MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2566ea116b59ac03c3211143de70e7ed3843d57a39b0c87936e58d1c5c8e17b439b
MD5823c7f843211c268bdf64abeba398377
File Typeexe
Size805.0 KB
First Seen2025-09-16
File NameTA-198366 SATINALMA TEKLIF İSTEĞI_xlsx.exe
Tagsexe, MassLogger

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: 6ea116b59ac03c3211143de70e7ed3843d57a39b0c87936e58d1c5c8e17b439b
  • MD5: 823c7f843211c268bdf64abeba398377

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: 6ea116b59ac03c32"
        threat_level = "medium"
        first_seen = "2025-09-16"
    condition:
        hash.sha256(0, filesize) == "6ea116b59ac03c3211143de70e7ed3843d57a39b0c87936e58d1c5c8e17b439b"
}

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 6ea116b59ac03c3211143de70e7ed3843d57a39b0c87936e58d1c5c8e17b439b # MD5 823c7f843211c268bdf64abeba398377
TypeValueNote
sha256 6ea116b59ac03c3211143de70e7ed3843d57a39b0c87936e58d1c5c8e17b439b Sample:MassLogger
md5 823c7f843211c268bdf64abeba398377 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi