File name:

Windows-KB890830-V1.34.exe

Full analysis: https://app.any.run/tasks/0b8ab3f8-76f4-441e-a3b6-57dc34f742a5
Verdict: Malicious activity
Analysis date: February 19, 2025, 16:44:14
OS: Windows 10 Professional (build: 19045, 64 bit)
Indicators:
MIME: application/vnd.microsoft.portable-executable
File info: PE32 executable (GUI) Intel 80386, for MS Windows, 3 sections
MD5:

BA830EEE565B252C0D9441B0017C11BC

SHA1:

A827A00A099CA0B9286FC147E49D2A4F95F983B6

SHA256:

038D19B8B26C685C7C7531932C7F3EC20D86569CAB7FADF4C438EC4E73D96872

SSDEEP:

98304:FCrWtUp9qva1t4+2H042i24ibO/1OTJ/TYYM0zL+MPf/ufNYCraoBU70yoTfoHLW:o12FVKOKiCCUz5x+c8h

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

    • Executing a file with an untrusted certificate

      • mrtstub.exe (PID: 6540)
      • MRT.exe (PID: 6744)
      • mrtstub.exe (PID: 6688)

  • SUSPICIOUS

    • Process drops legitimate windows executable

      • Windows-KB890830-V1.34.exe (PID: 6372)
      • mrtstub.exe (PID: 6688)

    • Executable content was dropped or overwritten

      • mrtstub.exe (PID: 6688)
      • Windows-KB890830-V1.34.exe (PID: 6372)
      • MRT.exe (PID: 6744)

    • Searches for installed software

      • MRT.exe (PID: 6744)

    • Starts a Microsoft application from unusual location

      • Windows-KB890830-V1.34.exe (PID: 6372)

  • INFO

    • Checks supported languages

      • Windows-KB890830-V1.34.exe (PID: 6372)
      • mrtstub.exe (PID: 6688)

    • The sample compiled with english language support

      • Windows-KB890830-V1.34.exe (PID: 6372)
      • MRT.exe (PID: 6744)

    • The sample compiled with arabic language support

      • mrtstub.exe (PID: 6688)
      • Windows-KB890830-V1.34.exe (PID: 6372)

    • Reads the machine GUID from the registry

      • Windows-KB890830-V1.34.exe (PID: 6372)

    • Reads the computer name

      • Windows-KB890830-V1.34.exe (PID: 6372)

    • Create files in a temporary directory

      • MRT.exe (PID: 6744)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.

TRiD

.exe | MS generic-sfx Cabinet File Unpacker (32/64bit MSCFU) (82.5)
.exe | Win32 Executable MS Visual C++ (generic) (7.3)
.exe | Win64 Executable (generic) (6.5)
.dll | Win32 Dynamic Link Library (generic) (1.5)
.exe | Win32 Executable (generic) (1)

EXIF

EXE

MachineType: Intel 386 or later, and compatibles
TimeStamp: 2005:02:24 19:44:38+00:00
ImageFileCharacteristics: No relocs, Executable, No line numbers, No symbols, 32-bit, Removable run from swap, Net run from swap
PEType: PE32
LinkerVersion: 7.1
CodeSize: 31232
InitializedDataSize: 72704
UninitializedDataSize: -
EntryPoint: 0x5972
OSVersion: 5.2
ImageVersion: 5.2
SubsystemVersion: 4
Subsystem: Windows GUI
FileVersionNumber: 6.1.22.4
ProductVersionNumber: 6.1.22.4
FileFlagsMask: 0x003f
FileFlags: (none)
FileOS: Windows NT 32-bit
ObjectFileType: Executable application
FileSubtype: -
LanguageCode: English (U.S.)
CharacterSet: Unicode
CompanyName: Microsoft Corporation
FileDescription: Self-Extracting Cabinet
FileVersion: 6.1.0022.4 (SRV03_QFE.031113-0918)
InternalName: SFXCAB.EXE
LegalCopyright: © Microsoft Corporation. All rights reserved.
OriginalFileName: SFXCAB.EXE
ProductName: Microsoft® Windows® Operating System
ProductVersion: 6.1.0022.4
No data.
screenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
132
Monitored processes
4
Malicious processes
3
Suspicious processes
1

Behavior graph

Click at the process to see the details
start windows-kb890830-v1.34.exe mrtstub.exe no specs mrtstub.exe mrt.exe

Process information

PID
CMD
Path
Indicators
Parent process
6372"C:\Users\admin\AppData\Local\Temp\Windows-KB890830-V1.34.exe" C:\Users\admin\AppData\Local\Temp\Windows-KB890830-V1.34.exe
explorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Self-Extracting Cabinet
Version:
6.1.0022.4 (SRV03_QFE.031113-0918)
Modules
Images
c:\users\admin\appdata\local\temp\windows-kb890830-v1.34.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
c:\windows\system32\wow64.dll
c:\windows\system32\wow64win.dll
c:\windows\system32\wow64cpu.dll
c:\windows\syswow64\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\apphelp.dll
c:\windows\syswow64\aclayers.dll
6540c:\0feca2bbf60626d4fed714874a790897\mrtstub.exeC:\0feca2bbf60626d4fed714874a790897\mrtstub.exe—Windows-KB890830-V1.34.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Malicious Software Removal Tool Update Stub
Exit code:
3221226540
Version:
1.34.2288.0
Modules
Images
c:\0feca2bbf60626d4fed714874a790897\mrtstub.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
6688c:\0feca2bbf60626d4fed714874a790897\mrtstub.exeC:\0feca2bbf60626d4fed714874a790897\mrtstub.exe
Windows-KB890830-V1.34.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
Description:
Malicious Software Removal Tool Update Stub
Version:
1.34.2288.0
Modules
Images
c:\0feca2bbf60626d4fed714874a790897\mrtstub.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
c:\windows\system32\wow64.dll
c:\windows\system32\wow64win.dll
c:\windows\system32\wow64cpu.dll
c:\windows\syswow64\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\apphelp.dll
c:\windows\syswow64\aclayers.dll
6744"C:\WINDOWS\system32\MRT.exe" C:\Windows\SysWOW64\MRT.exe
mrtstub.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
Description:
Microsoft Windows Malicious Software Removal Tool
Version:
1.34.2288.0
Modules
Images
c:\windows\syswow64\mrt.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
c:\windows\system32\wow64.dll
c:\windows\system32\wow64win.dll
c:\windows\system32\wow64cpu.dll
c:\windows\syswow64\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\apphelp.dll
c:\windows\syswow64\advapi32.dll
Total events
3 591
Read events
3 589
Write events
2
Delete events
0

Modification events

(PID) Process:(6744) MRT.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\RemovalTools\MRT
Operation:writeName:EULA
Value:
1
(PID) Process:(6744) MRT.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\RemovalTools\MRT
Operation:writeName:Version
Value:
52168AD3-127E-416C-B7F6-068D1254C3A4
Executable files
4
Suspicious files
0
Text files
0
Unknown types
0

Dropped files

PID
Process
Filename
Type
6744MRT.exeC:\Users\admin\AppData\Local\Temp\TMP000000066DDC5B3985B279DD —
MD5:—
SHA256:—
6744MRT.exeC:\Users\admin\AppData\Local\Temp\mpengine.dllexecutable
MD5:927553366341AA701F3CE795BA6D3CD6
SHA256:F2B0C63F24963159F84D8C8E5C0D01E2E3B65D84C191A1367935A41BF1CCFCED
6688mrtstub.exeC:\Windows\SysWOW64\MRT.exeexecutable
MD5:17A08C8124CD99EFCB1D677FBF7CBF86
SHA256:A476ED3D6309F376C6A6F716F0536E265D88739CABCE6BF42FC30D35FFC54380
6372Windows-KB890830-V1.34.exeC:\0feca2bbf60626d4fed714874a790897\mrtstub.exeexecutable
MD5:D6FDD814EC24E3FD576E154590BE7759
SHA256:BB883F087533FB4BF520D2ED4B055E6A86C39A415C220862395D9BE1FEC4BECA
6372Windows-KB890830-V1.34.exeC:\0feca2bbf60626d4fed714874a790897\mrt.exeexecutable
MD5:17A08C8124CD99EFCB1D677FBF7CBF86
SHA256:A476ED3D6309F376C6A6F716F0536E265D88739CABCE6BF42FC30D35FFC54380
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
9
TCP/UDP connections
32
DNS requests
17
Threats
0

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
—
—
GET
200
2.17.190.73:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTrjrydRyt%2BApF3GSPypfHBxR5XtQQUs9tIpPmhxdiuNkHMEWNpYim8S8YCEAI5PUjXAkJafLQcAAsO18o%3D
unknown
—
—
whitelisted
4712
MoUsoCoreWorker.exe
GET
200
23.48.23.149:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl
unknown
—
—
whitelisted
—
—
GET
200
23.48.23.149:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl
unknown
—
—
whitelisted
4712
MoUsoCoreWorker.exe
GET
200
184.30.21.171:80
http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl
unknown
—
—
whitelisted
—
—
GET
200
184.30.21.171:80
http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl
unknown
—
—
whitelisted
1176
svchost.exe
GET
200
2.17.190.73:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D
unknown
—
—
whitelisted
6648
SIHClient.exe
GET
200
95.101.149.131:80
http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl
unknown
—
—
whitelisted
6648
SIHClient.exe
GET
200
95.101.149.131:80
http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl
unknown
—
—
whitelisted
6448
backgroundTaskHost.exe
GET
200
2.23.77.188:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEAUZZSZEml49Gjh0j13P68w%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
—
—
51.104.136.2:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
4
System
192.168.100.255:137
—
—
—
whitelisted
5064
SearchApp.exe
104.126.37.154:443
www.bing.com
Akamai International B.V.
DE
whitelisted
4712
MoUsoCoreWorker.exe
23.48.23.149:80
crl.microsoft.com
Akamai International B.V.
DE
whitelisted
—
—
2.17.190.73:80
ocsp.digicert.com
AKAMAI-AS
DE
whitelisted
—
—
23.48.23.149:80
crl.microsoft.com
Akamai International B.V.
DE
whitelisted
4712
MoUsoCoreWorker.exe
184.30.21.171:80
www.microsoft.com
AKAMAI-AS
DE
whitelisted
—
—
184.30.21.171:80
www.microsoft.com
AKAMAI-AS
DE
whitelisted
4
System
192.168.100.255:138
—
—
—
whitelisted
1176
svchost.exe
20.190.159.128:443
login.live.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted

DNS requests

Domain
IP
Reputation
settings-win.data.microsoft.com
  • 51.104.136.2
  • 40.127.240.158
whitelisted
www.bing.com
  • 104.126.37.154
  • 104.126.37.152
  • 104.126.37.168
  • 104.126.37.171
  • 104.126.37.153
  • 104.126.37.162
  • 104.126.37.170
  • 104.126.37.161
  • 104.126.37.155
whitelisted
google.com
  • 142.250.186.46
whitelisted
ocsp.digicert.com
  • 2.17.190.73
  • 2.23.77.188
whitelisted
crl.microsoft.com
  • 23.48.23.149
  • 23.48.23.146
  • 23.48.23.139
  • 23.48.23.141
  • 23.48.23.150
  • 23.48.23.148
  • 23.48.23.143
  • 23.48.23.153
  • 23.48.23.138
whitelisted
www.microsoft.com
  • 184.30.21.171
  • 95.101.149.131
whitelisted
login.live.com
  • 20.190.159.128
  • 40.126.31.73
  • 40.126.31.2
  • 40.126.31.67
  • 40.126.31.131
  • 40.126.31.1
  • 20.190.159.73
  • 20.190.159.75
whitelisted
go.microsoft.com
  • 23.35.238.131
whitelisted
arc.msn.com
  • 20.199.58.43
whitelisted
fd.api.iris.microsoft.com
  • 20.223.35.26
whitelisted

Threats

No threats detected
No debug info
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Reports
Windows-KB890830-V1.34.exe