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
    150s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-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
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 3 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 14 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:2420
    • 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⤵
      • Loads dropped DLL
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of WriteProcessMemory
      PID:2188
      • 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:3004
        • C:\Users\Admin\Sandsynliggres\rainmak.exe
          "C:\Users\Admin\Sandsynliggres\rainmak.exe"
          4⤵
          • Loads dropped DLL
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          PID:2744

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Cab319D.tmp
    Filesize

    68KB

    MD5

    29f65ba8e88c063813cc50a4ea544e93

    SHA1

    05a7040d5c127e68c25d81cc51271ffb8bef3568

    SHA256

    1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

    SHA512

    e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

    Download Submit

  • C:\Users\Admin\AppData\Local\Temp\Tar31B0.tmp
    Filesize

    177KB

    MD5

    435a9ac180383f9fa094131b173a2f7b

    SHA1

    76944ea657a9db94f9a4bef38f88c46ed4166983

    SHA256

    67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

    SHA512

    1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

    Download Submit

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

    44KB

    MD5

    b17644b26f54aee17d39cb7bfceee846

    SHA1

    a6b0b1155257bbaf9d710fd8d9b92b94601d82d9

    SHA256

    6f840786f7756f4b7bd84cfc327477af8a3aa99ba9768581f52a7ba3df9af806

    SHA512

    bad64051fe0604f25630515ffa703304c153752664b846f1f90e8dc0d3bd3c426ccef8b169f013ba3d49dbaf4715be39ae3a0e8ff08ea6177427b22f459eeb93

    Download Submit

  • memory/2188-5-0x0000000000400000-0x00000000004DF000-memory.dmp

    Filesize

    892KB

    Download

  • memory/2188-19-0x0000000000400000-0x00000000004DF000-memory.dmp

    Filesize

    892KB

    Download

  • memory/2188-9-0x00000000771E0000-0x0000000077389000-memory.dmp

    Filesize

    1.7MB

    Download

  • memory/2420-4-0x00000000004E0000-0x00000000004E7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/2420-3-0x00000000771E1000-0x00000000772E2000-memory.dmp

    Filesize

    1.0MB

    Download

  • memory/2420-2-0x00000000004E0000-0x00000000004E7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/2420-8-0x00000000771E0000-0x0000000077389000-memory.dmp

    Filesize

    1.7MB

    Download

  • memory/2744-28-0x00000000771E0000-0x0000000077389000-memory.dmp

    Filesize

    1.7MB

    Download

  • memory/3004-24-0x00000000002A0000-0x00000000002A7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/3004-27-0x00000000773D0000-0x00000000774A6000-memory.dmp

    Filesize

    856KB

    Download