MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256757c468152033ae927c61acf5899c6d2d62acccdf5dd01bd94220d4df4dae676
MD5425f562bef72654adb18e8fe1ffc72f7
File Typeexe
Size715.5 KB
First Seen2025-08-01
File NameDocuments_and _Cable_specification_LDrawing_xls.scr.scr
Tagsexe, 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: 757c468152033ae927c61acf5899c6d2d62acccdf5dd01bd94220d4df4dae676
  • MD5: 425f562bef72654adb18e8fe1ffc72f7

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: 757c468152033ae9"
        threat_level = "medium"
        first_seen = "2025-08-01"
    condition:
        hash.sha256(0, filesize) == "757c468152033ae927c61acf5899c6d2d62acccdf5dd01bd94220d4df4dae676"
}

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 757c468152033ae927c61acf5899c6d2d62acccdf5dd01bd94220d4df4dae676 # MD5 425f562bef72654adb18e8fe1ffc72f7
TypeValueNote
sha256 757c468152033ae927c61acf5899c6d2d62acccdf5dd01bd94220d4df4dae676 Sample:MassLogger
md5 425f562bef72654adb18e8fe1ffc72f7 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi