Overview

overview

10

Static

static

3

56e3bde06c...3f.exe

windows7-x64

10

56e3bde06c...3f.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230703-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/07/2023, 11:32

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General

  • Target
    56e3bde06c00384a76ba0c230480c664630df17fd3a1d5a1bda0574d26618c3f.exe
  • Size 156KB
  • Sample230706-nm94bsac85
  • SHA256 56e3bde06c00384a76ba0c230480c664630df17fd3a1d5a1bda0574d26618c3f
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
guloaderdownloader

Malware Config

Signatures

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

    downloaderguloader
  • Checks QEMU agent file 2 TTPs 2 IoCs

    Checks presence of QEMU agent, possibly to detect virtualization.

  • Loads dropped DLL 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\56e3bde06c00384a76ba0c230480c664630df17fd3a1d5a1bda0574d26618c3f.exe
    "C:\Users\Admin\AppData\Local\Temp\56e3bde06c00384a76ba0c230480c664630df17fd3a1d5a1bda0574d26618c3f.exe"
    1⤵
    • Checks QEMU agent file
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Drops file in Program Files directory
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:1184
    • C:\Users\Admin\AppData\Local\Temp\56e3bde06c00384a76ba0c230480c664630df17fd3a1d5a1bda0574d26618c3f.exe
      "C:\Users\Admin\AppData\Local\Temp\56e3bde06c00384a76ba0c230480c664630df17fd3a1d5a1bda0574d26618c3f.exe"
      2⤵
      • Checks QEMU agent file
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      PID:3608

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        System.dll
        • Path C:\Users\Admin\AppData\Local\Temp\nsjC323.tmp\System.dll
        • Size 11KB
        • SHA256 2e226715419a5882e2e14278940ee8ef0aa648a3ef7af5b3dc252674111962bc
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        memory/1184-139-0x00000000049C0000-0x0000000006285000-memory.dmp
        Download

        memory/1184-140-0x00000000049C0000-0x0000000006285000-memory.dmp
        Download

        memory/3608-141-0x0000000000400000-0x0000000001654000-memory.dmp
        Download

        memory/3608-142-0x0000000001660000-0x0000000002F25000-memory.dmp
        Download

        memory/3608-143-0x0000000000400000-0x0000000001654000-memory.dmp
        Download

        memory/3608-153-0x0000000001660000-0x0000000002F25000-memory.dmp
        Download