Analysis

  • max time kernel
    150s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-05-2024 19:13

General

  • Target

    Shelbag anylizer.exe

  • Size

    93KB

  • MD5

    1ead93be70fe9a5c810e495eb7a03fda

  • SHA1

    cc23e50346278e4e43cd555cef0f2717bb6b888a

  • SHA256

    bdcfadcd70c3f7257a4b76181146424698309059fa089a6d7a83a76ea063c601

  • SHA512

    76828126e5994e01e31a027fa86a5d87aa0f278e6799e54fdf4f9429a746406621e4db6e57aac3d8421fa046efe66e089e35ea44ea516f2a20fce827dba12fbb

  • SSDEEP

    768:NY3KkgyYtrF4M5Y2XaxKlwnvhDL95XpJCTXTfGBqXxrjEtCdnl2pi1Rz4Rk38sGt:NkZYZpXajhLff2TfRjEwzGi1dDUDRgS

Malware Config

Signatures

  • Detect Umbral payload 2 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.

  • Disables Task Manager via registry modification
  • Drops file in Drivers directory 1 IoCs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Drops startup file 4 IoCs
  • Executes dropped EXE 2 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 3 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.

  • Drops file in System32 directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Shelbag anylizer.exe
    "C:\Users\Admin\AppData\Local\Temp\Shelbag anylizer.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4944
    • C:\Users\Admin\AppData\Roaming\server.exe
      "C:\Users\Admin\AppData\Roaming\server.exe"
      2⤵
      • Checks computer location settings
      • Drops startup file
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:1732
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\server.exe" "server.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:4044
      • C:\Users\Admin\AppData\Local\Temp\tmp397A.tmp.exe
        "C:\Users\Admin\AppData\Local\Temp\tmp397A.tmp.exe"
        3⤵
        • Drops file in Drivers directory
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3828
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" csproduct get uuid
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2064
        • C:\Windows\SYSTEM32\attrib.exe
          "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\tmp397A.tmp.exe"
          4⤵
          • Views/modifies file attributes
          PID:3164
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\tmp397A.tmp.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious use of AdjustPrivilegeToken
          PID:4460
        • 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
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2848
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2392
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1568
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" os get Caption
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:4388
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" computersystem get totalphysicalmemory
          4⤵
            PID:1492
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic.exe" csproduct get uuid
            4⤵
              PID:2368
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
              4⤵
                PID:4068
              • C:\Windows\System32\Wbem\wmic.exe
                "wmic" path win32_VideoController get name
                4⤵
                • Detects videocard installed
                PID:4620
              • C:\Windows\SYSTEM32\cmd.exe
                "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\tmp397A.tmp.exe" && pause
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:1344
                • C:\Windows\system32\PING.EXE
                  ping localhost
                  5⤵
                  • Runs ping.exe
                  PID:1484
        • C:\Windows\system32\taskmgr.exe
          "C:\Windows\system32\taskmgr.exe" /4
          1⤵
            PID:3292
          • C:\Windows\system32\taskmgr.exe
            "C:\Windows\system32\taskmgr.exe" /4
            1⤵
              PID:3976

            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

              276798eeb29a49dc6e199768bc9c2e71

              SHA1

              5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

              SHA256

              cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

              SHA512

              0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

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

              Filesize

              1KB

              MD5

              42a3371c158c084274bcac1936ac12b9

              SHA1

              6546651385520affc9708114cb8341a84d2b1a37

              SHA256

              194e06cc86ef254e19e302090e956c65302b1c48c2bb2404c15d5f32537418e5

              SHA512

              e102c4117c9a0a1377295f773f8567ac5f7f8811950300d004c5525d25b15d49edfae64b09b88e041435a9abb37c3d7ded31aa1a6d4c525fe1cb9c5365ad6690

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

              Filesize

              944B

              MD5

              d28a889fd956d5cb3accfbaf1143eb6f

              SHA1

              157ba54b365341f8ff06707d996b3635da8446f7

              SHA256

              21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

              SHA512

              0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

            • 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\Temp\__PSScriptPolicyTest_mqqresh1.34u.ps1

              Filesize

              60B

              MD5

              d17fe0a3f47be24a6453e9ef58c94641

              SHA1

              6ab83620379fc69f80c0242105ddffd7d98d5d9d

              SHA256

              96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

              SHA512

              5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

            • C:\Users\Admin\AppData\Local\Temp\tmp397A.tmp.exe

              Filesize

              229KB

              MD5

              5fed770815d7cf7b02aaae74b88bc714

              SHA1

              04099bfd6e5c89ee51296afd86ec3bed6ddac845

              SHA256

              290a02feff29e0cdfa6a4e70d2c2e330806b4768ea4c3ff4e3eb4588522d15c1

              SHA512

              a515102a99ec842bb576851e57fca15ebc41dc92678f8f98d9810d5725a51ba035e9147ba5fb7297f79e06e7905669269b560f07999737ad8a61311d70968cb6

            • C:\Users\Admin\AppData\Roaming\app

              Filesize

              5B

              MD5

              8f11404a507cfb98455f89a534077f73

              SHA1

              0716c668f504450353527aff1a6457b8348cf435

              SHA256

              f7c301f3fcce1c2444b540090e5024f0cea1806ab8ae1d81901ecc3b63334cbb

              SHA512

              85403dd06da5851e8c4d727ca8d87cc0e7ff4974942ec22123366684ed0e51b543a29b6d2521e2e65784c69884fde8d711e5064f104b098293fcd18c44769492

            • C:\Users\Admin\AppData\Roaming\server.exe

              Filesize

              93KB

              MD5

              1ead93be70fe9a5c810e495eb7a03fda

              SHA1

              cc23e50346278e4e43cd555cef0f2717bb6b888a

              SHA256

              bdcfadcd70c3f7257a4b76181146424698309059fa089a6d7a83a76ea063c601

              SHA512

              76828126e5994e01e31a027fa86a5d87aa0f278e6799e54fdf4f9429a746406621e4db6e57aac3d8421fa046efe66e089e35ea44ea516f2a20fce827dba12fbb

            • memory/1732-29-0x0000000074EC0000-0x0000000075471000-memory.dmp

              Filesize

              5.7MB

            • memory/1732-13-0x0000000074EC0000-0x0000000075471000-memory.dmp

              Filesize

              5.7MB

            • memory/1732-26-0x0000000074EC0000-0x0000000075471000-memory.dmp

              Filesize

              5.7MB

            • memory/1732-27-0x0000000074EC0000-0x0000000075471000-memory.dmp

              Filesize

              5.7MB

            • memory/1732-28-0x0000000074EC0000-0x0000000075471000-memory.dmp

              Filesize

              5.7MB

            • memory/1732-25-0x0000000074EC0000-0x0000000075471000-memory.dmp

              Filesize

              5.7MB

            • memory/1732-24-0x0000000074EC0000-0x0000000075471000-memory.dmp

              Filesize

              5.7MB

            • memory/1732-15-0x0000000074EC0000-0x0000000075471000-memory.dmp

              Filesize

              5.7MB

            • memory/1732-23-0x0000000074EC0000-0x0000000075471000-memory.dmp

              Filesize

              5.7MB

            • memory/3828-41-0x0000026A533E0000-0x0000026A53420000-memory.dmp

              Filesize

              256KB

            • memory/3828-69-0x0000026A6DB00000-0x0000026A6DB50000-memory.dmp

              Filesize

              320KB

            • memory/3828-68-0x0000026A6DB80000-0x0000026A6DBF6000-memory.dmp

              Filesize

              472KB

            • memory/3828-70-0x0000026A6D980000-0x0000026A6D99E000-memory.dmp

              Filesize

              120KB

            • memory/3828-107-0x0000026A6DB50000-0x0000026A6DB62000-memory.dmp

              Filesize

              72KB

            • memory/3828-106-0x0000026A6D9C0000-0x0000026A6D9CA000-memory.dmp

              Filesize

              40KB

            • memory/3828-125-0x0000026A6DC00000-0x0000026A6DDA9000-memory.dmp

              Filesize

              1.7MB

            • memory/4460-51-0x00000259B6EE0000-0x00000259B6F02000-memory.dmp

              Filesize

              136KB

            • memory/4944-0-0x0000000074EC2000-0x0000000074EC3000-memory.dmp

              Filesize

              4KB

            • memory/4944-14-0x0000000074EC0000-0x0000000075471000-memory.dmp

              Filesize

              5.7MB

            • memory/4944-2-0x0000000074EC0000-0x0000000075471000-memory.dmp

              Filesize

              5.7MB

            • memory/4944-1-0x0000000074EC0000-0x0000000075471000-memory.dmp

              Filesize

              5.7MB