MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256a5d6d3068c5ca9bfd295cd5e92e44e5a7c0e1d39f93e4545b59a5a92888fd880
MD5a704048a27b22b6f95d7d31027afa79d
File Typeexe
Size1142.0 KB
First Seen2025-07-07
File Namea5d6d3068c5ca9bfd295cd5e92e44e5a7c0e1d39f93e4545b59a5a92888fd880
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: a5d6d3068c5ca9bfd295cd5e92e44e5a7c0e1d39f93e4545b59a5a92888fd880
  • MD5: a704048a27b22b6f95d7d31027afa79d

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: a5d6d3068c5ca9bf"
        threat_level = "medium"
        first_seen = "2025-07-07"
    condition:
        hash.sha256(0, filesize) == "a5d6d3068c5ca9bfd295cd5e92e44e5a7c0e1d39f93e4545b59a5a92888fd880"
}

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 a5d6d3068c5ca9bfd295cd5e92e44e5a7c0e1d39f93e4545b59a5a92888fd880 # MD5 a704048a27b22b6f95d7d31027afa79d
TypeValueNote
sha256 a5d6d3068c5ca9bfd295cd5e92e44e5a7c0e1d39f93e4545b59a5a92888fd880 Sample:MassLogger
md5 a704048a27b22b6f95d7d31027afa79d Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi