Resubmissions

27/07/2026, 23:07

260727-23z5ysdg3610

27/07/2026, 23:00

260727-2zepvatxct10

27/07/2026, 22:41

260727-2mlbvsfj8110

Analysis

  • user interaction
    yes
  • max time kernel
    55s
  • max time network
    142s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20260513-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
  • submitted
    27/07/2026, 22:41

General

  • Target
    update.msi
  • Size 23.0MB
  • Sample260727-2mlbvsfj81
  • SHA256 3b2664238e6d4628ec13178b080d32c209a19d161fcbe88f86600ff5380753ba
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • overlord

C2
  • 45.158.8.213:5173

Signatures

  • Family: Overlord

    Overlord is an open-source Windows RAT written in Golang.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 4 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Looks up external IP address via web service 1 TTPs 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in Windows directory 8 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 8 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 22 IoCs
  • Suspicious use of SendNotifyMessage 20 IoCs
  • Suspicious use of WriteProcessMemory 3 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\update.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:2916
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3960
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:3688
      • C:\Users\Admin\AppData\Local\Temp\Adobe\vlc.exe
        "C:\Users\Admin\AppData\Local\Temp\Adobe\vlc.exe"
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1176
        • C:\Windows\system32\reg.exe
          "C:\Windows\system32\reg.exe" add "HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce" /v "svah896ewlrh09" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\Adobe\vlc.exe" /f
          3⤵
          • Adds Run key to start application
          PID:1208
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      • Suspicious use of AdjustPrivilegeToken
      PID:2892
    • C:\Users\Admin\AppData\Local\Temp\Adobe\vlc.exe
      C:\Users\Admin\AppData\Local\Temp\Adobe\vlc.exe
      1⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      PID:4172
    • C:\Windows\system32\taskmgr.exe
      "C:\Windows\system32\taskmgr.exe" /7
      1⤵
        PID:3048
      • C:\Windows\system32\taskmgr.exe
        "C:\Windows\system32\taskmgr.exe" /7
        1⤵
        • Checks SCSI registry key(s)
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:640
      • C:\Windows\system32\werfault.exe
        werfault.exe /hc /shared Global\300798e273fe40e5ba976ee2781cb2ca /t 3948 /p 3920
        1⤵
          PID:1888
        • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
          "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
          1⤵
            PID:1328
          • C:\Windows\system32\werfault.exe
            werfault.exe /hc /shared Global\feb6f95f5231477396fd74b8caa3869d /t 5428 /p 1328
            1⤵
              PID:5240
            • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
              "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
              1⤵
                PID:3248

              Network

                    MITRE ATT&CK Enterprise v16

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    e58511a.rbs

                    • Path C:\Config.Msi\e58511a.rbs
                    • Size 8KB
                    • SHA256 e05f38108702c36370dce72b1f9e60ba2e72fc51ae0adc29daebf47deac8fac8
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    microsoft.windows[1].xml

                    • Path C:\Users\Admin\AppData\Local\Packages\microsoft.windows.search_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\SV1VWVMC\microsoft.windows[1].xml
                    • Size 1KB
                    • SHA256 4e2eeb9de344a07d658788738d8516373416040d9dbd0c577269c653fd37dd22
                    • MD5 SHA1 SHA512 TLSH

                    libvlc.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\Adobe\libvlc.dll
                    • Size 34.1MB
                    • SHA256 773f4d86c31436a134a32a930e6180db34f5227e50d910a79cb9b9a1907cd87b
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    vlc.exe

                    • Path C:\Users\Admin\AppData\Local\Temp\Adobe\vlc.exe
                    • Size 1021KB
                    • SHA256 bfa5740f028a8f310ca01c779bbc5f2f1b435c41539c54de592f715bb0c10389
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    last-crash.json

                    • Path C:\Users\Admin\AppData\Local\Temp\last-crash.json
                    • Size 172B
                    • SHA256 f97c4fd64eb449478eac91c7435c573ae691329f5b2ca16d5ffff670f4d271ef
                    • MD5 SHA1 SHA512 TLSH

                    e585119.msi

                    • Path C:\Windows\Installer\e585119.msi
                    • Size 23.0MB
                    • SHA256 3b2664238e6d4628ec13178b080d32c209a19d161fcbe88f86600ff5380753ba
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    metadata-2

                    • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
                    • Size 24.0MB
                    • SHA256 e18be6792c0a348f0f0b8db9fb6265be6968ee8413c00311b0a591ca4226b7d2
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    {28b68e3d-5078-4738-8cb9-76afdc40babc}_OnDiskSnapshotProp

                    • Path \??\Volume{574c9264-0000-0000-0000-d08302000000}\System Volume Information\SPP\OnlineMetadataCache\{28b68e3d-5078-4738-8cb9-76afdc40babc}_OnDiskSnapshotProp
                    • Size 6KB
                    • SHA256 a2c64c03e60b4fdf3ae2a33a160a5564ad4b44d2233337f0f92645890b60f4dc
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    memory/640-4135-0x00000267E2F50000-0x00000267E2F51000-memory.dmp

                    memory/640-4443-0x00000267E2F50000-0x00000267E2F51000-memory.dmp

                    memory/640-4136-0x00000267E2F50000-0x00000267E2F51000-memory.dmp

                    memory/640-4133-0x00000267E2F50000-0x00000267E2F51000-memory.dmp

                    memory/640-4442-0x00000267E2F50000-0x00000267E2F51000-memory.dmp

                    memory/640-4448-0x00000267E2F50000-0x00000267E2F51000-memory.dmp

                    memory/640-4447-0x00000267E2F50000-0x00000267E2F51000-memory.dmp

                    memory/640-4446-0x00000267E2F50000-0x00000267E2F51000-memory.dmp

                    memory/640-4445-0x00000267E2F50000-0x00000267E2F51000-memory.dmp

                    memory/640-4444-0x00000267E2F50000-0x00000267E2F51000-memory.dmp

                    memory/1176-10503-0x0000019FC1C50000-0x0000019FC4970000-memory.dmp

                    memory/1176-10669-0x0000019FC1C50000-0x0000019FC4970000-memory.dmp

                    memory/1176-2450-0x0000019FBA470000-0x0000019FBC69E000-memory.dmp

                    memory/1176-27-0x00007FFA28AF0000-0x00007FFA28CE8000-memory.dmp

                    memory/1176-29-0x00007FF795910000-0x00007FF795A13000-memory.dmp

                    memory/1176-30-0x0000019FBA470000-0x0000019FBC69E000-memory.dmp

                    memory/1176-10767-0x0000019FBA470000-0x0000019FBC69E000-memory.dmp

                    memory/1176-6728-0x0000019FBA470000-0x0000019FBC69E000-memory.dmp

                    memory/1176-10032-0x0000019FC1C50000-0x0000019FC4970000-memory.dmp

                    memory/1176-10358-0x0000019FC1C50000-0x0000019FC4970000-memory.dmp

                    memory/1176-28-0x00007FFA26310000-0x00007FFA26606000-memory.dmp

                    memory/1176-10504-0x0000019FC1C50000-0x0000019FC4970000-memory.dmp

                    memory/1328-12940-0x000002D3605B0000-0x000002D3605D0000-memory.dmp

                    memory/1328-13072-0x000002D375380000-0x000002D375480000-memory.dmp

                    memory/1328-12804-0x000002CB59CA0000-0x000002CB59DA0000-memory.dmp

                    memory/1328-12936-0x000002D3605D0000-0x000002D3605F0000-memory.dmp

                    memory/1328-12895-0x000002D360590000-0x000002D3605B0000-memory.dmp

                    memory/3248-13408-0x000001993BAA0000-0x000001993BBA0000-memory.dmp

                    memory/3248-13350-0x000001993BDF0000-0x000001993BEF0000-memory.dmp

                    memory/3248-13336-0x0000019929B20000-0x0000019929B40000-memory.dmp

                    memory/3248-13335-0x0000019929B40000-0x0000019929B60000-memory.dmp

                    memory/3248-13320-0x0000019929B00000-0x0000019929B20000-memory.dmp

                    memory/4172-13276-0x000002224C690000-0x000002224F3B0000-memory.dmp

                    memory/4172-13293-0x0000022245050000-0x000002224727E000-memory.dmp

                    memory/4172-13270-0x000002224C690000-0x000002224F3B0000-memory.dmp

                    memory/4172-6111-0x0000022245050000-0x000002224727E000-memory.dmp

                    memory/4172-13281-0x000002224C690000-0x000002224F3B0000-memory.dmp

                    memory/4172-13284-0x0000022245050000-0x000002224727E000-memory.dmp

                    memory/4172-13282-0x000002224C690000-0x000002224F3B0000-memory.dmp

                    memory/4172-13285-0x000002224C690000-0x000002224F3B0000-memory.dmp

                    memory/4172-13289-0x000002224C690000-0x000002224F3B0000-memory.dmp

                    memory/4172-13262-0x0000022249CE0000-0x000002224A9A6000-memory.dmp

                    memory/4172-2577-0x00007FFA28AF0000-0x00007FFA28CE8000-memory.dmp

                    memory/4172-2581-0x00007FFA26310000-0x00007FFA26606000-memory.dmp

                    memory/4172-6110-0x00007FF795910000-0x00007FF795A13000-memory.dmp

                    memory/4172-11679-0x0000022245050000-0x000002224727E000-memory.dmp

                    memory/4172-11176-0x0000022245050000-0x000002224727E000-memory.dmp

                    memory/4172-10987-0x0000022245050000-0x000002224727E000-memory.dmp

                    memory/4172-10774-0x0000022245050000-0x000002224727E000-memory.dmp