Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    29/05/2026, 18:15

General

  • Target
    DocuSign.msi
  • Size 8.2MB
  • Sample260529-wvx3qset9n
  • SHA256 cdf8e1012400896e603aceb7d9bce167b2eeb54f6b0f194f4603efbe2db001f0
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Badlisted process makes network request 13 IoCs

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

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Powershell Invoke Web Request.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 24 IoCs
  • 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 8 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 36 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • System Time Discovery 1 TTPs 4 IoCs

    Adversary may gather the system time and/or time zone settings from a local or remote system.

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

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

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies registry class 22 IoCs
  • Suspicious behavior: EnumeratesProcesses 32 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 13 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\DocuSign.msi
    1⤵
    • Badlisted process makes network request
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:4692
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3192
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3348
    • C:\Windows\System32\MsiExec.exe
      C:\Windows\System32\MsiExec.exe -Embedding 7E9B7B662536BB5C2EEA321F9E787037
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:4524
      • C:\Windows\system32\rundll32.exe
        rundll32.exe "C:\Windows\Installer\MSI5FBF.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240672781 2 Atera.Agent.Installer.Msi.Ca!Atera.Agent.Installer.Msi.Ca.CustomActions.GenerateAgentId
        3⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • Suspicious use of AdjustPrivilegeToken
        PID:3496
      • C:\Windows\system32\rundll32.exe
        rundll32.exe "C:\Windows\Installer\MSI60AA.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240672953 6 Atera.Agent.Installer.Msi.Ca!Atera.Agent.Installer.Msi.Ca.CustomActions.ShouldContinueInstallation
        3⤵
        • Badlisted process makes network request
        • Loads dropped DLL
        • Drops file in Windows directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1212
      • C:\Windows\system32\rundll32.exe
        rundll32.exe "C:\Windows\Installer\MSI7879.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240679046 10 Atera.Agent.Installer.Msi.Ca!Atera.Agent.Installer.Msi.Ca.CustomActions.ReportMsiInstallStart
        3⤵
        • Badlisted process makes network request
        • Loads dropped DLL
        • Drops file in Windows directory
        • Suspicious use of AdjustPrivilegeToken
        PID:3532
      • C:\Windows\system32\rundll32.exe
        rundll32.exe "C:\Windows\Installer\MSI7D6C.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240680296 15 Atera.Agent.Installer.Msi.Ca!Atera.Agent.Installer.Msi.Ca.CustomActions.DetectDotNetFrameworkRuntime
        3⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Time Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:1692
      • C:\Windows\system32\rundll32.exe
        rundll32.exe "C:\Windows\Installer\MSIAF9C.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240693156 31 Atera.Agent.Installer.Msi.Ca!Atera.Agent.Installer.Msi.Ca.CustomActions.ReportMsiInstallEnd
        3⤵
        • Badlisted process makes network request
        • Loads dropped DLL
        • Drops file in Windows directory
        PID:5492
    • C:\Windows\System32\MsiExec.exe
      C:\Windows\System32\MsiExec.exe -Embedding 485E342089C573E09A7F10381970B1E9 E Global\MSI0000
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:5360
      • C:\Program Files\ATERA Networks\AteraAgent\Agent\AteraAgent.exe
        "C:\Program Files\ATERA Networks\AteraAgent\Agent\AteraAgent.exe" init-settings --agent-id "652b678d-a9ff-4a64-ad36-d253d2bfdbd6" --account-id "1YQa15qEdxo/AZJk300eVU1MMDBQMDO2SuShs2nCsGA=" --environment "Production" --customer-id "1" --folder-id ""
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:5236
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" -ExecutionPolicy Bypass -NoProfile -Command "[Net.ServicePointManager]::SecurityProtocol=[Net.SecurityProtocolType]::Tls12;Invoke-WebRequest -Uri 'https://dot.net/v1/dotnet-install.ps1' -OutFile \"C:\Program Files\ATERA Networks\AteraAgent\Agent\dotnet-install.ps1\""
        3⤵
        • Badlisted process makes network request
        • Command and Scripting Interpreter: PowerShell
        • Modifies data under HKEY_USERS
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:5420
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" -ExecutionPolicy unrestricted -NoProfile -File "C:\Program Files\ATERA Networks\AteraAgent\Agent\dotnet-install.ps1" -Channel 8.0 -Runtime dotnet -InstallDir "C:\Program Files\ATERA Networks\AteraAgent\Agent\\.dotnet"
        3⤵
        • Badlisted process makes network request
        • Command and Scripting Interpreter: PowerShell
        • Drops file in Program Files directory
        • System Time Discovery
        • Modifies data under HKEY_USERS
        • Suspicious behavior: EnumeratesProcesses
        PID:5984
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious use of AdjustPrivilegeToken
    PID:2452
  • C:\Program Files\ATERA Networks\AteraAgent\Agent\AteraAgent.exe
    "C:\Program Files\ATERA Networks\AteraAgent\Agent\AteraAgent.exe"
    1⤵
    • Executes dropped EXE
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1604
    • C:\Windows\system32\cmd.exe
      "cmd.exe" /c "C:\Program Files\ATERA Networks\AteraAgent\Agent\.dotnet\dotnet.exe" --list-runtimes
      2⤵
      • System Time Discovery
      • Suspicious use of WriteProcessMemory
      PID:1428
      • C:\Program Files\ATERA Networks\AteraAgent\Agent\.dotnet\dotnet.exe
        "C:\Program Files\ATERA Networks\AteraAgent\Agent\.dotnet\dotnet.exe" --list-runtimes
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Time Discovery
        PID:4664

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        e585ef5.rbs

        • Path C:\Config.Msi\e585ef5.rbs
        • Size 7KB
        • SHA256 3fb0a14465918000bb3af0b0c83dfbe63811557478fdfc185b28876cc3090d27
        • MD5 SHA1 SHA512 SSDEEP TLSH

        dotnet.exe

        • Path C:\Program Files\ATERA Networks\AteraAgent\Agent\.dotnet\dotnet.exe
        • Size 153KB
        • SHA256 07f5d2cce93e97878a765fd81d1981acc3b21be0fdfb519cf0544ca2ae2d0ab5
        • MD5 SHA1 SHA512 SSDEEP TLSH

        hostfxr.dll

        • Path C:\Program Files\ATERA Networks\AteraAgent\Agent\.dotnet\host\fxr\8.0.27\hostfxr.dll
        • Size 357KB
        • SHA256 0a495d3a7befebf627a973760439da0f7f1f1667b99832f083664fac7641d2dc
        • MD5 SHA1 SHA512 SSDEEP TLSH

        .settings.json

        • Path C:\Program Files\ATERA Networks\AteraAgent\Agent\.settings.json
        • Size 179B
        • SHA256 14262dce17cefcf58b20f7f587ba2c37808b413782f8c95c9e69725dfa810395
        • MD5 SHA1 SHA512 TLSH

        AteraAgent.exe

        • Path C:\Program Files\ATERA Networks\AteraAgent\Agent\AteraAgent.exe
        • Size 21.1MB
        • SHA256 93d6fe2287fb4a0d5466a5b466bd1838d5ba53f6e90fae960a1c709dde52062b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        agent.cert.pfx

        • Path C:\Program Files\ATERA Networks\AteraAgent\Agent\certificates\production\agent.cert.pfx
        • Size 2KB
        • SHA256 a69eed051cc041cc8ad7d80e6a2732e1a9a2435cadfd1466bb4270e4fb0e4a43
        • MD5 SHA1 SHA512 TLSH

        dotnet-install.ps1

        • Path C:\Program Files\ATERA Networks\AteraAgent\Agent\dotnet-install.ps1
        • Size 74KB
        • SHA256 6585899aed55ff6ae13dbe1e8c3b878f2d00433520e7efbe250b75db948b7da9
        • MD5 SHA1 SHA512 SSDEEP TLSH

        698460A0B6E60F2F602361424D832905_8BB23D43DE574E82F2BEE0DF0EC47EEB

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\698460A0B6E60F2F602361424D832905_8BB23D43DE574E82F2BEE0DF0EC47EEB
        • Size 471B
        • SHA256 ad5b506e0a5c2db99afa567bbda74d3ca0fdec30b0185bcc2b9abf2f62e9ad7b
        • MD5 SHA1 SHA512 TLSH

        8EC9B1D0ABBD7F98B401D425828828CE_6FBFBE34ABAF2109B411B965FB39009E

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8EC9B1D0ABBD7F98B401D425828828CE_6FBFBE34ABAF2109B411B965FB39009E
        • Size 727B
        • SHA256 ae70e5ca10f73c994474e487f7f2186da679f9bc4bf65fc225c9e0266cf15eda
        • MD5 SHA1 SHA512 TLSH

        C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
        • Size 727B
        • SHA256 8360cc6f51681fb6e2af86774f6ac60fe7cf57a08070f59aafe50a9bf3172a56
        • MD5 SHA1 SHA512 TLSH

        698460A0B6E60F2F602361424D832905_8BB23D43DE574E82F2BEE0DF0EC47EEB

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\698460A0B6E60F2F602361424D832905_8BB23D43DE574E82F2BEE0DF0EC47EEB
        • Size 400B
        • SHA256 c217e78d2dc338feca35bddb6fd6a3e077a2a8e1659dd7448ac0f4f9e7a7374e
        • MD5 SHA1 SHA512 TLSH

        8EC9B1D0ABBD7F98B401D425828828CE_6FBFBE34ABAF2109B411B965FB39009E

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8EC9B1D0ABBD7F98B401D425828828CE_6FBFBE34ABAF2109B411B965FB39009E
        • Size 408B
        • SHA256 63819602f57ee5af37d44f36b00484f8cbbd4d7a39ec99c04faaf6f36840f257
        • MD5 SHA1 SHA512 TLSH

        C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
        • Size 412B
        • SHA256 6b5664ff9f9a1b257f40d87df4fc1e6f9ee6e10965eed432fb4dc133f57242ba
        • MD5 SHA1 SHA512 TLSH

        powershell.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
        • Size 2KB
        • SHA256 d69b7d84970cb04cd069299fd8aa9cef8394999588bead979104dc3cb743b4f2
        • MD5 SHA1 SHA512 TLSH

        rundll32.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\rundll32.exe.log
        • Size 847B
        • SHA256 16f4a7736a0c2aee54256d3d75ce4c0816fabf130b3b92340deca34c5f5fda43
        • MD5 SHA1 SHA512 TLSH

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 1081c6b484e3ce0572ea539029bc598ee7870cf099c5585bd52fbeee220c56b7
        • MD5 SHA1 SHA512 TLSH

        __PSScriptPolicyTest_3jpz0mpl.v2z.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3jpz0mpl.v2z.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512 TLSH

        MSI5FBF.tmp

        • Path C:\Windows\Installer\MSI5FBF.tmp
        • Size 340KB
        • SHA256 1997e4959d6c187e9ae35097b4cc0702e8a1564acb1dec7b080adcaa9b973fd0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        MSI7E87.tmp

        • Path C:\Windows\Installer\MSI7E87.tmp
        • Size 390KB
        • SHA256 7aacd4c18710e9bc4ff2034895a0a0c8f80f21809fb177d520e93f7688216e6d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        CustomAction.config

        • Path C:\Windows\Installer\SFXCA465E454E6047C51B6C46F5024B84094D\CustomAction.config
        • Size 956B
        • SHA256 2dbc73a3bc444a9119c9b5e20276698384d9ad9535a8a7547c44d1b9a8d67346
        • MD5 SHA1 SHA512 TLSH

        WixToolset.Dtf.WindowsInstaller.dll

        • Path C:\Windows\Installer\SFXCA465E454E6047C51B6C46F5024B84094D\WixToolset.Dtf.WindowsInstaller.dll
        • Size 193KB
        • SHA256 a614884ea627da1925131ebf41e8ae202caeac0fe543b86384f5eb2bfaf1aa75
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Atera.Agent.Installer.Msi.Ca.dll

        • Path C:\Windows\Installer\SFXCA52055C663A4BDA8856CFAE4954234A5D\Atera.Agent.Installer.Msi.Ca.dll
        • Size 59KB
        • SHA256 46a2844072f1be835debc683da08d7a37d866c6a4a2b1bff79f9e4bae60d9403
        • MD5 SHA1 SHA512 SSDEEP TLSH

        e585ef4.msi

        • Path C:\Windows\Installer\e585ef4.msi
        • Size 8.2MB
        • SHA256 cdf8e1012400896e603aceb7d9bce167b2eeb54f6b0f194f4603efbe2db001f0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        TmpB580.tmp

        • Path C:\Windows\SystemTemp\TmpB580.tmp
        • Size 3KB
        • SHA256 94739ca46676bd602a78671257fbfce39feaabc9664c6326bf4970a0108e3429
        • MD5 SHA1 SHA512 TLSH

        metadata-2

        • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
        • Size 24.6MB
        • SHA256 27556fe431c52fe06daed0fdb0783eed10ea972415681dd5a62a38fe4314a7bc
        • MD5 SHA1 SHA512 SSDEEP TLSH

        {6e2ec6fc-3c3f-463d-b26e-8d0ac43bada6}_OnDiskSnapshotProp

        • Path \??\Volume{a40cd035-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{6e2ec6fc-3c3f-463d-b26e-8d0ac43bada6}_OnDiskSnapshotProp
        • Size 6KB
        • SHA256 cccf90cc5fe744fdcdcea801939c339bfe4587f3982ecebcfc9cddb7ae60ef69
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/1212-59-0x000001BE883B0000-0x000001BE883EC000-memory.dmp

        memory/1212-58-0x000001BE88310000-0x000001BE88322000-memory.dmp

        memory/3496-37-0x000001E36FA90000-0x000001E36FAA4000-memory.dmp

        memory/3496-33-0x000001E36FA40000-0x000001E36FA74000-memory.dmp

        memory/5420-125-0x000001F9744D0000-0x000001F9744F2000-memory.dmp

        memory/5984-157-0x00000230A5430000-0x00000230A545A000-memory.dmp

        memory/5984-160-0x00000230A51E0000-0x00000230A51EA000-memory.dmp

        memory/5984-161-0x00000230A5440000-0x00000230A5452000-memory.dmp

        memory/5984-158-0x00000230A5430000-0x00000230A5454000-memory.dmp

        memory/5984-156-0x00000230A4EB0000-0x00000230A4EBA000-memory.dmp

        memory/5984-155-0x00000230A51F0000-0x00000230A52A3000-memory.dmp

        memory/5984-154-0x00000230A51D0000-0x00000230A51EC000-memory.dmp