MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256bb0a40428ac8a891818d737980ce6fa91e8d7422a759a41b326ee41ac004d57a
MD55d9839fb71808369a17d8182459763c8
File Typeexe
Size5399.5 KB
First Seen2025-12-08
File Namebb0a40428ac8a891818d737980ce6fa91e8d7422a759a41b326ee41ac004d57a
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: bb0a40428ac8a891818d737980ce6fa91e8d7422a759a41b326ee41ac004d57a
  • MD5: 5d9839fb71808369a17d8182459763c8

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: bb0a40428ac8a891"
        threat_level = "medium"
        first_seen = "2025-12-08"
    condition:
        hash.sha256(0, filesize) == "bb0a40428ac8a891818d737980ce6fa91e8d7422a759a41b326ee41ac004d57a"
}

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 bb0a40428ac8a891818d737980ce6fa91e8d7422a759a41b326ee41ac004d57a # MD5 5d9839fb71808369a17d8182459763c8
TypeValueNote
sha256 bb0a40428ac8a891818d737980ce6fa91e8d7422a759a41b326ee41ac004d57a Sample:MassLogger
md5 5d9839fb71808369a17d8182459763c8 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi