MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25644f1a67e4a326b1f751b8e0671a46ff65acd9c8e9c515c764c41c87c3bf9cca8
MD54bb81a2d7409c70fc1e7a7aa8e7e7a65
File Typeexe
Size987.0 KB
First Seen2025-08-26
File NameSecuriteInfo.com.TrojanSpy.MSIL.NEGASTEAL.SMG.7216.22378
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: 44f1a67e4a326b1f751b8e0671a46ff65acd9c8e9c515c764c41c87c3bf9cca8
  • MD5: 4bb81a2d7409c70fc1e7a7aa8e7e7a65

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: 44f1a67e4a326b1f"
        threat_level = "medium"
        first_seen = "2025-08-26"
    condition:
        hash.sha256(0, filesize) == "44f1a67e4a326b1f751b8e0671a46ff65acd9c8e9c515c764c41c87c3bf9cca8"
}

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 44f1a67e4a326b1f751b8e0671a46ff65acd9c8e9c515c764c41c87c3bf9cca8 # MD5 4bb81a2d7409c70fc1e7a7aa8e7e7a65
TypeValueNote
sha256 44f1a67e4a326b1f751b8e0671a46ff65acd9c8e9c515c764c41c87c3bf9cca8 Sample:MassLogger
md5 4bb81a2d7409c70fc1e7a7aa8e7e7a65 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi