File name:

SteamSetup.exe

Full analysis: https://app.any.run/tasks/ca3c0cbd-73d8-4268-b7a0-78e8750dafe5
Verdict: Malicious activity
Analysis date: October 16, 2020, 08:13:50
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, Nullsoft Installer self-extracting archive
MD5:

81448C2E730B50B597BBD5E43007CE6A

SHA1:

4B1B85EC2499A4CE07C89609B256923A4FC479E5

SHA256:

3BC6942FE09F10ED3447BCCDCF4A70ED369366FEF6B2C7F43B541F1A3C5D1C51

SSDEEP:

24576:QDliBd5TyliR0gWwOvTCU1z3zk51iq449nkU0/1COmcrOqpXzzE2YeshfLKB7:QD8tylwXoTCWi1iq1nkU09lRENhJLKB7

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

    • Loads dropped or rewritten executable

      • SteamSetup.exe (PID: 3912)

    • Application was dropped or rewritten from another process

      • ns7191.tmp (PID: 2868)
      • steamservice.exe (PID: 332)
      • steam.exe (PID: 3216)

    • Changes the autorun value in the registry

      • SteamSetup.exe (PID: 3912)

  • SUSPICIOUS

    • Executable content was dropped or overwritten

      • SteamSetup.exe (PID: 3912)
      • steamservice.exe (PID: 332)

    • Starts application with an unusual extension

      • SteamSetup.exe (PID: 3912)

    • Modifies the open verb of a shell class

      • steamservice.exe (PID: 332)

    • Creates a software uninstall entry

      • SteamSetup.exe (PID: 3912)

    • Creates files in the program directory

      • SteamSetup.exe (PID: 3912)
      • steam.exe (PID: 3216)

  • INFO

    • Manual execution by user

      • steam.exe (PID: 3216)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.

TRiD

.exe | Win32 Executable MS Visual C++ (generic) (42.2)
.exe | Win64 Executable (generic) (37.3)
.dll | Win32 Dynamic Link Library (generic) (8.8)
.exe | Win32 Executable (generic) (6)
.exe | Generic Win/DOS Executable (2.7)

EXIF

EXE

MachineType: Intel 386 or later, and compatibles
TimeStamp: 2016:07:25 02:55:51+02:00
PEType: PE32
LinkerVersion: 6
CodeSize: 25088
InitializedDataSize: 141824
UninitializedDataSize: 2048
EntryPoint: 0x33b6
OSVersion: 4
ImageVersion: 6
SubsystemVersion: 4
Subsystem: Windows GUI
FileVersionNumber: 2.10.91.91
ProductVersionNumber: 2.10.91.91
FileFlagsMask: 0x0000
FileFlags: (none)
FileOS: Win32
ObjectFileType: Executable application
FileSubtype: -
LanguageCode: Bulgarian
CharacterSet: Windows, Cyrillic
FileDescription: Steam
FileVersion: 2.10.91.91
LegalCopyright: © Valve Corporation
ProductName: Steam

Summary

Architecture: IMAGE_FILE_MACHINE_I386
Subsystem: IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date: 25-Jul-2016 00:55:51
Detected languages:
  • Bulgarian - Bulgaria
  • Chinese - PRC
  • Chinese - Taiwan
  • Czech - Czech Republic
  • Danish - Denmark
  • Dutch - Netherlands
  • English - United States
  • Finnish - Finland
  • French - France
  • German - Germany
  • Greek - Greece
  • Hungarian - Hungary
  • Italian - Italy
  • Japanese - Japan
  • Korean - Korea
  • Norwegian - Norway (Bokmal)
  • Polish - Poland
  • Portuguese - Brazil
  • Portuguese - Portugal
  • Romanian - Romania
  • Russian - Russia
  • Spanish - Spain (Traditional sort)
  • Swedish - Sweden
  • Thai - Thailand
  • Turkish - Turkey
  • Ukrainian - Ukraine
FileDescription: Steam
FileVersion: 2.10.91.91
LegalCopyright: © Valve Corporation
ProductName: Steam

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: 0x000000C8

PE Headers

Signature: PE
Machine: IMAGE_FILE_MACHINE_I386
Number of sections: 5
Time date stamp: 25-Jul-2016 00:55:51
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
.text
0x00001000
0x0000615D
0x00006200
IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
6.45023
.rdata
0x00008000
0x000013A4
0x00001400
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
5.163
.data
0x0000A000
0x00020338
0x00000600
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
3.9824
.ndata
0x0002B000
0x00036000
0x00000000
IMAGE_SCN_CNT_UNINITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
0
.rsrc
0x00061000
0x00012868
0x00012A00
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
6.2422

Resources

Title
Entropy
Size
Codepage
Language
Type
1
5.28717
1069
UNKNOWN
English - United States
RT_MANIFEST
2
5.48879
9640
UNKNOWN
English - United States
RT_ICON
3
4.72962
7336
UNKNOWN
English - United States
RT_ICON
4
5.942
4264
UNKNOWN
English - United States
RT_ICON
5
4.91233
3240
UNKNOWN
English - United States
RT_ICON
6
4.19177
1384
UNKNOWN
English - United States
RT_ICON
7
5.69139
1128
UNKNOWN
English - United States
RT_ICON
8
5.71619
872
UNKNOWN
English - United States
RT_ICON
9
2.35861
176
UNKNOWN
English - United States
RT_ICON
103
2.77822
132
UNKNOWN
English - United States
RT_GROUP_ICON

Imports

ADVAPI32.dll
COMCTL32.dll
GDI32.dll
KERNEL32.dll
SHELL32.dll
USER32.dll
ole32.dll
No data.
screenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
44
Monitored processes
5
Malicious processes
2
Suspicious processes
2

Behavior graph

Click at the process to see the details
drop and start start steamsetup.exe ns7191.tmp no specs steamservice.exe steam.exe steamsetup.exe no specs

Process information

PID
CMD
Path
Indicators
Parent process
332"C:\Program Files\Steam\bin\steamservice.exe" /InstallC:\Program Files\Steam\bin\steamservice.exe
ns7191.tmp
User:
admin
Company:
Valve Corporation
Integrity Level:
HIGH
Description:
Steam Client Service
Exit code:
0
Version:
04.52.21.91
Modules
Images
c:\program files\steam\bin\steamservice.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\shlwapi.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
2632"C:\Users\admin\AppData\Local\Temp\SteamSetup.exe" C:\Users\admin\AppData\Local\Temp\SteamSetup.exe—explorer.exe
User:
admin
Integrity Level:
MEDIUM
Description:
Steam
Exit code:
0
Version:
2.10.91.91
2868"C:\Users\admin\AppData\Local\Temp\nsq4214.tmp\ns7191.tmp" "C:\Program Files\Steam\bin\steamservice.exe" /InstallC:\Users\admin\AppData\Local\Temp\nsq4214.tmp\ns7191.tmp—SteamSetup.exe
User:
admin
Integrity Level:
HIGH
Exit code:
0
Modules
Images
c:\users\admin\appdata\local\temp\nsq4214.tmp\ns7191.tmp
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\advapi32.dll
3216"C:\Program Files\Steam\steam.exe" C:\Program Files\Steam\steam.exe
explorer.exe
User:
admin
Company:
Valve Corporation
Integrity Level:
MEDIUM
Description:
Steam Client Bootstrapper
Exit code:
0
Version:
04.52.21.91
Modules
Images
c:\program files\steam\steam.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\winsxs\x86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.17514_none_41e6975e2bd6f2b2\comctl32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\user32.dll
3912"C:\Users\admin\AppData\Local\Temp\SteamSetup.exe" C:\Users\admin\AppData\Local\Temp\SteamSetup.exe
explorer.exe
User:
admin
Integrity Level:
HIGH
Description:
Steam
Exit code:
0
Version:
2.10.91.91
Modules
Images
c:\users\admin\appdata\local\temp\steamsetup.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
Total events
404
Read events
373
Write events
31
Delete events
0

Modification events

(PID) Process:(332) steamservice.exeKey:HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\eventlog\Application\Steam Client Service
Operation:writeName:EventMessageFile
Value:
C:\Program Files\Steam\bin\steamservice.exe
(PID) Process:(332) steamservice.exeKey:HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\eventlog\Application\Steam Client Service
Operation:writeName:TypesSupported
Value:
7
(PID) Process:(3912) SteamSetup.exeKey:HKEY_CURRENT_USER\Software\Valve\Steam
Operation:writeName:Language
Value:
english
(PID) Process:(3912) SteamSetup.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Valve\Steam
Operation:writeName:Language
Value:
english
(PID) Process:(3912) SteamSetup.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
Operation:writeName:Steam
Value:
"C:\Program Files\Steam\steam.exe" -silent
(PID) Process:(3912) SteamSetup.exeKey:HKEY_CURRENT_USER\Software\Valve\Steam
Operation:writeName:SteamInstaller
Value:
SteamSetup.exe
(PID) Process:(332) steamservice.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Valve\Steam
Operation:writeName:InstallPath
Value:
C:\Program Files\Steam
(PID) Process:(332) steamservice.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Classes\steam
Operation:writeName:(default)
Value:
URL:steam protocol
(PID) Process:(332) steamservice.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Classes\steam
Operation:writeName:URL Protocol
Value:
(PID) Process:(332) steamservice.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Classes\steam\DefaultIcon
Operation:writeName:(default)
Value:
steam.exe
Executable files
10
Suspicious files
1
Text files
31
Unknown types
2

Dropped files

PID
Process
Filename
Type
3912SteamSetup.exeC:\Users\admin\AppData\Local\Temp\nsq4214.tmp\nsProcess.dllexecutable
MD5:F0438A894F3A7E01A4AAE8D1B5DD0289
SHA256:30C6C3DD3CC7FCEA6E6081CE821ADC7B2888542DAE30BF00E881C0A105EB4D11
3912SteamSetup.exeC:\Users\admin\AppData\Local\Temp\nsq4214.tmp\nsDialogs.dllexecutable
MD5:0D45588070CF728359055F776AF16EC4
SHA256:067C77D51DF034B4A614F83803140FBF4CD2F8684B88EA8C8ACDF163EDAD085A
3912SteamSetup.exeC:\Users\admin\AppData\Local\Temp\nsq4214.tmp\modern-header.bmpimage
MD5:DA3486D12BB4C8AEC16BD9E0D363D23F
SHA256:D93B76D51BD2214FA6E999C1BF70B4AFF5165A6542F9B9B2A92B5672601F4624
3912SteamSetup.exeC:\Program Files\Steam\public\steambootstrapper_brazilian.txttext
MD5:0FAD7D2F29C625003FF68E645593F27E
SHA256:E4149F2D2E2FE362241717E161838E6177A1CCC522E1B95746FBD7D05BB0749F
3912SteamSetup.exeC:\Program Files\Steam\Steam.exeexecutable
MD5:565D90CDC73F2CBC03D5C184C70FC524
SHA256:70BDE9E88AA386AA5139CAC0C8A78B5576F1BED9E5F719C4E620D5C0CF7D5CBF
3912SteamSetup.exeC:\Users\admin\AppData\Local\Temp\nsq4214.tmp\System.dllexecutable
MD5:A4DD044BCD94E9B3370CCF095B31F896
SHA256:2E226715419A5882E2E14278940EE8EF0AA648A3EF7AF5B3DC252674111962BC
3912SteamSetup.exeC:\Program Files\Steam\public\steambootstrapper_bulgarian.txttext
MD5:84ABAF1CA4BF7372ACDC9F89D3B7592D
SHA256:8DD4D81CB374750DE3D3DF6FFD0CC238EC5D1E3946DFEF4B4C8380BDD832D0FD
3912SteamSetup.exeC:\Program Files\Steam\public\steambootstrapper_czech.txttext
MD5:B02DDD5E3B43E43EE9E51E13968B7A21
SHA256:81A445A3CEB495564829CC7B0280FA993974B33476B85EDCDF87F738CA82705B
3912SteamSetup.exeC:\Program Files\Steam\public\steambootstrapper_german.txttext
MD5:825465DF8BD77C7E0AEB03736D1096C2
SHA256:6925960062DCE683A30621506B4DA178054DF17144FB18FFF387230D561C46D1
3912SteamSetup.exeC:\Program Files\Steam\public\steambootstrapper_finnish.txttext
MD5:537FD7E53FD7C2C0BB5A2B26A0BF8867
SHA256:FAE3118F870C1ADB564F641FEE63CA1334A0F65213B16201511B343BBDAAC544
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
16
TCP/UDP connections
8
DNS requests
3
Threats
1

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
3216
steam.exe
GET
302
155.133.250.75:80
http://client-download.steampowered.com/client/tenfoot_dicts_all.zip.33245b7d523f68418283e93b0572508fa127ee8f
PE
—
—
whitelisted
3216
steam.exe
GET
302
155.133.250.75:80
http://client-download.steampowered.com/client/tenfoot_sounds_all.zip.vz.ffef2b2fc386819a842ea79484b966a937c2ca7e_1209792
PE
—
—
whitelisted
3216
steam.exe
GET
—
2.16.186.64:80
http://media4.steampowered.com/client/tenfoot_misc_all.zip.1ca83d76835b4613170f5cead778b176b11f2b0c
unknown
—
—
whitelisted
3216
steam.exe
GET
302
155.133.250.75:80
http://client-download.steampowered.com/client/tenfoot_all.zip.vz.ecf24728851242648e69a680d4c17561b55d9c42_2267308
PE
—
—
whitelisted
3216
steam.exe
GET
—
2.16.186.64:80
http://media4.steampowered.com/client/tenfoot_dicts_all.zip.33245b7d523f68418283e93b0572508fa127ee8f
unknown
—
—
whitelisted
3216
steam.exe
GET
302
155.133.250.75:80
http://client-download.steampowered.com/client/resources_hidpi_all.zip.vz.66e6d0c4758df08e7a52aeca5d75f7cf2d243268_56612
PE
—
—
whitelisted
3216
steam.exe
GET
302
155.133.250.75:80
http://client-download.steampowered.com/client/strings_en_all.zip.9b75f7e790d727aef865ca7c4f4091450804b825
PE
—
—
whitelisted
3216
steam.exe
GET
302
155.133.250.75:80
http://client-download.steampowered.com/client/public_all.zip.vz.dd95dafb59aea89a5a003ebf1c5b33be6f8e2f9b_3972339
PE
—
—
whitelisted
3216
steam.exe
GET
302
155.133.250.75:80
http://client-download.steampowered.com/client/bins_webhelpers_win32_win7.zip.vz.cc734e3ea4a13ff779dc5863c91e4a86219b59a3_1351709
PE
—
—
whitelisted
3216
steam.exe
GET
302
155.133.250.75:80
http://client-download.steampowered.com/client/bins_misc_win32.zip.vz.260058a1809322c0f7ddfdc40abb99f474b32e01_14947585
PE
—
—
whitelisted
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID
Process
IP
Domain
ASN
CN
Reputation
3216
steam.exe
155.133.250.75:80
client-download.steampowered.com
—
PE
suspicious
3216
steam.exe
2.16.186.64:80
media4.steampowered.com
Akamai International B.V.
—
whitelisted
—
—
95.101.82.33:80
media.steampowered.com
Akamai International B.V.
—
unknown

DNS requests

Domain
IP
Reputation
client-download.steampowered.com
  • 155.133.250.75
  • 155.133.250.107
  • 155.133.250.76
  • 155.133.250.108
whitelisted
media4.steampowered.com
  • 2.16.186.64
  • 2.16.186.59
whitelisted
media.steampowered.com
  • 95.101.82.33
  • 95.101.82.41
whitelisted

Threats

PID
Process
Class
Message
3216
steam.exe
Potential Corporate Privacy Violation
ET USER_AGENTS Steam HTTP Client User-Agent
No debug info
Interactive malware hunting service ANY.RUN
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Reports
SteamSetup.exe