General

  • Target
    http://igg-games-com
  • Sample260912-t867fsef94

Malware Config

Extracted

Family
  • acrstealer

Version
  • 4.3.8-alpha2

C2
  • imap.brightloop.cc

Decoy
  • azureedge.net

Attributes
  • ddrs

    app-api.clearflux.cc

  • guids

    4d0bf37a-3180-4974-a873-a6ec4d4dc9f9

  • user_agent

    Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.2.6187.130 Safari/537.36

xor.hex

Extracted

Family
  • hijackloader

Attributes
  • directory

    %APPDATA%\MSVS

  • inject_dll

    %windir%\SysWOW64\input.dll

xor.hex

Targets

    • Detects ACRStealer V4.x

    • Detects HijackLoader (aka IDAT Loader)

    • Family: ACR stealer,GrMsk

      ACR stealer (aka GrMsk stealer) is an infostealer written in C++.

    • Family: HijackLoader, IDAT loader, Ghostulse,

      HijackLoader is a multi-stage loader, first seen in 2023.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Indirect Command Execution

      Adversaries may abuse utilities that allow for command execution to bypass security restrictions that limit the use of command-line interpreters.

    • Loads dropped DLL

    • Reads ssh keys stored on the system

      Tries to access SSH used by SSH programs.

    • Reads user/profile data of local email clients

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

    • Reads user/profile data of web browsers

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

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • 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.

    • Drops Chrome extension

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Looks up external IP address via web service

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

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Discovers running processes

      Running process information can be used to identify security tools or plan follow-on actions.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v16

Tasks