Malware analysis Flexer.exe Malicious activity | ANY.RUN

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File name:	Flexer.exe
Full analysis:	https://app.any.run/tasks/b722667e-0934-4806-9932-a71004da11f7
Verdict:	Malicious activity
Analysis date:	November 26, 2024, 13:28:40
OS:	Windows 10 Professional (build: 19045, 64 bit)
Indicators:
MIME:	application/vnd.microsoft.portable-executable
File info:	PE32+ executable (console) x86-64, for MS Windows, 6 sections
MD5:	FC4CD4BE96C610321FFD4702AF38995A
SHA1:	5B108A03642AB855D3CF541F540BD5AE147155A6
SHA256:	FDDBF31C5C1996B42B50C381EA5F284F85D8F69C89C18AA8E2514F7B1FAD8F8B
SSDEEP:	98304:3c8oaYNAg/Yk981g1HUsYkV2R5LYZEHrDz3JhZEfvJGqSPgVNlm2d4ApzGWFR5sK:5gvt7qGXDbfK5HYfF5

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:: 120 seconds
Heavy Evasion option:
Network geolocation:: off
Additional time used:: 60 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 (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
No malicious indicators.
SUSPICIOUS
- Executable content was dropped or overwritten
  - Flexer.exe (PID: 6624)
- The process drops C-runtime libraries
  - Flexer.exe (PID: 6624)
- Process drops python dynamic module
  - Flexer.exe (PID: 6624)
- Process drops legitimate windows executable
  - Flexer.exe (PID: 6624)
INFO
- Checks supported languages
  - Flexer.exe (PID: 6624)
- Create files in a temporary directory
  - Flexer.exe (PID: 6624)

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	\|	Win64 Executable (generic) (87.3)
.exe	\|	Generic Win/DOS Executable (6.3)
.exe	\|	DOS Executable Generic (6.3)

EXIF

EXE

MachineType:	AMD AMD64
TimeStamp:	2024:11:26 06:51:00+00:00
ImageFileCharacteristics:	Executable, Large address aware
PEType:	PE32+
LinkerVersion:	14.42
CodeSize:	131072
InitializedDataSize:	11226112
UninitializedDataSize:	-
EntryPoint:	0xc88c
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

119

Monitored processes

Malicious processes

Suspicious processes

Behavior graph

Click at the process to see the details

Process information

PID

CMD

Path

Indicators

Parent process

6624

"C:\Users\admin\AppData\Local\Temp\Flexer.exe"

C:\Users\admin\AppData\Local\Temp\Flexer.exe

explorer.exe

User:

admin

Integrity Level:

MEDIUM

Exit code:

Modules

Images
c:\users\admin\appdata\local\temp\flexer.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\apphelp.dll
c:\windows\system32\shell32.dll
c:\windows\system32\msvcp_win.dll
c:\windows\system32\ucrtbase.dll
c:\windows\system32\user32.dll
c:\windows\system32\win32u.dll

6632

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

C:\Windows\System32\conhost.exe

—

Flexer.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Console Window Host

Exit code:

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

6992

C:\Users\admin\AppData\Local\Temp\Flexer.exe

C:\Users\admin\AppData\Local\Temp\onefile_6624_133771013366053043\Loader.exe

—

Flexer.exe

User:

admin

Integrity Level:

MEDIUM

Exit code:

Modules

Images
c:\users\admin\appdata\local\temp\onefile_6624_133771013366053043\loader.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\apphelp.dll
c:\users\admin\appdata\local\temp\onefile_6624_133771013366053043\python313.dll
c:\windows\system32\ws2_32.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\version.dll
c:\windows\system32\bcrypt.dll

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Total events

646

Read events

646

Write events

Delete events

Modification events

No data

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Executable files

Suspicious files

Text files

923

Unknown types

Dropped files

PID	Process	Filename		Type
6624	Flexer.exe	C:\Users\admin\AppData\Local\Temp\onefile_6624_133771013366053043\_ctypes.pyd		executable
		MD5:A55E57D7594303C89B5F7A1D1D6F2B67	SHA256:F63C6C7E71C342084D8F1A108786CA6975A52CEFEF8BE32CC2589E6E2FE060C8
6624	Flexer.exe	C:\Users\admin\AppData\Local\Temp\onefile_6624_133771013366053043\_queue.pyd		executable
		MD5:1C03CAA59B5E4A7FB9B998D8C1DA165A	SHA256:B9CF502DADCB124F693BF69ECD7077971E37174104DBDA563022D74961A67E1E
6624	Flexer.exe	C:\Users\admin\AppData\Local\Temp\onefile_6624_133771013366053043\Loader.exe		executable
		MD5:4B482ADEA16A69F93E6F562B32D041B0	SHA256:8CF9B87D20DBF123AC018C30D66F02D0082469B964A6458A13BDD2FB35F60FAC
6624	Flexer.exe	C:\Users\admin\AppData\Local\Temp\onefile_6624_133771013366053043\libssl-3.dll		executable
		MD5:4FF168AAA6A1D68E7957175C8513F3A2	SHA256:2E4D35B681A172D3298CAF7DC670451BE7A8BA27C26446EFC67470742497A950
6624	Flexer.exe	C:\Users\admin\AppData\Local\Temp\onefile_6624_133771013366053043\libffi-8.dll		executable
		MD5:0F8E4992CA92BAAF54CC0B43AACCCE21	SHA256:EFF52743773EB550FCC6CE3EFC37C85724502233B6B002A35496D828BD7B280A
6624	Flexer.exe	C:\Users\admin\AppData\Local\Temp\onefile_6624_133771013366053043\libcrypto-3.dll		executable
		MD5:123AD0908C76CCBA4789C084F7A6B8D0	SHA256:4E5D5D20D6D31E72AB341C81E97B89E514326C4C861B48638243BDF0918CFA43
6624	Flexer.exe	C:\Users\admin\AppData\Local\Temp\onefile_6624_133771013366053043\_lzma.pyd		executable
		MD5:1BA022D42024A655CF289544AE461FB8	SHA256:D080EABD015A3569813A220FD4EA74DFF34ED2A8519A10473EB37E22B1118A06
6624	Flexer.exe	C:\Users\admin\AppData\Local\Temp\onefile_6624_133771013366053043\_decimal.pyd		executable
		MD5:F3377F3DE29579140E2BBAEEFD334D4F	SHA256:B715D1C18E9A9C1531F21C02003B4C6726742D1A2441A1893BC3D79D7BB50E91
6624	Flexer.exe	C:\Users\admin\AppData\Local\Temp\onefile_6624_133771013366053043\_socket.pyd		executable
		MD5:FE896371430BD9551717EF12A3E7E818	SHA256:35246B04C6C7001CA448554246445A845CE116814A29B18B617EA38752E4659B
6624	Flexer.exe	C:\Users\admin\AppData\Local\Temp\onefile_6624_133771013366053043\_wmi.pyd		executable
		MD5:1C30CC7DF3BD168D883E93C593890B43	SHA256:6435C679A3A3FF4F16708EBC43F7CA62456C110AC1EA94F617D8052C90C143C7

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
4712	MoUsoCoreWorker.exe	GET	200	2.16.164.49:80	http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl	unknown	—	—	whitelisted
1468	svchost.exe	GET	200	2.16.164.49:80	http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl	unknown	—	—	whitelisted
1468	svchost.exe	GET	200	88.221.169.152:80	http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl	unknown	—	—	whitelisted
4712	MoUsoCoreWorker.exe	GET	200	88.221.169.152:80	http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl	unknown	—	—	whitelisted
—	—	GET	200	192.229.221.95:80	http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTrjrydRyt%2BApF3GSPypfHBxR5XtQQUs9tIpPmhxdiuNkHMEWNpYim8S8YCEAI5PUjXAkJafLQcAAsO18o%3D	unknown	—	—	whitelisted
1176	svchost.exe	GET	200	192.229.221.95:80	http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D	unknown	—	—	whitelisted
6748	SIHClient.exe	GET	200	2.16.253.202:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl	unknown	—	—	whitelisted
6748	SIHClient.exe	GET	200	2.16.253.202:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl	unknown	—	—	whitelisted
5720	backgroundTaskHost.exe	GET	200	192.229.221.95:80	http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEAn5bsKVVV8kdJ6vHl3O1J0%3D	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
—	—	40.127.240.158:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
4712	MoUsoCoreWorker.exe	2.16.164.49:80	crl.microsoft.com	Akamai International B.V.	NL	whitelisted
1468	svchost.exe	2.16.164.49:80	crl.microsoft.com	Akamai International B.V.	NL	whitelisted
4712	MoUsoCoreWorker.exe	88.221.169.152:80	www.microsoft.com	AKAMAI-AS	DE	whitelisted
1468	svchost.exe	88.221.169.152:80	www.microsoft.com	AKAMAI-AS	DE	whitelisted
—	—	2.23.209.177:443	www.bing.com	Akamai International B.V.	GB	whitelisted
—	—	192.229.221.95:80	ocsp.digicert.com	EDGECAST	US	whitelisted
4	System	192.168.100.255:138	—	—	—	whitelisted
1176	svchost.exe	20.190.160.17:443	login.live.com	MICROSOFT-CORP-MSN-AS-BLOCK	NL	whitelisted

DNS requests

Domain	IP	Reputation
settings-win.data.microsoft.com	40.127.240.158 20.73.194.208	whitelisted
crl.microsoft.com	2.16.164.49 2.16.164.106 2.16.164.9	whitelisted
www.microsoft.com	88.221.169.152 2.16.253.202	whitelisted
google.com	142.250.186.78	whitelisted
www.bing.com	2.23.209.177 2.23.209.174 2.23.209.166 2.23.209.173 2.23.209.167 2.23.209.176 2.23.209.171 2.23.209.162 2.23.209.168	whitelisted
ocsp.digicert.com	192.229.221.95	whitelisted
login.live.com	20.190.160.17 40.126.32.134 40.126.32.136 40.126.32.68 40.126.32.76 40.126.32.133 20.190.160.14 40.126.32.74	whitelisted
go.microsoft.com	184.28.89.167	whitelisted
slscr.update.microsoft.com	52.149.20.212	whitelisted
fe3cr.delivery.mp.microsoft.com	40.69.42.241	whitelisted

Threats

No threats detected

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No debug info

General Info

Flexer.exe

FC4CD4BE96C610321FFD4702AF38995A

5B108A03642AB855D3CF541F540BD5AE147155A6

FDDBF31C5C1996B42B50C381EA5F284F85D8F69C89C18AA8E2514F7B1FAD8F8B

98304:3c8oaYNAg/Yk981g1HUsYkV2R5LYZEHrDz3JhZEfvJGqSPgVNlm2d4ApzGWFR5sK:5gvt7qGXDbfK5HYfF5

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

SUSPICIOUS

Executable content was dropped or overwritten

The process drops C-runtime libraries

Process drops python dynamic module

Process drops legitimate windows executable

INFO

Checks supported languages

Create files in a temporary directory

Malware configuration

Static information

TRiD

EXIF

EXE

Video and screenshots

Processes

Behavior graph

Specs description

Process information

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