Malware analysis http://shell.windows.com/fileassoc/fileassoc.asp?ext=xxx Malicious activity

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URL:	http://shell.windows.com/fileassoc/fileassoc.asp?ext=xxx
Full analysis:	https://app.any.run/tasks/820412b9-d3e4-46ec-b3b2-a4f48feaa425
Verdict:	Malicious activity
Analysis date:	July 18, 2019, 18:16:25
OS:	Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Indicators:
MD5:	06D203CB5EF9697933E25A273E676B75
SHA1:	41D42653D0AFD47CD488DABCBD1D68516504C264
SHA256:	DEA7707CD47D242776DCB482FB5D48E32C317D1E63595EF16FA7D35AEB954787
SSDEEP:	3:N1KNNWdEDmWNGoEWNGjBYdf:CYwZX

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 8.0.7601.17514 undefined
Adobe Acrobat Reader DC MUI (15.023.20070)
Adobe Flash Player 26 ActiveX (26.0.0.131)
Adobe Flash Player 26 NPAPI (26.0.0.131)
Adobe Flash Player 26 PPAPI (26.0.0.131)
Adobe Refresh Manager (1.8.0)
CCleaner (5.35)
FileZilla Client 3.36.0 (3.36.0)
Google Chrome (75.0.3770.100)
Google Update Helper (1.3.34.7)
Java 8 Update 92 (8.0.920.14)
Java Auto Updater (2.8.92.14)
Microsoft .NET Framework 4.7.2 (4.7.03062)
Microsoft Office Access MUI (English) 2010 (14.0.6029.1000)
Microsoft Office Access Setup Metadata MUI (English) 2010 (14.0.6029.1000)
Microsoft Office Excel MUI (English) 2010 (14.0.6029.1000)
Microsoft Office OneNote MUI (English) 2010 (14.0.6029.1000)
Microsoft Office Outlook MUI (English) 2010 (14.0.6029.1000)
Microsoft Office PowerPoint MUI (English) 2010 (14.0.6029.1000)
Microsoft Office Professional 2010 (14.0.6029.1000)
Microsoft Office Proof (English) 2010 (14.0.6029.1000)
Microsoft Office Proof (French) 2010 (14.0.6029.1000)
Microsoft Office Proof (Spanish) 2010 (14.0.6029.1000)
Microsoft Office Proofing (English) 2010 (14.0.6029.1000)
Microsoft Office Publisher MUI (English) 2010 (14.0.6029.1000)
Microsoft Office Shared MUI (English) 2010 (14.0.6029.1000)
Microsoft Office Shared Setup Metadata MUI (English) 2010 (14.0.6029.1000)
Microsoft Office Single Image 2010 (14.0.6029.1000)
Microsoft Office Word MUI (English) 2010 (14.0.6029.1000)
Microsoft Visual C++ 2008 Redistributable - x86 9.0.30729.6161 (9.0.30729.6161)
Microsoft Visual C++ 2010 x86 Redistributable - 10.0.40219 (10.0.40219)
Microsoft Visual C++ 2013 Redistributable (x86) - 12.0.30501 (12.0.30501.0)
Microsoft Visual C++ 2013 x86 Additional Runtime - 12.0.21005 (12.0.21005)
Microsoft Visual C++ 2013 x86 Minimum Runtime - 12.0.21005 (12.0.21005)
Microsoft Visual C++ 2015-2019 Redistributable (x86) - 14.21.27702 (14.21.27702.2)
Microsoft Visual C++ 2019 X86 Additional Runtime - 14.21.27702 (14.21.27702)
Microsoft Visual C++ 2019 X86 Minimum Runtime - 14.21.27702 (14.21.27702)
Mozilla Firefox 67.0.4 (x86 en-US) (67.0.4)
Notepad++ (32-bit x86) (7.5.1)
Opera 12.15 (12.15.1748)
Skype version 8.29 (8.29)
Update for Microsoft .NET Framework 4.7.2 (KB4087364) (1)
VLC media player (2.2.6)
WinRAR 5.60 (32-bit) (5.60.0)

Hotfixes

Client LanguagePack Package
Client Refresh LanguagePack Package
CodecPack Basic Package
Foundation Package
IE Troubleshooters Package
InternetExplorer Optional Package
KB2534111
KB2999226
KB4019990
KB976902
LocalPack AU Package
LocalPack CA Package
LocalPack GB Package
LocalPack US Package
LocalPack ZA Package
ProfessionalEdition
UltimateEdition

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MALICIOUS
No malicious indicators.
SUSPICIOUS
- Executable content was dropped or overwritten
  - firefox.exe (PID: 3524)
INFO
- Reads CPU info
  - firefox.exe (PID: 3524)
- Application launched itself
  - firefox.exe (PID: 3524)
- Dropped object may contain Bitcoin addresses
  - firefox.exe (PID: 3524)
- Creates files in the user directory
  - firefox.exe (PID: 3524)

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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No data.

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All screenshots are available in the full report

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Total processes

Monitored processes

Malicious processes

Suspicious processes

Behavior graph

Click at the process to see the details

Process information

PID

CMD

Path

Indicators

Parent process

772

"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="3524.20.910570607\720528286" -childID 3 -isForBrowser -prefsHandle 3584 -prefMapHandle 3588 -prefsLen 6720 -prefMapSize 188076 -parentBuildID 20190619235627 -greomni "C:\Program Files\Mozilla Firefox\omni.ja" -appomni "C:\Program Files\Mozilla Firefox\browser\omni.ja" -appdir "C:\Program Files\Mozilla Firefox\browser" - 3524 "\\.\pipe\gecko-crash-server-pipe.3524" 3612 tab

C:\Program Files\Mozilla Firefox\firefox.exe

firefox.exe

User:

admin

Company:

Mozilla Corporation

Integrity Level:

LOW

Description:

Firefox

Exit code:

Version:

67.0.4

Modules

Images
c:\program files\mozilla firefox\firefox.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\mozilla firefox\mozglue.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\dbghelp.dll

1496

"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="3524.13.1025395500\313059851" -childID 2 -isForBrowser -prefsHandle 2744 -prefMapHandle 2748 -prefsLen 5842 -prefMapSize 188076 -parentBuildID 20190619235627 -greomni "C:\Program Files\Mozilla Firefox\omni.ja" -appomni "C:\Program Files\Mozilla Firefox\browser\omni.ja" -appdir "C:\Program Files\Mozilla Firefox\browser" - 3524 "\\.\pipe\gecko-crash-server-pipe.3524" 2768 tab

C:\Program Files\Mozilla Firefox\firefox.exe

firefox.exe

User:

admin

Company:

Mozilla Corporation

Integrity Level:

LOW

Description:

Firefox

Exit code:

Version:

67.0.4

Modules

Images
c:\program files\mozilla firefox\firefox.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\mozilla firefox\mozglue.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\dbghelp.dll

1524

"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="3524.0.1532046491\2004752078" -parentBuildID 20190619235627 -greomni "C:\Program Files\Mozilla Firefox\omni.ja" -appomni "C:\Program Files\Mozilla Firefox\browser\omni.ja" -appdir "C:\Program Files\Mozilla Firefox\browser" - 3524 "\\.\pipe\gecko-crash-server-pipe.3524" 1168 gpu

C:\Program Files\Mozilla Firefox\firefox.exe

—

firefox.exe

User:

admin

Company:

Mozilla Corporation

Integrity Level:

MEDIUM

Description:

Firefox

Exit code:

Version:

67.0.4

Modules

Images
c:\program files\mozilla firefox\firefox.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\mozilla firefox\mozglue.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\dbghelp.dll

3368

"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="3524.27.1339684461\305044434" -childID 4 -isForBrowser -prefsHandle 3788 -prefMapHandle 3820 -prefsLen 6720 -prefMapSize 188076 -parentBuildID 20190619235627 -greomni "C:\Program Files\Mozilla Firefox\omni.ja" -appomni "C:\Program Files\Mozilla Firefox\browser\omni.ja" -appdir "C:\Program Files\Mozilla Firefox\browser" - 3524 "\\.\pipe\gecko-crash-server-pipe.3524" 3832 tab

C:\Program Files\Mozilla Firefox\firefox.exe

firefox.exe

User:

admin

Company:

Mozilla Corporation

Integrity Level:

LOW

Description:

Firefox

Exit code:

Version:

67.0.4

Modules

Images
c:\program files\mozilla firefox\firefox.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\mozilla firefox\mozglue.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\dbghelp.dll

3524

"C:\Program Files\Mozilla Firefox\firefox.exe" "http://shell.windows.com/fileassoc/fileassoc.asp?ext=xxx"

C:\Program Files\Mozilla Firefox\firefox.exe

explorer.exe

User:

admin

Company:

Mozilla Corporation

Integrity Level:

MEDIUM

Description:

Firefox

Exit code:

Version:

67.0.4

Modules

Images
c:\program files\mozilla firefox\firefox.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\mozilla firefox\mozglue.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\dbghelp.dll

3696

"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="3524.3.1533076417\24174709" -childID 1 -isForBrowser -prefsHandle 1328 -prefMapHandle 1804 -prefsLen 1 -prefMapSize 188076 -parentBuildID 20190619235627 -greomni "C:\Program Files\Mozilla Firefox\omni.ja" -appomni "C:\Program Files\Mozilla Firefox\browser\omni.ja" -appdir "C:\Program Files\Mozilla Firefox\browser" - 3524 "\\.\pipe\gecko-crash-server-pipe.3524" 1848 tab

C:\Program Files\Mozilla Firefox\firefox.exe

firefox.exe

User:

admin

Company:

Mozilla Corporation

Integrity Level:

LOW

Description:

Firefox

Exit code:

Version:

67.0.4

Modules

Images
c:\program files\mozilla firefox\firefox.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\mozilla firefox\mozglue.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\dbghelp.dll

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Total events

1 013

Read events

1 010

Write events

Delete events

Modification events


(PID) Process:	(3524) firefox.exe	Key:	HKEY_CURRENT_USER\Software\Mozilla\Firefox\Launcher
Operation:	write	Name:	C:\Program Files\Mozilla Firefox\firefox.exe\|Browser
Value: 0000000000000000
(PID) Process:	(3524) firefox.exe	Key:	HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
Operation:	write	Name:	ProxyEnable
Value: 0
(PID) Process:	(3524) firefox.exe	Key:	HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections
Operation:	write	Name:	SavedLegacySettings
Value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Executable files

Suspicious files

110

Text files

Unknown types

Dropped files

PID	Process	Filename		Type
3524	firefox.exe	C:\Users\admin\AppData\Local\Mozilla\Firefox\Profiles\qldyz51w.default\startupCache\scriptCache-current.bin		—
		MD5:—	SHA256:—
3524	firefox.exe	C:\Users\admin\AppData\Roaming\Mozilla\Firefox\Profiles\qldyz51w.default\pluginreg.dat.tmp		—
		MD5:—	SHA256:—
3524	firefox.exe	C:\Users\admin\AppData\Roaming\Mozilla\Firefox\Profiles\qldyz51w.default\prefs-1.js		—
		MD5:—	SHA256:—
3524	firefox.exe	C:\Users\admin\AppData\Roaming\Mozilla\Firefox\Profiles\qldyz51w.default\sessionCheckpoints.json.tmp		—
		MD5:—	SHA256:—
3524	firefox.exe	C:\Users\admin\AppData\Roaming\Mozilla\Firefox\Profiles\qldyz51w.default\storage\permanent\chrome\idb\1657114595AmcateirvtiSty.sqlite-shm		—
		MD5:—	SHA256:—
3524	firefox.exe	C:\Users\admin\AppData\Roaming\Mozilla\Firefox\Profiles\qldyz51w.default\search.json.mozlz4.tmp		—
		MD5:—	SHA256:—
3524	firefox.exe	C:\Users\admin\AppData\Local\Mozilla\Firefox\Profiles\qldyz51w.default\safebrowsing-updating\allow-flashallow-digest256.pset		—
		MD5:—	SHA256:—
3524	firefox.exe	C:\Users\admin\AppData\Local\Mozilla\Firefox\Profiles\qldyz51w.default\safebrowsing-updating\allow-flashallow-digest256.sbstore		—
		MD5:—	SHA256:—
3524	firefox.exe	C:\Users\admin\AppData\Local\Mozilla\Firefox\Profiles\qldyz51w.default\safebrowsing-updating\base-track-digest256.pset		—
		MD5:—	SHA256:—
3524	firefox.exe	C:\Users\admin\AppData\Local\Mozilla\Firefox\Profiles\qldyz51w.default\safebrowsing-updating\base-track-digest256.sbstore		—
		MD5:—	SHA256:—

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
3524	firefox.exe	GET	301	2.16.186.27:80	http://shell.windows.com/fileassoc/fileassoc.asp?ext=xxx	unknown	—	—	whitelisted
3524	firefox.exe	POST	200	93.184.220.29:80	http://ocsp.digicert.com/	US	der	471 b	whitelisted
3524	firefox.exe	POST	200	216.58.206.3:80	http://ocsp.pki.goog/GTSGIAG3	US	der	471 b	whitelisted
3524	firefox.exe	POST	200	104.18.25.243:80	http://ocsp.msocsp.com/	US	der	1.79 Kb	whitelisted
3524	firefox.exe	POST	200	93.184.220.29:80	http://ocsp.digicert.com/	US	der	471 b	whitelisted
3524	firefox.exe	POST	200	216.58.206.3:80	http://ocsp.pki.goog/GTSGIAG3	US	der	471 b	whitelisted
3524	firefox.exe	POST	200	216.58.206.3:80	http://ocsp.pki.goog/GTSGIAG3	US	der	471 b	whitelisted
3524	firefox.exe	POST	200	93.184.220.29:80	http://ocsp.digicert.com/	US	der	471 b	whitelisted
3524	firefox.exe	POST	200	93.184.220.29:80	http://ocsp.digicert.com/	US	der	471 b	whitelisted
3524	firefox.exe	GET	200	2.16.186.50:80	http://detectportal.firefox.com/success.txt	unknown	text	8 b	whitelisted

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

Connections

PID	Process	IP	Domain	ASN	CN	Reputation
3524	firefox.exe	2.16.186.27:80	shell.windows.com	Akamai International B.V.	—	whitelisted
3524	firefox.exe	2.16.186.50:80	detectportal.firefox.com	Akamai International B.V.	—	whitelisted
3524	firefox.exe	52.210.139.31:443	location.services.mozilla.com	Amazon.com, Inc.	IE	malicious
3524	firefox.exe	93.184.220.29:80	ocsp.digicert.com	MCI Communications Services, Inc. d/b/a Verizon Business	US	whitelisted
3524	firefox.exe	54.230.184.137:443	snippets.cdn.mozilla.net	Amazon.com, Inc.	US	unknown
3524	firefox.exe	54.190.222.97:443	search.services.mozilla.com	Amazon.com, Inc.	US	malicious
3524	firefox.exe	204.79.197.200:443	www.bing.com	Microsoft Corporation	US	whitelisted
3524	firefox.exe	216.58.206.10:443	safebrowsing.googleapis.com	Google Inc.	US	whitelisted
3524	firefox.exe	216.58.206.3:80	ocsp.pki.goog	Google Inc.	US	whitelisted
3524	firefox.exe	20.190.137.96:443	login.microsoftonline.com	Microsoft Corporation	US	suspicious

DNS requests

Domain	IP	Reputation
shell.windows.com	2.16.186.27 2.16.186.24	whitelisted
detectportal.firefox.com	2.16.186.50 2.16.186.112	whitelisted
a1726.g2.akamai.net	2.16.186.24 2.16.186.27	whitelisted
a1089.dscd.akamai.net	2.16.186.112 2.16.186.50	whitelisted
location.services.mozilla.com	52.210.139.31 108.128.247.43 52.50.56.62	whitelisted
locprod1-elb-eu-west-1.prod.mozaws.net	52.50.56.62 108.128.247.43 52.210.139.31	whitelisted
push.services.mozilla.com	35.166.221.32	whitelisted
autopush.prod.mozaws.net	35.166.221.32	whitelisted
ocsp.digicert.com	93.184.220.29	whitelisted
tiles.services.mozilla.com	52.42.232.148 34.210.151.118 54.186.90.148 34.208.138.0 34.209.86.85 52.43.91.152 54.186.163.246 52.35.96.157	whitelisted

Threats

No threats detected

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No debug info

General Info

http://shell.windows.com/fileassoc/fileassoc.asp?ext=xxx

06D203CB5EF9697933E25A273E676B75

41D42653D0AFD47CD488DABCBD1D68516504C264

DEA7707CD47D242776DCB482FB5D48E32C317D1E63595EF16FA7D35AEB954787

3:N1KNNWdEDmWNGoEWNGjBYdf:CYwZX

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

SUSPICIOUS

Executable content was dropped or overwritten

INFO

Reads CPU info

Application launched itself

Dropped object may contain Bitcoin addresses

Creates files in the user directory

Malware configuration

Static information

Video and screenshots

Processes

Behavior graph

Specs description

Process information

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