MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2563f8054136bf16e1aa184a275e7252366ebf577932f632ee75aee2e1c477955e4
MD5d15f67f42f5c581a5535d957ecb84d7a
File Typeexe
Size1077.5 KB
First Seen2026-06-08
File Name3f8054136bf16e1aa184a275e7252366ebf577932f632ee75aee2e1c477955e4
Tagsexe, MassLogger

Malware Family: MassLogger

MassLogger, email tabanlı keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: 3f8054136bf16e1aa184a275e7252366ebf577932f632ee75aee2e1c477955e4
  • MD5: d15f67f42f5c581a5535d957ecb84d7a

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: 3f8054136bf16e1a"
        threat_level = "medium"
        first_seen = "2026-06-08"
    condition:
        hash.sha256(0, filesize) == "3f8054136bf16e1aa184a275e7252366ebf577932f632ee75aee2e1c477955e4"
}

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 3f8054136bf16e1aa184a275e7252366ebf577932f632ee75aee2e1c477955e4 # MD5 d15f67f42f5c581a5535d957ecb84d7a
TypeValueNote
sha256 3f8054136bf16e1aa184a275e7252366ebf577932f632ee75aee2e1c477955e4 Sample:MassLogger
md5 d15f67f42f5c581a5535d957ecb84d7a Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi