MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25655499e84279923662fb507ec1fadd641e696d08ed2dbf75aa5b9edfe84d91556
MD50b7e6a2c7a92b42665bb55416200bad7
File Typeexe
Size553.5 KB
First Seen2025-10-09
File Name55499e84279923662fb507ec1fadd641e696d08ed2dbf75aa5b9edfe84d91556
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: 55499e84279923662fb507ec1fadd641e696d08ed2dbf75aa5b9edfe84d91556
  • MD5: 0b7e6a2c7a92b42665bb55416200bad7

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: 55499e8427992366"
        threat_level = "medium"
        first_seen = "2025-10-09"
    condition:
        hash.sha256(0, filesize) == "55499e84279923662fb507ec1fadd641e696d08ed2dbf75aa5b9edfe84d91556"
}

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 55499e84279923662fb507ec1fadd641e696d08ed2dbf75aa5b9edfe84d91556 # MD5 0b7e6a2c7a92b42665bb55416200bad7
TypeValueNote
sha256 55499e84279923662fb507ec1fadd641e696d08ed2dbf75aa5b9edfe84d91556 Sample:MassLogger
md5 0b7e6a2c7a92b42665bb55416200bad7 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi