Overview

overview

10

Static

static

3

New PO as ...42.exe

windows7-x64

10

New PO as ...42.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 14:27

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General

  • Target

    New PO as per attached-2020-6642.exe

  • Size

    44KB

  • MD5

    b17644b26f54aee17d39cb7bfceee846

  • SHA1

    a6b0b1155257bbaf9d710fd8d9b92b94601d82d9

  • SHA256

    6f840786f7756f4b7bd84cfc327477af8a3aa99ba9768581f52a7ba3df9af806

  • SHA512

    bad64051fe0604f25630515ffa703304c153752664b846f1f90e8dc0d3bd3c426ccef8b169f013ba3d49dbaf4715be39ae3a0e8ff08ea6177427b22f459eeb93

  • SSDEEP

    768:mVPH8IEd7Qs5a3V4IYRaacERTW3Mst3L:mVPcIm8Ua3GI9Xtb

Score
10/10
guloaderdownloaderpersistence

Malware Config

Extracted

Family

guloader

C2

https://onedrive.live.com/download?cid=A32AEA2B4355716B&resid=A32AEA2B4355716B%214978&authkey=AI9mqOKtOkBDroM

xor.base64

Signatures

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

    downloaderguloader
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\New PO as per attached-2020-6642.exe
    "C:\Users\Admin\AppData\Local\Temp\New PO as per attached-2020-6642.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2864
    • C:\Users\Admin\AppData\Local\Temp\New PO as per attached-2020-6642.exe
      "C:\Users\Admin\AppData\Local\Temp\New PO as per attached-2020-6642.exe"
      2⤵
      • Checks computer location settings
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of WriteProcessMemory
      PID:616
      • C:\Users\Admin\Sandsynliggres\rainmak.exe
        "C:\Users\Admin\Sandsynliggres\rainmak.exe"
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of SetThreadContext
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2428
        • C:\Users\Admin\Sandsynliggres\rainmak.exe
          "C:\Users\Admin\Sandsynliggres\rainmak.exe"
          4⤵
          • Loads dropped DLL
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          PID:3868

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\Sandsynliggres\rainmak.exe
    Filesize

    44KB

    MD5

    b17644b26f54aee17d39cb7bfceee846

    SHA1

    a6b0b1155257bbaf9d710fd8d9b92b94601d82d9

    SHA256

    6f840786f7756f4b7bd84cfc327477af8a3aa99ba9768581f52a7ba3df9af806

    SHA512

    bad64051fe0604f25630515ffa703304c153752664b846f1f90e8dc0d3bd3c426ccef8b169f013ba3d49dbaf4715be39ae3a0e8ff08ea6177427b22f459eeb93

    Download Submit

  • memory/616-4-0x0000000000400000-0x00000000004E7000-memory.dmp

    Filesize

    924KB

    Download

  • memory/616-9-0x0000000077661000-0x0000000077781000-memory.dmp

    Filesize

    1.1MB

    Download

  • memory/616-8-0x00000000004F0000-0x00000000005F0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/616-21-0x00000000004F0000-0x00000000005F0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2428-24-0x00000000028C0000-0x00000000028C7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/2428-25-0x0000000077661000-0x0000000077781000-memory.dmp

    Filesize

    1.1MB

    Download

  • memory/2428-29-0x00000000028C0000-0x00000000028C7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/2864-2-0x0000000002A00000-0x0000000002A07000-memory.dmp

    Filesize

    28KB

    Download

  • memory/2864-3-0x0000000077661000-0x0000000077781000-memory.dmp

    Filesize

    1.1MB

    Download

  • memory/2864-6-0x0000000002A00000-0x0000000002A07000-memory.dmp

    Filesize

    28KB

    Download

  • memory/3868-30-0x00000000004F0000-0x00000000005F0000-memory.dmp

    Filesize

    1024KB

    Download