MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25669e251263be7e552afc9949abb500dcd0567b5c3fb4091383e0e892558e0e309
MD5ef6620d3d101a35c93b789955ea4c47f
File Typexlsx
Size2200.3 KB
First Seen2025-08-25
File NameOutstanding Statement.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: 69e251263be7e552afc9949abb500dcd0567b5c3fb4091383e0e892558e0e309
  • MD5: ef6620d3d101a35c93b789955ea4c47f

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: 69e251263be7e552"
        threat_level = "medium"
        first_seen = "2025-08-25"
    condition:
        hash.sha256(0, filesize) == "69e251263be7e552afc9949abb500dcd0567b5c3fb4091383e0e892558e0e309"
}

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 69e251263be7e552afc9949abb500dcd0567b5c3fb4091383e0e892558e0e309 # MD5 ef6620d3d101a35c93b789955ea4c47f
TypeValueNote
sha256 69e251263be7e552afc9949abb500dcd0567b5c3fb4091383e0e892558e0e309 Sample:MassLogger
md5 ef6620d3d101a35c93b789955ea4c47f Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi