MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25634b465b5e58b4773c0726d718e9b82c7f09d14f9ed3dda6441f68d9b57212e92
MD5648b51902534f6b848d2a0dd9ac8297c
File Typerar
Size469.3 KB
First Seen2025-07-29
File NameInquiry.tbz
TagsMassLogger, rar, tbz

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: 34b465b5e58b4773c0726d718e9b82c7f09d14f9ed3dda6441f68d9b57212e92
  • MD5: 648b51902534f6b848d2a0dd9ac8297c

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: 34b465b5e58b4773"
        threat_level = "medium"
        first_seen = "2025-07-29"
    condition:
        hash.sha256(0, filesize) == "34b465b5e58b4773c0726d718e9b82c7f09d14f9ed3dda6441f68d9b57212e92"
}

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 34b465b5e58b4773c0726d718e9b82c7f09d14f9ed3dda6441f68d9b57212e92 # MD5 648b51902534f6b848d2a0dd9ac8297c
TypeValueNote
sha256 34b465b5e58b4773c0726d718e9b82c7f09d14f9ed3dda6441f68d9b57212e92 Sample:MassLogger
md5 648b51902534f6b848d2a0dd9ac8297c Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi