Analysis

  • max time kernel
    79s
  • max time network
    130s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/09/2023, 01:53

General

  • Target

    60c24a4c6b54b1f4baeaee585e5e2486bbd3ab4733de36bb28da1fdb20596e21.exe

  • Size

    138KB

  • MD5

    7c055e203155b749a047987736400bfc

  • SHA1

    17f48b45920e1f3e6581e60b0ed346b5770e8363

  • SHA256

    60c24a4c6b54b1f4baeaee585e5e2486bbd3ab4733de36bb28da1fdb20596e21

  • SHA512

    8bccbac3f0e761ef19c7a97e7474ac9dc68ac58d4bdfbe095a4778400d2655b2a98d70c301c47f7cb072e77b3e3fde07a0c9a39c151908be5f7c47e1d5f24cb7

  • SSDEEP

    3072:UPgv1uTga8za7/aApO6fCR6kMgNjTX8jI8VD/dJJO04aN5uvvmRE7xIxT62Br09Q:oKZTMPVDdzR1N5sAxBN9dRd

Malware Config

Signatures

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (10758) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Enumerates connected drives 3 TTPs 2 IoCs

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

  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Interacts with shadow copies 2 TTPs 2 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs
  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\60c24a4c6b54b1f4baeaee585e5e2486bbd3ab4733de36bb28da1fdb20596e21.exe
    "C:\Users\Admin\AppData\Local\Temp\60c24a4c6b54b1f4baeaee585e5e2486bbd3ab4733de36bb28da1fdb20596e21.exe"
    1⤵
    • Checks computer location settings
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4176
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4852
      • C:\Windows\system32\vssadmin.exe
        vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:4128
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
      2⤵
        PID:2320
        • C:\Windows\system32\vssadmin.exe
          vssadmin.exe delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:704
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1340
    • C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe
      "C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe" /service
      1⤵
        PID:2592
      • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
        "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
        1⤵
        • Modifies registry class
        • Suspicious use of SetWindowsHookEx
        PID:2804

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Program Files (x86)\FILE ENCRYPTED.txt

        Filesize

        334B

        MD5

        e4f855abc55b2bf304a66216e13c5ad8

        SHA1

        d72d90394f74a14a6cb27814a45575a322462fce

        SHA256

        e75a145c45cb21c0fa7df0b323b80a49e9e4cf4fe3901461fe521aa52e5ea87c

        SHA512

        85ff88a7a2a7a1d35c873e04084964b5ab74784144dfaca4c57b929ceddb8c6ecda5996877d95658544788b76d0dd98c218361c8884801672d93f81f6db087f8

      • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\StartUnifiedTileModelCache.dat

        Filesize

        14KB

        MD5

        ab7ad3ba9ce406f024d67bbf719ea270

        SHA1

        ad3b8ff15db4d06439fba2fae4f14759aa3442fd

        SHA256

        23e81fa178f76252bc762c13875c31d481332ff6c948fd19d05938015de55a1a

        SHA512

        023fd9a530564213490a17d618087d3cdead08bc7a000dcde248e61d20d02569837c3e85f0a08a19a083279e87d5ccd43c34151649e598ff94b0ac29fa0d510e

      • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\StartUnifiedTileModelCache.dat

        Filesize

        14KB

        MD5

        9092019a4cb93f3b4e00bf6431c5a347

        SHA1

        68a90e4e16c7c027cd0a46ac7b7172bcc9c19baa

        SHA256

        223ccdbe8607265d53bb0467e367b13071388488b33c630f926725e517564ace

        SHA512

        eb1d6361d680050ff9b29edae07a584a55f0350cbeb12cf4476be21bd4dc80784e2989a7ca86cebfe00b6db9bc17115d239edb4e26b24aef136020ccc3f5248f