MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b2ffeb59c804b4ebcfe5f80754d4b77533ace0aed1aab2dc360b6fd4ccdf041c
MD575543690cf01029af4ad17b004c5df96
File Typeexe
Size635.5 KB
First Seen2025-08-12
File Nameb2ffeb59c804b4ebcfe5f80754d4b77533ace0aed1aab2dc360b6fd4ccdf041c
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: b2ffeb59c804b4ebcfe5f80754d4b77533ace0aed1aab2dc360b6fd4ccdf041c
  • MD5: 75543690cf01029af4ad17b004c5df96

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: b2ffeb59c804b4eb"
        threat_level = "medium"
        first_seen = "2025-08-12"
    condition:
        hash.sha256(0, filesize) == "b2ffeb59c804b4ebcfe5f80754d4b77533ace0aed1aab2dc360b6fd4ccdf041c"
}

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 b2ffeb59c804b4ebcfe5f80754d4b77533ace0aed1aab2dc360b6fd4ccdf041c # MD5 75543690cf01029af4ad17b004c5df96
TypeValueNote
sha256 b2ffeb59c804b4ebcfe5f80754d4b77533ace0aed1aab2dc360b6fd4ccdf041c Sample:MassLogger
md5 75543690cf01029af4ad17b004c5df96 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi