General

  • Target

    YHN4K_random.exe

  • Size

    6.1MB

  • Sample

    250406-g42d7asyfs

  • MD5

    6d59590bcc2cf8dc925d9edbf55a5001

  • SHA1

    c615992b8ed47f13000c1253ca6c1e5cd8eacba9

  • SHA256

    52eca724693525d2df076c0af355f8945af9a77dcb0e9a644ede46eb02674eeb

  • SHA512

    c687d0b597bdfba4209721284d51cb09efc74b28a516513de740ed04d2a7648227ca11850c3663149d4963ad22bf7be3507af1a18ac2c0bb6a90eb8f3b039e05

  • SSDEEP

    196608:i+XP7VLihuEaC+oz4k6Kc2vnrClAZxQ9Qh9WJCWDiJm5z:i+/7VL4uy4kddvrClEQ9Qh0C/Jm5

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

http://176.113.115.7/mine/random.exe

Extracted

Family

amadey

Version

5.21

Botnet

092155

C2

http://176.113.115.6

Attributes
  • install_dir

    bb556cff4a

  • install_file

    rapes.exe

  • strings_key

    a131b127e996a898cd19ffb2d92e481b

  • url_paths

    /Ni9kiput/index.php

rc4.plain

Extracted

Family

lumma

C2

https://pepperiop.digital/oage

https://7jrxsafer.top/shpaoz

https://plantainklj.run/opafg

https://puerrogfh.live/iqwez

https://quavabvc.top/iuzhd

https://9advennture.top/GKsiio

https://targett.top/dsANGt

https://rambutanvcx.run/adioz

https://ywmedici.top/noagis

https://rodformi.run/aUosoz

https://metalsyo.digital/opsa

https://ironloxp.live/aksdd

https://navstarx.shop/FoaJSi

https://wstarcloc.bet/GOksAo

https://advennture.top/GKsiio

https://atargett.top/dsANGt

https://spacedbv.world/EKdlsk

https://galxnetb.today/GsuIAo

https://xrfxcaseq.live/gspaz

https://jrxsafer.top/shpaoz

Extracted

Family

gcleaner

C2

185.156.73.98

45.91.200.135

Extracted

Family

quasar

Version

1.5.0

Botnet

Office04

C2

goku92ad.zapto.org:5000

Mutex

a0766e5c-a1d1-4766-a1f5-4e4f9f9fe35a

Attributes
  • encryption_key

    BF72099FDBC6B48816529089CF1CF2CF86357D14

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Modded Client Startup

  • subdirectory

    SubDir

Extracted

Family

xworm

Version

5.0

C2

127.0.0.1:9000

45.134.39.20:9000

Mutex

oV8zKY7m1pKloRzQ

Attributes
  • install_file

    USB.exe

aes.plain

Targets

    • Target

      YHN4K_random.exe

    • Size

      6.1MB

    • MD5

      6d59590bcc2cf8dc925d9edbf55a5001

    • SHA1

      c615992b8ed47f13000c1253ca6c1e5cd8eacba9

    • SHA256

      52eca724693525d2df076c0af355f8945af9a77dcb0e9a644ede46eb02674eeb

    • SHA512

      c687d0b597bdfba4209721284d51cb09efc74b28a516513de740ed04d2a7648227ca11850c3663149d4963ad22bf7be3507af1a18ac2c0bb6a90eb8f3b039e05

    • SSDEEP

      196608:i+XP7VLihuEaC+oz4k6Kc2vnrClAZxQ9Qh9WJCWDiJm5z:i+/7VL4uy4kddvrClEQ9Qh0C/Jm5

    • Amadey

      Amadey bot is a simple trojan bot primarily used for collecting reconnaissance information.

    • Amadey family

    • Detect Xworm Payload

    • GCleaner

      GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.

    • Gcleaner family

    • Lumma Stealer, LummaC

      Lumma or LummaC is an infostealer written in C++ first seen in August 2022.

    • Lumma family

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Xworm family

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Downloads MZ/PE file

    • Sets service image path in registry

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Deletes itself

    • Drops startup file

    • Executes dropped EXE

    • Identifies Wine through registry keys

      Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

    • Loads dropped DLL

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

    • Enumerates processes with tasklist

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks