| File name: | 943699ed8f49842c31c0d7de09dce2b105e65b8931bab.exe |
| Full analysis: | https://app.any.run/tasks/b6542ee8-b81e-4426-a006-30e29248696b |
| 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. |
| Analysis date: | May 16, 2025, 17:35:16 |
| OS: | Windows 10 Professional (build: 19044, 64 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/vnd.microsoft.portable-executable |
| File info: | PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows, 3 sections |
| MD5: | E8AFE371B2D9C56B771BEFB5EFC0E854 |
| SHA1: | 254CD717C711A3C43692A53AB27A0F6123EACA6D |
| SHA256: | 943699ED8F49842C31C0D7DE09DCE2B105E65B8931BABC996D0BEB67DD53AAEB |
| SSDEEP: | 98304:L2NkKCmRf7uY1+DVlYZ+hHaIDg9Ji/K9:xXgyK |
MALICIOUS
Changes the autorun value in the registry
- 943699ed8f49842c31c0d7de09dce2b105e65b8931bab.exe (PID: 6048)
- Client.exe (PID: 900)
QUASAR has been detected (YARA)
- Client.exe (PID: 900)
QUASAR has been detected (SURICATA)
- Client.exe (PID: 900)
Connects to the CnC server
- Client.exe (PID: 900)
SUSPICIOUS
Executable content was dropped or overwritten
- 943699ed8f49842c31c0d7de09dce2b105e65b8931bab.exe (PID: 6048)
Starts itself from another location
- 943699ed8f49842c31c0d7de09dce2b105e65b8931bab.exe (PID: 6048)
Contacting a server suspected of hosting an CnC
- Client.exe (PID: 900)
Checks for external IP
- svchost.exe (PID: 2196)
There is functionality for taking screenshot (YARA)
- Client.exe (PID: 900)
Connects to unusual port
- Client.exe (PID: 900)
INFO
Reads the computer name
- 943699ed8f49842c31c0d7de09dce2b105e65b8931bab.exe (PID: 6048)
- Client.exe (PID: 900)
- Client.exe (PID: 1276)
Reads the machine GUID from the registry
- 943699ed8f49842c31c0d7de09dce2b105e65b8931bab.exe (PID: 6048)
- Client.exe (PID: 900)
- Client.exe (PID: 1276)
Checks supported languages
- 943699ed8f49842c31c0d7de09dce2b105e65b8931bab.exe (PID: 6048)
- Client.exe (PID: 900)
- Client.exe (PID: 1276)
Creates files or folders in the user directory
- 943699ed8f49842c31c0d7de09dce2b105e65b8931bab.exe (PID: 6048)
Auto-launch of the file from Registry key
- 943699ed8f49842c31c0d7de09dce2b105e65b8931bab.exe (PID: 6048)
- Client.exe (PID: 900)
Reads Environment values
- 943699ed8f49842c31c0d7de09dce2b105e65b8931bab.exe (PID: 6048)
- Client.exe (PID: 900)
- Client.exe (PID: 1276)
Reads the software policy settings
- Client.exe (PID: 900)
- slui.exe (PID: 6808)
Checks proxy server information
- Client.exe (PID: 900)
Disables trace logs
- Client.exe (PID: 900)
Manual execution by a user
- Client.exe (PID: 1276)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
Quasar
(PID) Process(900) Client.exe
Version1.4.1
C2 (2)150.241.93.127:4782
Sub_DirSubDir
Install_NameClient.exe
Mutexb7cfe346-f941-4787-b55a-bc367b29effc
StartupQuasar Client Startup
TagOffice04
LogDirLogs
SignatureT86VDyWDG1e8Ne8djmbrei5W9B6wvjrZDK2uVCmGdcA/NEaGhmTQOEqmD34eQNsjkk1ibzl+Vr5hurAYhpFGni/8KQWJhrjZhanwt+v149ZRdyqFjCzo6vlmhXTBIz6q7xmaTQuFwUBegJY4IfSptchhVE1fKfwCiWKy8TMcKgDkL84dPUPwPG7+uU+pTrgnd7XI8H5rVL4ZItSkc0i7mW11luYt0d8CF6TScNGxd8GXjxef5v4pn6h4iUs1bTQKPLS3fbhXZsT8yrDYVz3WJrE6aOqgvFP0h8EfPJn4Yuk9...
CertificateMIIE9DCCAtygAwIBAgIQAOZHt0mIuDr1tz9mL5W8SzANBgkqhkiG9w0BAQ0FADAbMRkwFwYDVQQDDBBRdWFzYXIgU2VydmVyIENBMCAXDTI1MDUxNDE1NTIwMFoYDzk5OTkxMjMxMjM1OTU5WjAbMRkwFwYDVQQDDBBRdWFzYXIgU2VydmVyIENBMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAioOOPDSNeOLESQmr7bvNXQy5o7Ar7wMQGNHqYCMci8BQ0DOso2vxJJOi3R3SUFc0jQ4jkPUK...
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 |
Total processes
134
Monitored processes
7
Malicious processes
2
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 900 | "C:\Users\admin\AppData\Roaming\SubDir\Client.exe" | C:\Users\admin\AppData\Roaming\SubDir\Client.exe | 943699ed8f49842c31c0d7de09dce2b105e65b8931bab.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Description: Quasar Client Version: 1.4.1 Modules
Quasar(PID) Process(900) Client.exe Version1.4.1 C2 (2)150.241.93.127:4782 Sub_DirSubDir Install_NameClient.exe Mutexb7cfe346-f941-4787-b55a-bc367b29effc StartupQuasar Client Startup TagOffice04 LogDirLogs SignatureT86VDyWDG1e8Ne8djmbrei5W9B6wvjrZDK2uVCmGdcA/NEaGhmTQOEqmD34eQNsjkk1ibzl+Vr5hurAYhpFGni/8KQWJhrjZhanwt+v149ZRdyqFjCzo6vlmhXTBIz6q7xmaTQuFwUBegJY4IfSptchhVE1fKfwCiWKy8TMcKgDkL84dPUPwPG7+uU+pTrgnd7XI8H5rVL4ZItSkc0i7mW11luYt0d8CF6TScNGxd8GXjxef5v4pn6h4iUs1bTQKPLS3fbhXZsT8yrDYVz3WJrE6aOqgvFP0h8EfPJn4Yuk9... CertificateMIIE9DCCAtygAwIBAgIQAOZHt0mIuDr1tz9mL5W8SzANBgkqhkiG9w0BAQ0FADAbMRkwFwYDVQQDDBBRdWFzYXIgU2VydmVyIENBMCAXDTI1MDUxNDE1NTIwMFoYDzk5OTkxMjMxMjM1OTU5WjAbMRkwFwYDVQQDDBBRdWFzYXIgU2VydmVyIENBMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAioOOPDSNeOLESQmr7bvNXQy5o7Ar7wMQGNHqYCMci8BQ0DOso2vxJJOi3R3SUFc0jQ4jkPUK... | |||||||||||||||
| 1276 | "C:\Users\admin\AppData\Roaming\SubDir\Client.exe" | C:\Users\admin\AppData\Roaming\SubDir\Client.exe | — | explorer.exe | |||||||||||
User: admin Integrity Level: MEDIUM Description: Quasar Client Exit code: 2 Version: 1.4.1 Modules
| |||||||||||||||
| 2136 | C:\WINDOWS\system32\SppExtComObj.exe -Embedding | C:\Windows\System32\SppExtComObj.Exe | — | svchost.exe | |||||||||||
User: NETWORK SERVICE Company: Microsoft Corporation Integrity Level: SYSTEM Description: KMS Connection Broker Version: 10.0.19041.3996 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 2196 | C:\WINDOWS\system32\svchost.exe -k NetworkService -p -s Dnscache | C:\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
| |||||||||||||||
| 3900 | C:\WINDOWS\System32\slui.exe -Embedding | C:\Windows\System32\slui.exe | — | svchost.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows Activation Client Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 6048 | "C:\Users\admin\AppData\Local\Temp\943699ed8f49842c31c0d7de09dce2b105e65b8931bab.exe" | C:\Users\admin\AppData\Local\Temp\943699ed8f49842c31c0d7de09dce2b105e65b8931bab.exe | explorer.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Description: Quasar Client Exit code: 3 Version: 1.4.1 Modules
| |||||||||||||||
| 6808 | "C:\WINDOWS\System32\SLUI.exe" RuleId=3482d82e-ca2c-4e1f-8864-da0267b484b2;Action=AutoActivate;AppId=55c92734-d682-4d71-983e-d6ec3f16059f;SkuId=4de7cb65-cdf1-4de9-8ae8-e3cce27b9f2c;NotificationInterval=1440;Trigger=TimerEvent | C:\Windows\System32\slui.exe | SppExtComObj.Exe | ||||||||||||
User: NETWORK SERVICE Company: Microsoft Corporation Integrity Level: SYSTEM Description: Windows Activation Client Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
Total events
5 729
Read events
5 713
Write events
16
Delete events
0
Modification events
| (PID) Process: | (6048) 943699ed8f49842c31c0d7de09dce2b105e65b8931bab.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run |
| Operation: | write | Name: | Quasar Client Startup |
Value: "C:\Users\admin\AppData\Roaming\SubDir\Client.exe" | |||
| (PID) Process: | (900) Client.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run |
| Operation: | write | Name: | Quasar Client Startup |
Value: "C:\Users\admin\AppData\Roaming\SubDir\Client.exe" | |||
| (PID) Process: | (900) Client.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\Client_RASAPI32 |
| Operation: | write | Name: | EnableFileTracing |
Value: 0 | |||
| (PID) Process: | (900) Client.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\Client_RASAPI32 |
| Operation: | write | Name: | EnableAutoFileTracing |
Value: 0 | |||
| (PID) Process: | (900) Client.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\Client_RASAPI32 |
| Operation: | write | Name: | EnableConsoleTracing |
Value: 0 | |||
| (PID) Process: | (900) Client.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\Client_RASAPI32 |
| Operation: | write | Name: | FileTracingMask |
Value: | |||
| (PID) Process: | (900) Client.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\Client_RASAPI32 |
| Operation: | write | Name: | ConsoleTracingMask |
Value: | |||
| (PID) Process: | (900) Client.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\Client_RASAPI32 |
| Operation: | write | Name: | MaxFileSize |
Value: 1048576 | |||
| (PID) Process: | (900) Client.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\Client_RASAPI32 |
| Operation: | write | Name: | FileDirectory |
Value: %windir%\tracing | |||
| (PID) Process: | (900) Client.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\Client_RASMANCS |
| Operation: | write | Name: | EnableFileTracing |
Value: 0 | |||
Executable files
1
Suspicious files
0
Text files
0
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 6048 | 943699ed8f49842c31c0d7de09dce2b105e65b8931bab.exe | C:\Users\admin\AppData\Roaming\SubDir\Client.exe | executable | |
MD5:E8AFE371B2D9C56B771BEFB5EFC0E854 | SHA256:943699ED8F49842C31C0D7DE09DCE2B105E65B8931BABC996D0BEB67DD53AAEB | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
5
TCP/UDP connections
23
DNS requests
17
Threats
3
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
— | — | GET | 200 | 23.48.23.156:80 | http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl | unknown | — | — | whitelisted |
— | — | GET | 200 | 23.35.229.160:80 | http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl | unknown | — | — | whitelisted |
6544 | svchost.exe | GET | 200 | 2.17.190.73:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D | unknown | — | — | whitelisted |
3268 | SIHClient.exe | GET | 200 | 23.35.229.160:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl | unknown | — | — | whitelisted |
3268 | SIHClient.exe | GET | 200 | 23.35.229.160:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.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 |
|---|---|---|---|---|---|---|
4 | System | 192.168.100.255:137 | — | — | — | whitelisted |
— | — | 40.127.240.158:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
— | — | 23.48.23.156:80 | crl.microsoft.com | Akamai International B.V. | DE | whitelisted |
— | — | 23.35.229.160:80 | www.microsoft.com | AKAMAI-AS | DE | whitelisted |
2104 | svchost.exe | 40.127.240.158:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
— | — | 20.73.194.208:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
2112 | svchost.exe | 20.73.194.208:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
900 | Client.exe | 150.241.93.127:4782 | — | Fundacion Tecnalia Research and Innovation | ES | malicious |
900 | Client.exe | 195.201.57.90:443 | ipwho.is | Hetzner Online GmbH | DE | malicious |
DNS requests
Domain | IP | Reputation |
|---|---|---|
settings-win.data.microsoft.com |
| whitelisted |
crl.microsoft.com |
| whitelisted |
www.microsoft.com |
| whitelisted |
google.com |
| whitelisted |
ipwho.is |
| malicious |
client.wns.windows.com |
| whitelisted |
login.live.com |
| whitelisted |
ocsp.digicert.com |
| whitelisted |
slscr.update.microsoft.com |
| whitelisted |
fe3cr.delivery.mp.microsoft.com |
| whitelisted |
Threats
PID | Process | Class | Message |
|---|---|---|---|
2196 | svchost.exe | Potentially Bad Traffic | ET INFO External IP Lookup Domain in DNS Lookup (ipwho .is) |
900 | Client.exe | Domain Observed Used for C2 Detected | ET MALWARE Generic AsyncRAT/zgRAT Style SSL Cert |
900 | Client.exe | Domain Observed Used for C2 Detected | ET MALWARE Observed Malicious SSL Cert (Quasar CnC) |