File name:

EKX36_Client-built.exe

Full analysis: https://app.any.run/tasks/38194443-8f7d-4ce8-8261-b5da5138de37
Verdict: Malicious activity
Threats:

Quasar is a very popular RAT in the world thanks to its code being available in open-source. This malware can be used to control the victim’s computer remotely.

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Analysis date: December 14, 2024, 02:00:41
OS: Windows 10 Professional (build: 19045, 64 bit)
Tags:
quasar
Indicators:
MIME: application/vnd.microsoft.portable-executable
File info: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows, 3 sections
MD5:

7979AF405EC3FC618B94083C15A703F2

SHA1:

A1CEC10272213425B8B5A2310DE229F5962B9674

SHA256:

5CC228520E77D8D98A9737E6ED9E560E7766BEE0D3986593E6D78B3F62254EBF

SSDEEP:

49152:XUEcsT90z2NkvSCmRf7uY1+DVlYZ+hHjGmt/3DgXHIarjLJYSXt8VtOBkzvA0oGf:M2NkKCmRf7uY1+DVlYZ+hHaIDgrBCMG

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

    • Changes the autorun value in the registry

      • Client.exe (PID: 3080)
      • EKX36_Client-built.exe (PID: 4076)

    • QUASAR has been detected (YARA)

      • Client.exe (PID: 3080)

  • SUSPICIOUS

    • Starts itself from another location

      • EKX36_Client-built.exe (PID: 4076)

    • Executable content was dropped or overwritten

      • EKX36_Client-built.exe (PID: 4076)

  • INFO

    • Checks supported languages

      • EKX36_Client-built.exe (PID: 4076)
      • Client.exe (PID: 3080)

    • The process uses the downloaded file

      • Client.exe (PID: 3080)
      • EKX36_Client-built.exe (PID: 4076)

    • Reads the computer name

      • EKX36_Client-built.exe (PID: 4076)
      • Client.exe (PID: 3080)

    • Reads the machine GUID from the registry

      • EKX36_Client-built.exe (PID: 4076)
      • Client.exe (PID: 3080)

    • Creates files or folders in the user directory

      • EKX36_Client-built.exe (PID: 4076)

    • Reads Environment values

      • EKX36_Client-built.exe (PID: 4076)
      • Client.exe (PID: 3080)
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

AssemblyVersion: 1.4.1.0
ProductVersion: 1.4.1
ProductName: Quasar
OriginalFileName: Client.exe
LegalTrademarks: -
LegalCopyright: Copyright © MaxXor 2023
InternalName: Client.exe
FileVersion: 1.4.1
FileDescription: Quasar Client
CompanyName: -
Comments: -
CharacterSet: Unicode
LanguageCode: Neutral
FileSubtype: -
ObjectFileType: Executable application
FileOS: Win32
FileFlags: (none)
FileFlagsMask: 0x003f
ProductVersionNumber: 1.4.1.0
FileVersionNumber: 1.4.1.0
Subsystem: Windows GUI
SubsystemVersion: 4
ImageVersion: -
OSVersion: 4
EntryPoint: 0x31e3fe
UninitializedDataSize: -
InitializedDataSize: 3584
CodeSize: 3261952
LinkerVersion: 8
PEType: PE32
ImageFileCharacteristics: Executable, 32-bit
TimeStamp: 2023:03:12 16:16:39+00:00
MachineType: Intel 386 or later, and compatibles
No data.
screenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
118
Monitored processes
2
Malicious processes
2
Suspicious processes
0

Behavior graph

Click at the process to see the details
start ekx36_client-built.exe #QUASAR client.exe

Process information

PID
CMD
Path
Indicators
Parent process
4076"C:\Users\admin\Desktop\EKX36_Client-built.exe" C:\Users\admin\Desktop\EKX36_Client-built.exe
explorer.exe
User:
admin
Integrity Level:
MEDIUM
Description:
Quasar Client
Exit code:
3
Version:
1.4.1
Modules
Images
c:\users\admin\desktop\ekx36_client-built.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\mscoree.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\apphelp.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
3080"C:\Users\admin\AppData\Roaming\SubDir\Client.exe"C:\Users\admin\AppData\Roaming\SubDir\Client.exe
EKX36_Client-built.exe
User:
admin
Integrity Level:
MEDIUM
Description:
Quasar Client
Version:
1.4.1
Modules
Images
c:\users\admin\appdata\roaming\subdir\client.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\mscoree.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\apphelp.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
Total events
553
Read events
551
Write events
2
Delete events
0

Modification events

(PID) Process:(4076) EKX36_Client-built.exeKey:HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Operation:writeName:Quasar Client Startup
Value:
"C:\Users\admin\AppData\Roaming\SubDir\Client.exe"
(PID) Process:(3080) Client.exeKey:HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Operation:writeName:Quasar Client Startup
Value:
"C:\Users\admin\AppData\Roaming\SubDir\Client.exe"
Executable files
1
Suspicious files
0
Text files
0
Unknown types
0

Dropped files

PID
Process
Filename
Type
4076EKX36_Client-built.exeC:\Users\admin\AppData\Roaming\SubDir\Client.exeexecutable
MD5:7979AF405EC3FC618B94083C15A703F2
SHA256:5CC228520E77D8D98A9737E6ED9E560E7766BEE0D3986593E6D78B3F62254EBF
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
2
TCP/UDP connections
21
DNS requests
7
Threats
0

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
4712
MoUsoCoreWorker.exe
GET
200
2.16.164.106:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl
unknown
—
—
whitelisted
4712
MoUsoCoreWorker.exe
GET
200
95.101.149.131:80
http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl
unknown
—
—
whitelisted
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID
Process
IP
Domain
ASN
CN
Reputation
4712
MoUsoCoreWorker.exe
51.104.136.2:443
—
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
—
—
192.168.100.255:137
—
—
—
whitelisted
—
—
51.104.136.2:443
—
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
—
—
2.23.209.130:443
www.bing.com
Akamai International B.V.
GB
whitelisted
6076
svchost.exe
51.104.136.2:443
—
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
4
System
192.168.100.255:138
—
—
—
whitelisted
4712
MoUsoCoreWorker.exe
2.16.164.106:80
crl.microsoft.com
Akamai International B.V.
NL
whitelisted
—
—
192.168.100.35:49680
—
—
—
unknown
6076
svchost.exe
40.127.240.158:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
4712
MoUsoCoreWorker.exe
95.101.149.131:80
www.microsoft.com
Akamai International B.V.
NL
whitelisted

DNS requests

Domain
IP
Reputation
www.bing.com
  • 2.23.209.130
  • 2.23.209.133
  • 2.23.209.149
  • 2.23.209.187
  • 2.23.209.182
whitelisted
google.com
  • 142.250.186.142
whitelisted
crl.microsoft.com
  • 2.16.164.106
  • 2.16.164.49
whitelisted
settings-win.data.microsoft.com
  • 40.127.240.158
  • 4.231.128.59
whitelisted
www.microsoft.com
  • 95.101.149.131
whitelisted
self.events.data.microsoft.com
  • 104.208.16.88
whitelisted

Threats

No threats detected
No debug info
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Reports
EKX36_Client-built.exe