Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-06-2024 09:08

General

  • Target

    dllmain.exe

  • Size

    229KB

  • MD5

    411156b1cc6ca8a2722edb9a9bf15991

  • SHA1

    93441490e31783317bb8b3c2e4a9d0916eb4674d

  • SHA256

    0697ab58f1b4c94620982f20ffc2e1069974a7f4c38c804e3a15a3d3f54a89d5

  • SHA512

    61609bbcf4b09a5feb0ba72b531687f73bb3ee1e12dd7bda6ab2a4b5caf33f39e91df7f200184b63039cd7eee2b6b95575a89f5f03850d4841861ca3f4e377b5

  • SSDEEP

    6144:tloZMNrIkd8g+EtXHkv/iD4vW2mmkrHMl9YW3X241b8e1mik4i:voZmL+EP8vW2mmkrHMl9YW3X2MXkB

Malware Config

Signatures

  • Detect Umbral payload 1 IoCs
  • Umbral

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

  • 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.

  • 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.

  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies data under HKEY_USERS 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 26 IoCs
  • Suspicious use of SendNotifyMessage 24 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dllmain.exe
    "C:\Users\Admin\AppData\Local\Temp\dllmain.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2072
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\dllmain.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:232
    • 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⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3272
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1304
    • 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:4348
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1712
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4476
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
        PID:3092
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
        2⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:4336
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic" path win32_VideoController get name
        2⤵
        • Detects videocard installed
        PID:2576
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe"
      1⤵
      • Enumerates system info in registry
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:1756
      • 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=110.0.5481.104 --initial-client-data=0xfc,0x100,0x104,0xd8,0x108,0x7ffee482ab58,0x7ffee482ab68,0x7ffee482ab78
        2⤵
          PID:1920
        • 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=1716 --field-trial-handle=1688,i,3664021712908138446,14965164705388144045,131072 /prefetch:2
          2⤵
            PID:2984
          • 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=1960 --field-trial-handle=1688,i,3664021712908138446,14965164705388144045,131072 /prefetch:8
            2⤵
              PID:3136
            • 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=service --mojo-platform-channel-handle=2264 --field-trial-handle=1688,i,3664021712908138446,14965164705388144045,131072 /prefetch:8
              2⤵
                PID:4716
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --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=3100 --field-trial-handle=1688,i,3664021712908138446,14965164705388144045,131072 /prefetch:1
                2⤵
                  PID:2324
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=3136 --field-trial-handle=1688,i,3664021712908138446,14965164705388144045,131072 /prefetch:1
                  2⤵
                    PID:3216
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --mojo-platform-channel-handle=4392 --field-trial-handle=1688,i,3664021712908138446,14965164705388144045,131072 /prefetch:1
                    2⤵
                      PID:508
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=4564 --field-trial-handle=1688,i,3664021712908138446,14965164705388144045,131072 /prefetch:8
                      2⤵
                        PID:2992
                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=4672 --field-trial-handle=1688,i,3664021712908138446,14965164705388144045,131072 /prefetch:8
                        2⤵
                          PID:4576
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.ProcessorMetrics --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=4724 --field-trial-handle=1688,i,3664021712908138446,14965164705388144045,131072 /prefetch:8
                          2⤵
                            PID:1228
                          • C:\Program Files\Google\Chrome\Application\chrome.exe
                            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=4952 --field-trial-handle=1688,i,3664021712908138446,14965164705388144045,131072 /prefetch:8
                            2⤵
                              PID:3220
                            • 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=4936 --field-trial-handle=1688,i,3664021712908138446,14965164705388144045,131072 /prefetch:8
                              2⤵
                                PID:4724
                              • C:\Program Files\Google\Chrome\Application\chrome.exe
                                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --disable-gpu-sandbox --use-gl=disabled --gpu-vendor-id=4318 --gpu-device-id=140 --gpu-sub-system-id=0 --gpu-revision=0 --gpu-driver-version=10.0.19041.546 --gpu-preferences=UAAAAAAAAADoAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAACQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1612 --field-trial-handle=1688,i,3664021712908138446,14965164705388144045,131072 /prefetch:2
                                2⤵
                                • Suspicious behavior: EnumeratesProcesses
                                PID:1468
                            • C:\Program Files\Google\Chrome\Application\110.0.5481.104\elevation_service.exe
                              "C:\Program Files\Google\Chrome\Application\110.0.5481.104\elevation_service.exe"
                              1⤵
                                PID:4300

                              Network

                              MITRE ATT&CK Enterprise v15

                              Replay Monitor

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                              Downloads

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\Network Persistent State

                                Filesize

                                1KB

                                MD5

                                2521eb3973c5f6b2aec4ff26290feb62

                                SHA1

                                af3e347128bd411a276b0859ca2879947623f7cb

                                SHA256

                                ba7eadadbd69c195b3c94b6c2e848325797cf0d45a05b7385b95f6f704420874

                                SHA512

                                b9321bac5fee2db2ea475b6b8ff1b0ec63d6400e2b663679f8b34f2b7d9efb3822810512dd62707da38133fb5a4e413e49db9680db76403019fb9266d032d179

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\TransportSecurity

                                Filesize

                                356B

                                MD5

                                ec01a7ef342b86928270827d986728d8

                                SHA1

                                d294e7220425740bf50c778aed4ab077489ead0c

                                SHA256

                                68f302fcd5a70f12f3b97e6df4003bac3a02495b4c37dfdaf25ff81cddafde61

                                SHA512

                                6a12d6a4cfe1cbdc7e9c948968f54ca27539c3a9c48b50377b35e3100449ebb1c4f3fe16cd76f6ecf91c96f4778ff29016e0a8d7fb4e8b61aca9fde7b3da8181

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\d89d668a-04b0-4743-82e3-22c7fa07affa.tmp

                                Filesize

                                2B

                                MD5

                                d751713988987e9331980363e24189ce

                                SHA1

                                97d170e1550eee4afc0af065b78cda302a97674c

                                SHA256

                                4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

                                SHA512

                                b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences

                                Filesize

                                6KB

                                MD5

                                a172def4063a59d11cc666c156f78040

                                SHA1

                                f2bd71d9ff27a1ae2833b0b464120bb07657eea2

                                SHA256

                                4f0f81fba92b2bcd811e5ad112c653c0a2eb5557a85b3ebbec5d80c0ecab1cf5

                                SHA512

                                3d60467913a0242fcf19e5f0f0115488e026e3d4dc18a157b25f3a15a8d5ebb5c690b356489abb956929207e03bb9e91a7767e4568aefdc99d15b13a41662b24

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Secure Preferences

                                Filesize

                                16KB

                                MD5

                                3d4f42f4976df90914e1e850574c0ad0

                                SHA1

                                68ed54508d01d304abcdd7a64c59d2cf1d195a0c

                                SHA256

                                5892e59a9cce000f77b116e07a572d2660b2e02f8e497be4f6cb99f2d58bab3d

                                SHA512

                                159b8b3e212a34d6cdb46fad746f6bc14c83d4503c9e6eca4d19ab40a0ea0f6cf9ac64724f5838eca2ad515d8a9990167dfe1048c7a70c1657576191b0853aa2

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State

                                Filesize

                                281KB

                                MD5

                                de6613f4a1090b9b1c2a0dbc6e9556c4

                                SHA1

                                e3455bf3a22ac52a79bcc0a5feab97655ec21941

                                SHA256

                                169c12c27027af231895fb9a3e31b2d503ec94f52539821cbeeb412b617da8cc

                                SHA512

                                2ac589480b2e3224feba13d1396e749e5ff96ed60901d36597b305b1b144cc54bc5fa9d196fc8dba00e01a74a9c095191f1db90188e3c8ee441a1885be8c70f5

                              • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

                                Filesize

                                2KB

                                MD5

                                d85ba6ff808d9e5444a4b369f5bc2730

                                SHA1

                                31aa9d96590fff6981b315e0b391b575e4c0804a

                                SHA256

                                84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

                                SHA512

                                8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

                              • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

                                Filesize

                                944B

                                MD5

                                6d3e9c29fe44e90aae6ed30ccf799ca8

                                SHA1

                                c7974ef72264bbdf13a2793ccf1aed11bc565dce

                                SHA256

                                2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

                                SHA512

                                60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

                              • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

                                Filesize

                                948B

                                MD5

                                966914e2e771de7a4a57a95b6ecfa8a9

                                SHA1

                                7a32282fd51dd032967ed4d9a40cc57e265aeff2

                                SHA256

                                98d3c70d7004fa807897317bd6cd3e977b9b6c72d4d2565aca0f9f8b1c315cba

                                SHA512

                                dc39c7124a9c7c8d4c7e8e16290c46360b8d9a8f4e43edaacbbeb09bdcf20159a53db54d2b322372001b6a3de52b2f88e9088b5fdbc7638816ae0d122bb015f5

                              • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

                                Filesize

                                1KB

                                MD5

                                276798eeb29a49dc6e199768bc9c2e71

                                SHA1

                                5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

                                SHA256

                                cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

                                SHA512

                                0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

                              • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

                                Filesize

                                1KB

                                MD5

                                88db0a141f2cd066a7c4df2b3c8f8010

                                SHA1

                                94fa00eb79992a0ded28012645a7caf8e04debe1

                                SHA256

                                0d8418bfcb5ad8ee710af1bfbed2e2a095e50d56f487372775e6cef420f1c85a

                                SHA512

                                0cc6090bf52227b8241e9f38849257de7e5c2ad2a9a9ead41f115b7492caa97c64bf2cd02640d48dc5d8593c4ae462497fe1aba87f8454a096cd174932a699bd

                              • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_o0cdtopt.kt4.ps1

                                Filesize

                                60B

                                MD5

                                d17fe0a3f47be24a6453e9ef58c94641

                                SHA1

                                6ab83620379fc69f80c0242105ddffd7d98d5d9d

                                SHA256

                                96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

                                SHA512

                                5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

                              • memory/232-15-0x00007FFEE3D80000-0x00007FFEE4841000-memory.dmp

                                Filesize

                                10.8MB

                              • memory/232-18-0x00007FFEE3D80000-0x00007FFEE4841000-memory.dmp

                                Filesize

                                10.8MB

                              • memory/232-12-0x000001F324F40000-0x000001F324F62000-memory.dmp

                                Filesize

                                136KB

                              • memory/232-13-0x00007FFEE3D80000-0x00007FFEE4841000-memory.dmp

                                Filesize

                                10.8MB

                              • memory/232-14-0x00007FFEE3D80000-0x00007FFEE4841000-memory.dmp

                                Filesize

                                10.8MB

                              • memory/2072-71-0x00000236DA7A0000-0x00000236DA7AA000-memory.dmp

                                Filesize

                                40KB

                              • memory/2072-32-0x00000236DA870000-0x00000236DA8C0000-memory.dmp

                                Filesize

                                320KB

                              • memory/2072-0-0x00000236C00B0000-0x00000236C00F0000-memory.dmp

                                Filesize

                                256KB

                              • memory/2072-72-0x00000236DA7D0000-0x00000236DA7E2000-memory.dmp

                                Filesize

                                72KB

                              • memory/2072-33-0x00000236DA770000-0x00000236DA78E000-memory.dmp

                                Filesize

                                120KB

                              • memory/2072-92-0x00007FFEE3D80000-0x00007FFEE4841000-memory.dmp

                                Filesize

                                10.8MB

                              • memory/2072-31-0x00000236DA7F0000-0x00000236DA866000-memory.dmp

                                Filesize

                                472KB

                              • memory/2072-2-0x00007FFEE3D80000-0x00007FFEE4841000-memory.dmp

                                Filesize

                                10.8MB

                              • memory/2072-1-0x00007FFEE3D83000-0x00007FFEE3D85000-memory.dmp

                                Filesize

                                8KB

                              • memory/4348-68-0x000001E87BB40000-0x000001E87BB88000-memory.dmp

                                Filesize

                                288KB