| File name: | Client-built.exe |
| Full analysis: | https://app.any.run/tasks/4e56c5c8-3a5d-4b62-a018-f2fe685146c3 |
| 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 15, 2025, 16:32:48 |
| 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: | 0F476BD37B1A79866DB7BD91E93EE5BA |
| SHA1: | BB1472ACC5CC75C07E600016C5DFA7E292DA1B5C |
| SHA256: | 7A3170963A7220014B0D0556C30789E310CD316C2A0D9D4A53527C35C8974169 |
| SSDEEP: | 49152:70EcsT90z2NkvSCmRf7uY1+DVlYZ+hHjGmt/3Dg9iIb9j7JoOXOXVttg1zv7LoGP:o2NkKCmRf7uY1+DVlYZ+hHaIDg+gxx |
| .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) |
| 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 |
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 6184 | "C:\WINDOWS\system32\taskmgr.exe" /7 | C:\Windows\System32\Taskmgr.exe | — | explorer.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Task Manager Exit code: 3221226540 Version: 10.0.19041.3636 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7184 | "C:\WINDOWS\system32\taskmgr.exe" /7 | C:\Windows\System32\Taskmgr.exe | explorer.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Task Manager Version: 10.0.19041.3636 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7468 | 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 Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7508 | "C:\Users\admin\AppData\Local\Temp\Client-built.exe" | C:\Users\admin\AppData\Local\Temp\Client-built.exe | explorer.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Description: Quasar Client Exit code: 3 Version: 1.4.1 Modules
| |||||||||||||||
| 7548 | "C:\Users\admin\AppData\Roaming\SubDir\Client.exe" | C:\Users\admin\AppData\Roaming\SubDir\Client.exe | Client-built.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Description: Quasar Client Version: 1.4.1 Modules
Quasar(PID) Process(7548) Client.exe Version1.4.1 C2 (2)10.0.0.114:4782 Sub_DirSubDir Install_NameClient.exe Mutexc9753698-a42e-4d78-9fac-db0f662ee0b1 StartupQuasar Client Startup TagOffice04 LogDirLogs SignatureJzapCPp2cNNmk8CBoQoXLdDmxzJbLkVes7L+QItIHvPqZlWiKknBJg3iBmOtbpe1wDqkz4HsGkwLVNEfWfOmvqM+JguK8NOQkRV3JMLlBzw/fCTeTgQ2clrj1jndxelbjjQ/0ZMbdXBIu40BSEDVy4nIYy6GLgo1WByovmArbPITwXg++1JZ7bXCCz8KYwGYnuo7yiXthPsMNOgEklG9IomL5PyU3xzGNgwpGQUgCKfxIGQMxD38PDu2P9MPTUDlOAA5HZRtrHxrTLbV+ddAQ8D1Hg2XzlTAhrJXVvLJnjqu... CertificateMIIE9DCCAtygAwIBAgIQAItcNMA9k3YtEoWgPM6I4zANBgkqhkiG9w0BAQ0FADAbMRkwFwYDVQQDDBBRdWFzYXIgU2VydmVyIENBMCAXDTI1MDUxMzEyNDcyOFoYDzk5OTkxMjMxMjM1OTU5WjAbMRkwFwYDVQQDDBBRdWFzYXIgU2VydmVyIENBMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEApEfBiY9iHzQllkLah2d8UZQglL1jpmDqUyYsaxGp3/lbBCFsQyFAnCBs9ttuxqfmm4UPWugS... | |||||||||||||||
| 7624 | 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
| |||||||||||||||
| 7656 | "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 Exit code: 1 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| (PID) Process: | (7184) Taskmgr.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\TaskManager |
| Operation: | delete value | Name: | Preferences |
Value: | |||
| (PID) Process: | (7184) Taskmgr.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\TaskManager |
| Operation: | write | Name: | Preferences |
Value: 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| |||
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 7184 | Taskmgr.exe | C:\Users\admin\AppData\Local\D3DSCache\3534848bb9f4cb71\F4EB2D6C-ED2B-4BDD-AD9D-F913287E6768.lock | text | |
MD5:F49655F856ACB8884CC0ACE29216F511 | SHA256:7852FCE59C67DDF1D6B8B997EAA1ADFAC004A9F3A91C37295DE9223674011FBA | |||
| 7508 | Client-built.exe | C:\Users\admin\AppData\Roaming\SubDir\Client.exe | executable | |
MD5:0F476BD37B1A79866DB7BD91E93EE5BA | SHA256:7A3170963A7220014B0D0556C30789E310CD316C2A0D9D4A53527C35C8974169 | |||
| 7548 | Client.exe | C:\Users\admin\AppData\Roaming\Logs\2025-05-15 | binary | |
MD5:BDCDC278EFD1BAA385C24191A318CA8C | SHA256:27AA94112BCCB4F739A800ECA91C8D5742DB2F5B13B26BC369877815083405D7 | |||
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
— | — | GET | 200 | 23.48.23.145:80 | 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 |
5496 | MoUsoCoreWorker.exe | GET | 200 | 23.35.229.160:80 | http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl | unknown | — | — | whitelisted |
7344 | 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 |
7344 | SIHClient.exe | GET | 200 | 95.101.149.131:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl | unknown | — | — | whitelisted |
6544 | svchost.exe | GET | 200 | 2.17.190.73:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D | unknown | — | — | whitelisted |
2924 | SearchApp.exe | GET | 200 | 2.23.77.188:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEAUZZSZEml49Gjh0j13P68w%3D | unknown | — | — | whitelisted |
2924 | SearchApp.exe | GET | 200 | 2.23.77.188:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTrjrydRyt%2BApF3GSPypfHBxR5XtQQUs9tIpPmhxdiuNkHMEWNpYim8S8YCEAI5PUjXAkJafLQcAAsO18o%3D | unknown | — | — | whitelisted |
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
4 | System | 192.168.100.255:137 | — | — | — | whitelisted |
2104 | 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 |
— | — | 23.48.23.145:80 | crl.microsoft.com | Akamai International B.V. | DE | whitelisted |
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
— | — | 23.35.229.160:80 | www.microsoft.com | AKAMAI-AS | DE | whitelisted |
5496 | MoUsoCoreWorker.exe | 23.35.229.160:80 | www.microsoft.com | AKAMAI-AS | DE | whitelisted |
— | — | 4.231.128.59:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
3216 | svchost.exe | 172.211.123.250:443 | client.wns.windows.com | MICROSOFT-CORP-MSN-AS-BLOCK | FR | whitelisted |
7548 | Client.exe | 10.0.0.114:4782 | — | — | — | unknown |
Domain | IP | Reputation |
|---|---|---|
settings-win.data.microsoft.com |
| whitelisted |
crl.microsoft.com |
| whitelisted |
www.microsoft.com |
| whitelisted |
google.com |
| whitelisted |
client.wns.windows.com |
| whitelisted |
login.live.com |
| whitelisted |
ocsp.digicert.com |
| whitelisted |
slscr.update.microsoft.com |
| whitelisted |
fe3cr.delivery.mp.microsoft.com |
| whitelisted |
activation-v2.sls.microsoft.com |
| whitelisted |