Analysis

  • max time kernel
    149s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20240611-en
  • resource tags

    arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
  • submitted
    13-06-2024 21:58

General

  • Target

    Shellbag anylizer.exe

  • Size

    69KB

  • MD5

    a498059077fb136b7d57ef6f00dcae46

  • SHA1

    77421f91ed2c1586419128bd4687241050d712cc

  • SHA256

    8f2d3eeab5e5d807acff4be9b7d6b41340f0c8a891baa094543d10e65ccec7f2

  • SHA512

    3bec766aa97ed8b89c8be1c4da89befc5f22217637f72d158753996b2ed74439cf485e7692f4f1fa522d31ceb608c86b9035e9c594fcb147a91edf4547ac14c3

  • SSDEEP

    1536:bS3U8pWjIK2vvt8yAnkEZ6sPvWybW46zaQInA6dylkYcdOisYt2jNsXr:bWfWjXENk6wpbW4B9SSOisYsxer

Malware Config

Extracted

Family

xworm

Attributes
  • Install_directory

    %Temp%

  • install_file

    svchost.exe

  • pastebin_url

    https://pastebin.com/raw/qEVZXv39

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1228033288061583443/fMN2NuuQRV7pkiIZ0PwY980zozE_UYckmNOKmsrzvNf0xKeDmgGvDkNwC07bWCnl3OgB

Signatures

  • Detect Umbral payload 2 IoCs
  • Detect Xworm Payload 1 IoCs
  • Umbral

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

  • Xworm

    Xworm is a remote access trojan written in C#.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Drops file in Drivers directory 1 IoCs
  • Drops startup file 2 IoCs
  • 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 5 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 30 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 32 IoCs
  • Suspicious use of SendNotifyMessage 32 IoCs
  • Suspicious use of WriteProcessMemory 54 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe
    "C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe"
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2648
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2712
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Shellbag anylizer.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1828
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\svchost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2600
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1296
    • C:\Users\Admin\AppData\Local\Temp\mnthmv.exe
      "C:\Users\Admin\AppData\Local\Temp\mnthmv.exe"
      2⤵
      • Drops file in Drivers directory
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1908
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2396
      • C:\Windows\system32\attrib.exe
        "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\mnthmv.exe"
        3⤵
        • Views/modifies file attributes
        PID:2800
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\mnthmv.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2088
      • 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:1296
      • 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:2776
      • 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:2072
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" os get Caption
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2184
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" computersystem get totalphysicalmemory
        3⤵
          PID:2252
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" csproduct get uuid
          3⤵
            PID:2400
          • 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:108
          • C:\Windows\System32\Wbem\wmic.exe
            "wmic" path win32_VideoController get name
            3⤵
            • Detects videocard installed
            PID:2360
          • C:\Windows\system32\cmd.exe
            "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\mnthmv.exe" && pause
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:832
            • C:\Windows\system32\PING.EXE
              ping localhost
              4⤵
              • Runs ping.exe
              PID:1856
      • C:\Windows\system32\taskmgr.exe
        "C:\Windows\system32\taskmgr.exe" /4
        1⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:1556

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        229KB

        MD5

        c1396bccadcf38da92065ac10a8228c0

        SHA1

        fa1268895c988b3739e951d178921f16045c8d32

        SHA256

        dafcf88f0bbeddac51648092074624a384fc72e1e38140cde574c90f1d02161a

        SHA512

        885c98488af85742b2450d740f1b585f2b98ed6e0725576b4643ab8cc8b7bce670a5e497de6e813afc4592e451c4146c2d911bcdc0cff31ea2048e42f2eda082

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

        Filesize

        7KB

        MD5

        a66a573049a7b04d74d653862e3243db

        SHA1

        e2025a07bb9052d9fd3345a5955cd247358654dd

        SHA256

        30a2cbad9908ca0d05e4ab31c6eb9947314d4f6c824d6eed9e96cf9fbae983b0

        SHA512

        96b57b5cb8e549747d7f8d4bf5af948138557ada26cf869f6deb9fb9c2225378ff17a6534d4f4174c5cd6b147550a0c07c6a45f33f7dcb930cdc0113f111af8e

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

        Filesize

        7KB

        MD5

        d7f7d5067468012d0c23803a69861a75

        SHA1

        43141c076fda7e3dcbe10d8b290228365925e20d

        SHA256

        0507e6e535a51ed83ae133fae084e7e8bb91926bd88787bb03fc0c383aa1f9e2

        SHA512

        a8b48d5e92c5b9d94aeb38258f2199981866b8b4dde30479418fa838053c98abb5c546a71e7fda72f23d179e64d52aae0348e87860316447394109749256d682

      • memory/1556-85-0x0000000140000000-0x00000001405E8000-memory.dmp

        Filesize

        5.9MB

      • memory/1556-84-0x0000000140000000-0x00000001405E8000-memory.dmp

        Filesize

        5.9MB

      • memory/1828-14-0x000000001B670000-0x000000001B952000-memory.dmp

        Filesize

        2.9MB

      • memory/1828-15-0x0000000001E80000-0x0000000001E88000-memory.dmp

        Filesize

        32KB

      • memory/1908-39-0x0000000000DD0000-0x0000000000E10000-memory.dmp

        Filesize

        256KB

      • memory/2088-45-0x00000000022C0000-0x00000000022C8000-memory.dmp

        Filesize

        32KB

      • memory/2648-30-0x000007FEF5CB3000-0x000007FEF5CB4000-memory.dmp

        Filesize

        4KB

      • memory/2648-32-0x00000000006C0000-0x00000000006CC000-memory.dmp

        Filesize

        48KB

      • memory/2648-31-0x000007FEF5CB0000-0x000007FEF669C000-memory.dmp

        Filesize

        9.9MB

      • memory/2648-0-0x000007FEF5CB3000-0x000007FEF5CB4000-memory.dmp

        Filesize

        4KB

      • memory/2648-2-0x000007FEF5CB0000-0x000007FEF669C000-memory.dmp

        Filesize

        9.9MB

      • memory/2648-1-0x00000000002F0000-0x0000000000308000-memory.dmp

        Filesize

        96KB

      • memory/2712-8-0x0000000001F70000-0x0000000001F78000-memory.dmp

        Filesize

        32KB

      • memory/2712-7-0x000000001B700000-0x000000001B9E2000-memory.dmp

        Filesize

        2.9MB