download:

/zvxp/Klar-loader/raw/main/Klar%20loader/Klar%20loader.exe

Full analysis: https://app.any.run/tasks/bf83de1f-643a-405d-b104-3cd0019c8f68
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: August 17, 2024, 14:54:34
OS: Windows 10 Professional (build: 19045, 64 bit)
Tags:
quasar
Indicators:
MIME: application/x-dosexec
File info: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows
MD5:

AE6D5208601B1F635017F2EA8F151EF4

SHA1:

B31803053FC59C1994A995B8059DCBEA3D3B55DC

SHA256:

C4C69FF64725AD0D0B954E01F7614DA4CA484A40A627A45A44313972483D27F4

SSDEEP:

49152:TfEcsT90z2NkvSCmRf7uY1+DVlYZ+hHjGmt/3DgLVe9XWKjInbAGhPig1rAxAQAX:32NkKCmRf7uY1+DVlYZ+hHaIDgEAhHN

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

      • bf83de1f-643a-405d-b104-3cd0019c8f68.exe (PID: 6416)
      • Klar Loader.exe (PID: 6448)

    • QUASAR has been detected (YARA)

      • Klar Loader.exe (PID: 6448)

  • SUSPICIOUS

    • Drops the executable file immediately after the start

      • bf83de1f-643a-405d-b104-3cd0019c8f68.exe (PID: 6416)

    • Executable content was dropped or overwritten

      • bf83de1f-643a-405d-b104-3cd0019c8f68.exe (PID: 6416)

    • Starts itself from another location

      • bf83de1f-643a-405d-b104-3cd0019c8f68.exe (PID: 6416)

    • Potential Corporate Privacy Violation

      • svchost.exe (PID: 2256)

    • Connects to unusual port

      • Klar Loader.exe (PID: 6448)

  • INFO

    • Reads the computer name

      • bf83de1f-643a-405d-b104-3cd0019c8f68.exe (PID: 6416)
      • Klar Loader.exe (PID: 6448)

    • Checks supported languages

      • bf83de1f-643a-405d-b104-3cd0019c8f68.exe (PID: 6416)
      • Klar Loader.exe (PID: 6448)

    • Reads Environment values

      • bf83de1f-643a-405d-b104-3cd0019c8f68.exe (PID: 6416)
      • Klar Loader.exe (PID: 6448)

    • Reads the machine GUID from the registry

      • bf83de1f-643a-405d-b104-3cd0019c8f68.exe (PID: 6416)
      • Klar Loader.exe (PID: 6448)

    • Creates files or folders in the user directory

      • bf83de1f-643a-405d-b104-3cd0019c8f68.exe (PID: 6416)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report

Quasar

(PID) Process(6448) Klar Loader.exe
Version1.4.1
C2 (2)10m-37682.portmap.host:37682
Sub_DirSubDir
Install_NameKlar Loader.exe
Mutex4e8e5a98-1c03-4809-aa29-c0b2f7d2fdce
StartupQuasar Client Startup
Tagzvxp
LogDirLogs
SignatureYGe/oy9sSwmw+FE5fWZ3/VIr5TkfwGPesjiGHzF2/szQ9opkZF3MilO26lt5vkzYScIj0xhpqHPwec0o1UQvkgaxpYA7eueIu+tq6Z8+6xwOlB6HVTEejn/JgCcM3hey5RMjudoDOgmy4yQyhELyd4PeTgx3r2XAF/mk2LDT2IsXx5tH4svH6PElRC9/H8fuGOyN7b7OIQ3KHIP4kjtpHTUfQ0MJoN0rWYGZGkSvrXUgx1BWQIxDF+RGk0d1kzvOLd940TNJjspJBEuyv9wPUp/SXUin9ywQld9YC2pPrpu8...
CertificateMIIE9DCCAtygAwIBAgIQALHFtyVUrhh9LDwlNHqXGTANBgkqhkiG9w0BAQ0FADAbMRkwFwYDVQQDDBBRdWFzYXIgU2VydmVyIENBMCAXDTI0MDgwNjEwMDAwM1oYDzk5OTkxMjMxMjM1OTU5WjAbMRkwFwYDVQQDDBBRdWFzYXIgU2VydmVyIENBMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAjR6XTplmOHBASH02RTckKNoQp9Y1t4CSifjrAF8gCCxinXtGKAAmn2m+boRsjEP76wEknj/p...
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: 3261952
InitializedDataSize: 3584
UninitializedDataSize: -
EntryPoint: 0x31e3fe
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.
screenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
127
Monitored processes
3
Malicious processes
2
Suspicious processes
0

Behavior graph

Click at the process to see the details
start bf83de1f-643a-405d-b104-3cd0019c8f68.exe #QUASAR klar loader.exe svchost.exe

Process information

PID
CMD
Path
Indicators
Parent process
2256C:\WINDOWS\system32\svchost.exe -k NetworkService -p -s DnscacheC:\Windows\System32\svchost.exe
services.exe
User:
NETWORK SERVICE
Company:
Microsoft Corporation
Integrity Level:
SYSTEM
Description:
Host Process for Windows Services
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\svchost.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\bcrypt.dll
c:\windows\system32\ucrtbase.dll
c:\windows\system32\combase.dll
c:\windows\system32\kernel.appcore.dll
6416"C:\Users\admin\Desktop\bf83de1f-643a-405d-b104-3cd0019c8f68.exe" C:\Users\admin\Desktop\bf83de1f-643a-405d-b104-3cd0019c8f68.exe
explorer.exe
User:
admin
Integrity Level:
MEDIUM
Description:
Quasar Client
Exit code:
3
Version:
1.4.1
Modules
Images
c:\users\admin\desktop\bf83de1f-643a-405d-b104-3cd0019c8f68.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
6448"C:\Users\admin\AppData\Roaming\SubDir\Klar Loader.exe"C:\Users\admin\AppData\Roaming\SubDir\Klar Loader.exe
bf83de1f-643a-405d-b104-3cd0019c8f68.exe
User:
admin
Integrity Level:
MEDIUM
Description:
Quasar Client
Version:
1.4.1
Modules
Images
c:\users\admin\appdata\roaming\subdir\klar loader.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(6448) Klar Loader.exe
Version1.4.1
C2 (2)10m-37682.portmap.host:37682
Sub_DirSubDir
Install_NameKlar Loader.exe
Mutex4e8e5a98-1c03-4809-aa29-c0b2f7d2fdce
StartupQuasar Client Startup
Tagzvxp
LogDirLogs
SignatureYGe/oy9sSwmw+FE5fWZ3/VIr5TkfwGPesjiGHzF2/szQ9opkZF3MilO26lt5vkzYScIj0xhpqHPwec0o1UQvkgaxpYA7eueIu+tq6Z8+6xwOlB6HVTEejn/JgCcM3hey5RMjudoDOgmy4yQyhELyd4PeTgx3r2XAF/mk2LDT2IsXx5tH4svH6PElRC9/H8fuGOyN7b7OIQ3KHIP4kjtpHTUfQ0MJoN0rWYGZGkSvrXUgx1BWQIxDF+RGk0d1kzvOLd940TNJjspJBEuyv9wPUp/SXUin9ywQld9YC2pPrpu8...
CertificateMIIE9DCCAtygAwIBAgIQALHFtyVUrhh9LDwlNHqXGTANBgkqhkiG9w0BAQ0FADAbMRkwFwYDVQQDDBBRdWFzYXIgU2VydmVyIENBMCAXDTI0MDgwNjEwMDAwM1oYDzk5OTkxMjMxMjM1OTU5WjAbMRkwFwYDVQQDDBBRdWFzYXIgU2VydmVyIENBMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAjR6XTplmOHBASH02RTckKNoQp9Y1t4CSifjrAF8gCCxinXtGKAAmn2m+boRsjEP76wEknj/p...
Total events
1 091
Read events
1 089
Write events
2
Delete events
0

Modification events

(PID) Process:(6416) bf83de1f-643a-405d-b104-3cd0019c8f68.exeKey:HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Operation:writeName:Quasar Client Startup
Value:
"C:\Users\admin\AppData\Roaming\SubDir\Klar Loader.exe"
(PID) Process:(6448) Klar Loader.exeKey:HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Operation:writeName:Quasar Client Startup
Value:
"C:\Users\admin\AppData\Roaming\SubDir\Klar Loader.exe"
Executable files
1
Suspicious files
0
Text files
0
Unknown types
0

Dropped files

PID
Process
Filename
Type
6416bf83de1f-643a-405d-b104-3cd0019c8f68.exeC:\Users\admin\AppData\Roaming\SubDir\Klar Loader.exeexecutable
MD5:AE6D5208601B1F635017F2EA8F151EF4
SHA256:C4C69FF64725AD0D0B954E01F7614DA4CA484A40A627A45A44313972483D27F4
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
3
TCP/UDP connections
60
DNS requests
15
Threats
2

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
2208
svchost.exe
GET
200
192.229.221.95:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D
unknown
—
—
whitelisted
6736
backgroundTaskHost.exe
GET
200
192.229.221.95:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEAn5bsKVVV8kdJ6vHl3O1J0%3D
unknown
—
—
whitelisted
3900
SIHClient.exe
GET
200
95.101.149.131:80
http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.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
1920
svchost.exe
40.127.240.158:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
unknown
3888
svchost.exe
239.255.255.250:1900
—
—
—
whitelisted
2804
RUXIMICS.exe
40.127.240.158:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
unknown
2120
MoUsoCoreWorker.exe
40.127.240.158:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
unknown
6448
Klar Loader.exe
193.161.193.99:37682
10m-37682.portmap.host
OOO Bitree Networks
RU
malicious
1920
svchost.exe
51.104.136.2:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
3260
svchost.exe
40.113.103.199:443
client.wns.windows.com
MICROSOFT-CORP-MSN-AS-BLOCK
NL
whitelisted
2208
svchost.exe
40.126.32.74:443
login.live.com
MICROSOFT-CORP-MSN-AS-BLOCK
NL
whitelisted
2208
svchost.exe
192.229.221.95:80
ocsp.digicert.com
EDGECAST
US
whitelisted
2120
MoUsoCoreWorker.exe
4.231.128.59:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted

DNS requests

Domain
IP
Reputation
settings-win.data.microsoft.com
  • 40.127.240.158
  • 51.104.136.2
  • 4.231.128.59
whitelisted
google.com
  • 216.58.212.174
whitelisted
10m-37682.portmap.host
  • 193.161.193.99
malicious
client.wns.windows.com
  • 40.113.103.199
whitelisted
login.live.com
  • 40.126.32.74
  • 20.190.160.20
  • 20.190.160.22
  • 40.126.32.133
  • 40.126.32.76
  • 20.190.160.17
  • 40.126.32.136
  • 20.190.160.14
whitelisted
ocsp.digicert.com
  • 192.229.221.95
whitelisted
arc.msn.com
  • 20.74.47.205
whitelisted
slscr.update.microsoft.com
  • 20.12.23.50
whitelisted
www.microsoft.com
  • 95.101.149.131
whitelisted
fe3cr.delivery.mp.microsoft.com
  • 20.242.39.171
whitelisted

Threats

PID
Process
Class
Message
2256
svchost.exe
Misc activity
ET INFO DNS Query for Port Mapping/Tunneling Service Domain (.portmap .host)
2256
svchost.exe
Potential Corporate Privacy Violation
ET POLICY DNS Query to a Reverse Proxy Service Observed
No debug info
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Reports
/zvxp/Klar-loader/raw/main/Klar%20loader/Klar%20loader.exe