MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2566fa4872487313212e627cc175f66f125308cda632fc266b7c2caf6b65dd509ff
MD5a943a051e46e7972b27ab4d38f57390e
File Typerar
Size678.0 KB
First Seen2025-07-01
File NameITEMS FOR QUOTE.rar
TagsMassLogger, QUOTATION, rar

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: 6fa4872487313212e627cc175f66f125308cda632fc266b7c2caf6b65dd509ff
  • MD5: a943a051e46e7972b27ab4d38f57390e

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: 6fa4872487313212"
        threat_level = "medium"
        first_seen = "2025-07-01"
    condition:
        hash.sha256(0, filesize) == "6fa4872487313212e627cc175f66f125308cda632fc266b7c2caf6b65dd509ff"
}

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 6fa4872487313212e627cc175f66f125308cda632fc266b7c2caf6b65dd509ff # MD5 a943a051e46e7972b27ab4d38f57390e
TypeValueNote
sha256 6fa4872487313212e627cc175f66f125308cda632fc266b7c2caf6b65dd509ff Sample:MassLogger
md5 a943a051e46e7972b27ab4d38f57390e Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi