MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256425a37310e17df2084e399a5cce8a2122f948fc351370c0a471676629ef8a918
MD56e6835d0ef7dd3b945df24b682c9c28a
File Typeexe
Size1023.5 KB
First Seen2025-06-10
File Namepaymentcopy.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: 425a37310e17df2084e399a5cce8a2122f948fc351370c0a471676629ef8a918
  • MD5: 6e6835d0ef7dd3b945df24b682c9c28a

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: 425a37310e17df20"
        threat_level = "medium"
        first_seen = "2025-06-10"
    condition:
        hash.sha256(0, filesize) == "425a37310e17df2084e399a5cce8a2122f948fc351370c0a471676629ef8a918"
}

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 425a37310e17df2084e399a5cce8a2122f948fc351370c0a471676629ef8a918 # MD5 6e6835d0ef7dd3b945df24b682c9c28a
TypeValueNote
sha256 425a37310e17df2084e399a5cce8a2122f948fc351370c0a471676629ef8a918 Sample:MassLogger
md5 6e6835d0ef7dd3b945df24b682c9c28a Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi