URL:

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

Full analysis: https://app.any.run/tasks/8966de72-389b-4f0f-a0fb-6e9bf0a5e673
Verdict: Malicious activity
Analysis date: December 08, 2020, 17:00:27
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: 184)

  • SUSPICIOUS

    • Executable content was dropped or overwritten

      • WinRAR.exe (PID: 3704)

    • Reads Environment values

      • krnl_bootstrapper_v3.exe (PID: 184)

    • Drops a file with too old compile date

      • WinRAR.exe (PID: 3704)

  • INFO

    • Changes internet zones settings

      • iexplore.exe (PID: 2236)

    • Reads settings of System Certificates

      • iexplore.exe (PID: 1352)

    • Application launched itself

      • iexplore.exe (PID: 2236)

    • Creates files in the user directory

      • iexplore.exe (PID: 1352)

    • Modifies the phishing filter of IE

      • iexplore.exe (PID: 2236)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.
No data.
screenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
36
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 no specs iexplore.exe winrar.exe krnl_bootstrapper_v3.exe

Process information

PID
CMD
Path
Indicators
Parent process
184"C:\Users\admin\AppData\Local\Temp\Rar$EXa3704.19073\krnl_bootstrapper_v3.exe" C:\Users\admin\AppData\Local\Temp\Rar$EXa3704.19073\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$exa3704.19073\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\msvcrt.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\microsoft.net\framework\v4.0.30319\mscoreei.dll
1352"C:\Program Files\Internet Explorer\iexplore.exe" SCODEF:2236 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
2236"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
3704"C:\Program Files\WinRAR\WinRAR.exe" "C:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\6Z2BCOUL\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
1 530
Read events
1 447
Write events
83
Delete events
0

Modification events

(PID) Process:(2236) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\UrlBlockManager
Operation:writeName:NextCheckForUpdateLowDateTime
Value:
3181619324
(PID) Process:(2236) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\UrlBlockManager
Operation:writeName:NextCheckForUpdateHighDateTime
Value:
30854531
(PID) Process:(2236) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content
Operation:writeName:CachePrefix
Value:
(PID) Process:(2236) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies
Operation:writeName:CachePrefix
Value:
Cookie:
(PID) Process:(2236) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History
Operation:writeName:CachePrefix
Value:
Visited:
(PID) Process:(2236) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
Operation:writeName:CompatibilityFlags
Value:
0
(PID) Process:(2236) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
Operation:writeName:ProxyEnable
Value:
0
(PID) Process:(2236) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections
Operation:writeName:SavedLegacySettings
Value:
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
(PID) Process:(2236) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:UNCAsIntranet
Value:
0
(PID) Process:(2236) iexplore.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:AutoDetect
Value:
1
Executable files
2
Suspicious files
12
Text files
2
Unknown types
4

Dropped files

PID
Process
Filename
Type
1352iexplore.exeC:\Users\admin\AppData\Local\Temp\Low\Cab7298.tmp —
MD5:—
SHA256:—
1352iexplore.exeC:\Users\admin\AppData\Local\Temp\Low\Tar7299.tmp —
MD5:—
SHA256:—
2236iexplore.exeC:\Users\admin\AppData\Local\Temp\~DFD9FE0DD4E665610D.TMP —
MD5:—
SHA256:—
2236iexplore.exeC:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\6Z2BCOUL\krnl_bootstrapper.rar.lonrwp9.partial:Zone.Identifier —
MD5:—
SHA256:—
1352iexplore.exeC:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\6BADA8974A10C4BD62CC921D13E43B18_28DEA62A0AE77228DD387E155AD0BA27binary
MD5:—
SHA256:—
1352iexplore.exeC:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\6BADA8974A10C4BD62CC921D13E43B18_28DEA62A0AE77228DD387E155AD0BA27der
MD5:—
SHA256:—
2236iexplore.exeC:\Users\admin\AppData\Local\Microsoft\Internet Explorer\Recovery\Active\{E95DE0E3-3976-11EB-B41E-12A9866C77DE}.datbinary
MD5:—
SHA256:—
1352iexplore.exeC:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\9FF67FB3141440EED32363089565AE60_8E951DA6A0241FD49B38A76FD526157Dder
MD5:—
SHA256:—
1352iexplore.exeC:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\9FF67FB3141440EED32363089565AE60_8E951DA6A0241FD49B38A76FD526157Dbinary
MD5:—
SHA256:—
1352iexplore.exeC:\Users\admin\AppData\Roaming\Microsoft\Windows\Cookies\Low\1R7PM4QA.txttext
MD5:—
SHA256:—
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
4
TCP/UDP connections
5
DNS requests
4
Threats
0

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
1352
iexplore.exe
GET
200
93.184.220.29:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTBL0V27RVZ7LBduom%2FnYB45SPUEwQU5Z1ZMIJHWMys%2BghUNoZ7OrUETfACEAo3h2ReX7SMIk79G%2B0UDDw%3D
US
der
1.47 Kb
whitelisted
1352
iexplore.exe
GET
200
93.184.220.29:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQS14tALDViBvqCf47YkiQRtKz1BAQUpc436uuwdQ6UZ4i0RfrZJBCHlh8CEAgBK4RwMBjJuEFaTg2W1TU%3D
US
der
279 b
whitelisted
1352
iexplore.exe
GET
200
93.184.220.29:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQS14tALDViBvqCf47YkiQRtKz1BAQUpc436uuwdQ6UZ4i0RfrZJBCHlh8CEAgBK4RwMBjJuEFaTg2W1TU%3D
US
der
279 b
whitelisted
1352
iexplore.exe
GET
200
93.184.220.29:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTBL0V27RVZ7LBduom%2FnYB45SPUEwQU5Z1ZMIJHWMys%2BghUNoZ7OrUETfACEAo3h2ReX7SMIk79G%2B0UDDw%3D
US
der
1.47 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
1352
iexplore.exe
104.27.170.84:443
cdn.krnl.rocks
Cloudflare Inc
US
shared
1352
iexplore.exe
93.184.220.29:80
ocsp.digicert.com
MCI Communications Services, Inc. d/b/a Verizon Business
US
whitelisted
184
krnl_bootstrapper_v3.exe
104.27.170.84:443
cdn.krnl.rocks
Cloudflare Inc
US
shared

DNS requests

Domain
IP
Reputation
cdn.krnl.rocks
  • 104.27.170.84
  • 172.67.205.182
  • 104.27.171.84
malicious
ocsp.digicert.com
  • 93.184.220.29
whitelisted
krnl.rocks
  • 104.27.170.84
  • 172.67.205.182
  • 104.27.171.84
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