File name:

a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.exe

Full analysis: https://app.any.run/tasks/8bf58875-6da7-4d8e-8166-e4729149cf41
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, 12:23:37
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:

94222631EF1071A4F7CEB180CF8A4A5A

SHA1:

786D8B2D8B931A9282EE54367D2DDA501F1CA946

SHA256:

A45B373B780F5B9FCF5C51473C69BBF0ED650F300523097602B35F5222BD122B

SSDEEP:

49152:v+gGOhX02hD2nPiLq3A6770DODdl/rADxXhCk/3DgtvNVtEhI/fsbWVzqhLoGd+H:92nP6q3A6770DODdl/rADxRLDgqWkC

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

      • a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.exe (PID: 5400)
      • Client.exe (PID: 188)

    • QUASAR has been detected (YARA)

      • Client.exe (PID: 188)

  • SUSPICIOUS

    • Starts itself from another location

      • a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.exe (PID: 5400)

    • Executable content was dropped or overwritten

      • a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.exe (PID: 5400)

    • Reads security settings of Internet Explorer

      • Client.exe (PID: 188)

    • Connects to unusual port

      • Client.exe (PID: 188)

  • INFO

    • Creates files or folders in the user directory

      • a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.exe (PID: 5400)

    • Checks supported languages

      • a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.exe (PID: 5400)
      • Client.exe (PID: 188)

    • Reads Environment values

      • Client.exe (PID: 188)
      • a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.exe (PID: 5400)

    • Reads the machine GUID from the registry

      • a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.exe (PID: 5400)
      • Client.exe (PID: 188)

    • Reads the computer name

      • Client.exe (PID: 188)
      • a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.exe (PID: 5400)

    • The process uses the downloaded file

      • a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.exe (PID: 5400)
      • Client.exe (PID: 188)
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: 0x31e3ce
UninitializedDataSize: -
InitializedDataSize: 3584
CodeSize: 3261440
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 a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.exe #QUASAR client.exe

Process information

PID
CMD
Path
Indicators
Parent process
5400"C:\Users\admin\Desktop\a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.exe" C:\Users\admin\Desktop\a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.exe
explorer.exe
User:
admin
Integrity Level:
MEDIUM
Description:
Quasar Client
Exit code:
3
Version:
1.4.1
Modules
Images
c:\users\admin\desktop\a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.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
188"C:\Users\admin\AppData\Roaming\SubDir\Client.exe"C:\Users\admin\AppData\Roaming\SubDir\Client.exe
a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.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
786
Read events
784
Write events
2
Delete events
0

Modification events

(PID) Process:(5400) a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.exeKey:HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Operation:writeName:vchost32
Value:
"C:\Users\admin\AppData\Roaming\SubDir\Client.exe"
(PID) Process:(188) Client.exeKey:HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Operation:writeName:vchost32
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
5400a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.exeC:\Users\admin\AppData\Roaming\SubDir\Client.exeexecutable
MD5:94222631EF1071A4F7CEB180CF8A4A5A
SHA256:A45B373B780F5B9FCF5C51473C69BBF0ED650F300523097602B35F5222BD122B
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
4
TCP/UDP connections
21
DNS requests
7
Threats
0

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
640
svchost.exe
GET
200
23.48.23.166:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl
unknown
—
—
whitelisted
4712
MoUsoCoreWorker.exe
GET
200
23.48.23.166:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.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
640
svchost.exe
GET
200
184.30.21.171:80
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
—
—
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
640
svchost.exe
51.104.136.2:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
—
—
51.104.136.2:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
4
System
192.168.100.255:138
—
—
—
whitelisted
4712
MoUsoCoreWorker.exe
23.48.23.166:80
crl.microsoft.com
Akamai International B.V.
DE
whitelisted
640
svchost.exe
23.48.23.166:80
crl.microsoft.com
Akamai International B.V.
DE
whitelisted
640
svchost.exe
184.30.21.171:80
www.microsoft.com
AKAMAI-AS
DE
whitelisted
4712
MoUsoCoreWorker.exe
184.30.21.171:80
www.microsoft.com
AKAMAI-AS
DE
whitelisted
188
Client.exe
91.92.243.191:5401
—
Natskovi & Sie Ltd.
BG
malicious

DNS requests

Domain
IP
Reputation
settings-win.data.microsoft.com
  • 51.104.136.2
  • 20.73.194.208
whitelisted
google.com
  • 142.250.186.174
whitelisted
crl.microsoft.com
  • 23.48.23.166
  • 23.48.23.176
  • 23.48.23.143
whitelisted
www.microsoft.com
  • 184.30.21.171
whitelisted
self.events.data.microsoft.com
  • 20.42.73.31
whitelisted

Threats

No threats detected
No debug info
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Reports
a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b.exe