MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b4fe619f5239cfca234c53e50595b86fc5c150757b25035f123e61a52d2b68a4
MD576cecc49da8400dcd44ea884c92bc052
File Typeexe
Size1053.5 KB
First Seen2025-07-01
File NamePO-01072025.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: b4fe619f5239cfca234c53e50595b86fc5c150757b25035f123e61a52d2b68a4
  • MD5: 76cecc49da8400dcd44ea884c92bc052

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: b4fe619f5239cfca"
        threat_level = "medium"
        first_seen = "2025-07-01"
    condition:
        hash.sha256(0, filesize) == "b4fe619f5239cfca234c53e50595b86fc5c150757b25035f123e61a52d2b68a4"
}

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 b4fe619f5239cfca234c53e50595b86fc5c150757b25035f123e61a52d2b68a4 # MD5 76cecc49da8400dcd44ea884c92bc052
TypeValueNote
sha256 b4fe619f5239cfca234c53e50595b86fc5c150757b25035f123e61a52d2b68a4 Sample:MassLogger
md5 76cecc49da8400dcd44ea884c92bc052 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi