File name:

Firefox Installer.exe

Full analysis: https://app.any.run/tasks/a60ee1db-d4fb-4e09-ad5d-84d837760c94
Verdict: Malicious activity
Analysis date: May 20, 2022, 16:59:27
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:

CECF1C2ECCF469BEC800DB648C31C561

SHA1:

6C886FDBB7311D7F6774A4C9D06A0FEBCCEB72BC

SHA256:

6C3A3476C6421E21F5C55E3E9C7F7EDA27563E42B27C21365D3BDBE1F8A2D764

SSDEEP:

6144:/aVWdyzOxeA1DfdwX3MmIOW/dh1kI+i4dtHUYWc0ACwmXnbmbRBTiQ:/MROxdDfOnMmXWX17AtH1X0xv0RJiQ

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.

  • MALICIOUS

    • Drops executable file immediately after starts

      • Firefox Installer.exe (PID: 2884)
      • setup-stub.exe (PID: 3248)
      • setup-stub.exe (PID: 3872)
      • download.exe (PID: 1192)

    • Actions looks like stealing of personal data

      • setup-stub.exe (PID: 3872)
      • download.exe (PID: 1192)

    • Loads dropped or rewritten executable

      • setup-stub.exe (PID: 3872)
      • setup-stub.exe (PID: 3248)

    • Steals credentials from Web Browsers

      • setup-stub.exe (PID: 3872)

    • Application was dropped or rewritten from another process

      • setup-stub.exe (PID: 3248)
      • setup-stub.exe (PID: 3872)
      • setup.exe (PID: 3692)

    • Changes settings of System certificates

      • setup-stub.exe (PID: 3872)

  • SUSPICIOUS

    • Checks supported languages

      • setup-stub.exe (PID: 3248)
      • setup-stub.exe (PID: 3872)
      • Firefox Installer.exe (PID: 2884)
      • download.exe (PID: 1192)
      • setup.exe (PID: 3692)

    • Reads the computer name

      • setup-stub.exe (PID: 3248)
      • setup-stub.exe (PID: 3872)
      • setup.exe (PID: 3692)

    • Executable content was dropped or overwritten

      • Firefox Installer.exe (PID: 2884)
      • setup-stub.exe (PID: 3248)
      • setup-stub.exe (PID: 3872)
      • download.exe (PID: 1192)

    • Drops a file with a compile date too recent

      • Firefox Installer.exe (PID: 2884)
      • setup-stub.exe (PID: 3248)
      • setup-stub.exe (PID: 3872)
      • download.exe (PID: 1192)

    • Creates files in the program directory

      • setup-stub.exe (PID: 3872)
      • setup.exe (PID: 3692)

    • Application launched itself

      • setup-stub.exe (PID: 3248)

    • Creates a directory in Program Files

      • setup-stub.exe (PID: 3872)
      • setup.exe (PID: 3692)

    • Reads Microsoft Outlook installation path

      • setup-stub.exe (PID: 3872)

    • Adds / modifies Windows certificates

      • setup-stub.exe (PID: 3872)

    • Reads internet explorer settings

      • setup-stub.exe (PID: 3872)

  • INFO

    • Checks Windows Trust Settings

      • setup-stub.exe (PID: 3872)

    • Reads settings of System Certificates

      • setup-stub.exe (PID: 3872)

    • Dropped object may contain Bitcoin addresses

      • download.exe (PID: 1192)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.

TRiD

.exe | UPX compressed Win32 Executable (64.2)
.dll | Win32 Dynamic Link Library (generic) (15.6)
.exe | Win32 Executable (generic) (10.6)
.exe | Generic Win/DOS Executable (4.7)
.exe | DOS Executable Generic (4.7)

EXIF

EXE

ProductVersion: 18.05
ProductName: Firefox
OriginalFileName: 7zS.sfx.exe
LegalCopyright: Mozilla
InternalName: 7zS.sfx
FileVersion: 18.05
FileDescription: Firefox
CompanyName: Mozilla
CharacterSet: Unicode
LanguageCode: English (U.S.)
FileSubtype: -
ObjectFileType: Executable application
FileOS: Windows NT 32-bit
FileFlags: (none)
FileFlagsMask: 0x003f
ProductVersionNumber: 18.5.0.0
FileVersionNumber: 18.5.0.0
Subsystem: Windows GUI
SubsystemVersion: 4
ImageVersion: -
OSVersion: 4
EntryPoint: 0x34fa0
UninitializedDataSize: 147456
InitializedDataSize: 65536
CodeSize: 69632
LinkerVersion: 6
PEType: PE32
TimeStamp: 2018:08:31 00:18:33+02:00
MachineType: Intel 386 or later, and compatibles

Summary

Architecture: IMAGE_FILE_MACHINE_I386
Subsystem: IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date: 30-Aug-2018 22:18:33
Detected languages:
  • English - United States
CompanyName: Mozilla
FileDescription: Firefox
FileVersion: 18.05
InternalName: 7zS.sfx
LegalCopyright: Mozilla
OriginalFilename: 7zS.sfx.exe
ProductName: Firefox
ProductVersion: 18.05

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: 30-Aug-2018 22:18:33
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
0x00011000
0x00010200
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
7.87799
.rsrc
0x00036000
0x00010000
0x0000FC00
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
7.52725

Resources

Title
Entropy
Size
Codepage
Language
Type
1
5.38843
1365
UNKNOWN
UNKNOWN
RT_MANIFEST
2
5.52861
5160
UNKNOWN
English - United States
RT_ICON
3
5.45625
11560
UNKNOWN
English - United States
RT_ICON
4
7.98617
43467
UNKNOWN
English - United States
RT_ICON
5
6.34937
136
UNKNOWN
English - United States
RT_STRING
97
6.74142
184
UNKNOWN
English - United States
RT_DIALOG
188
6.07381
84
UNKNOWN
English - United States
RT_STRING
207
5.37823
52
UNKNOWN
English - United States
RT_STRING

Imports

KERNEL32.DLL
MSVCRT.dll
No data.
screenshotscreenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
42
Monitored processes
5
Malicious processes
5
Suspicious processes
0

Behavior graph

Click at the process to see the details
drop and start start drop and start firefox installer.exe setup-stub.exe setup-stub.exe download.exe setup.exe no specs

Process information

PID
CMD
Path
Indicators
Parent process
1192"C:\Users\admin\AppData\Local\Temp\nsa515F.tmp\download.exe" /LaunchedFromStub /INI=C:\Users\admin\AppData\Local\Temp\nsa515F.tmp\config.iniC:\Users\admin\AppData\Local\Temp\nsa515F.tmp\download.exe
setup-stub.exe
User:
admin
Company:
Mozilla
Integrity Level:
HIGH
Description:
Firefox
Exit code:
0
Version:
18.05
Modules
Images
c:\users\admin\appdata\local\temp\nsa515f.tmp\download.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\oleaut32.dll
c:\windows\system32\ole32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\user32.dll
c:\windows\system32\lpk.dll
2884"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:
0
Version:
18.05
Modules
Images
c:\users\admin\appdata\local\temp\firefox installer.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\user32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\usp10.dll
c:\windows\system32\imm32.dll
3248.\setup-stub.exeC:\Users\admin\AppData\Local\Temp\7zS44B13660\setup-stub.exe
Firefox Installer.exe
User:
admin
Company:
Mozilla Corporation
Integrity Level:
MEDIUM
Description:
Firefox Installer
Exit code:
0
Version:
88.0
Modules
Images
c:\users\admin\appdata\local\temp\7zs44b13660\setup-stub.exe
c:\windows\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
3692.\setup.exe /LaunchedFromStub /INI=C:\Users\admin\AppData\Local\Temp\nsa515F.tmp\config.iniC:\Users\admin\AppData\Local\Temp\7zS8A48F311\setup.exe—download.exe
User:
admin
Company:
Mozilla Corporation
Integrity Level:
HIGH
Description:
Firefox Installer
Exit code:
0
Version:
100.0.2
Modules
Images
c:\windows\system32\ntdll.dll
c:\windows\system32\kernelbase.dll
c:\users\admin\appdata\local\temp\7zs8a48f311\setup.exe
c:\windows\system32\kernel32.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\shell32.dll
c:\windows\system32\shlwapi.dll
3872"C:\Users\admin\AppData\Local\Temp\7zS44B13660\setup-stub.exe" /UAC:30126 /NCRCC:\Users\admin\AppData\Local\Temp\7zS44B13660\setup-stub.exe
setup-stub.exe
User:
admin
Company:
Mozilla Corporation
Integrity Level:
HIGH
Description:
Firefox Installer
Exit code:
0
Version:
88.0
Modules
Images
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\users\admin\appdata\local\temp\7zs44b13660\setup-stub.exe
c:\windows\system32\kernelbase.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\user32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\shell32.dll
Total events
7 717
Read events
7 660
Write events
55
Delete events
2

Modification events

(PID) Process:(3872) setup-stub.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla
Operation:writeName:FirefoxInstallerTest
Value:
Write Test
(PID) Process:(3872) setup-stub.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla
Operation:delete valueName:FirefoxInstallerTest
Value:
Write Test
(PID) Process:(3872) setup-stub.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\Firefox\TaskBarIDs
Operation:writeName:C:\Program Files\Mozilla Firefox
Value:
308046B0AF4A39CB
(PID) Process:(3872) setup-stub.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
Operation:writeName:ProxyEnable
Value:
0
(PID) Process:(3872) setup-stub.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections
Operation:writeName:SavedLegacySettings
Value:
460000003B010000090000000000000000000000000000000400000000000000C0E333BBEAB1D3010000000000000000000000000100000002000000C0A80164000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
(PID) Process:(3872) setup-stub.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:ProxyBypass
Value:
1
(PID) Process:(3872) setup-stub.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:IntranetName
Value:
1
(PID) Process:(3872) setup-stub.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:UNCAsIntranet
Value:
1
(PID) Process:(3872) setup-stub.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:AutoDetect
Value:
0
(PID) Process:(3872) setup-stub.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{362E934C-743B-4588-8259-D2482DB771A8}
Operation:writeName:WpadDecisionReason
Value:
1
Executable files
65
Suspicious files
16
Text files
22
Unknown types
8

Dropped files

PID
Process
Filename
Type
2884Firefox Installer.exeC:\Users\admin\AppData\Local\Temp\7zS44B13660\postSigningData —
MD5:—
SHA256:—
3872setup-stub.exeC:\Users\admin\AppData\Local\Temp\nsa515F.tmp\CityHash.dllexecutable
MD5:737379945745BB94F8A0DADCC18CAD8D
SHA256:D3D7B3D7A7941D66C7F75257BE90B12AC76F787AF42CD58F019CE0280972598A
3248setup-stub.exeC:\Users\admin\AppData\Local\Temp\nsi4CBB.tmp\UAC.dllexecutable
MD5:113C5F02686D865BC9E8332350274FD1
SHA256:0D21041A1B5CD9F9968FC1D457C78A802C9C5A23F375327E833501B65BCD095D
3872setup-stub.exeC:\Users\admin\AppData\Local\Temp\nsa515F.tmp\System.dllexecutable
MD5:17ED1C86BD67E78ADE4712BE48A7D2BD
SHA256:BD046E6497B304E4EA4AB102CAB2B1F94CE09BDE0EEBBA4C59942A732679E4EB
3872setup-stub.exeC:\Users\admin\AppData\Local\Temp\nsa515F.tmp\bgstub.jpgimage
MD5:C55F15CEEDC724D6C6E15D1DAF96B698
SHA256:4B7E441D51B790EE1C0BAFF19E4E968392A937877DFA8B84E74464F5BA7A4CF4
3248setup-stub.exeC:\Users\admin\AppData\Local\Temp\nsi4CBB.tmp\System.dllexecutable
MD5:17ED1C86BD67E78ADE4712BE48A7D2BD
SHA256:BD046E6497B304E4EA4AB102CAB2B1F94CE09BDE0EEBBA4C59942A732679E4EB
3872setup-stub.exeC:\Users\admin\AppData\Local\Temp\nsa515F.tmp\download.exe —
MD5:—
SHA256:—
3872setup-stub.exeC:\Users\admin\AppData\Local\Temp\nsa515F.tmp\WebBrowser.dllexecutable
MD5:DFE24AA39F009E9D98B20B7C9CC070B1
SHA256:8EC65A3D8AE8A290A6066773E49387FD368F5697392DFB58EAC1B63640E30444
3872setup-stub.exeC:\Users\admin\AppData\Local\Temp\nsa515F.tmp\UAC.dllexecutable
MD5:113C5F02686D865BC9E8332350274FD1
SHA256:0D21041A1B5CD9F9968FC1D457C78A802C9C5A23F375327E833501B65BCD095D
3872setup-stub.exeC:\Users\admin\AppData\Local\Temp\nsa515F.tmp\stub_common.jstext
MD5:58B8AC894C64370CFA137F5848AEB88D
SHA256:0E28AA770B0AFADE30BE85C6DC1E50344DB8F8CDD3FA01989D81A9E20A4990BD
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
3
TCP/UDP connections
8
DNS requests
6
Threats
0

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
3872
setup-stub.exe
GET
200
93.184.220.29:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAbY2QTVWENG9oovp1QifsQ%3D
US
der
471 b
whitelisted
3872
setup-stub.exe
GET
200
93.184.220.29:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTk45WiKdPUwcMf8JgMC07ACYqr2AQUt2ui6qiqhIx56rTaD5iyxZV2ufQCEAcICaBn%2B7%2F6lLcIYJITnRo%3D
US
der
471 b
whitelisted
3872
setup-stub.exe
GET
200
93.184.221.240:80
http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?a0f2a0878fd04655
US
compressed
4.70 Kb
whitelisted
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID
Process
IP
Domain
ASN
CN
Reputation
3872
setup-stub.exe
108.157.4.35:443
product-details.mozilla.org
—
US
unknown
3872
setup-stub.exe
93.184.221.240:80
ctldl.windowsupdate.com
MCI Communications Services, Inc. d/b/a Verizon Business
US
whitelisted
3872
setup-stub.exe
18.66.247.89:443
download-installer.cdn.mozilla.net
Massachusetts Institute of Technology
US
suspicious
3872
setup-stub.exe
93.184.220.29:80
ocsp.digicert.com
MCI Communications Services, Inc. d/b/a Verizon Business
US
whitelisted
3872
setup-stub.exe
35.169.226.180:443
download.mozilla.org
Amazon.com, Inc.
US
unknown

DNS requests

Domain
IP
Reputation
product-details.mozilla.org
  • 108.157.4.35
  • 108.157.4.116
  • 108.157.4.14
  • 108.157.4.83
shared
ctldl.windowsupdate.com
  • 93.184.221.240
whitelisted
download.mozilla.org
  • 35.169.226.180
  • 34.206.79.41
  • 107.22.193.141
whitelisted
ocsp.digicert.com
  • 93.184.220.29
whitelisted
download-installer.cdn.mozilla.net
  • 18.66.247.89
whitelisted

Threats

No threats detected
No debug info
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Reports
Firefox Installer.exe