MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256371e5213895306bc58052925b92da7af2770b12683525c7361934b6477399f54
MD53cc7271eb36434b1ca5830f483be147e
File Typeexe
Size535.5 KB
First Seen2025-07-29
File NameInquiry.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: 371e5213895306bc58052925b92da7af2770b12683525c7361934b6477399f54
  • MD5: 3cc7271eb36434b1ca5830f483be147e

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: 371e5213895306bc"
        threat_level = "medium"
        first_seen = "2025-07-29"
    condition:
        hash.sha256(0, filesize) == "371e5213895306bc58052925b92da7af2770b12683525c7361934b6477399f54"
}

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 371e5213895306bc58052925b92da7af2770b12683525c7361934b6477399f54 # MD5 3cc7271eb36434b1ca5830f483be147e
TypeValueNote
sha256 371e5213895306bc58052925b92da7af2770b12683525c7361934b6477399f54 Sample:MassLogger
md5 3cc7271eb36434b1ca5830f483be147e Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi