MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256c0a6d0d1479d793eed9afdff1ce6c68be109ac586b0ab209721286bf2eb4a8bc
MD5a1975008ece68fae1ccb17df20a61290
File Typeexe
Size992.0 KB
First Seen2025-11-05
File NameImportant Urgent Review-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: c0a6d0d1479d793eed9afdff1ce6c68be109ac586b0ab209721286bf2eb4a8bc
  • MD5: a1975008ece68fae1ccb17df20a61290

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: c0a6d0d1479d793e"
        threat_level = "medium"
        first_seen = "2025-11-05"
    condition:
        hash.sha256(0, filesize) == "c0a6d0d1479d793eed9afdff1ce6c68be109ac586b0ab209721286bf2eb4a8bc"
}

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 c0a6d0d1479d793eed9afdff1ce6c68be109ac586b0ab209721286bf2eb4a8bc # MD5 a1975008ece68fae1ccb17df20a61290
TypeValueNote
sha256 c0a6d0d1479d793eed9afdff1ce6c68be109ac586b0ab209721286bf2eb4a8bc Sample:MassLogger
md5 a1975008ece68fae1ccb17df20a61290 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi