MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2564f35ab87754acc5f4ec939fc2187279aba6c5732d7d12c3adce7991e13a8a587
MD5ccce8d66486303a4aa1de11eeb36b22a
File Typeexe
Size953.0 KB
First Seen2025-06-16
File NameInquiry No. I-25-0001257-PDF.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: 4f35ab87754acc5f4ec939fc2187279aba6c5732d7d12c3adce7991e13a8a587
  • MD5: ccce8d66486303a4aa1de11eeb36b22a

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: 4f35ab87754acc5f"
        threat_level = "medium"
        first_seen = "2025-06-16"
    condition:
        hash.sha256(0, filesize) == "4f35ab87754acc5f4ec939fc2187279aba6c5732d7d12c3adce7991e13a8a587"
}

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 4f35ab87754acc5f4ec939fc2187279aba6c5732d7d12c3adce7991e13a8a587 # MD5 ccce8d66486303a4aa1de11eeb36b22a
TypeValueNote
sha256 4f35ab87754acc5f4ec939fc2187279aba6c5732d7d12c3adce7991e13a8a587 Sample:MassLogger
md5 ccce8d66486303a4aa1de11eeb36b22a Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi