| File name: | mestermc.exe |
| Full analysis: | https://app.any.run/tasks/1c8a1836-2ae4-4ba5-82d8-63ed40000f1b |
| Verdict: | Malicious activity |
| Threats: | A loader is malicious software that infiltrates devices to deliver malicious payloads. This malware is capable of infecting victims’ computers, analyzing their system information, and installing other types of threats, such as trojans or stealers. Criminals usually deliver loaders through phishing emails and links by relying on social engineering to trick users into downloading and running their executables. Loaders employ advanced evasion and persistence tactics to avoid detection. |
| Analysis date: | July 08, 2025, 20:46:10 |
| OS: | Windows 10 Professional (build: 19044, 64 bit) |
| Tags: | |
| MIME: | application/vnd.microsoft.portable-executable |
| File info: | PE32 executable (GUI) Intel 80386, for MS Windows, 11 sections |
| MD5: | DEB9C806AA00DE374FA78D5FFB02BA40 |
| SHA1: | 3FBDBB1B91E21475DD5A7E1DBA94A6EBAB771E71 |
| SHA256: | 58DE88C919C75751592A8ED36B280EC41837E30D0ECF9EFFBFB92232D584C42A |
| SSDEEP: | 98304:jLVIF8P3n1BLHxtD59KEKjSvkyklAI6YFKUvguJZYsdgQsbh1vNIw1aYOtj7fQEy:6YDo2 |
| .exe | | | Inno Setup installer (67.7) |
|---|---|---|
| .exe | | | Win32 EXE PECompact compressed (generic) (25.6) |
| .exe | | | Win32 Executable (generic) (2.7) |
| .exe | | | Win16/32 Executable Delphi generic (1.2) |
| .exe | | | Generic Win/DOS Executable (1.2) |
| MachineType: | Intel 386 or later, and compatibles |
|---|---|
| TimeStamp: | 2025:03:13 06:55:45+00:00 |
| ImageFileCharacteristics: | Executable, 32-bit |
| PEType: | PE32 |
| LinkerVersion: | 2.25 |
| CodeSize: | 704512 |
| InitializedDataSize: | 223232 |
| UninitializedDataSize: | - |
| EntryPoint: | 0xacfe0 |
| OSVersion: | 6.1 |
| ImageVersion: | - |
| SubsystemVersion: | 6.1 |
| Subsystem: | Windows GUI |
| FileVersionNumber: | 0.0.0.0 |
| ProductVersionNumber: | 0.0.0.0 |
| FileFlagsMask: | 0x003f |
| FileFlags: | (none) |
| FileOS: | Win32 |
| ObjectFileType: | Executable application |
| FileSubtype: | - |
| LanguageCode: | Neutral |
| CharacterSet: | Unicode |
| Comments: | This installation was built with Inno Setup. |
| CompanyName: | |
| FileDescription: | MesterMC Setup |
| FileVersion: | |
| LegalCopyright: | |
| OriginalFileName: | |
| ProductName: | MesterMC |
| ProductVersion: | 1.0 |
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 684 | "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250227124745 -prefsHandle 1980 -prefsLen 36520 -prefMapHandle 1984 -prefMapSize 272997 -ipcHandle 2056 -initialChannelId {aecad503-916a-47d7-84e2-d5f23c0fd2ca} -parentPid 2632 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2632" -appDir "C:\Program Files\Mozilla Firefox\browser" - 1 gpu | C:\Program Files\Mozilla Firefox\firefox.exe | — | firefox.exe | |||||||||||
User: admin Company: Mozilla Corporation Integrity Level: MEDIUM Description: Firefox Exit code: 1 Version: 136.0 Modules
| |||||||||||||||
| 728 | "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --lang=en-US --service-sandbox-type=service --disable-quic --string-annotations --always-read-main-dll --field-trial-handle=3772,i,2426296518231541681,2079724373613950041,262144 --variations-seed-version --mojo-platform-channel-handle=7968 /prefetch:8 | C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe | — | msedge.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: LOW Description: Microsoft Edge Exit code: 0 Version: 133.0.3065.92 Modules
| |||||||||||||||
| 868 | "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --disable-quic --string-annotations --always-read-main-dll --field-trial-handle=6528,i,2426296518231541681,2079724373613950041,262144 --variations-seed-version --mojo-platform-channel-handle=5412 /prefetch:8 | C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe | — | msedge.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: LOW Description: Microsoft Edge Exit code: 0 Version: 133.0.3065.92 Modules
| |||||||||||||||
| 952 | "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --string-annotations --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --js-flags=--ms-user-locale= --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=17 --always-read-main-dll --field-trial-handle=5348,i,2426296518231541681,2079724373613950041,262144 --variations-seed-version --mojo-platform-channel-handle=6072 /prefetch:1 | C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe | — | msedge.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: LOW Description: Microsoft Edge Version: 133.0.3065.92 Modules
| |||||||||||||||
| 1096 | "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=edge_collections.mojom.CollectionsDataManager --lang=en-US --service-sandbox-type=collections --disable-quic --string-annotations --always-read-main-dll --field-trial-handle=7880,i,2426296518231541681,2079724373613950041,262144 --variations-seed-version --mojo-platform-channel-handle=7892 /prefetch:8 | C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe | — | msedge.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: LOW Description: Microsoft Edge Exit code: 0 Version: 133.0.3065.92 Modules
| |||||||||||||||
| 1324 | "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=edge_xpay_wallet.mojom.EdgeXPayWalletService --lang=en-US --service-sandbox-type=utility --disable-quic --string-annotations --always-read-main-dll --field-trial-handle=5692,i,2426296518231541681,2079724373613950041,262144 --variations-seed-version --mojo-platform-channel-handle=5684 /prefetch:8 | C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe | — | msedge.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: LOW Description: Microsoft Edge Version: 133.0.3065.92 Modules
| |||||||||||||||
| 1380 | "C:\Users\admin\AppData\Local\Temp\mestermc.exe" /SPAWNWND=$702E4 /NOTIFYWND=$702BE | C:\Users\admin\AppData\Local\Temp\mestermc.exe | mestermc.tmp | ||||||||||||
User: admin Company: Integrity Level: HIGH Description: MesterMC Setup Exit code: 0 Version: Modules
| |||||||||||||||
| 1752 | "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc -parentBuildID 20250227124745 -sandboxingKind 1 -prefsHandle 5660 -prefsLen 45120 -prefMapHandle 5252 -prefMapSize 272997 -ipcHandle 6032 -initialChannelId {62914a78-518f-4d69-a2c9-bc8e6f24aea4} -parentPid 2632 -crashReporter "\\.\pipe\gecko-crash-server-pipe.2632" -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - 13 utility | C:\Program Files\Mozilla Firefox\firefox.exe | — | firefox.exe | |||||||||||
User: admin Company: Mozilla Corporation Integrity Level: MEDIUM Description: Firefox Exit code: 1 Version: 136.0 Modules
| |||||||||||||||
| 2040 | "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --disable-quic --string-annotations --always-read-main-dll --field-trial-handle=5960,i,2426296518231541681,2079724373613950041,262144 --variations-seed-version --mojo-platform-channel-handle=2376 /prefetch:8 | C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe | — | msedge.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: LOW Description: Microsoft Edge Exit code: 0 Version: 133.0.3065.92 Modules
| |||||||||||||||
| 2124 | "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=audio.mojom.AudioService --lang=en-US --service-sandbox-type=audio --disable-quic --string-annotations --always-read-main-dll --field-trial-handle=7216,i,2426296518231541681,2079724373613950041,262144 --variations-seed-version --mojo-platform-channel-handle=7376 /prefetch:8 | C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe | — | msedge.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: LOW Description: Microsoft Edge Version: 133.0.3065.92 Modules
| |||||||||||||||
| (PID) Process: | (5188) mestermc.tmp | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\MesterMC_is1 |
| Operation: | write | Name: | Inno Setup: Setup Version |
Value: 6.4.2 | |||
| (PID) Process: | (5188) mestermc.tmp | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\MesterMC_is1 |
| Operation: | write | Name: | Inno Setup: App Path |
Value: C:\Users\admin\AppData\Roaming\MesterMC | |||
| (PID) Process: | (5188) mestermc.tmp | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\MesterMC_is1 |
| Operation: | write | Name: | InstallLocation |
Value: C:\Users\admin\AppData\Roaming\MesterMC\ | |||
| (PID) Process: | (5188) mestermc.tmp | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\MesterMC_is1 |
| Operation: | write | Name: | Inno Setup: Icon Group |
Value: (Default) | |||
| (PID) Process: | (5188) mestermc.tmp | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\MesterMC_is1 |
| Operation: | write | Name: | Inno Setup: User |
Value: admin | |||
| (PID) Process: | (5188) mestermc.tmp | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\MesterMC_is1 |
| Operation: | write | Name: | Inno Setup: Selected Tasks |
Value: desktopicon,startmenuicon | |||
| (PID) Process: | (5188) mestermc.tmp | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\MesterMC_is1 |
| Operation: | write | Name: | Inno Setup: Deselected Tasks |
Value: | |||
| (PID) Process: | (5188) mestermc.tmp | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\MesterMC_is1 |
| Operation: | write | Name: | Inno Setup: Language |
Value: hu | |||
| (PID) Process: | (5188) mestermc.tmp | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\MesterMC_is1 |
| Operation: | write | Name: | DisplayName |
Value: MesterMC, verzió: 1.0 | |||
| (PID) Process: | (5188) mestermc.tmp | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\MesterMC_is1 |
| Operation: | write | Name: | UninstallString |
Value: "C:\Users\admin\AppData\Roaming\MesterMC\unins000.exe" | |||
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 1380 | mestermc.exe | C:\Users\admin\AppData\Local\Temp\is-BS9QB.tmp\mestermc.tmp | executable | |
MD5:67F54AF2F8C4B38AC5428DF2B07B1916 | SHA256:4CD975F8CDEE88A6D8D96A732D8A6386A79C2164F218F0355C4625A891EE8D6A | |||
| 5188 | mestermc.tmp | C:\Users\admin\AppData\Local\Temp\is-N50DL.tmp\_isetup\_setup64.tmp | executable | |
MD5:E4211D6D009757C078A9FAC7FF4F03D4 | SHA256:388A796580234EFC95F3B1C70AD4CB44BFDDC7BA0F9203BF4902B9929B136F95 | |||
| 5188 | mestermc.tmp | C:\ProgramData\Microsoft\Windows\Start Menu\Programs\MesterMC.lnk | lnk | |
MD5:1CDFFC2712B6A295CD02D28D91B0AF1B | SHA256:BFB79BAE58BFC07FBE6BB14DA2C535D78708D9F86E48662DD91D2996B650043B | |||
| 2632 | firefox.exe | C:\Users\admin\AppData\Roaming\Mozilla\Firefox\Profiles\9kie7cg6.default-release\sessionCheckpoints.json.tmp | binary | |
MD5:EA8B62857DFDBD3D0BE7D7E4A954EC9A | SHA256:792955295AE9C382986222C6731C5870BD0E921E7F7E34CC4615F5CD67F225DA | |||
| 2632 | firefox.exe | C:\Users\admin\AppData\Roaming\Mozilla\Firefox\Profiles\9kie7cg6.default-release\prefs-1.js | text | |
MD5:2FD670934FEF0C60E2119BD874AAF470 | SHA256:771A7C83CA015BDBC6AB86A7BD9B1D54E40062E28942D311A9178A0FE6433CF2 | |||
| 2632 | firefox.exe | C:\Users\admin\AppData\Roaming\Mozilla\Firefox\Profiles\9kie7cg6.default-release\cookies.sqlite-shm | binary | |
MD5:B7C14EC6110FA820CA6B65F5AEC85911 | SHA256:FD4C9FDA9CD3F9AE7C962B0DDF37232294D55580E1AA165AA06129B8549389EB | |||
| 2220 | powershell.exe | C:\Users\admin\AppData\Local\Temp\__PSScriptPolicyTest_irebf1pz.py0.ps1 | text | |
MD5:D17FE0A3F47BE24A6453E9EF58C94641 | SHA256:96AD1146EB96877EAB5942AE0736B82D8B5E2039A80D3D6932665C1A4C87DCF7 | |||
| 2632 | firefox.exe | C:\Users\admin\AppData\Local\Mozilla\Firefox\Profiles\9kie7cg6.default-release\startupCache\urlCache-current.bin | binary | |
MD5:3134ED3F12E4F4F8643DB90043B0FD7B | SHA256:26E4F122034D7A03F6DA0E707799B09CBEEBDAF8D7A3133A1F7BD894AC72EEA1 | |||
| 2220 | powershell.exe | C:\Users\admin\AppData\Local\Temp\__PSScriptPolicyTest_4gxrlyxy.iyi.psm1 | text | |
MD5:D17FE0A3F47BE24A6453E9EF58C94641 | SHA256:96AD1146EB96877EAB5942AE0736B82D8B5E2039A80D3D6932665C1A4C87DCF7 | |||
| 2632 | firefox.exe | C:\Users\admin\AppData\Roaming\Mozilla\Firefox\Profiles\9kie7cg6.default-release\storage\permanent\chrome\idb\3870112724rsegmnoittet-es.sqlite-shm | binary | |
MD5:B7C14EC6110FA820CA6B65F5AEC85911 | SHA256:FD4C9FDA9CD3F9AE7C962B0DDF37232294D55580E1AA165AA06129B8549389EB | |||
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
1268 | svchost.exe | GET | 200 | 23.216.77.25:80 | http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl | unknown | — | — | whitelisted |
1268 | svchost.exe | GET | 200 | 23.35.229.160:80 | http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl | unknown | — | — | whitelisted |
2632 | firefox.exe | GET | 200 | 34.107.221.82:80 | http://detectportal.firefox.com/canonical.html | unknown | — | — | whitelisted |
3648 | svchost.exe | GET | 200 | 2.17.190.73:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D | unknown | — | — | whitelisted |
2632 | firefox.exe | GET | 200 | 34.107.221.82:80 | http://detectportal.firefox.com/success.txt?ipv4 | unknown | — | — | whitelisted |
2632 | firefox.exe | POST | 200 | 172.217.18.3:80 | http://o.pki.goog/we2 | unknown | — | — | whitelisted |
2632 | firefox.exe | GET | 200 | 34.107.221.82:80 | http://detectportal.firefox.com/success.txt?ipv4 | unknown | — | — | whitelisted |
2632 | firefox.exe | POST | 200 | 172.217.18.3:80 | http://o.pki.goog/s/wr3/k58 | unknown | — | — | whitelisted |
2632 | firefox.exe | POST | 200 | 172.217.18.3:80 | http://o.pki.goog/s/wr3/k58 | unknown | — | — | whitelisted |
2632 | firefox.exe | POST | 200 | 172.217.18.3:80 | http://o.pki.goog/s/wr3/azY | unknown | — | — | whitelisted |
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
4 | System | 192.168.100.255:137 | — | — | — | whitelisted |
1268 | svchost.exe | 51.104.136.2:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
5944 | MoUsoCoreWorker.exe | 51.104.136.2:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
4400 | RUXIMICS.exe | 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 |
1268 | svchost.exe | 51.124.78.146:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
1268 | svchost.exe | 23.216.77.25:80 | crl.microsoft.com | Akamai International B.V. | DE | whitelisted |
1268 | svchost.exe | 23.35.229.160:80 | www.microsoft.com | AKAMAI-AS | DE | whitelisted |
2220 | powershell.exe | 89.187.169.47:443 | mestermc.b-cdn.net | Datacamp Limited | DE | whitelisted |
2632 | firefox.exe | 34.160.144.191:443 | content-signature-2.cdn.mozilla.net | GOOGLE | US | whitelisted |
Domain | IP | Reputation |
|---|---|---|
settings-win.data.microsoft.com |
| whitelisted |
google.com |
| whitelisted |
crl.microsoft.com |
| whitelisted |
www.microsoft.com |
| whitelisted |
mestermc.b-cdn.net |
| whitelisted |
content-signature-2.cdn.mozilla.net |
| whitelisted |
content-signature-chains.prod.autograph.services.mozaws.net |
| whitelisted |
login.live.com |
| whitelisted |
detectportal.firefox.com |
| whitelisted |
contile.services.mozilla.com |
| whitelisted |
PID | Process | Class | Message |
|---|---|---|---|
— | — | Unknown Traffic | ET USER_AGENTS Microsoft Dr Watson User-Agent (MSDW) |
— | — | Potentially Bad Traffic | ET INFO Possible Chrome Plugin install |
7812 | javaw.exe | Potential Corporate Privacy Violation | ET INFO User-Agent (Launcher) |
7812 | javaw.exe | Potential Corporate Privacy Violation | ET INFO User-Agent (Launcher) |