MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b6e88036965099c2a668babccab6718f461c41e46139f11f5c95f24bee8bea16
MD5a143a1174b356002ea38f5e5233a0b69
File Typeexe
Size682.0 KB
First Seen2025-08-11
File Name22.exe
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: b6e88036965099c2a668babccab6718f461c41e46139f11f5c95f24bee8bea16
  • MD5: a143a1174b356002ea38f5e5233a0b69

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: b6e88036965099c2"
        threat_level = "medium"
        first_seen = "2025-08-11"
    condition:
        hash.sha256(0, filesize) == "b6e88036965099c2a668babccab6718f461c41e46139f11f5c95f24bee8bea16"
}

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 b6e88036965099c2a668babccab6718f461c41e46139f11f5c95f24bee8bea16 # MD5 a143a1174b356002ea38f5e5233a0b69
TypeValueNote
sha256 b6e88036965099c2a668babccab6718f461c41e46139f11f5c95f24bee8bea16 Sample:MassLogger
md5 a143a1174b356002ea38f5e5233a0b69 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi