MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25613c3abc3625e06024e4ba550fc0839cca5c1d2a7eada34e15b105b4211aec7bf
MD527e419f9960c51a9a4ba97f9fc0e50fa
File Typeexe
Size947.0 KB
First Seen2025-07-22
File NameHalkbank Ekstre.exe
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: 13c3abc3625e06024e4ba550fc0839cca5c1d2a7eada34e15b105b4211aec7bf
  • MD5: 27e419f9960c51a9a4ba97f9fc0e50fa

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: 13c3abc3625e0602"
        threat_level = "medium"
        first_seen = "2025-07-22"
    condition:
        hash.sha256(0, filesize) == "13c3abc3625e06024e4ba550fc0839cca5c1d2a7eada34e15b105b4211aec7bf"
}

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 13c3abc3625e06024e4ba550fc0839cca5c1d2a7eada34e15b105b4211aec7bf # MD5 27e419f9960c51a9a4ba97f9fc0e50fa
TypeValueNote
sha256 13c3abc3625e06024e4ba550fc0839cca5c1d2a7eada34e15b105b4211aec7bf Sample:MassLogger
md5 27e419f9960c51a9a4ba97f9fc0e50fa Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi