General

  • Target

    YD0SU_file.exe

  • Size

    1.8MB

  • Sample

    241121-3cgflazpbv

  • MD5

    a68bd83f0cedd6b76cca22d5853ec168

  • SHA1

    ce0eae756e594d55f9a3835fb46fa82895c12c76

  • SHA256

    1c2f115d150d479f4ee5665477ccbfcb0ebda06e7767c90e87f55f23bacb6125

  • SHA512

    8441eb36925308b653caf7abdb34dbcb88799f14fd5fc9f11ba363206a46e83430c4caf804631b23c5dcb710da56bb691371fd5fc7a01461006387364baa85f0

  • SSDEEP

    49152:44ylfSD3avYUIh0+OZiq+ZrodAR2u6EuY:47lfSDfUHwrodAR2u5F

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

http://176.113.115.178/FF/2.png

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

http://176.113.115.178/FF/3.png

Extracted

Language
hta
Source
URLs
hta.dropper

http://176.113.115.178/Windows-Update

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

http://176.113.115.178/FF/1.png

Extracted

Family

amadey

Version

4.42

Botnet

9c9aa5

C2

http://185.215.113.43

Attributes
  • install_dir

    abc3bc1985

  • install_file

    skotes.exe

  • strings_key

    8a35cf2ea38c2817dba29a4b5b25dcf0

  • url_paths

    /Zu7JuNko/index.php

rc4.plain

Extracted

Family

xworm

C2

87.120.112.33:8398

Attributes
  • Install_directory

    %LocalAppData%

  • install_file

    svchost.exe

  • telegram

    https://api.telegram.org/bot6673004050:AAEcDfPnnGAswDvyrn9-bkOySVSnbPqLnBU/sendMessage?chat_id=1470436579

Extracted

Family

stealc

Botnet

mars

C2

http://185.215.113.206

Attributes
  • url_path

    /c4becf79229cb002.php

Targets

    • Target

      YD0SU_file.exe

    • Size

      1.8MB

    • MD5

      a68bd83f0cedd6b76cca22d5853ec168

    • SHA1

      ce0eae756e594d55f9a3835fb46fa82895c12c76

    • SHA256

      1c2f115d150d479f4ee5665477ccbfcb0ebda06e7767c90e87f55f23bacb6125

    • SHA512

      8441eb36925308b653caf7abdb34dbcb88799f14fd5fc9f11ba363206a46e83430c4caf804631b23c5dcb710da56bb691371fd5fc7a01461006387364baa85f0

    • SSDEEP

      49152:44ylfSD3avYUIh0+OZiq+ZrodAR2u6EuY:47lfSDfUHwrodAR2u5F

    • Amadey

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

    • Amadey family

    • Detect Xworm Payload

    • Modifies Windows Defender Real-time Protection settings

    • Modifies security service

    • Stealc

      Stealc is an infostealer written in C++.

    • Stealc family

    • UAC bypass

    • 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.

    • Creates new service(s)

    • Downloads MZ/PE file

    • Stops running service(s)

    • Uses browser remote debugging

      Can be used control the browser and steal sensitive information such as credentials and session cookies.

    • 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.

    • 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.

    • Indicator Removal: Clear Windows Event Logs

      Clear Windows Event Logs to hide the activity of an intrusion.

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Windows security modification

    • 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.

    • Power Settings

      powercfg controls all configurable power system settings on a Windows system and can be abused to prevent an infected host from locking or shutting down.

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks