Resubmissions

19/02/2022, 05:11

220219-fvblqshbep10

17/02/2022, 18:40

220217-xbmckadbe510

17/02/2022, 18:30

220217-w5he2aebek10

Analysis

  • max time kernel
    170s
  • max time network
    180s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    17/02/2022, 18:30

General

  • Target
    48dd5584cf3d6c0930f09e335d98d4fd.exe
  • Size 294KB
  • Sample220217-w5he2aebek
  • SHA256 22d5552fed81b606509972d3c12830cd2cfcd77ec68a8791706099e97b2c1bad
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • xloader

Version
  • 2.5

Campaign
  • t9hh

Decoy
  • mine.vin

  • terpenebase.com

  • potomarket.com

  • lmaproshop.com

  • multitecsd.com

  • vacationrentalsct.com

  • france-gravure.com

  • schoolq8.com

  • caravan777.com

  • mimtgexpert.com

  • animesomurie.com

  • buscalogps.online

  • legionstudio.net

  • pdam.top

  • galapaleso.quest

  • gulfweeks.com

  • sedonasuperfit.online

  • arab-xt-pro.com

  • fifeapartment.com

  • pitchgiving.com

Signatures

  • Xloader

    Xloader is a rebranded version of Formbook malware.

  • suricata: ET MALWARE FormBook CnC Checkin (GET)

    suricata: ET MALWARE FormBook CnC Checkin (GET)

  • Xloader Payload 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies data under HKEY_USERS 52 IoCs
  • Suspicious behavior: EnumeratesProcesses 52 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of WriteProcessMemory
    PID:2436
    • C:\Users\Admin\AppData\Local\Temp\48dd5584cf3d6c0930f09e335d98d4fd.exe
      "C:\Users\Admin\AppData\Local\Temp\48dd5584cf3d6c0930f09e335d98d4fd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1920
      • C:\Users\Admin\AppData\Local\Temp\tgfxcasyy.exe
        C:\Users\Admin\AppData\Local\Temp\tgfxcasyy.exe C:\Users\Admin\AppData\Local\Temp\venuwk
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1800
        • C:\Users\Admin\AppData\Local\Temp\tgfxcasyy.exe
          C:\Users\Admin\AppData\Local\Temp\tgfxcasyy.exe C:\Users\Admin\AppData\Local\Temp\venuwk
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of AdjustPrivilegeToken
          PID:3868
    • C:\Windows\SysWOW64\mstsc.exe
      "C:\Windows\SysWOW64\mstsc.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      PID:1776
  • C:\Windows\system32\MusNotifyIcon.exe
    %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
    1⤵
    • Checks processor information in registry
    PID:636
  • C:\Windows\System32\svchost.exe
    C:\Windows\System32\svchost.exe -k NetworkService -p
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    PID:1044
  • C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
    C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
    1⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    PID:520

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1776-144-0x00000000045D0000-0x0000000004660000-memory.dmp

        memory/1776-142-0x00000000006D0000-0x00000000006F9000-memory.dmp

        memory/1776-143-0x0000000004840000-0x0000000004B8A000-memory.dmp

        memory/1776-141-0x0000000000C00000-0x0000000000D3A000-memory.dmp

        memory/2436-140-0x00000000073D0000-0x00000000074FB000-memory.dmp

        memory/2436-145-0x0000000007580000-0x000000000763C000-memory.dmp

        memory/3868-139-0x00000000009F0000-0x0000000000A01000-memory.dmp

        memory/3868-138-0x000000000041D000-0x000000000041E000-memory.dmp

        memory/3868-136-0x0000000000A30000-0x0000000000D7A000-memory.dmp

        memory/3868-134-0x0000000000400000-0x0000000000429000-memory.dmp