Malware analysis Firefox Installer.exe Malicious activity

Add for printing

File name:	Firefox Installer.exe
Full analysis:	https://app.any.run/tasks/fa6b859a-b33c-4bcd-89cf-5593cc2a54f2
Verdict:	Malicious activity
Analysis date:	March 21, 2019, 12:51:21
OS:	Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Indicators:
MIME:	application/x-dosexec
File info:	PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed
MD5:	1EEECAE58D5CF0B87EA4AB2FC3498A70
SHA1:	289E7DBC056E94E34F86CBDA0C6595DF18EE2FDC
SHA256:	088B3C21BE5D0BA5CF645E7F45A4A67C1D7E70B5D21974C28E44AB51D4762E32
SSDEEP:	6144:QTAyHQDVWuU4UUU3UUUj9rOAzvuJV3SSkytH+N8NWJR3qIrzkcyyco7N:QcyHQ1U4UUU3UUU5aeANSSp+SirzkJXU

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 (73.0.3683.75)
Google Update Helper (1.3.33.23)
Java 8 Update 92 (8.0.920.14)
Java Auto Updater (2.8.92.14)
Microsoft .NET Framework 4.6.1 (4.6.01055)
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++ 2017 Redistributable (x86) - 14.15.26706 (14.15.26706.0)
Microsoft Visual C++ 2017 x86 Additional Runtime - 14.15.26706 (14.15.26706)
Microsoft Visual C++ 2017 x86 Minimum Runtime - 14.15.26706 (14.15.26706)
Mozilla Firefox 65.0.2 (x86 en-US) (65.0.2)
Notepad++ (32-bit x86) (7.5.1)
Opera 12.15 (12.15.1748)
Skype version 8.29 (8.29)
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
KB976902
LocalPack AU Package
LocalPack CA Package
LocalPack GB Package
LocalPack US Package
LocalPack ZA Package
ProfessionalEdition
UltimateEdition

Add for printing

MALICIOUS
- Loads dropped or rewritten executable
  - setup-stub.exe (PID: 3152)
  - setup-stub.exe (PID: 3912)
- Application was dropped or rewritten from another process
  - setup-stub.exe (PID: 3152)
  - setup-stub.exe (PID: 3912)
SUSPICIOUS
- Executable content was dropped or overwritten
  - Firefox Installer.exe (PID: 1524)
  - setup-stub.exe (PID: 3152)
  - setup-stub.exe (PID: 3912)
- Creates files in the program directory
  - setup-stub.exe (PID: 3912)
- Application launched itself
  - setup-stub.exe (PID: 3152)
INFO
- Changes internet zones settings
  - iexplore.exe (PID: 2668)
- Creates files in the user directory
  - iexplore.exe (PID: 2192)
- Application launched itself
  - iexplore.exe (PID: 2668)
- Reads internet explorer settings
  - iexplore.exe (PID: 2192)
- Reads Internet Cache Settings
  - iexplore.exe (PID: 2192)

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

Add for printing

No Malware configuration.

Add for printing

TRiD

.exe	\|	Win64 Executable (generic) (39.5)
.exe	\|	UPX compressed Win32 Executable (38.7)
.dll	\|	Win32 Dynamic Link Library (generic) (9.4)
.exe	\|	Win32 Executable (generic) (6.4)
.exe	\|	Generic Win/DOS Executable (2.8)

EXIF

EXE

MachineType:	Intel 386 or later, and compatibles
TimeStamp:	2018:02:12 23:33:59+01:00
PEType:	PE32
LinkerVersion:	6
CodeSize:	57344
InitializedDataSize:	65536
UninitializedDataSize:	147456
EntryPoint:	0x32d00
OSVersion:	4
ImageVersion:	-
SubsystemVersion:	4
Subsystem:	Windows GUI
FileVersionNumber:	18.1.0.0
ProductVersionNumber:	18.1.0.0
FileFlagsMask:	0x003f
FileFlags:	(none)
FileOS:	Windows NT 32-bit
ObjectFileType:	Executable application
FileSubtype:	-
LanguageCode:	English (U.S.)
CharacterSet:	Unicode
CompanyName:	Mozilla
FileDescription:	Firefox
FileVersion:	18.01
InternalName:	7zS.sfx
LegalCopyright:	Mozilla
OriginalFileName:	7zS.sfx.exe
ProductName:	Firefox
ProductVersion:	18.01

Summary

Architecture:	IMAGE_FILE_MACHINE_I386
Subsystem:	IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date:	12-Feb-2018 22:33:59
Detected languages:	English - United States
CompanyName:	Mozilla
FileDescription:	Firefox
FileVersion:	18.01
InternalName:	7zS.sfx
LegalCopyright:	Mozilla
OriginalFilename:	7zS.sfx.exe
ProductName:	Firefox
ProductVersion:	18.01

DOS Header

Magic number:	MZ
Bytes on last page of file:	0x0090
Pages in file:	0x0003
Relocations:	0x0000
Size of header:	0x0004
Min extra paragraphs:	0x0000
Max extra paragraphs:	0xFFFF
Initial SS value:	0x0000
Initial SP value:	0x00B8
Checksum:	0x0000
Initial IP value:	0x0000
Initial CS value:	0x0000
Overlay number:	0x0000
OEM identifier:	0x0000
OEM information:	0x0000
Address of NE header:	0x000000F0

PE Headers

Signature:	PE
Machine:	IMAGE_FILE_MACHINE_I386
Number of sections:	3
Time date stamp:	12-Feb-2018 22:33:59
Pointer to Symbol Table:	0x00000000
Number of symbols:	0
Size of Optional Header:	0x00E0
Characteristics:	IMAGE_FILE_32BIT_MACHINE IMAGE_FILE_EXECUTABLE_IMAGE IMAGE_FILE_LINE_NUMS_STRIPPED IMAGE_FILE_LOCAL_SYMS_STRIPPED IMAGE_FILE_RELOCS_STRIPPED

Sections

Name	Virtual Address	Virtual Size	Raw Size	Charateristics	Entropy
UPX0	0x00001000	0x00024000	0x00000000	IMAGE_SCN_CNT_UNINITIALIZED_DATA, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE	0
UPX1	0x00025000	0x0000E000	0x0000E000	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE	7.89256
.rsrc	0x00033000	0x00010000	0x0000F200	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE	7.39763

Resources

Title	Entropy	Size	Codepage	Language	Type
1	5.3883	1365	UNKNOWN	English - United States	RT_MANIFEST
2	5.28933	5160	UNKNOWN	English - United States	RT_ICON
3	5.05971	11560	UNKNOWN	English - United States	RT_ICON
4	7.98148	40620	UNKNOWN	English - United States	RT_ICON
5	6.396	136	UNKNOWN	English - United States	RT_STRING
97	6.69582	184	UNKNOWN	English - United States	RT_DIALOG
188	5.99339	84	UNKNOWN	English - United States	RT_STRING
207	5.37823	52	UNKNOWN	English - United States	RT_STRING

Imports


KERNEL32.DLL
MSVCRT.dll

No data.

Add for printing

All screenshots are available in the full report

Add for printing

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

1524

"C:\Users\admin\AppData\Local\Temp\Firefox Installer.exe"

C:\Users\admin\AppData\Local\Temp\Firefox Installer.exe

explorer.exe

User:

admin

Company:

Mozilla

Integrity Level:

MEDIUM

Description:

Firefox

Exit code:

Version:

18.01

Modules

Images
c:\users\admin\appdata\local\temp\firefox installer.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\uxtheme.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll

2192

"C:\Program Files\Internet Explorer\iexplore.exe" SCODEF:2668 CREDAT:71937

C:\Program Files\Internet Explorer\iexplore.exe

—

iexplore.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

LOW

Description:

Internet Explorer

Exit code:

Version:

8.00.7600.16385 (win7_rtm.090713-1255)

Modules

Images
c:\program files\internet explorer\iexplore.exe
c:\systemroot\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\user32.dll
c:\windows\system32\gdi32.dll

2668

"C:\Program Files\Internet Explorer\iexplore.exe"

C:\Program Files\Internet Explorer\iexplore.exe

explorer.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Internet Explorer

Exit code:

Version:

8.00.7600.16385 (win7_rtm.090713-1255)

Modules

Images
c:\program files\internet explorer\iexplore.exe
c:\systemroot\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\user32.dll
c:\windows\system32\gdi32.dll

3152

.\setup-stub.exe

C:\Users\admin\AppData\Local\Temp\7zS4F57AF9F\setup-stub.exe

Firefox Installer.exe

User:

admin

Company:

Mozilla Corporation

Integrity Level:

MEDIUM

Description:

Firefox Installer

Exit code:

Version:

60.0.2

Modules

Images
c:\users\admin\appdata\local\temp\7zs4f57af9f\setup-stub.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\shell32.dll

3912

"C:\Users\admin\AppData\Local\Temp\7zS4F57AF9F\setup-stub.exe" /UAC:4013C /NCRC

C:\Users\admin\AppData\Local\Temp\7zS4F57AF9F\setup-stub.exe

setup-stub.exe

User:

admin

Company:

Mozilla Corporation

Integrity Level:

HIGH

Description:

Firefox Installer

Exit code:

Version:

60.0.2

Modules

Images
c:\users\admin\appdata\local\temp\7zs4f57af9f\setup-stub.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\usp10.dll
c:\windows\system32\shlwapi.dll

Add for printing

Total events

1 395

Read events

1 318

Write events

Delete events

Modification events


(PID) Process:	(3912) setup-stub.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla
Operation:	write	Name:	FirefoxInstallerTest
Value: Write Test
(PID) Process:	(3912) setup-stub.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla
Operation:	delete value	Name:	FirefoxInstallerTest
Value: Write Test
(PID) Process:	(3912) setup-stub.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\setup-stub_RASAPI32
Operation:	write	Name:	EnableFileTracing
Value: 0
(PID) Process:	(3912) setup-stub.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\setup-stub_RASAPI32
Operation:	write	Name:	EnableConsoleTracing
Value: 0
(PID) Process:	(3912) setup-stub.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\setup-stub_RASAPI32
Operation:	write	Name:	FileTracingMask
Value: 4294901760
(PID) Process:	(3912) setup-stub.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\setup-stub_RASAPI32
Operation:	write	Name:	ConsoleTracingMask
Value: 4294901760
(PID) Process:	(3912) setup-stub.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\setup-stub_RASAPI32
Operation:	write	Name:	MaxFileSize
Value: 1048576
(PID) Process:	(3912) setup-stub.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\setup-stub_RASAPI32
Operation:	write	Name:	FileDirectory
Value: %windir%\tracing
(PID) Process:	(3912) setup-stub.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\setup-stub_RASMANCS
Operation:	write	Name:	EnableFileTracing
Value: 0
(PID) Process:	(3912) setup-stub.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\setup-stub_RASMANCS
Operation:	write	Name:	EnableConsoleTracing
Value: 0

Add for printing

Executable files

Suspicious files

Text files

Unknown types

Dropped files

PID	Process	Filename		Type
2668	iexplore.exe	C:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\H6QNMHE9\favicon[1].ico		—
		MD5:—	SHA256:—
2668	iexplore.exe	C:\Users\admin\AppData\LocalLow\Microsoft\Internet Explorer\Services\search_{0633EE93-D776-472f-A0FF-E1416B8B2E3A}.ico		—
		MD5:—	SHA256:—
1524	Firefox Installer.exe	C:\Users\admin\AppData\Local\Temp\7zS4F57AF9F\setup-stub.exe		executable
		MD5:—	SHA256:—
1524	Firefox Installer.exe	C:\Users\admin\AppData\Local\Temp\7zS4F57AF9F\postSigningData		text
		MD5:—	SHA256:—
3912	setup-stub.exe	C:\Users\admin\AppData\Local\Temp\nsj90BE.tmp\UAC.dll		executable
		MD5:113C5F02686D865BC9E8332350274FD1	SHA256:0D21041A1B5CD9F9968FC1D457C78A802C9C5A23F375327E833501B65BCD095D
3152	setup-stub.exe	C:\Users\admin\AppData\Local\Temp\nsc8B21.tmp\System.dll		executable
		MD5:17ED1C86BD67E78ADE4712BE48A7D2BD	SHA256:BD046E6497B304E4EA4AB102CAB2B1F94CE09BDE0EEBBA4C59942A732679E4EB
2192	iexplore.exe	C:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Low\desktop.ini		ini
		MD5:4A3DEB274BB5F0212C2419D3D8D08612	SHA256:2842973D15A14323E08598BE1DFB87E54BF88A76BE8C7BC94C56B079446EDF38
3912	setup-stub.exe	C:\Users\admin\AppData\Local\Temp\nsj90BE.tmp\bgstub.jpg		image
		MD5:49DE6374F83191FDE6836418FC489837	SHA256:04009456682876F46ABFEC45F629F1D85DD518F05A84D8D4700B56F2060FD071
3152	setup-stub.exe	C:\Users\admin\AppData\Local\Temp\nsc8B21.tmp\UAC.dll		executable
		MD5:113C5F02686D865BC9E8332350274FD1	SHA256:0D21041A1B5CD9F9968FC1D457C78A802C9C5A23F375327E833501B65BCD095D
3912	setup-stub.exe	C:\Users\admin\AppData\Local\Temp\nsj90BE.tmp\bgstub_2x.jpg		image
		MD5:4733789DB23E483B5358A634F079D3E3	SHA256:C52E085D3827FEF5E694E615488ADD1AD04EC34B1F161918C46571B50EF36A47

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

Add for printing

HTTP(S) requests

TCP/UDP connections

DNS requests

Threats

HTTP requests

PID	Process	Method	HTTP Code	IP	URL	CN	Type	Size	Reputation
2668	iexplore.exe	GET	200	204.79.197.200:80	http://www.bing.com/favicon.ico	US	image	237 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
2668	iexplore.exe	204.79.197.200:80	www.bing.com	Microsoft Corporation	US	whitelisted
3912	setup-stub.exe	63.245.208.218:443	product-details.mozilla.org	Mozilla Corporation	US	unknown

DNS requests

Domain	IP	Reputation
product-details.mozilla.org	63.245.208.218	shared
www.bing.com	204.79.197.200 13.107.21.200	whitelisted

Threats

No threats detected

Add for printing

No debug info

General Info

Firefox Installer.exe

1EEECAE58D5CF0B87EA4AB2FC3498A70

289E7DBC056E94E34F86CBDA0C6595DF18EE2FDC

088B3C21BE5D0BA5CF645E7F45A4A67C1D7E70B5D21974C28E44AB51D4762E32

6144:QTAyHQDVWuU4UUU3UUUj9rOAzvuJV3SSkytH+N8NWJR3qIrzkcyyco7N:QcyHQ1U4UUU3UUU5aeANSSp+SirzkJXU

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

Loads dropped or rewritten executable

Application was dropped or rewritten from another process

SUSPICIOUS

Executable content was dropped or overwritten

Creates files in the program directory

Application launched itself

INFO

Changes internet zones settings

Creates files in the user directory

Application launched itself

Reads internet explorer settings

Reads Internet Cache Settings

Malware configuration

Static information

TRiD

EXIF

EXE

Summary

DOS Header

PE Headers

Sections

Resources

Imports

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