MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256d271fd8cdb9d18bb653545cee69547ca2c6114bf2e810b04d81734b323cacfe6
MD54fca6e8905a5abb80cc77adea8797ecd
File Typeexe
Size548.5 KB
First Seen2025-09-05
File Named271fd8cdb9d18bb653545cee69547ca2c6114bf2e810b04d81734b323cacfe6
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: d271fd8cdb9d18bb653545cee69547ca2c6114bf2e810b04d81734b323cacfe6
  • MD5: 4fca6e8905a5abb80cc77adea8797ecd

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: d271fd8cdb9d18bb"
        threat_level = "medium"
        first_seen = "2025-09-05"
    condition:
        hash.sha256(0, filesize) == "d271fd8cdb9d18bb653545cee69547ca2c6114bf2e810b04d81734b323cacfe6"
}

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 d271fd8cdb9d18bb653545cee69547ca2c6114bf2e810b04d81734b323cacfe6 # MD5 4fca6e8905a5abb80cc77adea8797ecd
TypeValueNote
sha256 d271fd8cdb9d18bb653545cee69547ca2c6114bf2e810b04d81734b323cacfe6 Sample:MassLogger
md5 4fca6e8905a5abb80cc77adea8797ecd Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi