File name:

Bootstrapper.exe

Full analysis: https://app.any.run/tasks/e4f4a97c-2282-427e-878b-5343f41239f6
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 17, 2024, 04:27:21
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:

972D7BCD3EB4DAAA0EF69215D91E41D9

SHA1:

D3BCC25F8585405642A113AE6BAE503648A765A2

SHA256:

BFB28A852B12A795FB4D21FBE2B2F4C56E9742CBEACE1CF9564B97BDA1D08E55

SSDEEP:

49152:1io7RPY2uikNeRyd72MlsLDil92m3GjNsz/3Dg5NICBzjTJvIrCXgb6aXzvUFoGY:62uiieRyd72QsLDil92m3GJEDgLamy

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

      • Bootstrapper.exe (PID: 6504)
      • Client.exe (PID: 6540)

    • QUASAR has been detected (YARA)

      • Client.exe (PID: 6540)

  • SUSPICIOUS

    • Starts itself from another location

      • Bootstrapper.exe (PID: 6504)

    • Executable content was dropped or overwritten

      • Bootstrapper.exe (PID: 6504)

    • Reads security settings of Internet Explorer

      • Client.exe (PID: 6540)

    • Potential Corporate Privacy Violation

      • svchost.exe (PID: 2192)

    • Connects to unusual port

      • Client.exe (PID: 6540)

  • INFO

    • Reads Environment values

      • Bootstrapper.exe (PID: 6504)
      • Client.exe (PID: 6540)

    • Checks supported languages

      • Bootstrapper.exe (PID: 6504)
      • Client.exe (PID: 6540)

    • Creates files or folders in the user directory

      • Bootstrapper.exe (PID: 6504)

    • Reads the machine GUID from the registry

      • Bootstrapper.exe (PID: 6504)
      • Client.exe (PID: 6540)

    • Reads the computer name

      • Bootstrapper.exe (PID: 6504)
      • Client.exe (PID: 6540)

    • The process uses the downloaded file

      • Bootstrapper.exe (PID: 6504)
      • Client.exe (PID: 6540)
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

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: 0x31e42e
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
118
Monitored processes
3
Malicious processes
3
Suspicious processes
0

Behavior graph

Click at the process to see the details
start bootstrapper.exe #QUASAR client.exe svchost.exe

Process information

PID
CMD
Path
Indicators
Parent process
2192C:\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
6504"C:\Users\admin\Desktop\Bootstrapper.exe" C:\Users\admin\Desktop\Bootstrapper.exe
explorer.exe
User:
admin
Integrity Level:
MEDIUM
Description:
Quasar Client
Exit code:
3
Version:
1.4.1
Modules
Images
c:\users\admin\desktop\bootstrapper.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
6540"C:\Users\admin\AppData\Roaming\SubDir\Client.exe"C:\Users\admin\AppData\Roaming\SubDir\Client.exe
Bootstrapper.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
886
Read events
884
Write events
2
Delete events
0

Modification events

(PID) Process:(6504) Bootstrapper.exeKey:HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Operation:writeName:RedTiger Tool v6.1
Value:
"C:\Users\admin\AppData\Roaming\SubDir\Client.exe"
(PID) Process:(6540) Client.exeKey:HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Operation:writeName:RedTiger Tool v6.1
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
6504Bootstrapper.exeC:\Users\admin\AppData\Roaming\SubDir\Client.exeexecutable
MD5:972D7BCD3EB4DAAA0EF69215D91E41D9
SHA256:BFB28A852B12A795FB4D21FBE2B2F4C56E9742CBEACE1CF9564B97BDA1D08E55
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
4
TCP/UDP connections
63
DNS requests
9
Threats
2

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
4712
MoUsoCoreWorker.exe
GET
200
23.216.77.6:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl
unknown
—
—
whitelisted
5776
svchost.exe
GET
200
23.216.77.6:80
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
5776
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
20.73.194.208:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
NL
whitelisted
5776
svchost.exe
20.73.194.208:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
NL
whitelisted
—
—
20.73.194.208:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
NL
whitelisted
—
—
104.126.37.153:443
www.bing.com
Akamai International B.V.
DE
whitelisted
—
—
192.168.100.255:138
—
—
—
whitelisted
4712
MoUsoCoreWorker.exe
23.216.77.6:80
crl.microsoft.com
Akamai International B.V.
DE
whitelisted
5776
svchost.exe
23.216.77.6:80
crl.microsoft.com
Akamai International B.V.
DE
whitelisted
4712
MoUsoCoreWorker.exe
184.30.21.171:80
www.microsoft.com
AKAMAI-AS
DE
whitelisted
5776
svchost.exe
184.30.21.171:80
www.microsoft.com
AKAMAI-AS
DE
whitelisted

DNS requests

Domain
IP
Reputation
settings-win.data.microsoft.com
  • 20.73.194.208
  • 40.127.240.158
whitelisted
www.bing.com
  • 104.126.37.153
  • 104.126.37.170
  • 104.126.37.130
  • 104.126.37.161
  • 104.126.37.139
  • 104.126.37.163
  • 104.126.37.178
  • 104.126.37.137
  • 104.126.37.128
whitelisted
google.com
  • 142.250.186.174
whitelisted
crl.microsoft.com
  • 23.216.77.6
  • 23.216.77.28
whitelisted
www.microsoft.com
  • 184.30.21.171
whitelisted
AMNSALKSamongus-47679.portmap.host
  • 193.161.193.99
malicious
self.events.data.microsoft.com
  • 20.189.173.3
whitelisted

Threats

PID
Process
Class
Message
2192
svchost.exe
Potential Corporate Privacy Violation
ET POLICY DNS Query to a Reverse Proxy Service Observed
2192
svchost.exe
Misc activity
ET INFO DNS Query for Port Mapping/Tunneling Service Domain (.portmap .host)
No debug info
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Reports
Bootstrapper.exe