Alinaos

Overview

Malware:Win32/Alinaos (commonly known simply as Alina) is an infamous and highly successful Point-of-Sale (PoS) malware family. First emerging around 2012, Alina has evolved through numerous variants (including Spark, Joker, and Eagle) and has been responsible for massive credit card data breaches in the retail and hospitality sectors. Its sole purpose is to infect Windows-based PoS terminals, scrape unencrypted credit card data from RAM (`T1005`), and exfiltrate it to attacker-controlled servers.

Understanding Alinaos (PoS RAM Scrapers)
To a retail cashier, the infected register operates normally, processing transactions without visible delay. To a security operations center (SOC) and a forensic investigator, an Alinaos infection represents a catastrophic PCI-DSS breach, leading to massive financial liability, brand damage, and regulatory fines. It highlights a critical failure in segmenting and securing the Cardholder Data Environment (CDE).

Execution and Memory Scraping Mechanics
Alinaos is typically deployed after attackers gain initial access to the corporate network (often via compromised Remote Desktop Protocol (RDP) credentials - `T1133`) and move laterally to the isolated PoS VLAN. Once executed, Alina establishes persistence, typically by modifying the `Userinit` registry key or installing itself as a hidden Windows Service. The core functionality relies on memory scraping (`T1005`). Alina continuously scans the RAM of running processes (specifically ignoring critical system processes to avoid crashing the machine) searching for data structures that match Track 1 and Track 2 magnetic stripe data. Once found, it encrypts the data, writes it to a hidden local file (`T1074.001`), and then exfiltrates it via HTTP POST requests (`T1041`), often using compromised legitimate websites as C2 proxies.

Indicators of Compromise & Impact
The impact is massive financial fraud resulting from compromised customer payment cards. Host-based IoCs include anomalous executables (often mimicking legitimate software names like `jucheck.exe` or `winampa.exe`) running out of the `%AppData%` directory on a PoS terminal. Network IoCs include the PoS terminal making unexpected outbound HTTP connections, particularly those containing specific user-agent strings associated with known Alina variants, or communicating with non-whitelisted IP addresses.

MITRE ATT&CK Techniques

Observed techniques used by this family, mapped to the MITRE ATT&CK framework:

Generated Detections (Boilerplate)

These YARA and Sigma rules are auto-generated based on the family name and aliases. They must be heavily tuned before deployment in a production environment.

YARA Rule

rule MALWARE_WIN_ALINAOS {
    meta:
        description = "Detects Alinaos (advanced_threat)"
        author = "SystemHelpdesk Boilerplate Generator"
        date = "2026-07-06"
    strings:
        $s1 = "alinaos" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

Sigma Rule

title: Suspicious Alinaos Activity
id: 3243d155d4e1d40420241d63b85468dd
status: experimental
description: Detects generic indicators of the alinaos malware family.
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
        CommandLine|contains:
            - "*alinaos*"
    condition: selection
level: medium

Containment & Response Steps

Ordered checklist for responders. Adapt to your environment and engage professional support for active incidents.

1. Immediately disconnect the infected PoS terminals from the network (unplug the Ethernet cable) to halt the exfiltration of stolen credit card data.
2. Do NOT reboot or power off the PoS terminal; volatile memory (RAM) contains critical forensic evidence, including the malware's active processes.
3. Engage a specialized Incident Response (IR) firm and a PCI Forensic Investigator (PFI) immediately, as required by PCI-DSS regulations.
4. Perform a massive enterprise hunt across the entire PoS network VLAN; PoS malware is rarely deployed to a single machine.

What to Avoid

Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.

1. Do not attempt to 'clean' the PoS terminal with standard antivirus; the machine is compromised and must be forensically imaged and then securely wiped.
2. Avoid communicating about the breach on the compromised corporate network; use out-of-band communication.

References & External Analysis

• Search "alinaos" on VirusTotal (External Analysis)

Frequently Asked Questions

Related Families (Category: advanced_threat)

Explore other malware families in the same category:

• Stufffull
• Reimage
• Rustock
• Oxypumper
• Silentall

Machine-readable

Get this profile as JSON: https://jordanricky1604-ship-it.github.io/malware-families-catalog/api/alinaos.json

Ecosystem & Interactive Environments

This profile is part of the Malware Families Catalog, a public dataset of 2,899 malware families. The catalog is also published across our ecosystem: Hugging Face, Kaggle, Zenodo, Replit, StackBlitz, CodeSandbox, and CodePen.