Analysis

  • max time kernel
    10s
  • max time network
    13s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240709-en
  • resource tags

    arch:x64arch:x86image:win11-20240709-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    27-07-2024 05:14

General

  • Target

    SolaraB.exe

  • Size

    229KB

  • MD5

    48baa0394f0e53ec2e19d99a3b98a400

  • SHA1

    723638a8779f3ed8d195fdc1af92bd2036ec1ca6

  • SHA256

    186b386185fc93d31a827f9a711ceb0134e85cd91acf0d8b622b891bda751e79

  • SHA512

    eeab39f6d51059f79d0372cd0b1c2197ac08f53a94068b070a63c28344a92e8d4f521e6b0f0a172e950fcbd17c22a707a7d0cbad3209669b868822651b023c53

  • SSDEEP

    6144:lloZM+rIkd8g+EtXHkv/iD4G//Hdtxd38e1m+Ji:noZtL+EP8ovnxZe

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.

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

    Adversaries may check for Internet connectivity on compromised systems.

  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SolaraB.exe
    "C:\Users\Admin\AppData\Local\Temp\SolaraB.exe"
    1⤵
    • Drops file in Drivers directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:952
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:656
    • C:\Windows\SYSTEM32\attrib.exe
      "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\SolaraB.exe"
      2⤵
      • Views/modifies file attributes
      PID:1072
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\SolaraB.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:32
    • 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:4920
    • 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:3536
    • 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:1028
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3672
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
        PID:1644
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        2⤵
          PID:1648
        • 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:5060
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic" path win32_VideoController get name
          2⤵
          • Detects videocard installed
          PID:4052
        • C:\Windows\SYSTEM32\cmd.exe
          "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\SolaraB.exe" && pause
          2⤵
          • System Network Configuration Discovery: Internet Connection Discovery
          • Suspicious use of WriteProcessMemory
          PID:3552
          • C:\Windows\system32\PING.EXE
            ping localhost
            3⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Runs ping.exe
            PID:4352
      • C:\Windows\System32\rundll32.exe
        C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
        1⤵
          PID:104

        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

          627073ee3ca9676911bee35548eff2b8

          SHA1

          4c4b68c65e2cab9864b51167d710aa29ebdcff2e

          SHA256

          85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

          SHA512

          3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

          Filesize

          944B

          MD5

          1a9fa92a4f2e2ec9e244d43a6a4f8fb9

          SHA1

          9910190edfaccece1dfcc1d92e357772f5dae8f7

          SHA256

          0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

          SHA512

          5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

          Filesize

          948B

          MD5

          a0e27123ec2730bd5d89828fd6a41cc2

          SHA1

          d1099e93025598a470d6cc9c0549595e8f8e9a7f

          SHA256

          fda70f35a9cbde9e93461cd72d0c668f964d8b07e5c43322e47ed602ceb177a9

          SHA512

          b73fba4357362fa2057fe5216490da71958e1edb6fd08fe7cd99d214a8a1a5381ff304584c7969cedfb790170ecd65cbe96e006c5d2e41ceff587138ba244d31

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

          Filesize

          1KB

          MD5

          7332074ae2b01262736b6fbd9e100dac

          SHA1

          22f992165065107cc9417fa4117240d84414a13c

          SHA256

          baea84fda6c1f13090b8cbd91c920848946f10ce155ef31a1df4cd453ee7e4aa

          SHA512

          4ae6f0e012c31ac1fc2ff4a8877ce2b4667c45b6e651de798318a39a2b6fd39a6f72dffa8b0b89b7a045a27d724d195656faa25a9fec79b22f37ddebb5d22da2

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

          Filesize

          1KB

          MD5

          623edc19594c7e9cb1958ff7004b2194

          SHA1

          219f235fcd160655042cddea3f28f4c5b3b4570d

          SHA256

          ce721349257d0e1e1c9ec58980598346336fdefb36762f5d074322e59f5ce949

          SHA512

          556ecc312e7fae6aa394db0b5b6e75032e566f9b75c7a267a9b2e4cefbd1271d0a87dd325fcda9d1f6648ff4eee9cd5e96fd0901c09d229214ad9cbf55590ff9

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_q4xph4hw.gaq.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • memory/32-3-0x0000025775610000-0x0000025775632000-memory.dmp

          Filesize

          136KB

        • memory/32-13-0x00007FFAB8EF0000-0x00007FFAB99B2000-memory.dmp

          Filesize

          10.8MB

        • memory/32-14-0x00007FFAB8EF0000-0x00007FFAB99B2000-memory.dmp

          Filesize

          10.8MB

        • memory/32-17-0x00007FFAB8EF0000-0x00007FFAB99B2000-memory.dmp

          Filesize

          10.8MB

        • memory/32-9-0x00007FFAB8EF0000-0x00007FFAB99B2000-memory.dmp

          Filesize

          10.8MB

        • memory/952-32-0x000001D7588E0000-0x000001D758930000-memory.dmp

          Filesize

          320KB

        • memory/952-31-0x000001D7711C0000-0x000001D771236000-memory.dmp

          Filesize

          472KB

        • memory/952-33-0x000001D756FE0000-0x000001D756FFE000-memory.dmp

          Filesize

          120KB

        • memory/952-1-0x00007FFAB8EF3000-0x00007FFAB8EF5000-memory.dmp

          Filesize

          8KB

        • memory/952-0-0x000001D756A90000-0x000001D756AD0000-memory.dmp

          Filesize

          256KB

        • memory/952-67-0x000001D758930000-0x000001D75893A000-memory.dmp

          Filesize

          40KB

        • memory/952-68-0x000001D758960000-0x000001D758972000-memory.dmp

          Filesize

          72KB

        • memory/952-2-0x00007FFAB8EF0000-0x00007FFAB99B2000-memory.dmp

          Filesize

          10.8MB

        • memory/952-85-0x00007FFAB8EF0000-0x00007FFAB99B2000-memory.dmp

          Filesize

          10.8MB