MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b0f8191d1759ae813352bea2d7c8dee158c57c7c3b529c241b453c488480da9c
MD59b6c48b68c0615115922932157f4da2d
File Typevbe
Size1273.0 KB
First Seen2025-12-04
File NameQUOTE 005.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: b0f8191d1759ae813352bea2d7c8dee158c57c7c3b529c241b453c488480da9c
  • MD5: 9b6c48b68c0615115922932157f4da2d

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: b0f8191d1759ae81"
        threat_level = "medium"
        first_seen = "2025-12-04"
    condition:
        hash.sha256(0, filesize) == "b0f8191d1759ae813352bea2d7c8dee158c57c7c3b529c241b453c488480da9c"
}

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 b0f8191d1759ae813352bea2d7c8dee158c57c7c3b529c241b453c488480da9c # MD5 9b6c48b68c0615115922932157f4da2d
TypeValueNote
sha256 b0f8191d1759ae813352bea2d7c8dee158c57c7c3b529c241b453c488480da9c Sample:MassLogger
md5 9b6c48b68c0615115922932157f4da2d Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi