URL:

https://statics.teams.cdn.office.net/production-windows-x64/1.7.00.1864/Teams_windows_x64.exe

Full analysis: https://app.any.run/tasks/de9d7d66-ee59-49be-9b6a-d03ab58465d5
Verdict: Malicious activity
Analysis date: February 11, 2024, 09:23:28
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Indicators:
MD5:

A7824F9CA81D1BA12E75DADF77E16AD6

SHA1:

500BA64006536DF0E852459DCABE1B6125B131C7

SHA256:

9025744F0368AD0E3A4339DDC254DD6A5EC75603D7560F8A38AF1128EFAA5569

SSDEEP:

3:N8cwu9puaQGRMdv3LSheMhu/xN:2cDH7TRMdv3LYeyu5N

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 the executable file immediately after the start

      • Teams_windows_x64.exe (PID: 2408)
      • Update.exe (PID: 2672)

  • SUSPICIOUS

    • Executable content was dropped or overwritten

      • Teams_windows_x64.exe (PID: 2408)
      • Update.exe (PID: 2672)

    • Process drops legitimate windows executable

      • Teams_windows_x64.exe (PID: 2408)
      • Update.exe (PID: 2672)

    • Reads the Internet Settings

      • Update.exe (PID: 2672)
      • Squirrel.exe (PID: 3068)

    • Reads security settings of Internet Explorer

      • Update.exe (PID: 2672)

    • The process drops C-runtime libraries

      • Update.exe (PID: 2672)

    • Reads settings of System Certificates

      • Update.exe (PID: 2672)
      • Squirrel.exe (PID: 3068)

    • Start notepad (likely ransomware note)

      • Teams_windows_x64.exe (PID: 2408)

  • INFO

    • Reads the computer name

      • Update.exe (PID: 2672)
      • Squirrel.exe (PID: 3068)
      • Teams_windows_x64.exe (PID: 2408)

    • The process uses the downloaded file

      • iexplore.exe (PID: 3668)

    • Creates files or folders in the user directory

      • Update.exe (PID: 2672)
      • Teams_windows_x64.exe (PID: 2408)
      • Squirrel.exe (PID: 3068)

    • Checks supported languages

      • Update.exe (PID: 2672)
      • Teams_windows_x64.exe (PID: 2408)
      • Squirrel.exe (PID: 3068)

    • Modifies the phishing filter of IE

      • iexplore.exe (PID: 3668)

    • Application launched itself

      • iexplore.exe (PID: 3668)

    • Executable content was dropped or overwritten

      • iexplore.exe (PID: 3972)

    • Drops the executable file immediately after the start

      • iexplore.exe (PID: 3972)

    • Reads the machine GUID from the registry

      • Update.exe (PID: 2672)
      • Squirrel.exe (PID: 3068)

    • Reads Environment values

      • Update.exe (PID: 2672)
      • Squirrel.exe (PID: 3068)

    • Reads Microsoft Office registry keys

      • Update.exe (PID: 2672)
      • Squirrel.exe (PID: 3068)

    • Create files in a temporary directory

      • Update.exe (PID: 2672)

    • Reads the software policy settings

      • Update.exe (PID: 2672)
      • Squirrel.exe (PID: 3068)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.
No data.
screenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
43
Monitored processes
6
Malicious processes
4
Suspicious processes
0

Behavior graph

Click at the process to see the details
start iexplore.exe iexplore.exe teams_windows_x64.exe update.exe squirrel.exe notepad.exe no specs

Process information

PID
CMD
Path
Indicators
Parent process
2408"C:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\6Z2BCOUL\Teams_windows_x64.exe" C:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\6Z2BCOUL\Teams_windows_x64.exe
iexplore.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Microsoft Teams
Exit code:
4294967295
Version:
1.7.00.1864
Modules
Images
c:\users\admin\appdata\local\microsoft\windows\temporary internet files\content.ie5\6z2bcoul\teams_windows_x64.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\advapi32.dll
2592"C:\Windows\system32\NOTEPAD.EXE" C:\Users\admin\AppData\Local\SquirrelTemp\SquirrelSetup.logC:\Windows\System32\notepad.exe—Teams_windows_x64.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Notepad
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\notepad.exe
c:\windows\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\gdi32.dll
c:\windows\system32\user32.dll
2672"C:\Users\admin\AppData\Local\SquirrelTemp\Update.exe" --install . --exeName=Teams_windows_x64.exeC:\Users\admin\AppData\Local\SquirrelTemp\Update.exe
Teams_windows_x64.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Microsoft Teams classic
Exit code:
4294967295
Version:
3.3.11.0
Modules
Images
c:\users\admin\appdata\local\squirreltemp\update.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\mscoree.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\microsoft.net\framework\v4.0.30319\mscoreei.dll
3068"C:\Users\admin\AppData\Local\Microsoft\Teams\current\Squirrel.exe" --updateSelf=C:\Users\admin\AppData\Local\SquirrelTemp\Update.exeC:\Users\admin\AppData\Local\Microsoft\Teams\current\Squirrel.exe
Update.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Microsoft Teams classic
Exit code:
0
Version:
3.3.11.0
Modules
Images
c:\users\admin\appdata\local\microsoft\teams\current\squirrel.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\mscoree.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\microsoft.net\framework\v4.0.30319\mscoreei.dll
3668"C:\Program Files\Internet Explorer\iexplore.exe" "https://statics.teams.cdn.office.net/production-windows-x64/1.7.00.1864/Teams_windows_x64.exe"C:\Program Files\Internet Explorer\iexplore.exe
explorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Internet Explorer
Exit code:
1
Version:
11.00.9600.16428 (winblue_gdr.131013-1700)
Modules
Images
c:\program files\internet explorer\iexplore.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\api-ms-win-downlevel-advapi32-l1-1-0.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\iertutil.dll
3972"C:\Program Files\Internet Explorer\iexplore.exe" SCODEF:3668 CREDAT:267521 /prefetch:2C:\Program Files\Internet Explorer\iexplore.exe
iexplore.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
LOW
Description:
Internet Explorer
Exit code:
0
Version:
11.00.9600.16428 (winblue_gdr.131013-1700)
Modules
Images
c:\program files\internet explorer\iexplore.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\api-ms-win-downlevel-advapi32-l1-1-0.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\iertutil.dll
Total events
36 646
Read events
36 459
Write events
152
Delete events
35

Modification events

(PID) Process:(3668) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\TabbedBrowsing
Operation:writeName:NTPDaysSinceLastAutoMigration
Value:
1
(PID) Process:(3668) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\TabbedBrowsing
Operation:writeName:NTPLastLaunchLowDateTime
Value:
(PID) Process:(3668) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\TabbedBrowsing
Operation:writeName:NTPLastLaunchHighDateTime
Value:
31087819
(PID) Process:(3668) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\UrlBlockManager
Operation:writeName:NextCheckForUpdateLowDateTime
Value:
256429030
(PID) Process:(3668) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\UrlBlockManager
Operation:writeName:NextCheckForUpdateHighDateTime
Value:
31087820
(PID) Process:(3668) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content
Operation:writeName:CachePrefix
Value:
(PID) Process:(3668) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies
Operation:writeName:CachePrefix
Value:
Cookie:
(PID) Process:(3668) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History
Operation:writeName:CachePrefix
Value:
Visited:
(PID) Process:(3668) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
Operation:writeName:CompatibilityFlags
Value:
0
(PID) Process:(3668) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:ProxyBypass
Value:
1
Executable files
222
Suspicious files
131
Text files
123
Unknown types
14

Dropped files

PID
Process
Filename
Type
3668iexplore.exeC:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\80237EE4964FC9C409AAF55BF996A292_C0427F5F77D9B3A439FC620EDAAB6177der
MD5:F9E4490010441A4166E0D7308876DB47
SHA256:A64FCDB115146F13718A8549F347248CA6382CB9795BB693C915217C821E46A7
3668iexplore.exeC:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776binary
MD5:E941407CC2A8F2CF7A905A6693918BCE
SHA256:DB2766E4E87B1BA4D8D025D73C9F505F7CB25D561F784E0AE7CEEAAE37D3D39B
3972iexplore.exeC:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\80237EE4964FC9C409AAF55BF996A292_E503B048B745DFA14B81FCFC68D6DECEbinary
MD5:F0B5C2A24A06C274FA5D30FD3B5C4F32
SHA256:36B234FFC641448376D58D4893DEF34D9594B301600B905B744405221033A67A
3668iexplore.exeC:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776der
MD5:AE042CBB1AC8C1449D76ACCECF94DD81
SHA256:B186D44EF30080B9D84D7DD60AEE0B63265D192602AE4C5AE33D5048F787D653
3972iexplore.exeC:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Low\Content.IE5\MFAQUS6V\Teams_windows_x64[1].exeexecutable
MD5:D52C5BF74F2E6A353317CDC4A788D442
SHA256:0679BDBCE48188E84F667FBD61A703F667C3A01CA4E90D7442587ED9708B3643
3668iexplore.exeC:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\B6QGX7LP\urlblockindex[1].binbinary
MD5:FA518E3DFAE8CA3A0E495460FD60C791
SHA256:775853600060162C4B4E5F883F9FD5A278E61C471B3EE1826396B6D129499AA7
3668iexplore.exeC:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\80237EE4964FC9C409AAF55BF996A292_C0427F5F77D9B3A439FC620EDAAB6177binary
MD5:5DC78C1ABA3E45732D64E0860F2F3AF0
SHA256:EA54C93893699E71D3AE57C05E267F23A707C479A9088D1A85D6F16B78045A83
3668iexplore.exeC:\Users\admin\AppData\Local\Microsoft\Internet Explorer\DomainSuggestions\en-US.4binary
MD5:5A34CB996293FDE2CB7A4AC89587393A
SHA256:C6A5377CBC07EECE33790CFC70572E12C7A48AD8296BE25C0CC805A1F384DBAD
3972iexplore.exeC:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\6Z2BCOUL\Teams_windows_x64.exe.v3k9p51.partial —
MD5:—
SHA256:—
3668iexplore.exeC:\Users\admin\AppData\Roaming\Microsoft\Windows\Cookies\NIF6D02N.txttext
MD5:A8D099CE79D91544C37A3F4106327F17
SHA256:2F06473964D39EC7117929E5CCB240A193721A418C3CEC764733F917D4C20E31
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
11
TCP/UDP connections
25
DNS requests
10
Threats
0

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
3972
iexplore.exe
GET
304
93.184.221.240:80
http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?f78d505714a595e3
unknown
—
—
unknown
3972
iexplore.exe
GET
200
192.229.221.95:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEALnkXH7gCHpP%2BLZg4NMUMA%3D
unknown
binary
471 b
unknown
3668
iexplore.exe
GET
304
93.184.221.240:80
http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?e55f0cb727843010
unknown
—
—
unknown
3668
iexplore.exe
GET
304
93.184.221.240:80
http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?b0be6f4ad90be2e5
unknown
—
—
unknown
3668
iexplore.exe
GET
304
93.184.221.240:80
http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?719f0b64dcb4a601
unknown
—
—
unknown
3668
iexplore.exe
GET
200
192.229.221.95:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D
unknown
binary
471 b
unknown
1080
svchost.exe
GET
200
93.184.221.240:80
http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab?89bca2e7018c82c0
unknown
compressed
65.2 Kb
unknown
3668
iexplore.exe
GET
200
192.229.221.95:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEAxq6XzO1ZmDhpCgCp6lMhQ%3D
unknown
binary
471 b
unknown
3668
iexplore.exe
GET
200
192.229.221.95:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEAn5bsKVVV8kdJ6vHl3O1J0%3D
unknown
binary
471 b
unknown
3972
iexplore.exe
GET
304
93.184.221.240:80
http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?545e1839169dd0e6
unknown
—
—
unknown
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID
Process
IP
Domain
ASN
CN
Reputation
4
System
192.168.100.255:137
—
—
—
whitelisted
4
System
192.168.100.255:138
—
—
—
whitelisted
3972
iexplore.exe
2.16.164.130:443
statics.teams.cdn.office.net
Akamai International B.V.
NL
unknown
1080
svchost.exe
224.0.0.252:5355
—
—
—
unknown
3972
iexplore.exe
93.184.221.240:80
ctldl.windowsupdate.com
EDGECAST
GB
whitelisted
3972
iexplore.exe
192.229.221.95:80
ocsp.digicert.com
EDGECAST
US
whitelisted
3668
iexplore.exe
152.199.19.161:443
iecvlist.microsoft.com
EDGECAST
US
whitelisted
3668
iexplore.exe
93.184.221.240:80
ctldl.windowsupdate.com
EDGECAST
GB
whitelisted
3668
iexplore.exe
192.229.221.95:80
ocsp.digicert.com
EDGECAST
US
whitelisted
1080
svchost.exe
93.184.221.240:80
ctldl.windowsupdate.com
EDGECAST
GB
whitelisted

DNS requests

Domain
IP
Reputation
statics.teams.cdn.office.net
  • 2.16.164.130
  • 2.16.164.41
whitelisted
ctldl.windowsupdate.com
  • 93.184.221.240
whitelisted
ocsp.digicert.com
  • 192.229.221.95
whitelisted
iecvlist.microsoft.com
  • 152.199.19.161
whitelisted
r20swj13mr.microsoft.com
  • 152.199.19.161
whitelisted
ieonline.microsoft.com
  • 204.79.197.200
whitelisted
go.microsoft.com
  • 23.213.166.81
whitelisted
www.msn.com
  • 204.79.197.203
whitelisted
mobile.pipe.aria.microsoft.com
  • 20.42.73.24
  • 20.189.173.8
whitelisted

Threats

No threats detected
Process
Message
Update.exe
Update.exe Information: 0 :
Update.exe
Starting TelemetryManager constructor
Update.exe
Update.exe Information: 0 :
Update.exe
TelemetryManagerImpl creation started
Update.exe
Update.exe Information: 0 :
Update.exe
Performance counters are disabled. Skipping creation of counters category.
Update.exe
Update.exe Information: 0 :
Update.exe
RecordBatcherTask with ID 4 started.
Update.exe
Update.exe Information: 0 :
Update.exe
DataPackageSender with UserAgent name: AST-exe-C#, version: 3.3.11.0, [Ast_Default_Source]
Interactive malware hunting service ANY.RUN
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ANY.RUN
Reports
https://statics.teams.cdn.office.net/production-windows-x64/1.7.00.1864/Teams_windows_x64.exe