MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256f4087471c45a54bc2c60cfd008f6a9bbc3d559aac5b5aebbcd5c99732ba45bd1
MD5c72e732075dfb2866d05be817e93f68e
File Typeexe
Size931.0 KB
First Seen2025-06-10
File Namef4087471c45a54bc2c60cfd008f6a9bbc3d559aac5b5aebbcd5c99732ba45bd1
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: f4087471c45a54bc2c60cfd008f6a9bbc3d559aac5b5aebbcd5c99732ba45bd1
  • MD5: c72e732075dfb2866d05be817e93f68e

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: f4087471c45a54bc"
        threat_level = "medium"
        first_seen = "2025-06-10"
    condition:
        hash.sha256(0, filesize) == "f4087471c45a54bc2c60cfd008f6a9bbc3d559aac5b5aebbcd5c99732ba45bd1"
}

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 f4087471c45a54bc2c60cfd008f6a9bbc3d559aac5b5aebbcd5c99732ba45bd1 # MD5 c72e732075dfb2866d05be817e93f68e
TypeValueNote
sha256 f4087471c45a54bc2c60cfd008f6a9bbc3d559aac5b5aebbcd5c99732ba45bd1 Sample:MassLogger
md5 c72e732075dfb2866d05be817e93f68e Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi