MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256a729c98e0f9ef110348244f1f6912688e543bec6b6fdc8c3739a7ac95562ac87
MD55f8ac8c676fc62a83f762c5615eb0b4a
File Typevbe
Size1685.0 KB
First Seen2025-07-29
File NameDHL DELIVERY NOTIFICATION_xlsx.vbe
TagsDHL, MassLogger, 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: a729c98e0f9ef110348244f1f6912688e543bec6b6fdc8c3739a7ac95562ac87
  • MD5: 5f8ac8c676fc62a83f762c5615eb0b4a

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: a729c98e0f9ef110"
        threat_level = "medium"
        first_seen = "2025-07-29"
    condition:
        hash.sha256(0, filesize) == "a729c98e0f9ef110348244f1f6912688e543bec6b6fdc8c3739a7ac95562ac87"
}

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 a729c98e0f9ef110348244f1f6912688e543bec6b6fdc8c3739a7ac95562ac87 # MD5 5f8ac8c676fc62a83f762c5615eb0b4a
TypeValueNote
sha256 a729c98e0f9ef110348244f1f6912688e543bec6b6fdc8c3739a7ac95562ac87 Sample:MassLogger
md5 5f8ac8c676fc62a83f762c5615eb0b4a Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi