Analysis

  • max time kernel
    136s
  • max time network
    108s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-07-2024 11:44

General

  • Target

    CEMENTOS-DOC.exe

  • Size

    60KB

  • MD5

    b7974ace4e5436770ce9b63a315fab68

  • SHA1

    43aed757f4864e1fab98d88faf690d84435d036e

  • SHA256

    994655b2cfd0979f7b96ae1f4423510633a82adf92fa6486dfd2f3243e96618d

  • SHA512

    287938f69f46de39ceeb2bc078dbc6b6e0850f0ad0df676717bd0dba31ae1be4492dbf584c3c816ef7368a1eb01b5ddcbabee7341efc8cfb66fd1503008927cd

  • SSDEEP

    768:CZZ3hCu+e5MxzVZpXEewlIAc9BRYxLznw72c:0rCupIZZFrWIbW/c

Malware Config

Extracted

Family

guloader

C2

https://drive.google.com/uc?export=download&id=1LmyqIluFJ5HoNT0VjWSvtPFmVfK-cvxy

xor.base64

Signatures

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • Checks QEMU agent file 2 TTPs 1 IoCs

    Checks presence of QEMU agent, possibly to detect virtualization.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

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

  • Suspicious use of SetWindowsHookEx 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\CEMENTOS-DOC.exe
    "C:\Users\Admin\AppData\Local\Temp\CEMENTOS-DOC.exe"
    1⤵
    • Checks QEMU agent file
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    PID:5020

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/5020-2-0x0000000002240000-0x000000000224A000-memory.dmp

    Filesize

    40KB

  • memory/5020-3-0x00000000773A1000-0x00000000774C1000-memory.dmp

    Filesize

    1.1MB

  • memory/5020-4-0x0000000002240000-0x000000000224A000-memory.dmp

    Filesize

    40KB