MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256fe7e6ff75fd2b334db4fddff6b5947c845943e4a85a09e65dae7e1d0e99f0437
MD5490af6803d49e1fb054d5008a1660d0c
File Typevbe
Size825.5 KB
First Seen2025-06-23
File NameTEKLIF_2306.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: fe7e6ff75fd2b334db4fddff6b5947c845943e4a85a09e65dae7e1d0e99f0437
  • MD5: 490af6803d49e1fb054d5008a1660d0c

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: fe7e6ff75fd2b334"
        threat_level = "medium"
        first_seen = "2025-06-23"
    condition:
        hash.sha256(0, filesize) == "fe7e6ff75fd2b334db4fddff6b5947c845943e4a85a09e65dae7e1d0e99f0437"
}

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 fe7e6ff75fd2b334db4fddff6b5947c845943e4a85a09e65dae7e1d0e99f0437 # MD5 490af6803d49e1fb054d5008a1660d0c
TypeValueNote
sha256 fe7e6ff75fd2b334db4fddff6b5947c845943e4a85a09e65dae7e1d0e99f0437 Sample:MassLogger
md5 490af6803d49e1fb054d5008a1660d0c Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi