MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25668a8275aa4ccac36daaef13527c2713ad7c5e185f3973c6f4327e6b48652078c
MD5d764be41291e5197af2f256c860b6394
File Typexlsx
Size2260.7 KB
First Seen2025-09-04
File NamePO_ZAGO S.r.l._23678893234_JulyPayment.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: 68a8275aa4ccac36daaef13527c2713ad7c5e185f3973c6f4327e6b48652078c
  • MD5: d764be41291e5197af2f256c860b6394

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: 68a8275aa4ccac36"
        threat_level = "medium"
        first_seen = "2025-09-04"
    condition:
        hash.sha256(0, filesize) == "68a8275aa4ccac36daaef13527c2713ad7c5e185f3973c6f4327e6b48652078c"
}

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 68a8275aa4ccac36daaef13527c2713ad7c5e185f3973c6f4327e6b48652078c # MD5 d764be41291e5197af2f256c860b6394
TypeValueNote
sha256 68a8275aa4ccac36daaef13527c2713ad7c5e185f3973c6f4327e6b48652078c Sample:MassLogger
md5 d764be41291e5197af2f256c860b6394 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi