Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    20/02/2022, 22:57

General

  • Target
    Seznam narocil.exe
  • Size 816KB
  • Sample220220-2w85aacghp
  • SHA256 8051703485faca901060ae5b39054e5efee88909d2e1d4bb0f65126cda3230c1
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • xloader

Version
  • 2.5

Campaign
  • euv4

Decoy
  • anniebapartments.com

  • hagenbicycles.com

  • herbalist101.com

  • southerncorrosion.net

  • kuechenpruefer.com

  • tajniezdrzi.quest

  • segurofunerarioar.com

  • boardsandbeamsdecor.com

  • alifdanismanlik.com

  • pkem.top

  • mddc.clinic

  • handejqr.com

  • crux-at.com

  • awp.email

  • hugsforbubbs.com

  • cielotherepy.com

  • turkcuyuz.com

  • teamidc.com

  • lankasirinspa.com

  • 68135.online

Signatures

  • Formbook

    Formbook is a data stealing malware which is capable of stealing data.

  • 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 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 3 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 3 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Modifies data under HKEY_USERS 51 IoCs
  • Suspicious behavior: EnumeratesProcesses 50 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Drops file in Program Files directory
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of WriteProcessMemory
    PID:2436
    • C:\Users\Admin\AppData\Local\Temp\Seznam narocil.exe
      "C:\Users\Admin\AppData\Local\Temp\Seznam narocil.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:3780
      • C:\Windows\SysWOW64\logagent.exe
        C:\Windows\System32\logagent.exe
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        PID:1252
    • C:\Windows\SysWOW64\autofmt.exe
      "C:\Windows\SysWOW64\autofmt.exe"
      2⤵
        PID:3640
      • C:\Windows\SysWOW64\autochk.exe
        "C:\Windows\SysWOW64\autochk.exe"
        2⤵
          PID:3276
        • C:\Windows\SysWOW64\explorer.exe
          "C:\Windows\SysWOW64\explorer.exe"
          2⤵
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Drops file in Program Files directory
          • Modifies Internet Explorer settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:4020
          • C:\Windows\SysWOW64\cmd.exe
            /c del "C:\Windows\SysWOW64\logagent.exe"
            3⤵
              PID:2652
            • C:\Windows\SysWOW64\cmd.exe
              /c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
              3⤵
                PID:732
              • C:\Program Files\Mozilla Firefox\Firefox.exe
                "C:\Program Files\Mozilla Firefox\Firefox.exe"
                3⤵
                  PID:2096
              • C:\Program Files (x86)\Dy2sdanlx\vxvhxvto.exe
                "C:\Program Files (x86)\Dy2sdanlx\vxvhxvto.exe"
                2⤵
                • Executes dropped EXE
                PID:1224
            • C:\Windows\system32\MusNotifyIcon.exe
              %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
              1⤵
              • Checks processor information in registry
              PID:3376
            • 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:1408
            • 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:3628

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

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                  Downloads

                  memory/1252-135-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

                  memory/1252-136-0x0000000072480000-0x00000000724A9000-memory.dmp

                  memory/1252-137-0x0000000004F40000-0x000000000528A000-memory.dmp

                  memory/1252-139-0x000000007249D000-0x000000007249E000-memory.dmp

                  memory/1252-140-0x00000000033F0000-0x0000000003401000-memory.dmp

                  memory/2436-141-0x0000000007900000-0x0000000007A8D000-memory.dmp

                  memory/2436-146-0x0000000002A50000-0x0000000002B2F000-memory.dmp

                  memory/3780-130-0x0000000002140000-0x0000000002141000-memory.dmp

                  memory/3780-134-0x0000000003D16000-0x0000000003D17000-memory.dmp

                  memory/3780-132-0x0000000000406000-0x0000000000407000-memory.dmp

                  memory/4020-142-0x0000000000890000-0x0000000000CC3000-memory.dmp

                  memory/4020-143-0x0000000002CD0000-0x0000000002CF9000-memory.dmp

                  memory/4020-144-0x0000000004E90000-0x00000000051DA000-memory.dmp

                  memory/4020-145-0x0000000004CC0000-0x0000000004D50000-memory.dmp