Analysis

  • max time kernel
    144s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/10/2024, 01:50

General

  • Target
    d322df678d8d8b40b30c463a51395a961b0a703a01523d6def82a4679b5729a6.exe
  • Size 898KB
  • Sample241005-b9mkbsydmn
  • SHA256 d322df678d8d8b40b30c463a51395a961b0a703a01523d6def82a4679b5729a6
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • Loads dropped DLL 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d322df678d8d8b40b30c463a51395a961b0a703a01523d6def82a4679b5729a6.exe
    "C:\Users\Admin\AppData\Local\Temp\d322df678d8d8b40b30c463a51395a961b0a703a01523d6def82a4679b5729a6.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:2520
    • C:\Users\Admin\AppData\Local\Temp\d322df678d8d8b40b30c463a51395a961b0a703a01523d6def82a4679b5729a6.exe
      "C:\Users\Admin\AppData\Local\Temp\d322df678d8d8b40b30c463a51395a961b0a703a01523d6def82a4679b5729a6.exe"
      2⤵
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      PID:1740

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        System.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nsj830E.tmp\System.dll
        • Size 12KB
        • SHA256 a4ec98011ef99e595912718c1a1bf1aa67bfc2192575729d42f559d01f67b95c
        • MD5 SHA1 SHA512 SSDEEP

        memory/1740-17-0x0000000077565000-0x0000000077566000-memory.dmp

        memory/1740-13-0x0000000000400000-0x0000000001654000-memory.dmp

        memory/1740-14-0x0000000001660000-0x00000000021B6000-memory.dmp

        memory/1740-15-0x0000000001660000-0x00000000021B6000-memory.dmp

        memory/1740-16-0x0000000077548000-0x0000000077549000-memory.dmp

        memory/1740-21-0x00000000774C1000-0x00000000775E1000-memory.dmp

        memory/1740-22-0x0000000000400000-0x0000000001654000-memory.dmp

        memory/2520-10-0x0000000005340000-0x0000000005E96000-memory.dmp

        memory/2520-11-0x00000000774C1000-0x00000000775E1000-memory.dmp

        memory/2520-12-0x00000000741A5000-0x00000000741A6000-memory.dmp

        memory/2520-9-0x0000000005340000-0x0000000005E96000-memory.dmp

        memory/2520-27-0x0000000005340000-0x0000000005E96000-memory.dmp