MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256c4701d1b7ec4e4e0b4e15e896f9fd0e05e26f329e19cfd446ceb5035b6877c4c
MD5aeb7d5dc262a7bdeb1d45d148664b89c
File Typevbe
Size1262.7 KB
First Seen2025-11-27
File Namee-dekont.pdf.vbe
TagsMassLogger, vbe

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: c4701d1b7ec4e4e0b4e15e896f9fd0e05e26f329e19cfd446ceb5035b6877c4c
  • MD5: aeb7d5dc262a7bdeb1d45d148664b89c

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: c4701d1b7ec4e4e0"
        threat_level = "medium"
        first_seen = "2025-11-27"
    condition:
        hash.sha256(0, filesize) == "c4701d1b7ec4e4e0b4e15e896f9fd0e05e26f329e19cfd446ceb5035b6877c4c"
}

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 c4701d1b7ec4e4e0b4e15e896f9fd0e05e26f329e19cfd446ceb5035b6877c4c # MD5 aeb7d5dc262a7bdeb1d45d148664b89c
TypeValueNote
sha256 c4701d1b7ec4e4e0b4e15e896f9fd0e05e26f329e19cfd446ceb5035b6877c4c Sample:MassLogger
md5 aeb7d5dc262a7bdeb1d45d148664b89c Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi