File name:

krnl_bootstrapper_v3.exe

Full analysis: https://app.any.run/tasks/7c92167c-e3de-4969-80bb-76dcc10f11fe
Verdict: Malicious activity
Threats:

A loader is malicious software that infiltrates devices to deliver malicious payloads. This malware is capable of infecting victims’ computers, analyzing their system information, and installing other types of threats, such as trojans or stealers. Criminals usually deliver loaders through phishing emails and links by relying on social engineering to trick users into downloading and running their executables. Loaders employ advanced evasion and persistence tactics to avoid detection.

Analysis date: September 25, 2020, 14:56:08
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Tags:
loader
trojan
Indicators:
MIME: application/x-dosexec
File info: PE32 executable (console) Intel 80386 Mono/.Net assembly, for MS Windows
MD5:

FF28CAC84B1CFEAAE4457CEA2BEAF117

SHA1:

D0D45BA39F45020879E404DF701470BDF0309A13

SHA256:

B3A7EE4B2BB28E8532626CCEE4159B0991424F6CECC4799388AEF386B2717954

SSDEEP:

24576:yhY2gUfVH5XlVYzagW4/3rn0Y5zmzRf1P2MVMgnq5VrnHugIJ96FTx4XclQg:LENH5X3ngbrnL5yzpVM15VrnOgIqUXcD

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

    • Connects to CnC server

      • krnl_bootstrapper_v3.exe (PID: 2512)
  • SUSPICIOUS

    • Uses IPCONFIG.EXE to discover IP address

      • krnl_bootstrapper_v3.exe (PID: 2512)
    • Executable content was dropped or overwritten

      • krnl_bootstrapper_v3.exe (PID: 2512)
  • INFO

    • Reads the hosts file

      • krnl_bootstrapper_v3.exe (PID: 2512)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.

TRiD

.exe | Generic CIL Executable (.NET, Mono, etc.) (63.1)
.exe | Win64 Executable (generic) (23.8)
.dll | Win32 Dynamic Link Library (generic) (5.6)
.exe | Win32 Executable (generic) (3.8)
.exe | Generic Win/DOS Executable (1.7)

EXIF

EXE

MachineType: Intel 386 or later, and compatibles
TimeStamp: 2071:04:21 16:57:52+02:00
PEType: PE32
LinkerVersion: 48
CodeSize: 1182208
InitializedDataSize: 190464
UninitializedDataSize: -
EntryPoint: 0x122916
OSVersion: 4
ImageVersion: -
SubsystemVersion: 6
Subsystem: Windows command line
FileVersionNumber: 1.0.0.0
ProductVersionNumber: 1.0.0.0
FileFlagsMask: 0x003f
FileFlags: (none)
FileOS: Win32
ObjectFileType: Executable application
FileSubtype: -
LanguageCode: Neutral
CharacterSet: Unicode
Comments: -
CompanyName: -
FileDescription: krnl_bootstrapper_v3
FileVersion: 1.0.0.0
InternalName: krnl_bootstrapper_v3.exe
LegalCopyright: Copyright © 2020
LegalTrademarks: -
OriginalFileName: krnl_bootstrapper_v3.exe
ProductName: krnl_bootstrapper_v3
ProductVersion: 1.0.0.0
AssemblyVersion: 1.0.0.0

Summary

Architecture: IMAGE_FILE_MACHINE_I386
Subsystem: IMAGE_SUBSYSTEM_WINDOWS_CUI
Compilation Date: 16-Mar-1935 08:29:36
Debug artifacts:
  • C:\Users\Keshiki\source\repos\krnl_bootstrapper_v3\krnl_bootstrapper_v3\obj\Release\krnl_bootstrapper_v3.pdb
Comments: -
CompanyName: -
FileDescription: krnl_bootstrapper_v3
FileVersion: 1.0.0.0
InternalName: krnl_bootstrapper_v3.exe
LegalCopyright: Copyright © 2020
LegalTrademarks: -
OriginalFilename: krnl_bootstrapper_v3.exe
ProductName: krnl_bootstrapper_v3
ProductVersion: 1.0.0.0
Assembly Version: 1.0.0.0

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: 0x00000080

PE Headers

Signature: PE
Machine: IMAGE_FILE_MACHINE_I386
Number of sections: 3
Time date stamp: 16-Mar-1935 08:29:36
Pointer to Symbol Table: 0x00000000
Number of symbols: 0
Size of Optional Header: 0x00E0
Characteristics:
  • IMAGE_FILE_EXECUTABLE_IMAGE
  • IMAGE_FILE_LARGE_ADDRESS_AWARE

Sections

Name
Virtual Address
Virtual Size
Raw Size
Charateristics
Entropy
.text
0x00002000
0x0012091C
0x00120A00
IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
6.64392
.rsrc
0x00124000
0x0002E4F0
0x0002E600
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
1.24274
.reloc
0x00154000
0x0000000C
0x00000200
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ
0.10191

Resources

Title
Entropy
Size
Codepage
Language
Type
1
5.00112
490
UNKNOWN
UNKNOWN
RT_MANIFEST
2
2.10543
2440
UNKNOWN
UNKNOWN
RT_ICON
3
1.9881
4264
UNKNOWN
UNKNOWN
RT_ICON
4
1.69507
9640
UNKNOWN
UNKNOWN
RT_ICON
5
1.07419
170248
UNKNOWN
UNKNOWN
RT_ICON
32512
2.88636
76
UNKNOWN
UNKNOWN
RT_GROUP_ICON

Imports

mscoree.dll
No data.
screenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
40
Monitored processes
2
Malicious processes
0
Suspicious processes
0

Behavior graph

Click at the process to see the details
start krnl_bootstrapper_v3.exe ipconfig.exe no specs

Process information

PID
CMD
Path
Indicators
Parent process
1204"C:\Windows\System32\ipconfig.exe" /flushdnsC:\Windows\System32\ipconfig.exekrnl_bootstrapper_v3.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
IP Configuration Utility
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\ipconfig.exe
c:\systemroot\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\dnsapi.dll
c:\windows\system32\ws2_32.dll
2512"C:\Users\admin\AppData\Local\Temp\krnl_bootstrapper_v3.exe" C:\Users\admin\AppData\Local\Temp\krnl_bootstrapper_v3.exe
explorer.exe
User:
admin
Integrity Level:
MEDIUM
Description:
krnl_bootstrapper_v3
Exit code:
0
Version:
1.0.0.0
Modules
Images
c:\users\admin\appdata\local\temp\krnl_bootstrapper_v3.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\mscoree.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
Total events
103
Read events
87
Write events
16
Delete events
0

Modification events

(PID) Process:(2512) krnl_bootstrapper_v3.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\krnl_bootstrapper_v3_RASAPI32
Operation:writeName:EnableFileTracing
Value:
0
(PID) Process:(2512) krnl_bootstrapper_v3.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\krnl_bootstrapper_v3_RASAPI32
Operation:writeName:EnableConsoleTracing
Value:
0
(PID) Process:(2512) krnl_bootstrapper_v3.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\krnl_bootstrapper_v3_RASAPI32
Operation:writeName:FileTracingMask
Value:
4294901760
(PID) Process:(2512) krnl_bootstrapper_v3.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\krnl_bootstrapper_v3_RASAPI32
Operation:writeName:ConsoleTracingMask
Value:
4294901760
(PID) Process:(2512) krnl_bootstrapper_v3.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\krnl_bootstrapper_v3_RASAPI32
Operation:writeName:MaxFileSize
Value:
1048576
(PID) Process:(2512) krnl_bootstrapper_v3.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\krnl_bootstrapper_v3_RASAPI32
Operation:writeName:FileDirectory
Value:
%windir%\tracing
(PID) Process:(2512) krnl_bootstrapper_v3.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\krnl_bootstrapper_v3_RASMANCS
Operation:writeName:EnableFileTracing
Value:
0
(PID) Process:(2512) krnl_bootstrapper_v3.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\krnl_bootstrapper_v3_RASMANCS
Operation:writeName:EnableConsoleTracing
Value:
0
(PID) Process:(2512) krnl_bootstrapper_v3.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\krnl_bootstrapper_v3_RASMANCS
Operation:writeName:FileTracingMask
Value:
4294901760
(PID) Process:(2512) krnl_bootstrapper_v3.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\krnl_bootstrapper_v3_RASMANCS
Operation:writeName:ConsoleTracingMask
Value:
4294901760
Executable files
8
Suspicious files
1
Text files
20
Unknown types
0

Dropped files

PID
Process
Filename
Type
2512krnl_bootstrapper_v3.exeC:\Users\admin\AppData\Local\Temp\krnl\krnlss.exeexecutable
MD5:
SHA256:
2512krnl_bootstrapper_v3.exeC:\Users\admin\AppData\Local\Temp\krnl_bootstrapper_v3.exeexecutable
MD5:
SHA256:
2512krnl_bootstrapper_v3.exeC:\Users\admin\AppData\Local\Temp\krnl\bin\Monaco\vs\basic-languages\lua\lua.jstext
MD5:
SHA256:
2512krnl_bootstrapper_v3.exeC:\Users\admin\AppData\Local\Temp\krnl\bin\Monaco.zipcompressed
MD5:
SHA256:
2512krnl_bootstrapper_v3.exeC:\Users\admin\AppData\Local\Temp\krnl\krnl.dllexecutable
MD5:
SHA256:
2512krnl_bootstrapper_v3.exeC:\Users\admin\AppData\Local\Temp\krnl\7za.exeexecutable
MD5:43141E85E7C36E31B52B22AB94D5E574
SHA256:EA308C76A2F927B160A143D94072B0DCE232E04B751F0C6432A94E05164E716D
2512krnl_bootstrapper_v3.exeC:\Users\admin\AppData\Local\Temp\krnl\bin\ScintillaNET.dllexecutable
MD5:9166536C31F4E725E6BEFE85E2889A4B
SHA256:AD0CC5A4D4A6AAE06EE360339C851892B74B8A275CE89C1B48185672179F3163
2512krnl_bootstrapper_v3.exeC:\Users\admin\AppData\Local\Temp\krnl\bin\Bunifu_UI_v1.5.3.dllexecutable
MD5:2ECB51AB00C5F340380ECF849291DBCF
SHA256:F1B3E0F2750A9103E46A6A4A34F1CF9D17779725F98042CC2475EC66484801CF
2512krnl_bootstrapper_v3.exeC:\Users\admin\AppData\Local\Temp\krnl\bin\Monaco\vs\editor\contrib\suggest\media\String_16x.svgimage
MD5:48E754CB54C78A85DCC9AAEA9A27847E
SHA256:D1AA361F33564E8F9D527A01A66C7CE35D73F23417432E80DDF51F562770EE79
2512krnl_bootstrapper_v3.exeC:\Users\admin\AppData\Local\Temp\krnl\bin\Monaco\vs\editor\contrib\suggest\media\String_inverse_16x.svgimage
MD5:6E5C0CE7EC09969F07EA6EE078EF8AD6
SHA256:7D23C0F30CB9C05C81BB15785A3299772AE3CFBE51F3E04895AA1F23FFBEBA5B
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
10
TCP/UDP connections
2
DNS requests
1
Threats
9

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
2512
krnl_bootstrapper_v3.exe
GET
172.67.204.205:8080
http://cdn.krnl.rocks:8080/files/krnl.dll
US
malicious
2512
krnl_bootstrapper_v3.exe
GET
172.67.204.205:8080
http://cdn.krnl.rocks:8080/files/bin/Bunifu_UI_v1.5.3.dll
US
malicious
2512
krnl_bootstrapper_v3.exe
GET
172.67.204.205:8080
http://cdn.krnl.rocks:8080/files/krnlss.exe.config
US
malicious
2512
krnl_bootstrapper_v3.exe
GET
172.67.204.205:8080
http://cdn.krnl.rocks:8080/files/bin/ScintillaNET.dll
US
malicious
2512
krnl_bootstrapper_v3.exe
GET
200
172.67.204.205:8080
http://cdn.krnl.rocks:8080/bootstrapper
US
executable
1.31 Mb
malicious
2512
krnl_bootstrapper_v3.exe
GET
200
172.67.204.205:8080
http://cdn.krnl.rocks:8080/files
US
text
109 b
malicious
2512
krnl_bootstrapper_v3.exe
GET
200
172.67.204.205:8080
http://cdn.krnl.rocks:8080/hashes
US
text
324 b
malicious
2512
krnl_bootstrapper_v3.exe
GET
200
172.67.204.205:8080
http://cdn.krnl.rocks:8080/files/bin/Monaco.zip
US
compressed
641 Kb
malicious
2512
krnl_bootstrapper_v3.exe
GET
200
172.67.204.205:8080
http://cdn.krnl.rocks:8080/files/krnlss.exe
US
executable
1.21 Mb
malicious
2512
krnl_bootstrapper_v3.exe
GET
200
172.67.204.205:8080
http://cdn.krnl.rocks:8080/files/bin/src.7z
US
executable
1.30 Mb
malicious
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID
Process
IP
Domain
ASN
CN
Reputation
2512
krnl_bootstrapper_v3.exe
172.67.204.205:8080
cdn.krnl.rocks
US
malicious

DNS requests

Domain
IP
Reputation
cdn.krnl.rocks
  • 172.67.204.205
  • 104.31.91.85
  • 104.31.90.85
malicious

Threats

PID
Process
Class
Message
2512
krnl_bootstrapper_v3.exe
Potential Corporate Privacy Violation
ET POLICY PE EXE or DLL Windows file download HTTP
2512
krnl_bootstrapper_v3.exe
Potentially Bad Traffic
ET INFO Executable Retrieved With Minimal HTTP Headers - Potential Second Stage Download
2512
krnl_bootstrapper_v3.exe
Misc activity
ET INFO EXE - Served Attached HTTP
2512
krnl_bootstrapper_v3.exe
Potential Corporate Privacy Violation
ET POLICY PE EXE or DLL Windows file download HTTP
2512
krnl_bootstrapper_v3.exe
Potentially Bad Traffic
ET INFO Executable Retrieved With Minimal HTTP Headers - Potential Second Stage Download
2512
krnl_bootstrapper_v3.exe
Misc activity
ET INFO EXE - Served Attached HTTP
2512
krnl_bootstrapper_v3.exe
Misc activity
ET INFO Packed Executable Download
2512
krnl_bootstrapper_v3.exe
Misc activity
ET INFO Packed Executable Download
1 ETPRO signatures available at the full report
No debug info