Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    03/08/2026, 12:17

General

  • Target
    zoom.us.invite.msi
  • Size 6.8MB
  • Sample260803-pghbsshc86
  • SHA256 2b462d51032bd76e4f2f9498546e1f18e1510af71231dabf34ac3d5b40a4743c
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 8 IoCs
  • Badlisted process makes network request 7 IoCs

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

  • 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 14 IoCs
  • Drops file in Windows directory 64 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Using powershell.exe command.

  • 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 7 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.

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies registry class 46 IoCs
  • Suspicious behavior: EnumeratesProcesses 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 10 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\zoom.us.invite.msi
    1⤵
    • Badlisted process makes network request
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:2100
  • 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:1708
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:976
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 0274D75FFEF1A5E9FD59E64FB034B53A
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:544
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding CDE29300374A40C09D6346A1CF9625F9 E Global\MSI0000
      2⤵
      • Loads dropped DLL
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:4940
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding A9E8937B3708857E086A5122E62547A3 E Global\MSI0000
      2⤵
      • Loads dropped DLL
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      PID:1960
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious use of AdjustPrivilegeToken
    PID:5040
  • C:\Windows\Action1\action1_agent.exe
    C:\Windows\Action1\action1_agent.exe service
    1⤵
    • Executes dropped EXE
    • Drops file in System32 directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies data under HKEY_USERS
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3336
    • C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
      C:\Windows\sysnative\WindowsPowerShell\v1.0\powershell.exe -NoLogo -NonInteractive -NoProfile -ExecutionPolicy Bypass -Command "$ExecutionContext.SessionState.LanguageMode"
      2⤵
      • Drops file in System32 directory
      • Command and Scripting Interpreter: PowerShell
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3844
    • C:\Windows\SysWOW64\msiexec.exe
      C:\Windows\system32\msiexec.exe /I "C:\Windows\Action1\installer_cache\action1_agent_6.0.msi" /quiet /qn /norestart /lv* "C:\Windows\Action1\logs\agent_install_1785759562.log" REINSTALLMODE=amus ALLOWDOWNGRADE=1
      2⤵
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      PID:4304
  • C:\Windows\Action1\action1_agent.exe
    C:\Windows\Action1\action1_agent.exe service
    1⤵
    • Executes dropped EXE
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies data under HKEY_USERS
    • Suspicious use of WriteProcessMemory
    PID:4524
    • C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
      C:\Windows\sysnative\WindowsPowerShell\v1.0\powershell.exe -NoLogo -NonInteractive -NoProfile -ExecutionPolicy Bypass -Command "$ExecutionContext.SessionState.LanguageMode"
      2⤵
      • Drops file in System32 directory
      • Command and Scripting Interpreter: PowerShell
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      PID:2676
    • C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\sysnative\WindowsPowerShell\v1.0\powershell.exe" -NoLogo -NonInteractive -NoProfile -ExecutionPolicy Bypass -Command -
      2⤵
      • Drops file in System32 directory
      • Drops file in Windows directory
      • Command and Scripting Interpreter: PowerShell
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3428
      • C:\Windows\Action1\action1_agent.exe
        "C:\Windows\Action1\action1_agent.exe" loggedonuser
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:3528
    • C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\sysnative\WindowsPowerShell\v1.0\powershell.exe" -NoLogo -NonInteractive -NoProfile -ExecutionPolicy Bypass -Command -
      2⤵
      • Drops file in System32 directory
      • Command and Scripting Interpreter: PowerShell
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      PID:1880

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        e58ce87.rbs

        • Path C:\Config.Msi\e58ce87.rbs
        • Size 240KB
        • SHA256 d5f4f32c2ecf1d6151ba86b34c5ebcb46b61edb02b3493baf1a6d821e768a3a1
        • MD5 SHA1 SHA512 SSDEEP TLSH

        e58ce88.rbs

        • Path C:\Config.Msi\e58ce88.rbs
        • Size 7KB
        • SHA256 fa4b1def95332b15fe226c4c762ebfc0b0f8096d21118fdd8df73f65e6ae5948
        • MD5 SHA1 SHA512 SSDEEP TLSH

        e58ce8d.rbs

        • Path C:\Config.Msi\e58ce8d.rbs
        • Size 246KB
        • SHA256 4e753d2081d19f9e22a32464b0388204f9d83e8fe7e45da10d15628af00a975b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        e58ce94.rbs

        • Path C:\Config.Msi\e58ce94.rbs
        • Size 8KB
        • SHA256 10b0d5a2fc0031ad25b145402c48ccf01cba0cc90a7e3db86a8158178f5bef43
        • MD5 SHA1 SHA512 SSDEEP TLSH

        e58ce97.rbf

        • Path C:\Config.Msi\e58ce97.rbf
        • Size 3B
        • SHA256 13bf7b3039c63bf5a50491fa3cfd8eb4e699d1ba1436315aef9cbe5711530354
        • MD5 SHA1 SHA512

        e58ce98.rbs

        • Path C:\Config.Msi\e58ce98.rbs
        • Size 1KB
        • SHA256 be89c2bb4b174d45f8071403f5de23ec9c3ce31a2c114a40a2c66fdebc077453
        • MD5 SHA1 SHA512 TLSH

        e58ce99.rbs

        • Path C:\Config.Msi\e58ce99.rbs
        • Size 7KB
        • SHA256 40c9b6f586456272fffcdfdbbbf698664202d18c37d10089d013619509dabcc1
        • MD5 SHA1 SHA512 SSDEEP TLSH

        1D3A6ADE28D2362383293C423AFF660E

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\1D3A6ADE28D2362383293C423AFF660E
        • Size 751B
        • SHA256 1a2623a69128048a46f6cee2a0a3ec6953476cc9e94bd721d709188d449158a2
        • MD5 SHA1 SHA512 TLSH

        3AA0DCD5A74331FBD6F344550EC48B87_FAB5A9F6C6BE3394975FF948CA40CA87

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\3AA0DCD5A74331FBD6F344550EC48B87_FAB5A9F6C6BE3394975FF948CA40CA87
        • Size 637B
        • SHA256 52d4a6aa6f06cde9f5c41cb68a301dcba69fc0e1a0baf4f0f78db793459f4ef5
        • MD5 SHA1 SHA512 TLSH

        B2FAF7692FD9FFBD64EDE317E42334BA_93702E680A5530C052C8D2BA33A2225F

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_93702E680A5530C052C8D2BA33A2225F
        • Size 1KB
        • SHA256 a0d6ce27684a757d37eab3719f249b191a0479b5e63a1ec2be4bd6779ff85ad4
        • MD5 SHA1 SHA512 TLSH

        1D3A6ADE28D2362383293C423AFF660E

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\1D3A6ADE28D2362383293C423AFF660E
        • Size 320B
        • SHA256 0b264f1a43a0333c3e5ae3a764d3baa824935eef0e2e8d51b55e65e8f1568beb
        • MD5 SHA1 SHA512 TLSH

        3AA0DCD5A74331FBD6F344550EC48B87_FAB5A9F6C6BE3394975FF948CA40CA87

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\3AA0DCD5A74331FBD6F344550EC48B87_FAB5A9F6C6BE3394975FF948CA40CA87
        • Size 488B
        • SHA256 67fe94dcb9323b66c847b71e7f4be6987a5beaa7ee3d0ecc26454210766f5617
        • MD5 SHA1 SHA512 TLSH

        B2FAF7692FD9FFBD64EDE317E42334BA_93702E680A5530C052C8D2BA33A2225F

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_93702E680A5530C052C8D2BA33A2225F
        • Size 482B
        • SHA256 1e70aa556a3845e75878486d904067d7eb81ecb3f0628c1176f32700c4a1d5f6
        • MD5 SHA1 SHA512 TLSH

        7z.dll

        • Path C:\Windows\Action1\7z.dll
        • Size 1.3MB
        • SHA256 872a7df979d45605d4247a9925871077ca84ed6cf78769037fb0d94ab788d9b5
        • MD5 SHA1 SHA512 SSDEEP TLSH

        action1_agent.exe

        • Path C:\Windows\Action1\action1_agent.exe
        • Size 8.9MB
        • SHA256 f30ed43c6529409197a01e6b80b6438e23e32aba8cad3486dc079e995db0f0aa
        • MD5 SHA1 SHA512 SSDEEP TLSH

        action1_agent.exe

        • Path C:\Windows\Action1\action1_agent.exe
        • Size 8.9MB
        • SHA256 941695d20d82dd5d62f74b0111feb23720637202f6c797df2a02e2cb6cb6e8e3
        • MD5 SHA1 SHA512 SSDEEP TLSH

        action1_agent.exe.connection

        • Path C:\Windows\Action1\action1_agent.exe.connection
        • Size 2B
        • SHA256 565339bc4d33d72817b583024112eb7f5cdf3e5eef0252d6ec1b9c9a94e12bb3
        • MD5 SHA1 SHA512

        action1_agent.exe.update_state

        • Path C:\Windows\Action1\action1_agent.exe.update_state
        • Size 1B
        • SHA256 7902699be42c8a8e46fbbb4501726517e86b22c56a189f7625a6da49081b2451
        • MD5 SHA1 SHA512

        action1_remote.exe

        • Path C:\Windows\Action1\action1_remote.exe
        • Size 1.5MB
        • SHA256 d5d0c44dd03f1952d388d547e6e1ee021978bd1641b5b8ec49d49e8b7d53e909
        • MD5 SHA1 SHA512 SSDEEP TLSH

        advanced_settings.json

        • Path C:\Windows\Action1\advanced_settings.json
        • Size 54KB
        • SHA256 791e94f91d48f38bd18cbc61001edcef2edfbcd49524ce43b3cdd7d6e4fe9aed
        • MD5 SHA1 SHA512 SSDEEP TLSH

        agent_downgrade.version_pair

        • Path C:\Windows\Action1\agent_downgrade.version_pair
        • Size 71B
        • SHA256 74a0de7cf5cb91f0bde4eb93ddebd02f3c9b9580f6d473b4dabe7567395fda70
        • MD5 SHA1 SHA512 TLSH

        first_install

        • Path C:\Windows\Action1\first_install
        • Size 50B
        • SHA256 04fd07a14659ab6a68437093f676d36bb159d46fc082212e1701cbd63ceb3fce
        • MD5 SHA1 SHA512 TLSH

        action1_agent_6.0.msi

        • Path C:\Windows\Action1\installer_cache\action1_agent_6.0.msi
        • Size 6.8MB
        • SHA256 4d5dc04c53e0ef25138e13559984491dce66e6661f0daf0705e3d425fc772a1c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        agent_install_1785759562.log

        • Path C:\Windows\Action1\logs\agent_install_1785759562.log
        • Size 1KB
        • SHA256 fbed11a8391a0f2acdd947e9d02079fdcfa3da2b789ed3650722a0c4aa496903
        • MD5 SHA1 SHA512 TLSH

        sas.dll

        • Path C:\Windows\Action1\sas.dll
        • Size 8KB
        • SHA256 996b01e15f85e165899630721a141b178a9c372b6e878012180ec9e9d4e7bd06
        • MD5 SHA1 SHA512 SSDEEP TLSH

        MSI2ECD.tmp

        • Path C:\Windows\Installer\MSI2ECD.tmp
        • Size 387KB
        • SHA256 ca5f0275e70ec5ba65b74c3da74f489018bc143c4c405fd8bbc6519eadac2a22
        • MD5 SHA1 SHA512 SSDEEP TLSH

        MSICFCE.tmp

        • Path C:\Windows\Installer\MSICFCE.tmp
        • Size 385KB
        • SHA256 23a1c772b870ffcef49e3b3a20d668f11753d3e52c696d787532af0c7eec43ba
        • MD5 SHA1 SHA512 SSDEEP TLSH

        MSID1E3.tmp

        • Path C:\Windows\Installer\MSID1E3.tmp
        • Size 234KB
        • SHA256 78860e15e474cc2af7ad6e499a8971b6b8197afb8e49a1b9eaaa392e4378f3a5
        • MD5 SHA1 SHA512 SSDEEP TLSH

        e58ce86.msi

        • Path C:\Windows\Installer\e58ce86.msi
        • Size 6.8MB
        • SHA256 2b462d51032bd76e4f2f9498546e1f18e1510af71231dabf34ac3d5b40a4743c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ProductIcon

        • Path C:\Windows\Installer\{400F3B96-927E-476D-860A-3C97BC860ADF}\ProductIcon
        • Size 32KB
        • SHA256 7a214ccfe309e4c0c83f40d9b7c92e3d41206db734401e7227ef10b38064ca9d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        __PSScriptPolicyTest_w2l0zec2.0u5.ps1

        • Path C:\Windows\Temp\__PSScriptPolicyTest_w2l0zec2.0u5.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512 TLSH

        powershell.exe.log

        • Path C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
        • Size 2KB
        • SHA256 8ef7a682dfd99ff5b7e9de0e1be43f0016d68695a43c33c028af2635cc15ecfe
        • MD5 SHA1 SHA512 TLSH

        StartupProfileData-NonInteractive

        • Path C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 64B
        • SHA256 46e488628e5348c9c4dfcdeed5a91747eae3b3aa49ae1b94d37173b6609efa0e
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 64B
        • SHA256 a7de5177c68a64bd48b36d49e2853799f4ebcfa8e4761f7cc472f333dc5f65cf
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 726d2b3a5003e478f61d3626a078477d2ce3caa24520bafefc1750edd68ef617
        • MD5 SHA1 SHA512 TLSH

        metadata-2

        • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
        • Size 24.1MB
        • SHA256 d76793394b9aabe8a451d5116129fc3d3586740ec54009de029e9b584b6b7f46
        • MD5 SHA1 SHA512 SSDEEP TLSH

        {f9f00e6b-51e8-4246-921b-01ae34c81cbc}_OnDiskSnapshotProp

        • Path \??\Volume{cd0aa2ae-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{f9f00e6b-51e8-4246-921b-01ae34c81cbc}_OnDiskSnapshotProp
        • Size 6KB
        • SHA256 7e0182adee99e66efba03601fa959b197e3bc953c0ba7c6f1594fd85f2bb0c4a
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/1880-357-0x0000020D9A440000-0x0000020D9A45C000-memory.dmp

        memory/1880-358-0x0000020D9A460000-0x0000020D9A515000-memory.dmp

        memory/1880-359-0x0000020D9A520000-0x0000020D9A52A000-memory.dmp

        memory/1880-360-0x0000020D9A6A0000-0x0000020D9A6CA000-memory.dmp

        memory/1880-361-0x0000020D9A6A0000-0x0000020D9A6C4000-memory.dmp

        memory/3844-62-0x000001711C080000-0x000001711C0A2000-memory.dmp