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Analysis

  • max time kernel
    30s
  • max time network
    31s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/09/2024, 02:16

General

  • Target

    Delta hack pc.exe

  • Size

    231KB

  • MD5

    3b915b9bbc5ddf429f85bf939febe424

  • SHA1

    2278baaf3764a27bc962de75601f4d49b2191592

  • SHA256

    435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92

  • SHA512

    d83341bf784bed732bf120299824ea066f66f505b6dd0fb0b84396af34877a1ba0c483c805835179be2463dd34503b31260035e78f47ca1396305f60f2be50ed

  • SSDEEP

    6144:xloZM+rIkd8g+EtXHkv/iD4LmfzMOsTPkPFQu//OPub8e1mt6i:DoZtL+EP8LwzMOsTPkPFQu//OKO/

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.

  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Delta hack pc.exe
    "C:\Users\Admin\AppData\Local\Temp\Delta hack pc.exe"
    1⤵
    • Drops file in Drivers directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4580
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3000
    • C:\Windows\SYSTEM32\attrib.exe
      "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Delta hack pc.exe"
      2⤵
      • Views/modifies file attributes
      PID:2884
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Delta hack pc.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1076
    • 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:220
    • 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:5040
    • 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:2608
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4940
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
        PID:316
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        2⤵
          PID:4964
        • 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:3664
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic" path win32_VideoController get name
          2⤵
          • Detects videocard installed
          PID:4416

      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

        944B

        MD5

        77d622bb1a5b250869a3238b9bc1402b

        SHA1

        d47f4003c2554b9dfc4c16f22460b331886b191b

        SHA256

        f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

        SHA512

        d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

        Filesize

        948B

        MD5

        17d8127be94d3c1b6fcc9a4ed585003e

        SHA1

        789874fcc7c778c723f3e89822d8cc8750c6c4c8

        SHA256

        ea357ad1f95863b3618d31e5b0f90495331f64de2b784d9e185b48668c937a7b

        SHA512

        bb18b6d07d82227f5cfbe3eb460df79ec892c560ad2964dcd4782aa26336ae15059843bf46a739bdd4a4daa58057f99102531a756a1cf434ce6449b3cd35a98e

      • 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

        2c8a0abbe947bc7ce717ba72432ff5ee

        SHA1

        b47d56a802f56b6b020ea9dea7726f6d03a41816

        SHA256

        526708b288d09045c390c12a0a4ea945a5166ba6673319cc6f9e6fcaa1c7c86a

        SHA512

        6390ccc8f4970a780768e8dde957c9b2e5e4bb76b0bc01e1d18f06beef6a293be59a9aed309bd04577af58024aa666f50d5ce62fe0af19473bb32c1623b0efd0

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3xgrchbn.mxr.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • memory/1076-13-0x00007FFBB62B0000-0x00007FFBB6D71000-memory.dmp

        Filesize

        10.8MB

      • memory/1076-14-0x000001709B850000-0x000001709B872000-memory.dmp

        Filesize

        136KB

      • memory/1076-15-0x00007FFBB62B0000-0x00007FFBB6D71000-memory.dmp

        Filesize

        10.8MB

      • memory/1076-18-0x00007FFBB62B0000-0x00007FFBB6D71000-memory.dmp

        Filesize

        10.8MB

      • memory/1076-12-0x00007FFBB62B0000-0x00007FFBB6D71000-memory.dmp

        Filesize

        10.8MB

      • memory/4580-34-0x000001C6FC6A0000-0x000001C6FC6F0000-memory.dmp

        Filesize

        320KB

      • memory/4580-33-0x000001C6FC750000-0x000001C6FC7C6000-memory.dmp

        Filesize

        472KB

      • memory/4580-35-0x000001C6FC710000-0x000001C6FC72E000-memory.dmp

        Filesize

        120KB

      • memory/4580-1-0x000001C6E1FC0000-0x000001C6E2000000-memory.dmp

        Filesize

        256KB

      • memory/4580-0-0x00007FFBB62B3000-0x00007FFBB62B5000-memory.dmp

        Filesize

        8KB

      • memory/4580-71-0x000001C6FC680000-0x000001C6FC68A000-memory.dmp

        Filesize

        40KB

      • memory/4580-72-0x000001C6FC7D0000-0x000001C6FC7E2000-memory.dmp

        Filesize

        72KB

      • memory/4580-2-0x00007FFBB62B0000-0x00007FFBB6D71000-memory.dmp

        Filesize

        10.8MB

      • memory/4580-87-0x00007FFBB62B3000-0x00007FFBB62B5000-memory.dmp

        Filesize

        8KB

      • memory/4580-88-0x00007FFBB62B0000-0x00007FFBB6D71000-memory.dmp

        Filesize

        10.8MB