Analysis

  • max time kernel
    135s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231023-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-11-2023 16:36

General

  • Target

    NEAS.640ef9afce45a61a02970462b829bf37a845948c17d72577dc70c1c21aa55b23.url

  • Size

    204B

  • MD5

    9125bafd876eda003abefbcfd3280900

  • SHA1

    5d045bdedaae6242de78f8a89fceca748f279a0d

  • SHA256

    640ef9afce45a61a02970462b829bf37a845948c17d72577dc70c1c21aa55b23

  • SHA512

    69df286a83a636dbdaf9a2b0e4b30ff8b716245244f475ee945f498aadd37d5cab9edef3e1a73710d46eb4b36e99daa39bb4201b26ae149eff63896aead13111

Score
10/10

Malware Config

Extracted

Family

systembc

C2

62.173.140.37:4001

Signatures

  • SystemBC

    SystemBC is a proxy and remote administration tool first seen in 2019.

  • Blocklisted process makes network request 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Loads dropped DLL 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Windows\System32\rundll32.exe
    "C:\Windows\System32\rundll32.exe" "C:\Windows\System32\ieframe.dll",OpenURL C:\Users\Admin\AppData\Local\Temp\NEAS.640ef9afce45a61a02970462b829bf37a845948c17d72577dc70c1c21aa55b23.url
    1⤵
    • Checks computer location settings
    • Modifies registry class
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:4320
    • C:\Windows\System32\control.exe
      "C:\Windows\System32\control.exe" "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\E51EX1F6\wizard[1].cpl",
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4164
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" Shell32.dll,Control_RunDLL "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\E51EX1F6\wizard[1].cpl",
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:448
        • C:\Windows\SysWOW64\rundll32.exe
          "C:\Windows\SysWOW64\rundll32.exe" "C:\Windows\SysWOW64\shell32.dll",#44 "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\E51EX1F6\wizard[1].cpl",
          4⤵
          • Blocklisted process makes network request
          • Loads dropped DLL
          PID:2036

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\E51EX1F6\wizard[1].cpl

    Filesize

    16KB

    MD5

    cac81707eba1be452f548e410275a0ac

    SHA1

    dd4b3bbd8bf357bbdeeb593e94ff0bf9b5ae19f2

    SHA256

    2f120d396f71ff9adb8fe11f0b529e8ddea8355837d955fed83bb0ae2a35de84

    SHA512

    01b6b45ec3c5ef4a0162164dfd69c15b08ed37082778ef97d0f1486bc82b4b1659a90705a4d9be42b9d25c8776e20011845a9f5e4498400b11cf14a3310df8d7

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\E51EX1F6\wizard[1].cpl

    Filesize

    16KB

    MD5

    cac81707eba1be452f548e410275a0ac

    SHA1

    dd4b3bbd8bf357bbdeeb593e94ff0bf9b5ae19f2

    SHA256

    2f120d396f71ff9adb8fe11f0b529e8ddea8355837d955fed83bb0ae2a35de84

    SHA512

    01b6b45ec3c5ef4a0162164dfd69c15b08ed37082778ef97d0f1486bc82b4b1659a90705a4d9be42b9d25c8776e20011845a9f5e4498400b11cf14a3310df8d7