MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256d221d51d7d1cdffdc5dc1afdc871610ccb744757feadc4b1841c7d983d6a4f07
MD526cc196086e7df67ca8f7b1bc153ae29
File Typegz
Size668.9 KB
First Seen2026-05-20
File NameScannedXCopy.gz
Tagsgz, MassLogger

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: d221d51d7d1cdffdc5dc1afdc871610ccb744757feadc4b1841c7d983d6a4f07
  • MD5: 26cc196086e7df67ca8f7b1bc153ae29

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: d221d51d7d1cdffd"
        threat_level = "medium"
        first_seen = "2026-05-20"
    condition:
        hash.sha256(0, filesize) == "d221d51d7d1cdffdc5dc1afdc871610ccb744757feadc4b1841c7d983d6a4f07"
}

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 d221d51d7d1cdffdc5dc1afdc871610ccb744757feadc4b1841c7d983d6a4f07 # MD5 26cc196086e7df67ca8f7b1bc153ae29
TypeValueNote
sha256 d221d51d7d1cdffdc5dc1afdc871610ccb744757feadc4b1841c7d983d6a4f07 Sample:MassLogger
md5 26cc196086e7df67ca8f7b1bc153ae29 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi