Analysis

  • max time kernel
    148s
  • max time network
    156s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    03/09/2026, 18:28

General

  • Target
    special%20invitation.msi
  • Size 2.9MB
  • Sample260903-w4hdmsdp41
  • SHA256 ed6d05c9cfb0055bf4c00b80d6bb9c8353aa7deb6625b1861a12e994570a40c2
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: AteraAgent

    AteraAgent is a remote monitoring and management tool.

  • Detects AteraAgent 1 IoCs
  • Badlisted process makes network request 3 IoCs

    Network request originating from process or tool commonly abused by malware.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 31 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in System32 directory 9 IoCs
  • Drops file in Program Files directory 23 IoCs
  • Drops file in Windows directory 39 IoCs
  • Launches sc.exe 1 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks SCSI registry key(s) 3 TTPs 5 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Kills process with taskkill 1 IoCs
  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies registry class 22 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\special%20invitation.msi
    1⤵
    • Badlisted process makes network request
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    PID:1052
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2012
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:2692
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 8D57A9302E47E61B2AAD1B9186B0D1DC
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:3304
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32.exe "C:\Windows\Installer\MSI1483.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240784828 2 AlphaControlAgentInstallation!AlphaControlAgentInstallation.CustomActions.GenerateAgentId
          3⤵
          • Loads dropped DLL
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          PID:4592
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32.exe "C:\Windows\Installer\MSI19B4.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240785859 6 AlphaControlAgentInstallation!AlphaControlAgentInstallation.CustomActions.ReportMsiStart
          3⤵
          • Badlisted process makes network request
          • Loads dropped DLL
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:3024
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32.exe "C:\Windows\Installer\MSI2176.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240787843 11 AlphaControlAgentInstallation!AlphaControlAgentInstallation.CustomActions.ShouldContinueInstallation
          3⤵
          • Loads dropped DLL
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          PID:4512
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32.exe "C:\Windows\Installer\MSI309E.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240791765 33 AlphaControlAgentInstallation!AlphaControlAgentInstallation.CustomActions.ReportMsiEnd
          3⤵
          • Badlisted process makes network request
          • Loads dropped DLL
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          PID:3984
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 33D9944DF1ABA5E966FE031A383C0D6C E Global\MSI0000
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:5424
        • C:\Windows\SysWOW64\NET.exe
          "NET" STOP AteraAgent
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:3544
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 STOP AteraAgent
            4⤵
            • System Location Discovery: System Language Discovery
            PID:4952
        • C:\Windows\SysWOW64\TaskKill.exe
          "TaskKill.exe" /f /im AteraAgent.exe
          3⤵
          • System Location Discovery: System Language Discovery
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:3844
      • C:\Program Files (x86)\ATERA Networks\AteraAgent\AteraAgent.exe
        "C:\Program Files (x86)\ATERA Networks\AteraAgent\AteraAgent.exe" /i /IntegratorLogin="[email protected]" /CompanyId="1" /IntegratorLoginUI="" /CompanyIdUI="" /FolderId="" /AccountId="001Q300000USqP8IAL" /AgentId="8ef55ecb-fb89-428d-930e-373242c628b3"
        2⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Drops file in Program Files directory
        • Modifies data under HKEY_USERS
        PID:1092
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      • Suspicious use of AdjustPrivilegeToken
      PID:5732
    • C:\Program Files (x86)\ATERA Networks\AteraAgent\AteraAgent.exe
      "C:\Program Files (x86)\ATERA Networks\AteraAgent\AteraAgent.exe"
      1⤵
      • Executes dropped EXE
      PID:4664
    • C:\Program Files (x86)\ATERA Networks\AteraAgent\AteraAgent.exe
      "C:\Program Files (x86)\ATERA Networks\AteraAgent\AteraAgent.exe"
      1⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4160
      • C:\Windows\System32\sc.exe
        "C:\Windows\System32\sc.exe" failure AteraAgent reset= 600 actions= restart/25000
        2⤵
        • Launches sc.exe
        PID:3380

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e5a134c.rbs

          • Path C:\Config.Msi\e5a134c.rbs
          • Size 8KB
          • SHA256 6e902281290a61a51e896b476f04769a584e3292c09a60bb9d6fe12174007351
          • MD5 SHA1 SHA512 SSDEEP TLSH

          AteraAgent.InstallLog

          • Path C:\Program Files (x86)\ATERA Networks\AteraAgent\AteraAgent.InstallLog
          • Size 753B
          • SHA256 6fbf5845a6738e2dc2aa67dd5f78da2c8f8cb41d866bbba10e5336787c731b25
          • MD5 SHA1 SHA512 TLSH

          AteraAgent.exe

          • Path C:\Program Files (x86)\ATERA Networks\AteraAgent\AteraAgent.exe
          • Size 142KB
          • SHA256 a96a0ba7998a6956c8073b6eff9306398cc03fb9866e4cabf0810a69bb2a43b2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          AteraAgent.exe.config

          • Path C:\Program Files (x86)\ATERA Networks\AteraAgent\AteraAgent.exe.config
          • Size 1KB
          • SHA256 e505b08308622ad12d98e1c7a07e5dc619a2a00bcd4a5cbe04fe8b078bcf94a2
          • MD5 SHA1 SHA512 TLSH

          ICSharpCode.SharpZipLib.dll

          • Path C:\Program Files (x86)\ATERA Networks\AteraAgent\ICSharpCode.SharpZipLib.dll
          • Size 210KB
          • SHA256 2b5b7a2afbc88a4f674e1d7836119b57e65fae6863f4be6832c38e08341f2d68
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Newtonsoft.Json.dll

          • Path C:\Program Files (x86)\ATERA Networks\AteraAgent\Newtonsoft.Json.dll
          • Size 693KB
          • SHA256 2a7a84768cc09a15362878b270371daad9872caacbbeebe7f30c4a7ed6c03ca7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          AgentPackageAgentInformation.exe

          • Path C:\Program Files (x86)\ATERA Networks\AteraAgent\Packages\AgentPackageAgentInformation\AgentPackageAgentInformation.exe
          • Size 284KB
          • SHA256 a173c0a56bcda8374579ef5ae1e1e73f25cf5e2a950a9b57f9ab7dc4f3f0fb33
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Pubnub.dll

          • Path C:\Program Files (x86)\ATERA Networks\AteraAgent\Pubnub.dll
          • Size 588KB
          • SHA256 13774cc16c1254752ea801538bfb9a9d1328f8b4dd3ff41760ac492a245fbb15
          • MD5 SHA1 SHA512 SSDEEP TLSH

          log.txt

          • Path C:\Program Files (x86)\ATERA Networks\AteraAgent\log.txt
          • Size 215B
          • SHA256 22a9f27ef820ea580b4569c09acf77148d013c8b8ec16a7d6aeca26b1f97626c
          • MD5 SHA1 SHA512 TLSH

          MSI1483.tmp

          • Path C:\Windows\Installer\MSI1483.tmp
          • Size 509KB
          • SHA256 87c97269e2b68898be87b884cd6a21880e6f15336b1194713e12a2db45f1dccf
          • MD5 SHA1 SHA512 SSDEEP TLSH

          AlphaControlAgentInstallation.dll

          • Path C:\Windows\Installer\MSI1483.tmp-\AlphaControlAgentInstallation.dll
          • Size 25KB
          • SHA256 e44a6582cd3f84f4255d3c230e0a2c284e0cffa0ca5e62e4d749e089555494c7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Windows\Installer\MSI1483.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 179KB
          • SHA256 cf06d4ed4a8baf88c82d6c9ae0efc81c469de6da8788ab35f373b350a4b4cdca
          • MD5 SHA1 SHA512 SSDEEP TLSH

          CustomAction.config

          • Path C:\Windows\Installer\MSI19B4.tmp-\CustomAction.config
          • Size 1KB
          • SHA256 e4ff538599c2d8e898d7f90ccf74081192d5afa8040e6b6c180f3aa0f46ad2c5
          • MD5 SHA1 SHA512 TLSH

          Newtonsoft.Json.dll

          • Path C:\Windows\Installer\MSI19B4.tmp-\Newtonsoft.Json.dll
          • Size 695KB
          • SHA256 c5c83bbc1741be6ff4c490c0aee34c162945423ec577c646538b2d21ce13199e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSI232D.tmp

          • Path C:\Windows\Installer\MSI232D.tmp
          • Size 211KB
          • SHA256 c8d190d5be1efd2d52f72a72ae9dfa3940ab3faceb626405959349654fe18b74
          • MD5 SHA1 SHA512 SSDEEP TLSH

          e5a134b.msi

          • Path C:\Windows\Installer\e5a134b.msi
          • Size 2.9MB
          • SHA256 ed6d05c9cfb0055bf4c00b80d6bb9c8353aa7deb6625b1861a12e994570a40c2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

          • Path C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
          • Size 727B
          • SHA256 c3230d3ee7f49c6c8df3e72fd39c9f536a207703d9e3168a47b734d938405cc5
          • MD5 SHA1 SHA512 TLSH

          C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

          • Path C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
          • Size 412B
          • SHA256 5d88660b7e25d48f44149c6ff274f73ee44f17bdbc06fe7eaaef9e4948fc6873
          • MD5 SHA1 SHA512 TLSH

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 26.1MB
          • SHA256 45cd213a55bce6fb6230cc77a6cba2cddd22695ff58ef25154c56bd059a39a5a
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {99252f66-c996-4799-a6b6-53a0d58b552b}_OnDiskSnapshotProp

          • Path \??\Volume{c61f3bad-0000-0000-0000-d08302000000}\System Volume Information\SPP\OnlineMetadataCache\{99252f66-c996-4799-a6b6-53a0d58b552b}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 bfe82d8fd5ef1d6a6dd635ff4a16caa4ca385c2ec1728a6cb30897b0dec87ba4
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/1092-107-0x0000025B39E30000-0x0000025B39E58000-memory.dmp

          memory/1092-119-0x0000025B544A0000-0x0000025B54538000-memory.dmp

          memory/1092-124-0x0000025B54440000-0x0000025B5447C000-memory.dmp

          memory/1092-123-0x0000025B3BBC0000-0x0000025B3BBD2000-memory.dmp

          memory/3024-51-0x00000000059A0000-0x00000000059C2000-memory.dmp

          memory/3024-52-0x0000000005B80000-0x0000000005EDB000-memory.dmp

          memory/3024-48-0x0000000005AC0000-0x0000000005B72000-memory.dmp

          memory/4160-161-0x000001DCF7650000-0x000001DCF7672000-memory.dmp

          memory/4160-157-0x000001DCF76E0000-0x000001DCF7792000-memory.dmp

          memory/4160-197-0x000001DCF7C30000-0x000001DCF7C68000-memory.dmp

          memory/4512-76-0x00000000054F0000-0x0000000005556000-memory.dmp

          memory/4592-24-0x00000000035F0000-0x00000000035FC000-memory.dmp

          memory/4592-20-0x0000000003610000-0x000000000363E000-memory.dmp