File name:

4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe

Full analysis: https://app.any.run/tasks/d6338dce-cf50-4bb8-a7bd-5feb5931d54b
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: December 14, 2024, 03:39:13
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:

B67F56E12C03B65821EB83A0D64CC7F1

SHA1:

7F482ECB55A7193DC5E0003A5DD4B0E7748D6DCA

SHA256:

4FC8B57C9D43BCBE84F7AF983E69BC6ACAC7BA75C3DC85071F622EA0E827739E

SSDEEP:

98304:L2NkKCmRf7uY1+DVlYZ+hHaIDg13dDEX:xXgP

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: 4320)
      • 4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe (PID: 2216)

    • QUASAR has been detected (YARA)

      • Client.exe (PID: 4320)

  • SUSPICIOUS

    • Starts itself from another location

      • 4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe (PID: 2216)

    • Connects to FTP

      • Client.exe (PID: 4320)

    • Executable content was dropped or overwritten

      • 4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe (PID: 2216)

  • INFO

    • Creates files or folders in the user directory

      • 4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe (PID: 2216)

    • Reads Environment values

      • 4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe (PID: 2216)
      • Client.exe (PID: 4320)

    • Reads the machine GUID from the registry

      • Client.exe (PID: 4320)
      • 4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe (PID: 2216)

    • The process uses the downloaded file

      • 4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe (PID: 2216)
      • Client.exe (PID: 4320)

    • Checks supported languages

      • Client.exe (PID: 4320)
      • 4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe (PID: 2216)

    • Reads the computer name

      • Client.exe (PID: 4320)
      • 4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe (PID: 2216)
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.) (63.1)
.exe | Win64 Executable (generic) (23.8)
.dll | Win32 Dynamic Link Library (generic) (5.6)
.exe | Win32 Executable (generic) (3.8)
.exe | Generic Win/DOS Executable (1.7)

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: 273920
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
120
Monitored processes
2
Malicious processes
2
Suspicious processes
0

Behavior graph

Click at the process to see the details
start 4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe #QUASAR client.exe

Process information

PID
CMD
Path
Indicators
Parent process
2216"C:\Users\admin\Desktop\4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe" C:\Users\admin\Desktop\4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe
explorer.exe
User:
admin
Integrity Level:
MEDIUM
Description:
Quasar Client
Exit code:
3
Version:
1.4.1
Modules
Images
c:\users\admin\desktop\4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.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
4320"C:\Users\admin\AppData\Roaming\SubDir\Client.exe"C:\Users\admin\AppData\Roaming\SubDir\Client.exe
4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.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:(2216) 4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.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:(4320) 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
22164fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exeC:\Users\admin\AppData\Roaming\SubDir\Client.exeexecutable
MD5:B67F56E12C03B65821EB83A0D64CC7F1
SHA256:4FC8B57C9D43BCBE84F7AF983E69BC6ACAC7BA75C3DC85071F622EA0E827739E
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
6
TCP/UDP connections
24
DNS requests
7
Threats
0

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
2736
svchost.exe
GET
200
23.53.40.176:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl
unknown
—
—
whitelisted
2736
svchost.exe
GET
200
184.30.21.171:80
http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl
unknown
—
—
whitelisted
1540
RUXIMICS.exe
GET
200
184.30.21.171:80
http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl
unknown
—
—
whitelisted
4712
MoUsoCoreWorker.exe
GET
200
184.30.21.171:80
http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl
unknown
—
—
whitelisted
4712
MoUsoCoreWorker.exe
GET
200
23.53.40.176:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl
unknown
—
—
whitelisted
1540
RUXIMICS.exe
GET
200
23.53.40.176:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.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
1540
RUXIMICS.exe
51.104.136.2:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
—
—
192.168.100.255:137
—
—
—
whitelisted
4712
MoUsoCoreWorker.exe
51.104.136.2:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
2736
svchost.exe
51.104.136.2:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
—
—
104.126.37.145:443
www.bing.com
Akamai International B.V.
DE
whitelisted
4
System
192.168.100.255:138
—
—
—
whitelisted
4320
Client.exe
98.51.190.130:20
—
COMCAST-7922
US
malicious
4712
MoUsoCoreWorker.exe
23.53.40.176:80
crl.microsoft.com
Akamai International B.V.
DE
whitelisted
1540
RUXIMICS.exe
23.53.40.176:80
crl.microsoft.com
Akamai International B.V.
DE
whitelisted
2736
svchost.exe
23.53.40.176:80
crl.microsoft.com
Akamai International B.V.
DE
whitelisted

DNS requests

Domain
IP
Reputation
settings-win.data.microsoft.com
  • 51.104.136.2
  • 4.231.128.59
whitelisted
www.bing.com
  • 104.126.37.145
  • 104.126.37.131
whitelisted
google.com
  • 216.58.212.174
whitelisted
crl.microsoft.com
  • 23.53.40.176
  • 23.53.40.178
whitelisted
www.microsoft.com
  • 184.30.21.171
whitelisted
self.events.data.microsoft.com
  • 13.89.178.27
whitelisted

Threats

No threats detected
No debug info
Interactive malware hunting service ANY.RUN
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Reports
4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe