Overview

overview

10

Static

static

3

DeltaLoader.exe

windows10-ltsc 2021-x64

10

DeltaLoader.exe

windows11-21h2-x64

10

Resubmissions

05-02-2025 17:47

250205-wc29qsxlat 10

05-02-2025 17:01

250205-vjss7sxpan 10

Analysis

  • max time kernel
    286s
  • max time network
    202s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    05-02-2025 17:01

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General

  • Target

    DeltaLoader.exe

  • Size

    44KB

  • MD5

    50197e452db64d2f815c89ccc3205a29

  • SHA1

    ae614db915c947b4d59ffad9c70f30796746f9b9

  • SHA256

    9d84579a8ef038b25ad305a1109d0b00ae98a4fb23e7de01753697843f779983

  • SHA512

    366ca9fd72578fa78ca87bb5988854d5c0504307cc02cb0169aac089220981f27f52031547a4aa4a1877585802963141e1454ab542a3c7d68531708d8ca54cde

  • SSDEEP

    384:mtSEAIdjiPyK0aq3v3qyMyc0nhjS5Bw5mwMl9eLKLkTQC9LWQyyLnguBih5:KSnIMHjqiecWBCw5NQMekTQ2yqnguy5

Score
10/10
discoveryexecutionpersistenceprivilege_escalation

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
    persistence
  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    persistence
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    execution
  • Event Triggered Execution: AppInit DLLs 1 TTPs

    Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.

    persistenceprivilege_escalation
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Enumerates connected drives 3 TTPs 2 IoCs

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

  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

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

    discovery
  • Checks SCSI registry key(s) 3 TTPs 58 IoCs

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

  • Delays execution with timeout.exe 2 IoCs
    defense_evasion
  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Kills process with taskkill 1 IoCs
    defense_evasion
  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
    adwarespyware
  • Modifies registry class 46 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 42 IoCs
  • Suspicious use of FindShellTrayWindow 37 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 41 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence
  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\DeltaLoader.exe
    "C:\Users\Admin\AppData\Local\Temp\DeltaLoader.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:228
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command "Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\'"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3032
    • C:\Users\Admin\AppData\Local\Temp\ThirdPartyGUI.exe
      "C:\Users\Admin\AppData\Local\Temp\ThirdPartyGUI.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Executes dropped EXE
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3404
      • C:\Windows\SYSTEM32\CMD.exe
        "CMD" netsh advfirewall firewall add rule name="/48J0ctg08LB0q" dir=in action=allow program="C:\Windows\Web\xdwdDelta.exe" enable=yes & exit
        3⤵
          PID:4720
        • C:\Windows\SYSTEM32\cmd.exe
          "cmd" /c schtasks /create /f /sc minute /mo 1 /tn "Microsoft\Windows\RuntimeOpen" /tr "C:\Windows\Web\xdwdDelta.exe" /RL HIGHEST & exit
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1336
          • C:\Windows\system32\schtasks.exe
            schtasks /create /f /sc minute /mo 1 /tn "Microsoft\Windows\RuntimeOpen" /tr "C:\Windows\Web\xdwdDelta.exe" /RL HIGHEST
            4⤵
            • Scheduled Task/Job: Scheduled Task
            PID:1436
        • C:\Windows\SYSTEM32\cmd.exe
          "cmd" /c schtasks /create /f /sc minute /mo 30 /tn "Microsoft\Windows\Setup" /tr "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCookies\Web\xdwdDeltaOpen.exe" /RL HIGHEST & exit
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:2200
          • C:\Windows\system32\schtasks.exe
            schtasks /create /f /sc minute /mo 30 /tn "Microsoft\Windows\Setup" /tr "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCookies\Web\xdwdDeltaOpen.exe" /RL HIGHEST
            4⤵
            • Scheduled Task/Job: Scheduled Task
            PID:4880
        • C:\Windows\Web\xdwdDelta.exe
          "C:\Windows\Web\xdwdDelta.exe"
          3⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2168
          • C:\Windows\SYSTEM32\cmd.exe
            "cmd" /c schtasks /create /f /sc minute /mo 30 /tn "Microsoft\Windows\Setup" /tr "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCookies\Web\xdwdDeltaOpen.exe" /RL HIGHEST & exit
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:2092
            • C:\Windows\system32\schtasks.exe
              schtasks /create /f /sc minute /mo 30 /tn "Microsoft\Windows\Setup" /tr "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCookies\Web\xdwdDeltaOpen.exe" /RL HIGHEST
              5⤵
              • Scheduled Task/Job: Scheduled Task
              PID:2508
          • C:\Windows\SYSTEM32\CMD.exe
            "CMD" /c schtasks /deleTe /F /Tn "Microsoft\Windows\RuntimeOpen" & exit& exit
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:4536
            • C:\Windows\system32\schtasks.exe
              schtasks /deleTe /F /Tn "Microsoft\Windows\RuntimeOpen"
              5⤵
                PID:2028
            • C:\Windows\SYSTEM32\CMD.exe
              "CMD" /c schtasks /deleTe /F /Tn "Microsoft\Windows\Setup" & exit& exit
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:1912
              • C:\Windows\system32\schtasks.exe
                schtasks /deleTe /F /Tn "Microsoft\Windows\Setup"
                5⤵
                  PID:1612
              • C:\Windows\SYSTEM32\cmd.exe
                "cmd" /C taskkill /im explorer.exe /f && TimeOut 2 && start explorer.exe
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:4288
                • C:\Windows\system32\taskkill.exe
                  taskkill /im explorer.exe /f
                  5⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1244
                • C:\Windows\system32\timeout.exe
                  TimeOut 2
                  5⤵
                  • Delays execution with timeout.exe
                  PID:788
                • C:\Windows\explorer.exe
                  explorer.exe
                  5⤵
                  • Boot or Logon Autostart Execution: Active Setup
                  • Enumerates connected drives
                  • Checks SCSI registry key(s)
                  • Modifies registry class
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of FindShellTrayWindow
                  • Suspicious use of SendNotifyMessage
                  • Suspicious use of SetWindowsHookEx
                  PID:4656
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3DA0.tmp.bat""
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:4996
                • C:\Windows\system32\timeout.exe
                  timeout 10 "C:\Windows\Web"DEL "xdwdDelta.exe" /f /qCD "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCookies\Web"DEL "xdwdDeltaOpen.exe" /f /qCD "C:\Windows"DEL "xdwd.dll" /f /qCD "C:\Users\Admin\AppData\Local\Temp"DEL "tmp3DA0.tmp.bat" /f /q
                  5⤵
                  • Delays execution with timeout.exe
                  PID:4072
        • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
          "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
          1⤵
          • Enumerates system info in registry
          • Modifies Internet Explorer settings
          • Modifies registry class
          • Suspicious use of SetWindowsHookEx
          PID:4472
        • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
          "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
          1⤵
          • Modifies registry class
          • Suspicious use of SetWindowsHookEx
          PID:3140

        Network

        MITRE ATT&CK Enterprise v15

        Reconnaissance

        Resource Development

        Initial Access

        Execution

        Command and Scripting Interpreter

        1
        T1059

        PowerShell

        1
        T1059.001

        Scheduled Task/Job

        1
        T1053

        Scheduled Task

        1
        T1053.005

        Persistence

        Boot or Logon Autostart Execution

        2
        T1547

        Active Setup

        1
        T1547.014

        Winlogon Helper DLL

        1
        T1547.004

        Event Triggered Execution

        1
        T1546

        AppInit DLLs

        1
        T1546.010

        Scheduled Task/Job

        1
        T1053

        Scheduled Task

        1
        T1053.005

        Privilege Escalation

        Boot or Logon Autostart Execution

        2
        T1547

        Active Setup

        1
        T1547.014

        Winlogon Helper DLL

        1
        T1547.004

        Event Triggered Execution

        1
        T1546

        AppInit DLLs

        1
        T1546.010

        Scheduled Task/Job

        1
        T1053

        Scheduled Task

        1
        T1053.005

        Defense Evasion

        Modify Registry

        3
        T1112

        Credential Access

        Discovery

        Peripheral Device Discovery

        2
        T1120

        Query Registry

        4
        T1012

        System Information Discovery

        4
        T1082

        System Location Discovery

        1
        T1614

        System Language Discovery

        1
        T1614.001

        Lateral Movement

        Collection

        Command and Control

        Exfiltration

        Impact

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\VV0OCZTA\www.bing[1].xml
          Filesize

          17KB

          MD5

          c01a67bbf8d6927e2f6161d1255c6583

          SHA1

          4c70c172fc0a00204bf6d11a34beadd861901f7f

          SHA256

          c733f5265713bfcc044725348ba1262842d237983dc33bff94980d7c09ac80bc

          SHA512

          e2c56f6c9bd46c9e724d2dbb1a6967271957406a522c65a371f89c077ea2ccb76ebe799d942dc744560044e30053d92e5f30e36c590a3f7997a94e9588bb1c08

          Download Submit

        • C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\VV0OCZTA\www.bing[1].xml
          Filesize

          31KB

          MD5

          95a65e11ce837dbf7db973b96cfeb0ab

          SHA1

          f8d9430ef8fc89a99e469de9ac4c86c0e11b5744

          SHA256

          37b13c34a8b0df0b0c1b013508b0234256c3cfacb33d8c1da2926b723519f665

          SHA512

          f885493a46e2bb759544097141e4f3bd5879cf565f18958914c4ba934a5b6335ade891ec1ed8300d4f966988a0fe3861c5ef91868483e320c027fddcdabe15e2

          Download Submit

        • C:\Users\Admin\AppData\Local\Temp\ThirdPartyGUI.exe
          Filesize

          524KB

          MD5

          96df2c150cb74469cc7c9cb0a02ae03a

          SHA1

          e01c55d58423d9bde789adb67e49d1d0ab6c4b82

          SHA256

          8ac9d08ab8d9c957ad17c2fc88a52ce95ecf212a56c6371e9b28584d97e00017

          SHA512

          b7ebdc92c303d1282495a315df618deb228718fd45ba21d053e75b0bd93c4f0054220e4abc083d8828f3cd826bb05cfc75313dbc9123499659b43cc3a2a282a7

          Download Submit

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ja3bol2i.eoz.ps1
          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

          Download Submit

        • C:\Users\Admin\AppData\Local\Temp\tmp3DA0.tmp.bat
          Filesize

          256B

          MD5

          fa7048e47bb417050b4fc8dd63023c58

          SHA1

          54594198355dca4c2987eb85d269d6b8593979f9

          SHA256

          e77aee4830992cefff0cb284b1b3475f215aab417a4491574cd9b40d388b005e

          SHA512

          9a81613b5f6ad3961a00622121b6d697ca47331e80db1095b9adce5b12576f1d63be754f0d74fb4fdbb62e708a048fd8d7e4703788f277b78db7cea9ce315abd

          Download Submit

        • C:\Windows\xdwd.dll
          Filesize

          136KB

          MD5

          16e5a492c9c6ae34c59683be9c51fa31

          SHA1

          97031b41f5c56f371c28ae0d62a2df7d585adaba

          SHA256

          35c8d022e1d917f1aabdceae98097ccc072161b302f84c768ca63e4b32ac2b66

          SHA512

          20fd369172ef5e3e2fde388666b42e8fe5f0c2bfa338c0345f45e98af6561a249ba3ecc48c3f16efcc73f02ecb67b3ddb1e2e8f0e77d18fa00ac34e6379e50b6

          Download Submit

        • memory/228-3-0x0000000074B2E000-0x0000000074B2F000-memory.dmp

          Filesize

          4KB

          Download

        • memory/228-5-0x0000000074B20000-0x00000000752D1000-memory.dmp

          Filesize

          7.7MB

          Download

        • memory/228-4-0x00000000081E0000-0x0000000008246000-memory.dmp

          Filesize

          408KB

          Download

        • memory/228-84-0x0000000074B20000-0x00000000752D1000-memory.dmp

          Filesize

          7.7MB

          Download

        • memory/228-0-0x0000000074B2E000-0x0000000074B2F000-memory.dmp

          Filesize

          4KB

          Download

        • memory/228-64-0x0000000074B20000-0x00000000752D1000-memory.dmp

          Filesize

          7.7MB

          Download

        • memory/228-2-0x0000000003120000-0x000000000312E000-memory.dmp

          Filesize

          56KB

          Download

        • memory/228-1-0x0000000000DC0000-0x0000000000DD0000-memory.dmp

          Filesize

          64KB

          Download

        • memory/3032-42-0x0000000006F80000-0x0000000006F9A000-memory.dmp

          Filesize

          104KB

          Download

        • memory/3032-48-0x00000000072D0000-0x00000000072EA000-memory.dmp

          Filesize

          104KB

          Download

        • memory/3032-25-0x0000000005E20000-0x0000000005E6C000-memory.dmp

          Filesize

          304KB

          Download

        • memory/3032-27-0x0000000070490000-0x00000000704DC000-memory.dmp

          Filesize

          304KB

          Download

        • memory/3032-26-0x0000000006BF0000-0x0000000006C24000-memory.dmp

          Filesize

          208KB

          Download

        • memory/3032-36-0x0000000006E30000-0x0000000006E4E000-memory.dmp

          Filesize

          120KB

          Download

        • memory/3032-38-0x0000000006E50000-0x0000000006EF4000-memory.dmp

          Filesize

          656KB

          Download

        • memory/3032-37-0x0000000074B20000-0x00000000752D1000-memory.dmp

          Filesize

          7.7MB

          Download

        • memory/3032-39-0x0000000074B20000-0x00000000752D1000-memory.dmp

          Filesize

          7.7MB

          Download

        • memory/3032-40-0x0000000074B20000-0x00000000752D1000-memory.dmp

          Filesize

          7.7MB

          Download

        • memory/3032-23-0x0000000005770000-0x0000000005AC7000-memory.dmp

          Filesize

          3.3MB

          Download

        • memory/3032-41-0x00000000075D0000-0x0000000007C4A000-memory.dmp

          Filesize

          6.5MB

          Download

        • memory/3032-43-0x0000000007000000-0x000000000700A000-memory.dmp

          Filesize

          40KB

          Download

        • memory/3032-44-0x0000000007210000-0x00000000072A6000-memory.dmp

          Filesize

          600KB

          Download

        • memory/3032-45-0x0000000007190000-0x00000000071A1000-memory.dmp

          Filesize

          68KB

          Download

        • memory/3032-46-0x00000000071C0000-0x00000000071CE000-memory.dmp

          Filesize

          56KB

          Download

        • memory/3032-47-0x00000000071D0000-0x00000000071E5000-memory.dmp

          Filesize

          84KB

          Download

        • memory/3032-24-0x0000000005C30000-0x0000000005C4E000-memory.dmp

          Filesize

          120KB

          Download

        • memory/3032-49-0x00000000072C0000-0x00000000072C8000-memory.dmp

          Filesize

          32KB

          Download

        • memory/3032-52-0x0000000074B20000-0x00000000752D1000-memory.dmp

          Filesize

          7.7MB

          Download

        • memory/3032-14-0x0000000005690000-0x00000000056F6000-memory.dmp

          Filesize

          408KB

          Download

        • memory/3032-8-0x00000000047C0000-0x00000000047F6000-memory.dmp

          Filesize

          216KB

          Download

        • memory/3032-9-0x0000000074B20000-0x00000000752D1000-memory.dmp

          Filesize

          7.7MB

          Download

        • memory/3032-12-0x0000000004DA0000-0x0000000004DC2000-memory.dmp

          Filesize

          136KB

          Download

        • memory/3032-13-0x0000000074B20000-0x00000000752D1000-memory.dmp

          Filesize

          7.7MB

          Download

        • memory/3032-11-0x0000000074B20000-0x00000000752D1000-memory.dmp

          Filesize

          7.7MB

          Download

        • memory/3032-10-0x0000000004E30000-0x000000000545A000-memory.dmp

          Filesize

          6.2MB

          Download

        • memory/3404-65-0x00007FFDF3333000-0x00007FFDF3335000-memory.dmp

          Filesize

          8KB

          Download

        • memory/3404-63-0x0000000000E70000-0x0000000000EF4000-memory.dmp

          Filesize

          528KB

          Download

        • memory/4472-105-0x000001382EA60000-0x000001382EB60000-memory.dmp

          Filesize

          1024KB

          Download

        • memory/4472-180-0x0000013862600000-0x0000013862700000-memory.dmp

          Filesize

          1024KB

          Download

        • memory/4472-223-0x0000013862840000-0x0000013862940000-memory.dmp

          Filesize

          1024KB

          Download

        • memory/4472-222-0x0000013862820000-0x0000013862840000-memory.dmp

          Filesize

          128KB

          Download

        • memory/4472-224-0x0000013861F70000-0x0000013861F90000-memory.dmp

          Filesize

          128KB

          Download

        • memory/4472-310-0x0000013866470000-0x0000013866570000-memory.dmp

          Filesize

          1024KB

          Download