File name:

Client-built.exe

Full analysis: https://app.any.run/tasks/2582b434-7991-4292-8e1c-92932f2e3b2a
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.

Malware Trends Tracker     >>>
Analysis date: March 24, 2025, 11:57:37
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:

621755714A193B4D557C2477C185A080

SHA1:

0FA113B4EE92A92274D85EF8B5BCCCED70F96B74

SHA256:

DE5FDD1C4EAB3B2AC4281B03FC7A1B24BD815F6B12BCE909755FE2738AB94C44

SSDEEP:

98304:M2nP6q3A6770DODdl/rADxRLDgRWSZfy:LUgj

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-built.exe (PID: 5056)
      • Client.exe (PID: 4896)

    • QUASAR has been detected (YARA)

      • Client.exe (PID: 4896)

  • SUSPICIOUS

    • Starts itself from another location

      • Client-built.exe (PID: 5056)

    • Executable content was dropped or overwritten

      • Client-built.exe (PID: 5056)

    • Connects to unusual port

      • Client.exe (PID: 4896)

    • There is functionality for taking screenshot (YARA)

      • Client.exe (PID: 4896)

  • INFO

    • Checks supported languages

      • Client-built.exe (PID: 5056)
      • Client.exe (PID: 4896)

    • Reads Environment values

      • Client-built.exe (PID: 5056)
      • Client.exe (PID: 4896)

    • Reads the computer name

      • Client-built.exe (PID: 5056)
      • Client.exe (PID: 4896)

    • Creates files or folders in the user directory

      • Client-built.exe (PID: 5056)

    • Reads the machine GUID from the registry

      • Client-built.exe (PID: 5056)
      • Client.exe (PID: 4896)

    • Reads the software policy settings

      • slui.exe (PID: 4696)

    • Checks proxy server information

      • slui.exe (PID: 4696)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report

Quasar

(PID) Process(4896) Client.exe
Version1.4.1
C2 (2)10.0.2.15:4782
Sub_DirSubDir
Install_NameClient.exe
Mutexe5b62a3f-1d76-4ce3-b145-c4738e342ae6
StartupQuasar Client Startup
TagOffice04
LogDirLogs
SignatureUDl/lD7DuiNrxDjr25g1kvficNzHINj+k9hXzhjG+f9UD6BYHScc1ZzWlByzf3eG2NS9GTSUJ8Pkrz+8SuOwCLP+BabXPhuxrNX9c7Jh42eZVzGhQYAC6YDhU8/ey2KABxn79ew47KOYizzAOHSTIw6S2DHJ+sTaYK6EmudjADsNSq8jkfMpQs7d3ea5b6OtLHbhRjPPTdnFUfByj92DmwdiGOB+Pt+Ep7UbjtyUpF/wzxGlJwMCwJtKqWG9F1K1C7eVsDTGj1uLtBbg/71mapwNns9EvKrK6aDw51MoaVzk...
CertificateMIIE9DCCAtygAwIBAgIQANlRbekO8BcO1zcoyoqaRTANBgkqhkiG9w0BAQ0FADAbMRkwFwYDVQQDDBBRdWFzYXIgU2VydmVyIENBMCAXDTI1MDMxODE4MjgxMloYDzk5OTkxMjMxMjM1OTU5WjAbMRkwFwYDVQQDDBBRdWFzYXIgU2VydmVyIENBMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAodqQ3boGHMYHXlu64TeXAn13eUfEnOm1tR11lItb1UNtCeg0wnqkhnaJ3l0Is4zUoLklrPNt...
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

MachineType: Intel 386 or later, and compatibles
TimeStamp: 2023:03:12 16:16:39+00:00
ImageFileCharacteristics: Executable, 32-bit
PEType: PE32
LinkerVersion: 8
CodeSize: 3261440
InitializedDataSize: 3584
UninitializedDataSize: -
EntryPoint: 0x31e3ce
OSVersion: 4
ImageVersion: -
SubsystemVersion: 4
Subsystem: Windows GUI
FileVersionNumber: 1.4.1.0
ProductVersionNumber: 1.4.1.0
FileFlagsMask: 0x003f
FileFlags: (none)
FileOS: Win32
ObjectFileType: Executable application
FileSubtype: -
LanguageCode: Neutral
CharacterSet: Unicode
Comments: -
CompanyName: -
FileDescription: Quasar Client
FileVersion: 1.4.1
InternalName: Client.exe
LegalCopyright: Copyright © MaxXor 2023
LegalTrademarks: -
OriginalFileName: Client.exe
ProductName: Quasar
ProductVersion: 1.4.1
AssemblyVersion: 1.4.1.0
No data.
screenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
124
Monitored processes
3
Malicious processes
2
Suspicious processes
0

Behavior graph

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

Process information

PID
CMD
Path
Indicators
Parent process
4696C:\WINDOWS\System32\slui.exe -EmbeddingC:\Windows\System32\slui.exe
svchost.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows Activation Client
Exit code:
0
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\slui.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\bcrypt.dll
c:\windows\system32\user32.dll
4896"C:\Users\admin\AppData\Roaming\SubDir\Client.exe"C:\Users\admin\AppData\Roaming\SubDir\Client.exe
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
Quasar
(PID) Process(4896) Client.exe
Version1.4.1
C2 (2)10.0.2.15:4782
Sub_DirSubDir
Install_NameClient.exe
Mutexe5b62a3f-1d76-4ce3-b145-c4738e342ae6
StartupQuasar Client Startup
TagOffice04
LogDirLogs
SignatureUDl/lD7DuiNrxDjr25g1kvficNzHINj+k9hXzhjG+f9UD6BYHScc1ZzWlByzf3eG2NS9GTSUJ8Pkrz+8SuOwCLP+BabXPhuxrNX9c7Jh42eZVzGhQYAC6YDhU8/ey2KABxn79ew47KOYizzAOHSTIw6S2DHJ+sTaYK6EmudjADsNSq8jkfMpQs7d3ea5b6OtLHbhRjPPTdnFUfByj92DmwdiGOB+Pt+Ep7UbjtyUpF/wzxGlJwMCwJtKqWG9F1K1C7eVsDTGj1uLtBbg/71mapwNns9EvKrK6aDw51MoaVzk...
CertificateMIIE9DCCAtygAwIBAgIQANlRbekO8BcO1zcoyoqaRTANBgkqhkiG9w0BAQ0FADAbMRkwFwYDVQQDDBBRdWFzYXIgU2VydmVyIENBMCAXDTI1MDMxODE4MjgxMloYDzk5OTkxMjMxMjM1OTU5WjAbMRkwFwYDVQQDDBBRdWFzYXIgU2VydmVyIENBMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAodqQ3boGHMYHXlu64TeXAn13eUfEnOm1tR11lItb1UNtCeg0wnqkhnaJ3l0Is4zUoLklrPNt...
5056"C:\Users\admin\Desktop\Client-built.exe" C:\Users\admin\Desktop\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\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
Total events
3 911
Read events
3 909
Write events
2
Delete events
0

Modification events

(PID) Process:(5056) 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:(4896) 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
5056Client-built.exeC:\Users\admin\AppData\Roaming\SubDir\Client.exeexecutable
MD5:621755714A193B4D557C2477C185A080
SHA256:DE5FDD1C4EAB3B2AC4281B03FC7A1B24BD815F6B12BCE909755FE2738AB94C44
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
3
TCP/UDP connections
23
DNS requests
6
Threats
0

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
2104
svchost.exe
GET
200
23.48.23.176:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl
unknown
—
—
whitelisted
—
—
POST
500
40.91.76.224:443
https://activation-v2.sls.microsoft.com/SLActivateProduct/SLActivateProduct.asmx?configextension=Retail
unknown
xml
512 b
whitelisted
—
—
POST
500
40.91.76.224:443
https://activation-v2.sls.microsoft.com/SLActivateProduct/SLActivateProduct.asmx?configextension=Retail
unknown
xml
512 b
whitelisted
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID
Process
IP
Domain
ASN
CN
Reputation
4
System
192.168.100.255:137
—
—
—
whitelisted
—
—
20.73.194.208:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
NL
whitelisted
2104
svchost.exe
20.73.194.208:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
NL
whitelisted
4
System
192.168.100.255:138
—
—
—
whitelisted
2104
svchost.exe
23.48.23.176:80
crl.microsoft.com
Akamai International B.V.
DE
whitelisted
4896
Client.exe
10.0.2.15:4782
—
—
—
unknown
5960
slui.exe
40.91.76.224:443
activation-v2.sls.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
US
whitelisted
4696
slui.exe
40.91.76.224:443
activation-v2.sls.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
US
whitelisted

DNS requests

Domain
IP
Reputation
settings-win.data.microsoft.com
  • 20.73.194.208
whitelisted
google.com
  • 142.250.186.78
whitelisted
crl.microsoft.com
  • 23.48.23.176
  • 23.48.23.139
  • 23.48.23.179
  • 23.48.23.137
  • 23.48.23.138
  • 23.48.23.190
  • 23.48.23.178
  • 23.48.23.169
  • 23.48.23.193
whitelisted
activation-v2.sls.microsoft.com
  • 40.91.76.224
whitelisted

Threats

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