MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25676cff505d993baaecd718a3b0de1814da0aef73ce932d95bacbc6d842db38807
MD5c02dceb19777b922e01e19a68a260ec2
File Typeexe
Size517.5 KB
First Seen2025-09-05
File Name76cff505d993baaecd718a3b0de1814da0aef73ce932d95bacbc6d842db38807
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: 76cff505d993baaecd718a3b0de1814da0aef73ce932d95bacbc6d842db38807
  • MD5: c02dceb19777b922e01e19a68a260ec2

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: 76cff505d993baae"
        threat_level = "medium"
        first_seen = "2025-09-05"
    condition:
        hash.sha256(0, filesize) == "76cff505d993baaecd718a3b0de1814da0aef73ce932d95bacbc6d842db38807"
}

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 76cff505d993baaecd718a3b0de1814da0aef73ce932d95bacbc6d842db38807 # MD5 c02dceb19777b922e01e19a68a260ec2
TypeValueNote
sha256 76cff505d993baaecd718a3b0de1814da0aef73ce932d95bacbc6d842db38807 Sample:MassLogger
md5 c02dceb19777b922e01e19a68a260ec2 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi