MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b611335fe845cbd448a21b5592922ff6cfe567575c6d0b6da52ecd8ea6ae9954
MD51deb86e8f825976774180b08ef95cfb5
File Typeexe
Size901.5 KB
First Seen2026-03-18
File NameSecuriteInfo.com.Win32.MalwareX-gen.25248173
Tagsexe, MassLogger

Malware Family: MassLogger

MassLogger, email tabanlı keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: b611335fe845cbd448a21b5592922ff6cfe567575c6d0b6da52ecd8ea6ae9954
  • MD5: 1deb86e8f825976774180b08ef95cfb5

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: b611335fe845cbd4"
        threat_level = "medium"
        first_seen = "2026-03-18"
    condition:
        hash.sha256(0, filesize) == "b611335fe845cbd448a21b5592922ff6cfe567575c6d0b6da52ecd8ea6ae9954"
}

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 b611335fe845cbd448a21b5592922ff6cfe567575c6d0b6da52ecd8ea6ae9954 # MD5 1deb86e8f825976774180b08ef95cfb5
TypeValueNote
sha256 b611335fe845cbd448a21b5592922ff6cfe567575c6d0b6da52ecd8ea6ae9954 Sample:MassLogger
md5 1deb86e8f825976774180b08ef95cfb5 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi