MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256eea18a63bd83a19dc4cd25ff51bc1188aab33b96e5e24e93763c8306b66abcfc
MD53e2660ad71fe1b622096b1458c8bfc91
File Typexlsx
Size2206.7 KB
First Seen2025-08-21
File NameEURO 2023,2024, 2025.xlam
TagsCVE-2017-11882, MassLogger, xlam, xlsx

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: eea18a63bd83a19dc4cd25ff51bc1188aab33b96e5e24e93763c8306b66abcfc
  • MD5: 3e2660ad71fe1b622096b1458c8bfc91

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: eea18a63bd83a19d"
        threat_level = "medium"
        first_seen = "2025-08-21"
    condition:
        hash.sha256(0, filesize) == "eea18a63bd83a19dc4cd25ff51bc1188aab33b96e5e24e93763c8306b66abcfc"
}

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 eea18a63bd83a19dc4cd25ff51bc1188aab33b96e5e24e93763c8306b66abcfc # MD5 3e2660ad71fe1b622096b1458c8bfc91
TypeValueNote
sha256 eea18a63bd83a19dc4cd25ff51bc1188aab33b96e5e24e93763c8306b66abcfc Sample:MassLogger
md5 3e2660ad71fe1b622096b1458c8bfc91 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi