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Overview

overview

10

Static

static

1

Bestar Ste...23.exe

windows7-x64

10

Bestar Ste...23.exe

windows10-2004-x64

9

Analysis

  • max time kernel
    84s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/04/2023, 10:46

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General

  • Target

    Bestar Steel RFQ 0100423(MECH)NBI April-1423.exe

  • Size

    743KB

  • MD5

    7b2a0af9c2e205c94e844ad81f8a5e28

  • SHA1

    d34260f61c9924d5b930500793cb26790fc1f71e

  • SHA256

    856c8bb75c2b8c79b99f9249c201d20838251a94a4f830afa7995a3af0952842

  • SHA512

    d2fc07067d70257f199b22aac86436528abe6cb111ca300f1405e39a942e55d74b4b7eb16ef2fad748df55861f0ed7f566a2c8205cc1fb50c154b8249720d02d

  • SSDEEP

    12288:y/MiJO0BLWwL/Gl6uldjwUyhhUh/GsE0C3OWQqpiHHsYsr9ws7LB:ytI04YnulW3CO7hOW5SHsYsZwCLB

Score
9/10
evasion

Malware Config

Signatures

  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
    evasion
  • Looks for VMWare Tools registry key 2 TTPs 1 IoCs
    evasion
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistence
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Bestar Steel RFQ 0100423(MECH)NBI April-1423.exe
    "C:\Users\Admin\AppData\Local\Temp\Bestar Steel RFQ 0100423(MECH)NBI April-1423.exe"
    1⤵
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Checks computer location settings
    • Maps connected drives based on registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2804
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mDCsLcbtJNBW" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFB0E.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:4192
    • C:\Users\Admin\AppData\Local\Temp\Bestar Steel RFQ 0100423(MECH)NBI April-1423.exe
      "{path}"
      2⤵
        PID:1908
      • C:\Users\Admin\AppData\Local\Temp\Bestar Steel RFQ 0100423(MECH)NBI April-1423.exe
        "{path}"
        2⤵
          PID:1456
        • C:\Users\Admin\AppData\Local\Temp\Bestar Steel RFQ 0100423(MECH)NBI April-1423.exe
          "{path}"
          2⤵
            PID:4376
          • C:\Users\Admin\AppData\Local\Temp\Bestar Steel RFQ 0100423(MECH)NBI April-1423.exe
            "{path}"
            2⤵
              PID:4364
            • C:\Users\Admin\AppData\Local\Temp\Bestar Steel RFQ 0100423(MECH)NBI April-1423.exe
              "{path}"
              2⤵
                PID:2676

            Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Temp\tmpFB0E.tmp
              Filesize

              1KB

              MD5

              2aa064937b7a9c4ddafd38e77b4c0ade

              SHA1

              0c89e6488db31900c696f2347ad635c94a1d82ea

              SHA256

              8c56923117c82556c2c9c940d310db5eca0d1f48c3c7afe60680f94b107a78a2

              SHA512

              f6b46349edb976019c1e25b46436b514a4753af0d737581e3445d7aaeb9db88478df6977fe8f7d60ec253e36b48097c4aea1c464de70b7ac7300140560cfac6a

              Download Submit

            • memory/2804-133-0x0000000000C90000-0x0000000000D4E000-memory.dmp

              Filesize

              760KB

              Download

            • memory/2804-134-0x00000000056A0000-0x000000000573C000-memory.dmp

              Filesize

              624KB

              Download

            • memory/2804-135-0x0000000005D70000-0x0000000006314000-memory.dmp

              Filesize

              5.6MB

              Download

            • memory/2804-136-0x0000000005860000-0x00000000058F2000-memory.dmp

              Filesize

              584KB

              Download

            • memory/2804-137-0x0000000005840000-0x0000000005850000-memory.dmp

              Filesize

              64KB

              Download

            • memory/2804-138-0x0000000005770000-0x000000000577A000-memory.dmp

              Filesize

              40KB

              Download

            • memory/2804-139-0x00000000059F0000-0x0000000005A46000-memory.dmp

              Filesize

              344KB

              Download

            • memory/2804-140-0x0000000005840000-0x0000000005850000-memory.dmp

              Filesize

              64KB

              Download

            • memory/2804-141-0x000000000C830000-0x000000000C896000-memory.dmp

              Filesize

              408KB

              Download