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download:

major.exe

Full analysis: https://app.any.run/tasks/65287023-d9be-43bd-aef1-79218b9f9c10
Verdict: Malicious activity
Threats:

NanoCore is a Remote Access Trojan or RAT. This malware is highly customizable with plugins which allow attackers to tailor its functionality to their needs. Nanocore is created with the .NET framework and it’s available for purchase for just $25 from its “official” website.

Analysis date: March 31, 2020, 08:38:18
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Tags:
trojan
nanocore
rat
Indicators:
MIME: application/x-dosexec
File info: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows
MD5:

F09BDD7EAE7BBB54C4FBE76C0FDDD85C

SHA1:

96681298DA539415E237DE6B6C3AACCA11387B5D

SHA256:

6FDC8AD458C5B60A15774BAEF1ACFF96AF05216B279754C5188C63EE542A82FE

SSDEEP:

12288:SA5ZPK+ydq2TlnN3awdbxlVZ2t9EbvHM5rRxNSagwxuqD/Z:SA5w+d2TlR1dbxDZ27EjW8VqD/Z

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

      • major.exe (PID: 3368)
    • NANOCORE was detected

      • RegAsm.exe (PID: 1712)
    • Connects to CnC server

      • RegAsm.exe (PID: 1712)
  • SUSPICIOUS

    • Creates files in the user directory

      • RegAsm.exe (PID: 1712)
      • major.exe (PID: 3368)
    • Application launched itself

      • major.exe (PID: 3368)
    • Connects to unusual port

      • RegAsm.exe (PID: 1712)
  • INFO

    No info indicators.
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.) (82.9)
.dll | Win32 Dynamic Link Library (generic) (7.4)
.exe | Win32 Executable (generic) (5.1)
.exe | Generic Win/DOS Executable (2.2)
.exe | DOS Executable Generic (2.2)

EXIF

EXE

MachineType: Intel 386 or later, and compatibles
TimeStamp: 2020:03:30 06:52:22+02:00
PEType: PE32
LinkerVersion: 8
CodeSize: 539648
InitializedDataSize: 66560
UninitializedDataSize: -
EntryPoint: 0x85bde
OSVersion: 4
ImageVersion: -
SubsystemVersion: 4
Subsystem: Windows GUI

Summary

Architecture: IMAGE_FILE_MACHINE_I386
Subsystem: IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date: 30-Mar-2020 04:52:22
Detected languages:
  • English - United States

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: 30-Mar-2020 04:52:22
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
0x00083BE4
0x00083C00
IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
7.87143
.rsrc
0x00086000
0x000101D0
0x00010200
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
4.58779
.reloc
0x00098000
0x0000000C
0x00000200
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ
0.10191

Resources

Title
Entropy
Size
Codepage
Language
Type
0
3.11665
188
Latin 1 / Western European
English - United States
RT_GROUP_ICON
1
2.66021
744
Latin 1 / Western European
English - United States
RT_ICON
2
2.63427
296
Latin 1 / Western European
English - United States
RT_ICON
3
3.87259
3752
Latin 1 / Western European
English - United States
RT_ICON
4
4.59789
2216
Latin 1 / Western European
English - United States
RT_ICON
5
4.98127
1384
Latin 1 / Western European
English - United States
RT_ICON
6
7.91128
13794
Latin 1 / Western European
English - United States
RT_ICON
7
2.60646
16936
Latin 1 / Western European
English - United States
RT_ICON
8
2.81183
9640
Latin 1 / Western European
English - United States
RT_ICON
9
2.76409
6760
Latin 1 / Western European
English - United States
RT_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
37
Monitored processes
4
Malicious processes
2
Suspicious processes
0

Behavior graph

Click at the process to see the details
start major.exe #NANOCORE regasm.exe major.exe no specs regasm.exe no specs

Process information

PID
CMD
Path
Indicators
Parent process
3368"C:\Users\admin\AppData\Local\Temp\major.exe" C:\Users\admin\AppData\Local\Temp\major.exe
explorer.exe
User:
admin
Integrity Level:
MEDIUM
1712"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
major.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Microsoft .NET Assembly Registration Utility
Version:
4.7.3062.0 built by: NET472REL1
3768"C:\Users\admin\AppData\Local\Temp\major.exe" C:\Users\admin\AppData\Local\Temp\major.exemajor.exe
User:
admin
Integrity Level:
MEDIUM
2876"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exemajor.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Microsoft .NET Assembly Registration Utility
Exit code:
0
Version:
4.7.3062.0 built by: NET472REL1
Total events
406
Read events
402
Write events
4
Delete events
0

Modification events

(PID) Process:(3368) major.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:UNCAsIntranet
Value:
0
(PID) Process:(3368) major.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:AutoDetect
Value:
1
Executable files
0
Suspicious files
0
Text files
1
Unknown types
0

Dropped files

PID
Process
Filename
Type
1712RegAsm.exeC:\Users\admin\AppData\Roaming\90059C37-1320-41A4-B58D-2B75A9850D2F\run.dattext
MD5:51DD210171F03DEA7BDDF5A2A1E97D5B
SHA256:2635066D7E2A5A74387A22FEE7F72300B379EA567CE4175235FBB4BADA76B78D
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
0
TCP/UDP connections
16
DNS requests
6
Threats
0

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
1712
RegAsm.exe
8.8.8.8:53
Google Inc.
US
whitelisted
1712
RegAsm.exe
185.244.30.251:1122
malicious
1712
RegAsm.exe
192.169.69.25:1122
meeti.duckdns.org
Wowrack.com
US
malicious

DNS requests

Domain
IP
Reputation
meeti.duckdns.org
  • 192.169.69.25
malicious

Threats

PID
Process
Class
Message
1712
RegAsm.exe
Misc activity
ET INFO DYNAMIC_DNS Query to *.duckdns. Domain
1712
RegAsm.exe
A Network Trojan was detected
ET TROJAN Possible NanoCore C2 60B
1712
RegAsm.exe
Misc activity
ET INFO DYNAMIC_DNS Query to *.duckdns. Domain
1712
RegAsm.exe
Misc activity
ET INFO DYNAMIC_DNS Query to *.duckdns. Domain
1712
RegAsm.exe
A Network Trojan was detected
ET TROJAN Possible NanoCore C2 60B
1712
RegAsm.exe
Misc activity
ET INFO DYNAMIC_DNS Query to *.duckdns. Domain
1712
RegAsm.exe
A Network Trojan was detected
ET TROJAN Possible NanoCore C2 60B
1712
RegAsm.exe
Misc activity
ET INFO DYNAMIC_DNS Query to *.duckdns. Domain
1712
RegAsm.exe
A Network Trojan was detected
ET TROJAN Possible NanoCore C2 60B
1712
RegAsm.exe
Misc activity
ET INFO DYNAMIC_DNS Query to *.duckdns. Domain
No debug info