MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25673f94f60b000264f4888d7ec76a30d17459b3fa423e76217a918b0da8ef9a7bf
MD5629da9978d4bd4840688d029e85c53e8
File Typexlsx
Size2196.0 KB
First Seen2025-07-16
File NameCompany Brochure.xlam
TagsCVE-2017-11882, MassLogger, xlam, xlsx

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: 73f94f60b000264f4888d7ec76a30d17459b3fa423e76217a918b0da8ef9a7bf
  • MD5: 629da9978d4bd4840688d029e85c53e8

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: 73f94f60b000264f"
        threat_level = "medium"
        first_seen = "2025-07-16"
    condition:
        hash.sha256(0, filesize) == "73f94f60b000264f4888d7ec76a30d17459b3fa423e76217a918b0da8ef9a7bf"
}

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 73f94f60b000264f4888d7ec76a30d17459b3fa423e76217a918b0da8ef9a7bf # MD5 629da9978d4bd4840688d029e85c53e8
TypeValueNote
sha256 73f94f60b000264f4888d7ec76a30d17459b3fa423e76217a918b0da8ef9a7bf Sample:MassLogger
md5 629da9978d4bd4840688d029e85c53e8 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi