MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25655b98e06e135730fa23bd4af65b161ba5055a9e915164eb99b9402ad07e6e6df
MD57965c92ef3a0bd1e92a8ff216c0fc1a0
File Typeexe
Size956.0 KB
First Seen2026-02-05
File Name55b98e06e135730fa23bd4af65b161ba5055a9e915164eb99b9402ad07e6e6df
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: 55b98e06e135730fa23bd4af65b161ba5055a9e915164eb99b9402ad07e6e6df
  • MD5: 7965c92ef3a0bd1e92a8ff216c0fc1a0

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: 55b98e06e135730f"
        threat_level = "medium"
        first_seen = "2026-02-05"
    condition:
        hash.sha256(0, filesize) == "55b98e06e135730fa23bd4af65b161ba5055a9e915164eb99b9402ad07e6e6df"
}

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 55b98e06e135730fa23bd4af65b161ba5055a9e915164eb99b9402ad07e6e6df # MD5 7965c92ef3a0bd1e92a8ff216c0fc1a0
TypeValueNote
sha256 55b98e06e135730fa23bd4af65b161ba5055a9e915164eb99b9402ad07e6e6df Sample:MassLogger
md5 7965c92ef3a0bd1e92a8ff216c0fc1a0 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi