File name:

winlogon.exe

Full analysis: https://app.any.run/tasks/41447a6f-dd70-4e01-b303-7d26fdd21d8d
Verdict: Malicious activity
Threats:

njRAT is a remote access trojan. It is one of the most widely accessible RATs on the market that features an abundance of educational information. Interested attackers can even find tutorials on YouTube. This allows it to become one of the most popular RATs in the world.

Malware Trends Tracker     >>>
Analysis date: January 29, 2022, 16:11:06
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Tags:
rat
njrat
bladabindi
Indicators:
MIME: application/x-dosexec
File info: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows
MD5:

4F2E02B04F971DD65C25A3AF3C237442

SHA1:

C631EB6DEBF54AC44548B80A05EF1489D0B2CBF2

SHA256:

8988AB0FD22BE9157E24B001E10C1E025CCB52DC7A7B2D2768EAF8F70E5A3CDE

SSDEEP:

384:fSNSTVizSvz/DlLmfm9o4siVh52jGm9iwO5FPIOWTkEBlDkodg9TdFpyFEIGsJjx:aW64h5Dw6iiouDbEEIGfRK+f

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

    • Writes to a start menu file

      • System32.exe (PID: 2900)

    • NJRAT was detected

      • System32.exe (PID: 2900)

    • Changes the autorun value in the registry

      • System32.exe (PID: 2900)

  • SUSPICIOUS

    • Reads the computer name

      • winlogon.exe (PID: 1252)
      • System32.exe (PID: 2900)

    • Drops a file with a compile date too recent

      • winlogon.exe (PID: 1252)
      • System32.exe (PID: 2900)

    • Executable content was dropped or overwritten

      • winlogon.exe (PID: 1252)
      • System32.exe (PID: 2900)

    • Checks supported languages

      • winlogon.exe (PID: 1252)
      • System32.exe (PID: 2900)

    • Starts itself from another location

      • winlogon.exe (PID: 1252)

    • Uses NETSH.EXE for network configuration

      • System32.exe (PID: 2900)

    • Reads Environment values

      • netsh.exe (PID: 876)
      • System32.exe (PID: 2900)

    • Creates files in the user directory

      • System32.exe (PID: 2900)

  • INFO

    • Reads the computer name

      • netsh.exe (PID: 876)

    • Checks supported languages

      • netsh.exe (PID: 876)
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.) (56.7)
.exe | Win64 Executable (generic) (21.3)
.scr | Windows screen saver (10.1)
.dll | Win32 Dynamic Link Library (generic) (5)
.exe | Win32 Executable (generic) (3.4)

EXIF

EXE

Subsystem: Windows GUI
SubsystemVersion: 4
ImageVersion: -
OSVersion: 4
EntryPoint: 0x97be
UninitializedDataSize: -
InitializedDataSize: 1536
CodeSize: 30720
LinkerVersion: 8
PEType: PE32
TimeStamp: 2022:01:29 17:10:53+01:00
MachineType: Intel 386 or later, and compatibles

Summary

Architecture: IMAGE_FILE_MACHINE_I386
Subsystem: IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date: 29-Jan-2022 16:10:53

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: 29-Jan-2022 16:10:53
Pointer to Symbol Table: 0x00000000
Number of symbols: 0
Size of Optional Header: 0x00E0
Characteristics:
  • IMAGE_FILE_32BIT_MACHINE
  • IMAGE_FILE_EXECUTABLE_IMAGE

Sections

Name
Virtual Address
Virtual Size
Raw Size
Charateristics
Entropy
.text
0x00002000
0x000077C4
0x00007800
IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
5.67129
.rsrc
0x0000A000
0x00000240
0x00000400
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
4.96877
.reloc
0x0000C000
0x0000000C
0x00000200
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ
0.0815394

Resources

Title
Entropy
Size
Codepage
Language
Type
1
4.96801
487
Latin 1 / Western European
UNKNOWN
RT_MANIFEST

Imports

mscoree.dll
No data.
screenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
37
Monitored processes
3
Malicious processes
1
Suspicious processes
0

Behavior graph

Click at the process to see the details
drop and start start winlogon.exe #NJRAT system32.exe netsh.exe no specs

Process information

PID
CMD
Path
Indicators
Parent process
876netsh firewall add allowedprogram "C:\Users\admin\AppData\Local\Temp\System32.exe" "System32.exe" ENABLEC:\Windows\system32\netsh.exe—System32.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Network Command Shell
Exit code:
1
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\netsh.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\credui.dll
c:\windows\system32\user32.dll
1252"C:\Users\admin\AppData\Local\Temp\winlogon.exe" C:\Users\admin\AppData\Local\Temp\winlogon.exe
Explorer.EXE
User:
admin
Integrity Level:
MEDIUM
Exit code:
0
Modules
Images
c:\users\admin\appdata\local\temp\winlogon.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
2900"C:\Users\admin\AppData\Local\Temp\System32.exe" C:\Users\admin\AppData\Local\Temp\System32.exe
winlogon.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
0
Modules
Images
c:\users\admin\appdata\local\temp\system32.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\system32\shlwapi.dll
Total events
2 329
Read events
1 951
Write events
378
Delete events
0

Modification events

(PID) Process:(1252) winlogon.exeKey:HKEY_CURRENT_USER
Operation:writeName:di
Value:
!
(PID) Process:(1252) winlogon.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:ProxyBypass
Value:
1
(PID) Process:(1252) winlogon.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:IntranetName
Value:
1
(PID) Process:(1252) winlogon.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:UNCAsIntranet
Value:
1
(PID) Process:(1252) winlogon.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:AutoDetect
Value:
0
(PID) Process:(2900) System32.exeKey:HKEY_CURRENT_USER
Operation:writeName:di
Value:
!
(PID) Process:(2900) System32.exeKey:HKEY_CURRENT_USER\Environment
Operation:writeName:SEE_MASK_NOZONECHECKS
Value:
1
(PID) Process:(2900) System32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
Operation:writeName:11c87df1822ffea289460732102015bc
Value:
"C:\Users\admin\AppData\Local\Temp\System32.exe" ..
(PID) Process:(876) netsh.exeKey:HKEY_CLASSES_ROOT\Local Settings\MuiCache\16C\52C64B7E
Operation:writeName:LanguageList
Value:
en-US
(PID) Process:(876) netsh.exeKey:HKEY_CLASSES_ROOT\Local Settings\MuiCache\16C\52C64B7E
Operation:writeName:@%SystemRoot%\system32\dhcpqec.dll,-100
Value:
DHCP Quarantine Enforcement Client
Executable files
2
Suspicious files
0
Text files
0
Unknown types
0

Dropped files

PID
Process
Filename
Type
1252winlogon.exeC:\Users\admin\AppData\Local\Temp\System32.exeexecutable
MD5:—
SHA256:—
2900System32.exeC:\Users\admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\11c87df1822ffea289460732102015bc.exeexecutable
MD5:—
SHA256:—
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
0
TCP/UDP connections
181
DNS requests
6
Threats
5

HTTP requests

No HTTP requests
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID
Process
IP
Domain
ASN
CN
Reputation
2900
System32.exe
185.186.143.51:5553
maykov.ddns.net
Business Consulting LLC
RU
unknown
—
—
185.186.143.51:5553
maykov.ddns.net
Business Consulting LLC
RU
unknown

DNS requests

Domain
IP
Reputation
maykov.ddns.net
  • 185.186.143.51
malicious
dns.msftncsi.com
  • 131.107.255.255
shared

Threats

PID
Process
Class
Message
—
—
Potentially Bad Traffic
ET POLICY DNS Query to DynDNS Domain *.ddns .net
—
—
Potentially Bad Traffic
ET POLICY DNS Query to DynDNS Domain *.ddns .net
—
—
Potentially Bad Traffic
ET POLICY DNS Query to DynDNS Domain *.ddns .net
—
—
Potentially Bad Traffic
ET POLICY DNS Query to DynDNS Domain *.ddns .net
—
—
Potentially Bad Traffic
ET POLICY DNS Query to DynDNS Domain *.ddns .net
No debug info
Interactive malware hunting service ANY.RUN
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Reports
winlogon.exe