MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2563bfa7c6277bdfda864147dd63efb71a20ffc8e56e6d224a2ec2c494d94d01da4
MD5f53bbc7e2ae5ba7fd1cd6956c3f0fccb
File Typevbs
Size15.8 KB
First Seen2025-07-29
File NameRFQ29072025#625341,pdf.vbs
TagsMassLogger, vbs

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: 3bfa7c6277bdfda864147dd63efb71a20ffc8e56e6d224a2ec2c494d94d01da4
  • MD5: f53bbc7e2ae5ba7fd1cd6956c3f0fccb

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: 3bfa7c6277bdfda8"
        threat_level = "medium"
        first_seen = "2025-07-29"
    condition:
        hash.sha256(0, filesize) == "3bfa7c6277bdfda864147dd63efb71a20ffc8e56e6d224a2ec2c494d94d01da4"
}

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 3bfa7c6277bdfda864147dd63efb71a20ffc8e56e6d224a2ec2c494d94d01da4 # MD5 f53bbc7e2ae5ba7fd1cd6956c3f0fccb
TypeValueNote
sha256 3bfa7c6277bdfda864147dd63efb71a20ffc8e56e6d224a2ec2c494d94d01da4 Sample:MassLogger
md5 f53bbc7e2ae5ba7fd1cd6956c3f0fccb Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi