MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25603144acbec20eee89dd5335fb02facd0da97ca6e4c3e08b6b0adfa58aafe2533
MD5e3e97f875e0c3be75fb62692454f7908
File Typeexe
Size941.5 KB
First Seen2025-06-25
File Name65731109.exe
Tagsexe, MassLogger, PrivateLogger

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: 03144acbec20eee89dd5335fb02facd0da97ca6e4c3e08b6b0adfa58aafe2533
  • MD5: e3e97f875e0c3be75fb62692454f7908

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: 03144acbec20eee8"
        threat_level = "medium"
        first_seen = "2025-06-25"
    condition:
        hash.sha256(0, filesize) == "03144acbec20eee89dd5335fb02facd0da97ca6e4c3e08b6b0adfa58aafe2533"
}

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 03144acbec20eee89dd5335fb02facd0da97ca6e4c3e08b6b0adfa58aafe2533 # MD5 e3e97f875e0c3be75fb62692454f7908
TypeValueNote
sha256 03144acbec20eee89dd5335fb02facd0da97ca6e4c3e08b6b0adfa58aafe2533 Sample:MassLogger
md5 e3e97f875e0c3be75fb62692454f7908 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi