MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2564b0a1e4992046c74f3f3b3bee0d3f30689809d2bb6b853ba96aba01780b3c03b
MD5f02fd043cbdad9a5213b8846fc7ae2e1
File Typeexe
Size620.0 KB
First Seen2025-12-08
File Name4b0a1e4992046c74f3f3b3bee0d3f30689809d2bb6b853ba96aba01780b3c03b
Tagsexe, MassLogger

Malware Family: MassLogger

MassLogger, email keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: 4b0a1e4992046c74f3f3b3bee0d3f30689809d2bb6b853ba96aba01780b3c03b
  • MD5: f02fd043cbdad9a5213b8846fc7ae2e1

You can verify all hash values of this sample on VirusTotal.

System Cleanup Guide

  1. Disconnect the system from the network immediately
  2. Yeni bir cihazdan banka hesabı, sosyal medya ve e-posta şifrelerini değiştirin
  3. Move crypto wallets to a new address and abandon the old ones
  4. Start a full scan with up-to-date antivirus
  5. Clear saved browser passwords and enable 2FA
  6. Sign out of all sessions on every affected service

YARA Rule Hints

rule MassLogger_SHA256 {
    meta:
        description = "MassLogger sample: 4b0a1e4992046c74"
        threat_level = "medium"
        first_seen = "2025-12-08"
    condition:
        hash.sha256(0, filesize) == "4b0a1e4992046c74f3f3b3bee0d3f30689809d2bb6b853ba96aba01780b3c03b"
}

MassLogger — Malware Profile

MassLogger credential stealer. PT2600000043.js Portekiz fatura lurü. CommonJS obfuscation. dispatch configuration data.

Malware Type
Infostealer
Programming Language
C#/.NET
C2 Protocol
SMTP/FTP
Target Systems
Windows

Capabilities & Behavior

Tarayıcı Kimlik Bilgileri
Çerez Hırsızlığı
Kripto Cüzdan Çalma
Sistem Bilgisi
Ekran Görüntüsü
FTP/SSH İstemci Şifreleri
E-posta İstemcisi Çalma
Veri Sızıntısı

IOC List (2 indicators)

IOC — MassLogger
# SHA256 4b0a1e4992046c74f3f3b3bee0d3f30689809d2bb6b853ba96aba01780b3c03b # MD5 f02fd043cbdad9a5213b8846fc7ae2e1
TypeValueNote
sha256 4b0a1e4992046c74f3f3b3bee0d3f30689809d2bb6b853ba96aba01780b3c03b Sample:MassLogger
md5 f02fd043cbdad9a5213b8846fc7ae2e1 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi