Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • submitted
    10/05/2024, 22:03

General

  • Target
    MSI.msi
  • Size 1.5MB
  • Sample240510-1yb2wsfa93
  • SHA256 ead5ebf464c313176174ff0fdc3360a3477f6361d0947221d31287eeb04691b3
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • latrodectus

C2
  • https://workspacin.cloud/live/

  • https://illoskanawer.com/live/

Signatures

  • Brute Ratel C4

    A customized command and control framework for red teaming and adversary simulation.

  • Bruteratel family
  • Detect BruteRatel badger 2 IoCs
  • Latrodectus family
  • Latrodectus loader

    Latrodectus is a loader written in C++.

  • Detect larodectus Loader variant 2 3 IoCs
  • Blocklisted process makes network request 48 IoCs
  • Adds Run key to start application 2 TTPs 1 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 10 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 9 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 3 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 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs
  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of UnmapMainImage
    PID:3424
    • C:\Windows\system32\msiexec.exe
      msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\MSI.msi
      2⤵
      • Enumerates connected drives
      • Event Triggered Execution: Installer Packages
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:4316
    • C:\Windows\System32\rundll32.exe
      "C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Roaming\upfilles.dll, stow
      2⤵
      • Blocklisted process makes network request
      • Adds Run key to start application
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4916
  • 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:4456
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 6A64616CDF632EACC7FA327BE8AFA80C C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:1388
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:1208
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding BD5371EFA3EFC8A97BAD83D5CF0191B5
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:3296
      • C:\Windows\Installer\MSI68CF.tmp
        "C:\Windows\Installer\MSI68CF.tmp" C:/Windows/System32/rundll32.exe C:\Users\Admin\AppData\Roaming\upfilles.dll, stow
        2⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:4164
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:2832

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          MSI31FD.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI31FD.tmp
          • Size 436KB
          • SHA256 426e6cf199a8268e8a7763ec3a4dd7add982b28c51d89ebea90ca792cbae14dd
          • MD5 SHA1 SHA512 SSDEEP

          upfilles.dll

          • Path C:\Users\Admin\AppData\Roaming\upfilles.dll
          • Size 508KB
          • SHA256 f4cb6b684ea097f867d406a978b3422bbf2ecfea39236bf3ab99340996b825de
          • MD5 SHA1 SHA512 SSDEEP

          MSI68CF.tmp

          • Path C:\Windows\Installer\MSI68CF.tmp
          • Size 389KB
          • SHA256 1e0e63b446eecf6c9781c7d1cae1f46a3bb31654a70612f71f31538fb4f4729a
          • MD5 SHA1 SHA512 SSDEEP

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 23.7MB
          • SHA256 63062eda12d748a8b174e573606d1304254ea7a825d97822a6c830d171e6ffa1
          • MD5 SHA1 SHA512 SSDEEP

          {2913869e-1294-499d-93cb-950db74b8587}_OnDiskSnapshotProp

          • Path \??\Volume{b97ed4d9-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{2913869e-1294-499d-93cb-950db74b8587}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 e7637034aa66eb14c4a9a1ce6648d77bcb63a6d237428ec9e5c8343a37b2fbda
          • MD5 SHA1 SHA512 SSDEEP

          memory/3424-101-0x0000000002350000-0x0000000002362000-memory.dmp

          memory/3424-100-0x0000000002350000-0x0000000002362000-memory.dmp

          memory/4916-95-0x00007FF48D0C0000-0x00007FF48D0D2000-memory.dmp

          memory/4916-90-0x00007FF48D0C0000-0x00007FF48D0C1000-memory.dmp

          memory/4916-93-0x00007FF48D090000-0x00007FF48D091000-memory.dmp

          memory/4916-97-0x00007FF48D0A0000-0x00007FF48D0A1000-memory.dmp

          memory/4916-96-0x00007FF48D0B0000-0x00007FF48D0B1000-memory.dmp

          memory/4916-49-0x0000025E2A340000-0x0000025E2A38C000-memory.dmp

          memory/4916-94-0x00007FF48D0E0000-0x00007FF48D0E1000-memory.dmp

          memory/4916-92-0x00007FF48D0A0000-0x00007FF48D0A1000-memory.dmp

          memory/4916-91-0x00007FF48D0B0000-0x00007FF48D0B1000-memory.dmp

          memory/4916-64-0x0000025E2A340000-0x0000025E2A38C000-memory.dmp

          memory/4916-89-0x00007FF48D0D0000-0x00007FF48D0D1000-memory.dmp

          memory/4916-88-0x00007FF48D0E0000-0x00007FF48D0E1000-memory.dmp

          memory/4916-48-0x000000026E7A0000-0x000000026E7EA000-memory.dmp

          memory/4916-99-0x00007FF48D080000-0x00007FF48D081000-memory.dmp

          memory/4916-98-0x00007FF48D090000-0x00007FF48D091000-memory.dmp

          memory/4916-47-0x000000026E7A0000-0x000000026E7EA000-memory.dmp

          memory/4916-105-0x0000025E2A340000-0x0000025E2A38C000-memory.dmp