MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256a4eea523bb2ab861736ecbb640fc0f2bb63dc5cded66d1cbd3ee8b203baa5e4d
MD5b4f7406a94723d598aab5b04ee8e4f39
File Typexlsx
Size591.7 KB
First Seen2025-07-01
File NameConfirmation of Order.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: a4eea523bb2ab861736ecbb640fc0f2bb63dc5cded66d1cbd3ee8b203baa5e4d
  • MD5: b4f7406a94723d598aab5b04ee8e4f39

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: a4eea523bb2ab861"
        threat_level = "medium"
        first_seen = "2025-07-01"
    condition:
        hash.sha256(0, filesize) == "a4eea523bb2ab861736ecbb640fc0f2bb63dc5cded66d1cbd3ee8b203baa5e4d"
}

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 a4eea523bb2ab861736ecbb640fc0f2bb63dc5cded66d1cbd3ee8b203baa5e4d # MD5 b4f7406a94723d598aab5b04ee8e4f39
TypeValueNote
sha256 a4eea523bb2ab861736ecbb640fc0f2bb63dc5cded66d1cbd3ee8b203baa5e4d Sample:MassLogger
md5 b4f7406a94723d598aab5b04ee8e4f39 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi