MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2564fd17cabd75688a8689188dcd5c1290f2075839a9d1825007e1df05e5390f4af
MD5da0e465eab6f491a799bae6164bb58ad
File Typeexe
Size520.0 KB
First Seen2025-08-12
File Name4fd17cabd75688a8689188dcd5c1290f2075839a9d1825007e1df05e5390f4af
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: 4fd17cabd75688a8689188dcd5c1290f2075839a9d1825007e1df05e5390f4af
  • MD5: da0e465eab6f491a799bae6164bb58ad

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: 4fd17cabd75688a8"
        threat_level = "medium"
        first_seen = "2025-08-12"
    condition:
        hash.sha256(0, filesize) == "4fd17cabd75688a8689188dcd5c1290f2075839a9d1825007e1df05e5390f4af"
}

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 4fd17cabd75688a8689188dcd5c1290f2075839a9d1825007e1df05e5390f4af # MD5 da0e465eab6f491a799bae6164bb58ad
TypeValueNote
sha256 4fd17cabd75688a8689188dcd5c1290f2075839a9d1825007e1df05e5390f4af Sample:MassLogger
md5 da0e465eab6f491a799bae6164bb58ad Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi