MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25635789622f4b1e9cb6638acba0fa26ca51e517f34bbac5dc876e3587392dcb6bb
MD5d5ab341c0bd54f632cf922e6b7b9898d
File Typeexe
Size814.5 KB
First Seen2025-08-27
File NameSecuriteInfo.com.Win32.MalwareX-gen.22939896
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: 35789622f4b1e9cb6638acba0fa26ca51e517f34bbac5dc876e3587392dcb6bb
  • MD5: d5ab341c0bd54f632cf922e6b7b9898d

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: 35789622f4b1e9cb"
        threat_level = "medium"
        first_seen = "2025-08-27"
    condition:
        hash.sha256(0, filesize) == "35789622f4b1e9cb6638acba0fa26ca51e517f34bbac5dc876e3587392dcb6bb"
}

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 35789622f4b1e9cb6638acba0fa26ca51e517f34bbac5dc876e3587392dcb6bb # MD5 d5ab341c0bd54f632cf922e6b7b9898d
TypeValueNote
sha256 35789622f4b1e9cb6638acba0fa26ca51e517f34bbac5dc876e3587392dcb6bb Sample:MassLogger
md5 d5ab341c0bd54f632cf922e6b7b9898d Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi