URL:

https://cdn.krnl.rocks/krnl_bootstrapper.rar

Full analysis: https://app.any.run/tasks/31cb791c-de90-49c9-aab4-39292423ba85
Verdict: Malicious activity
Analysis date: December 08, 2020, 17:02:15
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Indicators:
MD5:

22F0F2B6AAC345926982E353B8206085

SHA1:

EBEC46B3E86DE3BD84B5429CFC41D82B383F2042

SHA256:

AD92658C8C264C6CC213199F3544C66BD5583B9DA41EFB081EEDCE89B8D3AFE4

SSDEEP:

3:N8cAL9KOtrDXEwOn:2c2KILEwO

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

    • Application was dropped or rewritten from another process

      • krnl_bootstrapper_v3.exe (PID: 2472)

  • SUSPICIOUS

    • Drops a file with too old compile date

      • WinRAR.exe (PID: 3096)

    • Executable content was dropped or overwritten

      • WinRAR.exe (PID: 3096)

    • Reads Environment values

      • krnl_bootstrapper_v3.exe (PID: 2472)

  • INFO

    • Reads settings of System Certificates

      • iexplore.exe (PID: 1472)
      • iexplore.exe (PID: 1868)

    • Modifies the phishing filter of IE

      • iexplore.exe (PID: 1472)

    • Creates files in the user directory

      • iexplore.exe (PID: 1472)
      • iexplore.exe (PID: 1868)

    • Adds / modifies Windows certificates

      • iexplore.exe (PID: 1472)

    • Changes settings of System certificates

      • iexplore.exe (PID: 1472)

    • Changes internet zones settings

      • iexplore.exe (PID: 1472)

    • Application launched itself

      • iexplore.exe (PID: 1472)

    • Reads internet explorer settings

      • iexplore.exe (PID: 1868)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.
No data.
screenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
38
Monitored processes
4
Malicious processes
0
Suspicious processes
0

Behavior graph

Click at the process to see the details
start drop and start iexplore.exe iexplore.exe winrar.exe krnl_bootstrapper_v3.exe

Process information

PID
CMD
Path
Indicators
Parent process
1472"C:\Program Files\Internet Explorer\iexplore.exe" https://cdn.krnl.rocks/krnl_bootstrapper.rarC:\Program Files\Internet Explorer\iexplore.exe
explorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
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:\systemroot\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
1868"C:\Program Files\Internet Explorer\iexplore.exe" SCODEF:1472 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:\systemroot\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
2472"C:\Users\admin\AppData\Local\Temp\Rar$EXa3096.38779\krnl_bootstrapper_v3.exe" C:\Users\admin\AppData\Local\Temp\Rar$EXa3096.38779\krnl_bootstrapper_v3.exe
WinRAR.exe
User:
admin
Integrity Level:
MEDIUM
Description:
krnl
Exit code:
4294967295
Version:
1.0.0.0
Modules
Images
c:\users\admin\appdata\local\temp\rar$exa3096.38779\krnl_bootstrapper_v3.exe
c:\systemroot\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
3096"C:\Program Files\WinRAR\WinRAR.exe" "C:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\PO2HN1X2\krnl_bootstrapper.rar"C:\Program Files\WinRAR\WinRAR.exe
iexplore.exe
User:
admin
Company:
Alexander Roshal
Integrity Level:
MEDIUM
Description:
WinRAR archiver
Exit code:
0
Version:
5.60.0
Modules
Images
c:\program files\winrar\winrar.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\comdlg32.dll
Total events
1 487
Read events
1 361
Write events
124
Delete events
2

Modification events

(PID) Process:(1472) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\UrlBlockManager
Operation:writeName:NextCheckForUpdateLowDateTime
Value:
4285211824
(PID) Process:(1472) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\UrlBlockManager
Operation:writeName:NextCheckForUpdateHighDateTime
Value:
30854531
(PID) Process:(1472) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content
Operation:writeName:CachePrefix
Value:
(PID) Process:(1472) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies
Operation:writeName:CachePrefix
Value:
Cookie:
(PID) Process:(1472) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History
Operation:writeName:CachePrefix
Value:
Visited:
(PID) Process:(1472) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
Operation:writeName:CompatibilityFlags
Value:
0
(PID) Process:(1472) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
Operation:writeName:ProxyEnable
Value:
0
(PID) Process:(1472) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections
Operation:writeName:SavedLegacySettings
Value:
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
(PID) Process:(1472) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:UNCAsIntranet
Value:
0
(PID) Process:(1472) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:AutoDetect
Value:
1
Executable files
2
Suspicious files
14
Text files
5
Unknown types
4

Dropped files

PID
Process
Filename
Type
1472iexplore.exeC:\Users\admin\AppData\LocalLow\Microsoft\Internet Explorer\Services\search_{0633EE93-D776-472f-A0FF-E1416B8B2E3A}.ico —
MD5:—
SHA256:—
1868iexplore.exeC:\Users\admin\AppData\Local\Temp\Low\CabCDA8.tmp —
MD5:—
SHA256:—
1868iexplore.exeC:\Users\admin\AppData\Local\Temp\Low\TarCDA9.tmp —
MD5:—
SHA256:—
1472iexplore.exeC:\Users\admin\AppData\Local\Temp\~DF2579D0D79F35A3FC.TMP —
MD5:—
SHA256:—
1472iexplore.exeC:\Users\admin\AppData\Local\Temp\CabF70A.tmp —
MD5:—
SHA256:—
1472iexplore.exeC:\Users\admin\AppData\Local\Temp\TarF70B.tmp —
MD5:—
SHA256:—
1472iexplore.exeC:\Users\admin\AppData\Local\Microsoft\Internet Explorer\VersionManager\verF73B.tmp —
MD5:—
SHA256:—
1868iexplore.exeC:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Low\Content.IE5\MFAQUS6V\krnl_bootstrapper[1].rar —
MD5:—
SHA256:—
1868iexplore.exeC:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\PO2HN1X2\krnl_bootstrapper.rar.ens9olp.partial —
MD5:—
SHA256:—
1472iexplore.exeC:\Users\admin\AppData\Local\Temp\~DF5BB13220EFD1969B.TMP —
MD5:—
SHA256:—
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
5
TCP/UDP connections
17
DNS requests
11
Threats
0

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
1868
iexplore.exe
GET
200
93.184.220.29:80
http://crl3.digicert.com/Omniroot2025.crl
US
der
7.30 Kb
whitelisted
1868
iexplore.exe
GET
200
93.184.220.29:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTBL0V27RVZ7LBduom%2FnYB45SPUEwQU5Z1ZMIJHWMys%2BghUNoZ7OrUETfACEAo3h2ReX7SMIk79G%2B0UDDw%3D
US
der
1.47 Kb
whitelisted
1868
iexplore.exe
GET
200
93.184.220.29:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQS14tALDViBvqCf47YkiQRtKz1BAQUpc436uuwdQ6UZ4i0RfrZJBCHlh8CEAgBK4RwMBjJuEFaTg2W1TU%3D
US
der
279 b
whitelisted
1472
iexplore.exe
GET
200
93.184.220.29:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D
US
der
471 b
whitelisted
1472
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
1868
iexplore.exe
104.27.171.84:443
cdn.krnl.rocks
Cloudflare Inc
US
shared
1472
iexplore.exe
204.79.197.200:80
www.bing.com
Microsoft Corporation
US
whitelisted
1868
iexplore.exe
172.67.205.182:443
cdn.krnl.rocks
—
US
suspicious
1868
iexplore.exe
93.184.220.29:80
ocsp.digicert.com
MCI Communications Services, Inc. d/b/a Verizon Business
US
whitelisted
1472
iexplore.exe
13.107.21.200:80
www.bing.com
Microsoft Corporation
US
whitelisted
1472
iexplore.exe
152.199.19.161:443
iecvlist.microsoft.com
MCI Communications Services, Inc. d/b/a Verizon Business
US
whitelisted
1472
iexplore.exe
93.184.220.29:80
ocsp.digicert.com
MCI Communications Services, Inc. d/b/a Verizon Business
US
whitelisted
—
—
204.79.197.200:443
www.bing.com
Microsoft Corporation
US
whitelisted
2472
krnl_bootstrapper_v3.exe
104.27.171.84:443
cdn.krnl.rocks
Cloudflare Inc
US
shared

DNS requests

Domain
IP
Reputation
cdn.krnl.rocks
  • 104.27.171.84
  • 172.67.205.182
  • 104.27.170.84
malicious
api.bing.com
  • 13.107.13.80
whitelisted
www.bing.com
  • 204.79.197.200
  • 13.107.21.200
whitelisted
ocsp.digicert.com
  • 93.184.220.29
whitelisted
crl3.digicert.com
  • 93.184.220.29
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
krnl.rocks
  • 104.27.171.84
  • 172.67.205.182
  • 104.27.170.84
unknown

Threats

No threats detected
No debug info
Interactive malware hunting service ANY.RUN
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Reports
https://cdn.krnl.rocks/krnl_bootstrapper.rar