MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256399c51d6ed22fb0c649d5a148aaef55eee07060251dde6ed045c188d2f4c8b4a
MD5cee23114ee0a49913578af4341371328
File Typeexe
Size783.0 KB
First Seen2025-10-05
File NameSecuriteInfo.com.Trojan.Siggen31.59338.23958.19263
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: 399c51d6ed22fb0c649d5a148aaef55eee07060251dde6ed045c188d2f4c8b4a
  • MD5: cee23114ee0a49913578af4341371328

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: 399c51d6ed22fb0c"
        threat_level = "medium"
        first_seen = "2025-10-05"
    condition:
        hash.sha256(0, filesize) == "399c51d6ed22fb0c649d5a148aaef55eee07060251dde6ed045c188d2f4c8b4a"
}

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 399c51d6ed22fb0c649d5a148aaef55eee07060251dde6ed045c188d2f4c8b4a # MD5 cee23114ee0a49913578af4341371328
TypeValueNote
sha256 399c51d6ed22fb0c649d5a148aaef55eee07060251dde6ed045c188d2f4c8b4a Sample:MassLogger
md5 cee23114ee0a49913578af4341371328 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi