Analysis

  • max time kernel
    76s
  • max time network
    133s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/08/2024, 14:13

General

  • Target
    Installer-master-BlackMythWukong.msi
  • Size 43.8MB
  • Sample240831-rjmemsxerr
  • SHA256 395c44cce9624a5750c97c313b5ede45ea36dd623bc71f7d1bf2e4964492dcd4
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Rhadamanthys

    Rhadamanthys is an info stealer written in C++ first seen in August 2022.

  • Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs
  • Modifies file permissions 1 TTPs 2 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Windows directory 9 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks SCSI registry key(s) 3 TTPs 5 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 49 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
      PID:2952
      • C:\Windows\SysWOW64\openwith.exe
        "C:\Windows\system32\openwith.exe"
        2⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:3988
    • C:\Windows\system32\msiexec.exe
      msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\Installer-master-BlackMythWukong.msi
      1⤵
      • Enumerates connected drives
      • Event Triggered Execution: Installer Packages
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:1592
    • C:\Windows\system32\msiexec.exe
      C:\Windows\system32\msiexec.exe /V
      1⤵
      • Enumerates connected drives
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2728
      • C:\Windows\system32\srtasks.exe
        C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
        2⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:4744
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding FAC6DE93DEF274B4E41760CB3010EEB7
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1816
        • C:\Windows\SysWOW64\ICACLS.EXE
          "C:\Windows\system32\ICACLS.EXE" "C:\Users\Admin\AppData\Local\Temp\MW-97802ab5-ecf4-4ef8-a803-bca1e5aa5cfe\." /SETINTEGRITYLEVEL (CI)(OI)HIGH
          3⤵
          • Modifies file permissions
          • System Location Discovery: System Language Discovery
          PID:3460
        • C:\Windows\SysWOW64\EXPAND.EXE
          "C:\Windows\system32\EXPAND.EXE" -R files.cab -F:* files
          3⤵
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          PID:1152
        • C:\Users\Admin\AppData\Local\Temp\MW-97802ab5-ecf4-4ef8-a803-bca1e5aa5cfe\files\visapro.exe
          "C:\Users\Admin\AppData\Local\Temp\MW-97802ab5-ecf4-4ef8-a803-bca1e5aa5cfe\files\visapro.exe"
          3⤵
          • Suspicious use of NtCreateUserProcessOtherParentProcess
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4256
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 4256 -s 720
            4⤵
            • Program crash
            PID:2676
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c rd /s /q "C:\Users\Admin\AppData\Local\Temp\MW-97802ab5-ecf4-4ef8-a803-bca1e5aa5cfe\files"
          3⤵
          • System Location Discovery: System Language Discovery
          PID:3516
        • C:\Windows\SysWOW64\ICACLS.EXE
          "C:\Windows\system32\ICACLS.EXE" "C:\Users\Admin\AppData\Local\Temp\MW-97802ab5-ecf4-4ef8-a803-bca1e5aa5cfe\." /SETINTEGRITYLEVEL (CI)(OI)LOW
          3⤵
          • Modifies file permissions
          • System Location Discovery: System Language Discovery
          PID:4752
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      • Suspicious use of AdjustPrivilegeToken
      PID:832
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4256 -ip 4256
      1⤵
        PID:532

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            files.cab

            • Path C:\Users\Admin\AppData\Local\Temp\MW-97802ab5-ecf4-4ef8-a803-bca1e5aa5cfe\files.cab
            • Size 43.4MB
            • SHA256 0bd8fb2d6b28c93dcf4c3badffae9041287221a2db276ff872a78221ac1e0f31
            • MD5 SHA1 SHA512 SSDEEP

            visapro.exe

            • Path C:\Users\Admin\AppData\Local\Temp\MW-97802ab5-ecf4-4ef8-a803-bca1e5aa5cfe\files\visapro.exe
            • Size 49.6MB
            • SHA256 d3f7809ae8ccc194787198cc370952ab22a9b74bcae1e249f840c18798205bc1
            • MD5 SHA1 SHA512 SSDEEP

            msiwrapper.ini

            • Path C:\Users\Admin\AppData\Local\Temp\MW-97802ab5-ecf4-4ef8-a803-bca1e5aa5cfe\msiwrapper.ini
            • Size 1004B
            • SHA256 524dcd3a285f7f4eb622e68a84bf8bcb23c4fea44fc36b99be91c160187f11ac
            • MD5 SHA1 SHA512

            msiwrapper.ini

            • Path C:\Users\Admin\AppData\Local\Temp\MW-97802ab5-ecf4-4ef8-a803-bca1e5aa5cfe\msiwrapper.ini
            • Size 1KB
            • SHA256 fb80554755798836e14291652746a1c487fdf8a9c71e8a48eaf1026a7f264ea1
            • MD5 SHA1 SHA512

            MSIC5F.tmp

            • Path C:\Windows\Installer\MSIC5F.tmp
            • Size 208KB
            • SHA256 fd622cf73ea951a6de631063aba856487d77745dd1500adca61902b8dde56fe1
            • MD5 SHA1 SHA512 SSDEEP

            metadata-2

            • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
            • Size 23.7MB
            • SHA256 e6ca26acc06d650bad96a1ba8b13df0907b597630d902b811e69e4cf010cea35
            • MD5 SHA1 SHA512 SSDEEP

            {c76b2626-6e6e-4703-8162-7f3f2db5e662}_OnDiskSnapshotProp

            • Path \??\Volume{fa35ad82-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{c76b2626-6e6e-4703-8162-7f3f2db5e662}_OnDiskSnapshotProp
            • Size 6KB
            • SHA256 0e29dbeb82a8a5b3680081bd24316740da993db19ce12b1eb30bd431f13a7c19
            • MD5 SHA1 SHA512 SSDEEP

            memory/3988-75-0x0000000000640000-0x0000000000649000-memory.dmp

            memory/3988-77-0x0000000002260000-0x0000000002660000-memory.dmp

            memory/3988-80-0x0000000077070000-0x0000000077285000-memory.dmp

            memory/3988-78-0x00007FF839EF0000-0x00007FF83A0E5000-memory.dmp

            memory/4256-70-0x00000000035B0000-0x00000000039B0000-memory.dmp

            memory/4256-71-0x00000000035B0000-0x00000000039B0000-memory.dmp

            memory/4256-72-0x00007FF839EF0000-0x00007FF83A0E5000-memory.dmp

            memory/4256-74-0x0000000077070000-0x0000000077285000-memory.dmp