Analysis

  • max time kernel
    64s
  • max time network
    64s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-02-2024 00:41

General

  • Target

    NostalgiaPaste.exe

  • Size

    614KB

  • MD5

    863ccaa8f5615fd603e3df9e08d433c6

  • SHA1

    58e5ac27b4c8ce04b705fbd4fc267c7c96ae8438

  • SHA256

    b502a581b8b5f291508791631fbd40853edc952572eaa214086f6a91694a284a

  • SHA512

    715dccca665ffc88da761fc2ae0a9a01a477c3546b86fc0922ca033b4826f44b42c2c718b1adec2c26e9736e3e81c144ef5f5161706daa3acbabe8b0f952a906

  • SSDEEP

    12288:3l/5a8Yv+Gk+IRvmf8lDATKwRP7NaaWSxpumTFzoLIOnrDjfBlfrkfVNaw9mmrz6:3P9rGbIRuf8lkRP7NaLGNoLbjfBl4NN7

Score
10/10

Malware Config

Signatures

  • Detect Umbral payload 3 IoCs
  • Umbral

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 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.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 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.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\NostalgiaPaste.exe
    "C:\Users\Admin\AppData\Local\Temp\NostalgiaPaste.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:848
    • C:\Users\Admin\AppData\Local\Temp\nostalgia_authentication.exe
      "C:\Users\Admin\AppData\Local\Temp\nostalgia_authentication.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3472
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\nostalgia_authentication.exe'
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4236
      • 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⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1272
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3096
      • 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:3400
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" os get Caption
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1456
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" computersystem get totalphysicalmemory
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:5084
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        3⤵
          PID:2916
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4336
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic" path win32_VideoController get name
          3⤵
          • Detects videocard installed
          PID:2032

    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

      6317adf4fbc43ea2fd68861fafd57155

      SHA1

      6b87c718893c83c6eed2767e8d9cbc6443e31913

      SHA256

      c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af

      SHA512

      17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0

    • 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

      2af06a6b36db9473e4a7d9c7ab72b70b

      SHA1

      8ef34b9b961e51bdd1b8d7d9db2ec1b0a4764645

      SHA256

      18a2aa7e245c6732f95fb7749b2b4d29007f2c56a9c5bfbc5e3c127bdfe5f158

      SHA512

      3495567a5d5af94ae27be51313d9e2630c52017d808042fe0d56baa34fa1d246eb15c253d14c77c77a1d8f2f1c81680e623044ae95415b095696e7fa141ac7cf

    • 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\__PSScriptPolicyTest_cx3fjuu3.j4a.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

      Filesize

      229KB

      MD5

      9807cd8bd9f25a62782f5ef42ef82432

      SHA1

      942ca4582b457f0f3768e02a3422e2646ec774e7

      SHA256

      9072ab80200c13dd896e67257dd9fa4f8795bbca69513d1529fa782c54ffb13d

      SHA512

      dd51a1d295778593c40ef27d8319ef04a0b02ee0b7a68c599aea83846d17d1db1f445ec63890639d3e9da649aac7613aa296f3e50be0a41c28683136e59ba1c3

    • memory/848-7-0x0000000005CA0000-0x0000000005CAA000-memory.dmp

      Filesize

      40KB

    • memory/848-86-0x0000000005630000-0x0000000005640000-memory.dmp

      Filesize

      64KB

    • memory/848-61-0x0000000074AA0000-0x0000000075250000-memory.dmp

      Filesize

      7.7MB

    • memory/848-132-0x0000000074AA0000-0x0000000075250000-memory.dmp

      Filesize

      7.7MB

    • memory/848-20-0x0000000005630000-0x0000000005640000-memory.dmp

      Filesize

      64KB

    • memory/848-6-0x0000000005950000-0x000000000596C000-memory.dmp

      Filesize

      112KB

    • memory/848-102-0x0000000005630000-0x0000000005640000-memory.dmp

      Filesize

      64KB

    • memory/848-5-0x00000000059D0000-0x0000000005A62000-memory.dmp

      Filesize

      584KB

    • memory/848-4-0x0000000005EA0000-0x0000000006444000-memory.dmp

      Filesize

      5.6MB

    • memory/848-0-0x0000000074AA0000-0x0000000075250000-memory.dmp

      Filesize

      7.7MB

    • memory/848-1-0x0000000000B90000-0x0000000000CE0000-memory.dmp

      Filesize

      1.3MB

    • memory/848-8-0x0000000007630000-0x000000000766E000-memory.dmp

      Filesize

      248KB

    • memory/848-3-0x0000000005630000-0x0000000005640000-memory.dmp

      Filesize

      64KB

    • memory/848-2-0x0000000002F60000-0x0000000002F61000-memory.dmp

      Filesize

      4KB

    • memory/1272-41-0x00007FFC16F50000-0x00007FFC17A11000-memory.dmp

      Filesize

      10.8MB

    • memory/1272-42-0x000002A7176F0000-0x000002A717700000-memory.dmp

      Filesize

      64KB

    • memory/1272-43-0x000002A7176F0000-0x000002A717700000-memory.dmp

      Filesize

      64KB

    • memory/1272-54-0x000002A7176F0000-0x000002A717700000-memory.dmp

      Filesize

      64KB

    • memory/1272-56-0x00007FFC16F50000-0x00007FFC17A11000-memory.dmp

      Filesize

      10.8MB

    • memory/3096-88-0x00007FFC16F50000-0x00007FFC17A11000-memory.dmp

      Filesize

      10.8MB

    • memory/3096-63-0x000001DF5EA50000-0x000001DF5EA60000-memory.dmp

      Filesize

      64KB

    • memory/3096-62-0x000001DF5EA50000-0x000001DF5EA60000-memory.dmp

      Filesize

      64KB

    • memory/3096-60-0x00007FFC16F50000-0x00007FFC17A11000-memory.dmp

      Filesize

      10.8MB

    • memory/3400-100-0x00000261734C0000-0x00000261734D0000-memory.dmp

      Filesize

      64KB

    • memory/3400-101-0x00000261734C0000-0x00000261734D0000-memory.dmp

      Filesize

      64KB

    • memory/3400-104-0x00007FFC16F50000-0x00007FFC17A11000-memory.dmp

      Filesize

      10.8MB

    • memory/3400-98-0x00007FFC16F50000-0x00007FFC17A11000-memory.dmp

      Filesize

      10.8MB

    • memory/3472-21-0x00000157B3FD0000-0x00000157B4010000-memory.dmp

      Filesize

      256KB

    • memory/3472-130-0x00007FFC16F50000-0x00007FFC17A11000-memory.dmp

      Filesize

      10.8MB

    • memory/3472-59-0x00000157CE580000-0x00000157CE59E000-memory.dmp

      Filesize

      120KB

    • memory/3472-57-0x00000157CE500000-0x00000157CE576000-memory.dmp

      Filesize

      472KB

    • memory/3472-22-0x00007FFC16F50000-0x00007FFC17A11000-memory.dmp

      Filesize

      10.8MB

    • memory/3472-107-0x00000157B5D80000-0x00000157B5D8A000-memory.dmp

      Filesize

      40KB

    • memory/3472-108-0x00000157B5DB0000-0x00000157B5DC2000-memory.dmp

      Filesize

      72KB

    • memory/3472-23-0x00000157CE5D0000-0x00000157CE5E0000-memory.dmp

      Filesize

      64KB

    • memory/3472-105-0x00007FFC16F50000-0x00007FFC17A11000-memory.dmp

      Filesize

      10.8MB

    • memory/3472-58-0x00000157B5DD0000-0x00000157B5E20000-memory.dmp

      Filesize

      320KB

    • memory/4236-35-0x00000221034F0000-0x0000022103500000-memory.dmp

      Filesize

      64KB

    • memory/4236-24-0x0000022104F70000-0x0000022104F92000-memory.dmp

      Filesize

      136KB

    • memory/4236-34-0x00007FFC16F50000-0x00007FFC17A11000-memory.dmp

      Filesize

      10.8MB

    • memory/4236-36-0x00000221034F0000-0x0000022103500000-memory.dmp

      Filesize

      64KB

    • memory/4236-39-0x00007FFC16F50000-0x00007FFC17A11000-memory.dmp

      Filesize

      10.8MB

    • memory/4336-112-0x000001C579EA0000-0x000001C579EB0000-memory.dmp

      Filesize

      64KB

    • memory/4336-111-0x00007FFC16F50000-0x00007FFC17A11000-memory.dmp

      Filesize

      10.8MB

    • memory/4336-113-0x000001C579EA0000-0x000001C579EB0000-memory.dmp

      Filesize

      64KB

    • memory/4336-125-0x00007FFC16F50000-0x00007FFC17A11000-memory.dmp

      Filesize

      10.8MB