MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b38b6cacf4c272d5d898daa36c38896c67988c97110a960b47a9b19a62cd4db2
MD53a2c01ae309570a3686431e07715f00f
File Typerar
Size651.0 KB
First Seen2026-05-20
File NameERAN_SİPARİŞ_1205_xlsx.z.rar
TagsMassLogger, rar

Malware Family: MassLogger

MassLogger, email tabanlı keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: b38b6cacf4c272d5d898daa36c38896c67988c97110a960b47a9b19a62cd4db2
  • MD5: 3a2c01ae309570a3686431e07715f00f

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: b38b6cacf4c272d5"
        threat_level = "medium"
        first_seen = "2026-05-20"
    condition:
        hash.sha256(0, filesize) == "b38b6cacf4c272d5d898daa36c38896c67988c97110a960b47a9b19a62cd4db2"
}

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 b38b6cacf4c272d5d898daa36c38896c67988c97110a960b47a9b19a62cd4db2 # MD5 3a2c01ae309570a3686431e07715f00f
TypeValueNote
sha256 b38b6cacf4c272d5d898daa36c38896c67988c97110a960b47a9b19a62cd4db2 Sample:MassLogger
md5 3a2c01ae309570a3686431e07715f00f Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi