MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256eb5bbf26af55849a6308af378047a9130006b3e90ac3fe80207371607d586672
MD570ae5b6921bce523f0ee57b87f6c53fb
File Typeexe
Size690.5 KB
First Seen2025-07-23
File NameAcil Teklif Talebi.exe
Tagsexe, geo, MassLogger, TUR

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: eb5bbf26af55849a6308af378047a9130006b3e90ac3fe80207371607d586672
  • MD5: 70ae5b6921bce523f0ee57b87f6c53fb

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: eb5bbf26af55849a"
        threat_level = "medium"
        first_seen = "2025-07-23"
    condition:
        hash.sha256(0, filesize) == "eb5bbf26af55849a6308af378047a9130006b3e90ac3fe80207371607d586672"
}

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 eb5bbf26af55849a6308af378047a9130006b3e90ac3fe80207371607d586672 # MD5 70ae5b6921bce523f0ee57b87f6c53fb
TypeValueNote
sha256 eb5bbf26af55849a6308af378047a9130006b3e90ac3fe80207371607d586672 Sample:MassLogger
md5 70ae5b6921bce523f0ee57b87f6c53fb Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi