow64.dll
c:\windows\system32\wow64win.dll
c:\windows\system32\wow64cpu.dll
c:\windows\syswow64\mscoree.dll
c:\windows\syswow64\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\apphelp.dll

1568

"C:\Users\admin\Desktop\New Order_PO 354688976.scr" /S

C:\Users\admin\Desktop\New Order_PO 354688976.scr

explorer.exe

User:

admin

Integrity Level:

MEDIUM

Description:

Sorsnpx

Exit code:

4294967295

Version:

1.0.0.0

Modules

Images
c:\users\admin\desktop\new order_po 354688976.scr
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
c:\windows\system32\wow64.dll
c:\windows\system32\wow64win.dll
c:\windows\system32\wow64cpu.dll
c:\windows\syswow64\mscoree.dll
c:\windows\syswow64\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\apphelp.dll

3956

"C:\WINDOWS\System32\SLUI.exe" RuleId=3482d82e-ca2c-4e1f-8864-da0267b484b2;Action=AutoActivate;AppId=55c92734-d682-4d71-983e-d6ec3f16059f;SkuId=4de7cb65-cdf1-4de9-8ae8-e3cce27b9f2c;NotificationInterval=1440;Trigger=TimerEvent

C:\Windows\System32\slui.exe

—

SppExtComObj.Exe

User:

NETWORK SERVICE

Company:

Microsoft Corporation

Integrity Level:

SYSTEM

Description:

Windows Activation Client

Version:

10.0.19041.1 (WinBuild.160101.0800)

Modules

Images
c:\windows\system32\slui.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\bcrypt.dll
c:\windows\system32\user32.dll

4120

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

explorer.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Microsoft .NET Assembly Registration Utility

Version:

4.8.9037.0 built by: NET481REL1

Modules

Images
c:\windows\microsoft.net\framework\v4.0.30319\regasm.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
c:\windows\system32\wow64.dll
c:\windows\system32\wow64win.dll
c:\windows\system32\wow64cpu.dll
c:\windows\syswow64\mscoree.dll
c:\windows\syswow64\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\apphelp.dll

5956

"C:\Users\admin\AppData\Local\Temp\Rar$DIa6068.21942\New Order_PO 354688976.scr" /S

C:\Users\admin\AppData\Local\Temp\Rar$DIa6068.21942\New Order_PO 354688976.scr

WinRAR.exe

User:

admin

Integrity Level:

MEDIUM

Description:

Sorsnpx

Exit code:

4294967295

Version:

1.0.0.0

Modules

Images
c:\users\admin\appdata\local\temp\rar$dia6068.21942\new order_po 354688976.scr
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
c:\windows\system32\wow64.dll
c:\windows\system32\wow64win.dll
c:\windows\system32\wow64cpu.dll
c:\windows\syswow64\mscoree.dll
c:\windows\syswow64\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\apphelp.dll

6068

"C:\Program Files\WinRAR\WinRAR.exe" C:\Users\admin\AppData\Local\Temp\Nkgyx.zip

C:\Program Files\WinRAR\WinRAR.exe

explorer.exe

User:

admin

Company:

Alexander Roshal

Integrity Level:

MEDIUM

Description:

WinRAR archiver

Exit code:

Version:

5.91.0

Modules

Images
c:\program files\winrar\winrar.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\user32.dll
c:\windows\system32\win32u.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\gdi32full.dll
c:\windows\system32\msvcp_win.dll
c:\windows\system32\ucrtbase.dll

6572

C:\WINDOWS\system32\SppExtComObj.exe -Embedding

C:\Windows\System32\SppExtComObj.Exe

—

svchost.exe

User:

NETWORK SERVICE

Company:

Microsoft Corporation

Integrity Level:

SYSTEM

Description:

KMS Connection Broker

Version:

10.0.19041.3996 (WinBuild.160101.0800)

Modules

Images
c:\windows\system32\sppextcomobj.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\bcrypt.dll
c:\windows\system32\oleaut32.dll

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Total events

4 480

Read events

4 432

Write events

Delete events

Modification events


(PID) Process:	(6068) WinRAR.exe	Key:	HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory
Operation:	write	Name:	3
Value: C:\Users\admin\Desktop\preferences.zip
(PID) Process:	(6068) WinRAR.exe	Key:	HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory
Operation:	write	Name:	2
Value: C:\Users\admin\Desktop\chromium_ext.zip
(PID) Process:	(6068) WinRAR.exe	Key:	HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory
Operation:	write	Name:	1
Value: C:\Users\admin\Desktop\omni_23_10_2024_.zip
(PID) Process:	(6068) WinRAR.exe	Key:	HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory
Operation:	write	Name:	0
Value: C:\Users\admin\AppData\Local\Temp\Nkgyx.zip
(PID) Process:	(6068) WinRAR.exe	Key:	HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths
Operation:	write	Name:	name
Value: 120
(PID) Process:	(6068) WinRAR.exe	Key:	HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths
Operation:	write	Name:	size
Value: 80
(PID) Process:	(6068) WinRAR.exe	Key:	HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths
Operation:	write	Name:	type
Value: 120
(PID) Process:	(6068) WinRAR.exe	Key:	HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths
Operation:	write	Name:	mtime
Value: 100
(PID) Process:	(5956) New Order_PO 354688976.scr	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\New Order_PO 354688976_RASAPI32
Operation:	write	Name:	EnableFileTracing
Value: 0
(PID) Process:	(5956) New Order_PO 354688976.scr	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\New Order_PO 354688976_RASAPI32
Operation:	write	Name:	EnableAutoFileTracing
Value: 0

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Executable files

Suspicious files

Text files

Unknown types

Dropped files

PID	Process	Filename		Type
6068	WinRAR.exe	C:\Users\admin\Desktop\New Order_PO 354688976.scr		executable
		MD5:B3877DAB52BF86B35480AE77F8156CC1	SHA256:5F69A72A1D999EBDDAEBD22A7218479A7651C16DB3435D557BC94FB1F3EA1B08
5956	New Order_PO 354688976.scr	C:\Users\admin\AppData\Roaming\KeyAlgorithm.exe		executable
		MD5:B3877DAB52BF86B35480AE77F8156CC1	SHA256:5F69A72A1D999EBDDAEBD22A7218479A7651C16DB3435D557BC94FB1F3EA1B08
6068	WinRAR.exe	C:\Users\admin\AppData\Local\Temp\Rar$DIa6068.21942\New Order_PO 354688976.scr		executable
		MD5:B3877DAB52BF86B35480AE77F8156CC1	SHA256:5F69A72A1D999EBDDAEBD22A7218479A7651C16DB3435D557BC94FB1F3EA1B08
5956	New Order_PO 354688976.scr	C:\Users\admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\KeyAlgorithm.vbs		text
		MD5:398C60E4F742F05D3EAEF11E73C74ED0	SHA256:318BBDDB1CDE7F83EDBCAD8CAF15FBFDD25965FF93C942F35690D14A3DB4D508

Download PCAP, analyze network streams, HTTP content and a lot more at the full report

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HTTP(S) requests

TCP/UDP connections

DNS requests

Threats

HTTP requests

PID	Process	Method	HTTP Code	IP	URL	CN	Type	Size	Reputation
5496	MoUsoCoreWorker.exe	GET	200	23.216.77.23:80	http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl	unknown	—	—	whitelisted
6544	svchost.exe	GET	200	2.17.190.73:80	http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D	unknown	—	—	whitelisted
—	—	GET	200	23.216.77.23:80	http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl	unknown	—	—	whitelisted
5720	SIHClient.exe	GET	200	95.101.149.131:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl	unknown	—	—	whitelisted
5720	SIHClient.exe	GET	200	95.101.149.131:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl	unknown	—	—	whitelisted

Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID	Process	IP	Domain	ASN	CN	Reputation
—	—	4.231.128.59:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
4	System	192.168.100.255:137	—	—	—	whitelisted
4	System	192.168.100.255:138	—	—	—	whitelisted
—	—	23.216.77.23:80	crl.microsoft.com	Akamai International B.V.	DE	whitelisted
5496	MoUsoCoreWorker.exe	23.216.77.23:80	crl.microsoft.com	Akamai International B.V.	DE	whitelisted
3216	svchost.exe	20.197.71.89:443	client.wns.windows.com	MICROSOFT-CORP-MSN-AS-BLOCK	SG	whitelisted
6544	svchost.exe	20.190.159.23:443	login.live.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
6544	svchost.exe	2.17.190.73:80	ocsp.digicert.com	AKAMAI-AS	DE	whitelisted
2104	svchost.exe	51.104.136.2:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
5956	New Order_PO 354688976.scr	163.44.185.218:443	epihealth.jp	GMO Internet,Inc	JP	unknown

DNS requests

Domain	IP	Reputation
settings-win.data.microsoft.com	4.231.128.59 51.104.136.2	whitelisted
google.com	216.58.206.46	whitelisted
crl.microsoft.com	23.216.77.23 23.216.77.18	whitelisted
client.wns.windows.com	20.197.71.89	whitelisted
login.live.com	20.190.159.23 40.126.31.0 40.126.31.73 20.190.159.64 40.126.31.1 20.190.159.71 20.190.159.128 20.190.159.2	whitelisted
ocsp.digicert.com	2.17.190.73	whitelisted
epihealth.jp	163.44.185.218	unknown
slscr.update.microsoft.com	20.109.210.53	whitelisted
www.microsoft.com	95.101.149.131	whitelisted
fe3cr.delivery.mp.microsoft.com	40.69.42.241	whitelisted

Threats

No threats detected

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No debug info

General Info

/Nkgyx.zip

C3078D6D69D2D52C9A73158FBFCCCB16

DAFEF353878BEF008FF526A4EDC1885B56AF936E

8CC70FA793C6A086FC1DFAD3C3EE210DD1CC158BBFB4B6AE2EF915F9CE233ED4

1536:faebZmcfiaR2ZGmFK6jU2PUrE5KbzuSMrross3Yg4IuH1v0zKiT:Sebhi7ZGmFK0PUE5mSSMJs3JjsR0zN

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

Create files in the Startup directory

PURECRYPTER has been detected (YARA)

SUSPICIOUS

Starts application with an unusual extension

Reads security settings of Internet Explorer

Executable content was dropped or overwritten

Connects to unusual port

INFO

Checks proxy server information

Reads the computer name

Disables trace logs

Reads the machine GUID from the registry

Checks supported languages

Executable content was dropped or overwritten

Reads the software policy settings

Creates files or folders in the user directory

Manual execution by a user

.NET Reactor protector has been detected

Malware configuration

Static information

TRiD

EXIF

ZIP

Video and screenshots

Processes

Behavior graph

Specs description

Process information

Information

Modules

Information

Modules

Information

Modules

Information

Modules

Information

Modules

Information

Modules

Information

Modules

Registry activity

Modification events

Files activity

Dropped files

Network activity

HTTP requests

Connections

DNS requests

Threats

Debug output strings