MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256c34631c58915e547e7cc7c0cb2675d04d42864648e211892b054e76d136ba473
MD52a23362def44e0b0a29adf310351bde1
File Typeexe
Size570.4 KB
First Seen2026-03-06
File Namec34631c58915e547e7cc7c0cb2675d04d42864648e211892b054e76d136ba473
Tagsbot8257734127, exe, 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: c34631c58915e547e7cc7c0cb2675d04d42864648e211892b054e76d136ba473
  • MD5: 2a23362def44e0b0a29adf310351bde1

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: c34631c58915e547"
        threat_level = "medium"
        first_seen = "2026-03-06"
    condition:
        hash.sha256(0, filesize) == "c34631c58915e547e7cc7c0cb2675d04d42864648e211892b054e76d136ba473"
}

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 c34631c58915e547e7cc7c0cb2675d04d42864648e211892b054e76d136ba473 # MD5 2a23362def44e0b0a29adf310351bde1
TypeValueNote
sha256 c34631c58915e547e7cc7c0cb2675d04d42864648e211892b054e76d136ba473 Sample:MassLogger
md5 2a23362def44e0b0a29adf310351bde1 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi