Resubmissions

22-08-2024 18:43

240822-xc563asamh 10

21-08-2024 17:16

240821-vtjnaathnq 10

30-06-2024 00:59

240630-bcjr6svbkk 10

20-06-2024 02:02

240620-cf43ysxbnk 10

20-06-2024 01:44

240620-b5v1xawemk 10

19-06-2024 01:10

240619-bjmseavfmp 10

18-06-2024 20:40

240618-zfwsxawdpa 10

18-06-2024 13:45

240618-q2vcjawdle 10

Analysis

  • max time kernel
    124s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-06-2024 01:44

General

  • Target

    Documents/Ransomware.TeslaCrypt/Ransomware.TeslaCrypt/3372c1edab46837f1e973164fa2d726c5c5e17bcb888828ccd7c4dfcc234a370.exe

  • Size

    284KB

  • MD5

    209a288c68207d57e0ce6e60ebf60729

  • SHA1

    e654d39cd13414b5151e8cf0d8f5b166dddd45cb

  • SHA256

    3372c1edab46837f1e973164fa2d726c5c5e17bcb888828ccd7c4dfcc234a370

  • SHA512

    ce4a7e42738154183fc53702f0841dfd4ad1eb0567b13cc1ff0909f1d330e9cd2fb994375efc6f02e7eddaaae1f465ff93458412143266afdaff1c6bf6477fc3

  • SSDEEP

    3072:rYXT8PUsMNL8V4tD2My/JAAbQoM29wlV58lbNnolY7VgsYiVTPtiTu/q:rowUsML8g2j0o9wb0bNoaKsYImui

Malware Config

Signatures

  • Renames multiple (3999) files with added filename extension

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

  • Drops file in Drivers directory 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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
  • Drops file in System32 directory 64 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies Control Panel 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Documents\Ransomware.TeslaCrypt\Ransomware.TeslaCrypt\3372c1edab46837f1e973164fa2d726c5c5e17bcb888828ccd7c4dfcc234a370.exe
    "C:\Users\Admin\AppData\Local\Temp\Documents\Ransomware.TeslaCrypt\Ransomware.TeslaCrypt\3372c1edab46837f1e973164fa2d726c5c5e17bcb888828ccd7c4dfcc234a370.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4288
    • C:\Users\Admin\AppData\Roaming\losfeea.exe
      C:\Users\Admin\AppData\Roaming\losfeea.exe
      2⤵
      • Drops file in Drivers directory
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops file in System32 directory
      • Sets desktop wallpaper using registry
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • Modifies Control Panel
      • Suspicious behavior: EnumeratesProcesses
      PID:4032
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\DOCUME~1\RANSOM~1.TES\RANSOM~1.TES\3372C1~1.EXE >> NUL
      2⤵
        PID:3020
    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4340,i,17096020621006928097,15544233752327415349,262144 --variations-seed-version --mojo-platform-channel-handle=3596 /prefetch:8
      1⤵
        PID:4988

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Roaming\losfeea.exe

        Filesize

        284KB

        MD5

        209a288c68207d57e0ce6e60ebf60729

        SHA1

        e654d39cd13414b5151e8cf0d8f5b166dddd45cb

        SHA256

        3372c1edab46837f1e973164fa2d726c5c5e17bcb888828ccd7c4dfcc234a370

        SHA512

        ce4a7e42738154183fc53702f0841dfd4ad1eb0567b13cc1ff0909f1d330e9cd2fb994375efc6f02e7eddaaae1f465ff93458412143266afdaff1c6bf6477fc3