Malware analysis MailAccess-Checker-V1.exe Malicious activity

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File name:	MailAccess-Checker-V1.exe
Full analysis:	https://app.any.run/tasks/f4d7c08a-65e9-4075-aa2c-fba6f12df761
Verdict:	Malicious activity
Analysis date:	June 19, 2025, 07:49:40
OS:	Windows 10 Professional (build: 19044, 64 bit)
Tags:	pyinstaller python
Indicators:
MIME:	application/vnd.microsoft.portable-executable
File info:	PE32+ executable (console) x86-64, for MS Windows, 6 sections
MD5:	7573AD14E72F4BDED8F19E9774688BA4
SHA1:	DCBB8CDB72C4466FEFF225F56223CCCE0D9F1CE5
SHA256:	DEA6801FC6727CF29E3C2D30D8E6A10B2188C3523004F98E94386A4B1693B7FE
SSDEEP:	98304:2VIyDHd1E1ug9Jj8XKtZ+ixfil/Xu58d3UcBUaqL0ynqSO+Evepqczwevzqd25Tl:u4WI4er3R433LnAUbrUyh

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:: 240 seconds
Heavy Evasion option:: off
Network geolocation:: off
Additional time used:: 180 seconds
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 (133.0.6943.127)
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 (133.0.3065.92)
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) (136.0)
Mozilla Maintenance Service (136.0)
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)
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
No malicious indicators.
SUSPICIOUS
- Process drops legitimate windows executable
  - MailAccess-Checker-V1.exe (PID: 7100)
- Executable content was dropped or overwritten
  - MailAccess-Checker-V1.exe (PID: 7100)
- Process drops python dynamic module
  - MailAccess-Checker-V1.exe (PID: 7100)
- The process drops C-runtime libraries
  - MailAccess-Checker-V1.exe (PID: 7100)
- Application launched itself
  - MailAccess-Checker-V1.exe (PID: 7100)
- Starts CMD.EXE for commands execution
  - MailAccess-Checker-V1.exe (PID: 6516)
- Loads Python modules
  - MailAccess-Checker-V1.exe (PID: 6516)
- There is functionality for taking screenshot (YARA)
  - MailAccess-Checker-V1.exe (PID: 6516)
INFO
- Checks supported languages
  - MailAccess-Checker-V1.exe (PID: 7100)
  - MailAccess-Checker-V1.exe (PID: 6516)
- Reads the computer name
  - MailAccess-Checker-V1.exe (PID: 7100)
- The sample compiled with english language support
  - MailAccess-Checker-V1.exe (PID: 7100)
- Create files in a temporary directory
  - MailAccess-Checker-V1.exe (PID: 7100)
- PyInstaller has been detected (YARA)
  - MailAccess-Checker-V1.exe (PID: 7100)
  - MailAccess-Checker-V1.exe (PID: 6516)
- Checks operating system version
  - MailAccess-Checker-V1.exe (PID: 6516)
- Reads the machine GUID from the registry
  - MailAccess-Checker-V1.exe (PID: 6516)

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

.exe	\|	InstallShield setup (57.6)
.exe	\|	Win64 Executable (generic) (36.9)
.exe	\|	Generic Win/DOS Executable (2.6)
.exe	\|	DOS Executable Generic (2.6)

EXIF

EXE

MachineType:	AMD AMD64
TimeStamp:	2025:06:16 01:16:14+00:00
ImageFileCharacteristics:	Executable, Large address aware
PEType:	PE32+
LinkerVersion:	14.4
CodeSize:	176640
InitializedDataSize:	363520
UninitializedDataSize:	-
EntryPoint:	0xc320
OSVersion:	6
ImageVersion:	-
SubsystemVersion:	6
Subsystem:	Windows command line

No data.

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All screenshots are available in the full report

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Total processes

139

Monitored processes

Malicious processes

Suspicious processes

Behavior graph

Click at the process to see the details

Process information

PID

CMD

Path

Indicators

Parent process

6516

"C:\Users\admin\AppData\Local\Temp\MailAccess-Checker-V1.exe"

C:\Users\admin\AppData\Local\Temp\MailAccess-Checker-V1.exe

—

MailAccess-Checker-V1.exe

User:

admin

Integrity Level:

MEDIUM

Modules

Images
c:\users\admin\appdata\local\temp\mailaccess-checker-v1.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\apphelp.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

6620

\??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1

C:\Windows\System32\conhost.exe

—

MailAccess-Checker-V1.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Console Window Host

Version:

10.0.19041.1 (WinBuild.160101.0800)

Modules

Images
c:\windows\system32\conhost.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcp_win.dll
c:\windows\system32\ucrtbase.dll
c:\windows\system32\shcore.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\combase.dll
c:\windows\system32\rpcrt4.dll

6636

C:\WINDOWS\system32\cmd.exe /c "ver"

C:\Windows\System32\cmd.exe

—

MailAccess-Checker-V1.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Windows Command Processor

Exit code:

Version:

10.0.19041.1 (WinBuild.160101.0800)

Modules

Images
c:\windows\system32\cmd.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\apphelp.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\combase.dll
c:\windows\system32\ucrtbase.dll
c:\windows\system32\rpcrt4.dll

7056

C:\WINDOWS\System32\slui.exe -Embedding

C:\Windows\System32\slui.exe

—

svchost.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

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

7100

"C:\Users\admin\AppData\Local\Temp\MailAccess-Checker-V1.exe"

C:\Users\admin\AppData\Local\Temp\MailAccess-Checker-V1.exe

explorer.exe

User:

admin

Integrity Level:

MEDIUM

Modules

Images
c:\users\admin\appdata\local\temp\mailaccess-checker-v1.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\apphelp.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

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Total events

467

Read events

467

Write events

Delete events

Modification events

No data

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Executable files

Suspicious files

Text files

921

Unknown types

Dropped files

PID	Process	Filename		Type
7100	MailAccess-Checker-V1.exe	C:\Users\admin\AppData\Local\Temp\_MEI71002\_tcl_data\encoding\cp1250.enc		text
		MD5:9568EDE60D3F917F1671F5A625A801C4	SHA256:E2991A6F7A7A4D8D3C4C97947298FD5BACB3EAA2F898CEE17F5E21A9861B9626
7100	MailAccess-Checker-V1.exe	C:\Users\admin\AppData\Local\Temp\_MEI71002\_tcl_data\encoding\cp1252.enc		text
		MD5:E9117326C06FEE02C478027CB625C7D8	SHA256:741859CF238C3A63BBB20EC6ED51E46451372BB221CFFF438297D261D0561C2E
7100	MailAccess-Checker-V1.exe	C:\Users\admin\AppData\Local\Temp\_MEI71002\_tcl_data\encoding\big5.enc		text
		MD5:41A874778111CC218BD421CF9C795EC2	SHA256:AD1ED201B69855BFD353BF969DFC55576DA35A963ABF1BF7FC6D8B5142A61A61
7100	MailAccess-Checker-V1.exe	C:\Users\admin\AppData\Local\Temp\_MEI71002\_queue.pyd		executable
		MD5:AAC0035F5B5868A3E92DF59F19E00773	SHA256:1FF1C01BE25FD6797B263474C1C8DF45107796A7E4D465E32A908D572D647B64
7100	MailAccess-Checker-V1.exe	C:\Users\admin\AppData\Local\Temp\_MEI71002\_tcl_data\clock.tcl		text
		MD5:88BB44A1364147FDD80F9FD78FBCEF61	SHA256:1947F8B188AB4AB6AA72EA68A58D2D9ADD0894FDF320F6B074EAE0F198368FB7
7100	MailAccess-Checker-V1.exe	C:\Users\admin\AppData\Local\Temp\_MEI71002\_tcl_data\auto.tcl		text
		MD5:08EDF746B4A088CB4185C165177BD604	SHA256:517204EE436D08EFC287ABC97433C3BFFCAF42EC6592A3009B9FD3B985AD772C
7100	MailAccess-Checker-V1.exe	C:\Users\admin\AppData\Local\Temp\_MEI71002\_tcl_data\encoding\cns11643.enc		text
		MD5:B6A7C59E6A48D91CC2DBCB2BBA7E4510	SHA256:8924545CC92584169138AADB64683C07BBF846A57014C2E668D23B63F43F3610
7100	MailAccess-Checker-V1.exe	C:\Users\admin\AppData\Local\Temp\_MEI71002\_pytransform.dll		executable
		MD5:ECC976778257EC37019AF4A4530A1003	SHA256:A71932FF7D5A1C66998DB37A3BB4BBD1DF0BAFFDD29B4380692AD6C44B401E87
7100	MailAccess-Checker-V1.exe	C:\Users\admin\AppData\Local\Temp\_MEI71002\_ssl.pyd		executable
		MD5:E7D8BBCA8B419F220C8CD81B285CB4AE	SHA256:5E54983CB975784A358B2A02738D9DB1296E0AB7AEE1503277D3FDD8CF43E41C
7100	MailAccess-Checker-V1.exe	C:\Users\admin\AppData\Local\Temp\_MEI71002\_tcl_data\encoding\cp1253.enc		text
		MD5:441B86A0DE77F25C91DF1CD4685F651D	SHA256:5B8D47451F847C1BDE12CACA3739CA29860553C0B6399EE990D51B26F9A69722

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
5012	svchost.exe	GET	200	2.17.190.73:80	http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D	unknown	—	—	whitelisted
1268	svchost.exe	GET	200	23.35.229.160:80	http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl	unknown	—	—	whitelisted
1268	svchost.exe	GET	200	23.48.23.156:80	http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl	unknown	—	—	whitelisted
5124	SIHClient.exe	GET	200	23.35.229.160:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl	unknown	—	—	whitelisted
5124	SIHClient.exe	GET	200	23.35.229.160:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.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	System	192.168.100.255:137	—	—	—	whitelisted
1268	svchost.exe	51.104.136.2:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
5232	RUXIMICS.exe	51.104.136.2:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
5944	MoUsoCoreWorker.exe	51.104.136.2:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
4	System	192.168.100.255:138	—	—	—	whitelisted
5012	svchost.exe	20.190.159.23:443	login.live.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
5012	svchost.exe	2.17.190.73:80	ocsp.digicert.com	AKAMAI-AS	DE	whitelisted
2336	svchost.exe	172.211.123.249:443	client.wns.windows.com	MICROSOFT-CORP-MSN-AS-BLOCK	FR	whitelisted
1268	svchost.exe	23.48.23.156:80	crl.microsoft.com	Akamai International B.V.	DE	whitelisted
1268	svchost.exe	23.35.229.160:80	www.microsoft.com	AKAMAI-AS	DE	whitelisted

DNS requests

Domain	IP	Reputation
google.com	142.250.185.206	whitelisted
login.live.com	20.190.159.23 40.126.31.0 40.126.31.2 20.190.159.73 20.190.159.64 20.190.159.68 20.190.159.130 20.190.159.129	whitelisted
ocsp.digicert.com	2.17.190.73	whitelisted
settings-win.data.microsoft.com	51.104.136.2 20.73.194.208	whitelisted
client.wns.windows.com	172.211.123.249	whitelisted
crl.microsoft.com	23.48.23.156 23.48.23.143	whitelisted
www.microsoft.com	23.35.229.160	whitelisted
nexusrules.officeapps.live.com	52.111.229.43	whitelisted
slscr.update.microsoft.com	172.202.163.200	whitelisted
fe3cr.delivery.mp.microsoft.com	20.3.187.198	whitelisted

Threats

No threats detected

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No debug info

General Info

MailAccess-Checker-V1.exe

7573AD14E72F4BDED8F19E9774688BA4

DCBB8CDB72C4466FEFF225F56223CCCE0D9F1CE5

DEA6801FC6727CF29E3C2D30D8E6A10B2188C3523004F98E94386A4B1693B7FE

98304:2VIyDHd1E1ug9Jj8XKtZ+ixfil/Xu58d3UcBUaqL0ynqSO+Evepqczwevzqd25Tl:u4WI4er3R433LnAUbrUyh

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

SUSPICIOUS

Process drops legitimate windows executable

Executable content was dropped or overwritten

Process drops python dynamic module

The process drops C-runtime libraries

Application launched itself

Starts CMD.EXE for commands execution

Loads Python modules

There is functionality for taking screenshot (YARA)

INFO

Checks supported languages

Reads the computer name

The sample compiled with english language support

Create files in a temporary directory

PyInstaller has been detected (YARA)

Checks operating system version

Reads the machine GUID from the registry

Malware configuration

Static information

TRiD

EXIF

EXE

Video and screenshots

Processes

Behavior graph

Specs description

Process information

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