MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256e381d4e46d65cb09758dc5009e82940aa01f187188f1e5b38a2953abb7592aa1
MD5e2d03eebb2ebec0c1f399b9f72466d85
File Typelzh
Size150.6 KB
First Seen2025-07-01
File NameAWB_3608046257�PDF.001
Tags001, DHL, INVOICE, lzh, 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: e381d4e46d65cb09758dc5009e82940aa01f187188f1e5b38a2953abb7592aa1
  • MD5: e2d03eebb2ebec0c1f399b9f72466d85

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: e381d4e46d65cb09"
        threat_level = "medium"
        first_seen = "2025-07-01"
    condition:
        hash.sha256(0, filesize) == "e381d4e46d65cb09758dc5009e82940aa01f187188f1e5b38a2953abb7592aa1"
}

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 e381d4e46d65cb09758dc5009e82940aa01f187188f1e5b38a2953abb7592aa1 # MD5 e2d03eebb2ebec0c1f399b9f72466d85
TypeValueNote
sha256 e381d4e46d65cb09758dc5009e82940aa01f187188f1e5b38a2953abb7592aa1 Sample:MassLogger
md5 e2d03eebb2ebec0c1f399b9f72466d85 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi