MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25635cd26db3de4420e0442ef5cf452e7f52519f98f3d3f7d168fb235bda1d8548b
MD5aee49c76812ae17342fa187fd1a6f639
File Typeexe
Size605.5 KB
First Seen2025-09-05
File Name35cd26db3de4420e0442ef5cf452e7f52519f98f3d3f7d168fb235bda1d8548b
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: 35cd26db3de4420e0442ef5cf452e7f52519f98f3d3f7d168fb235bda1d8548b
  • MD5: aee49c76812ae17342fa187fd1a6f639

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: 35cd26db3de4420e"
        threat_level = "medium"
        first_seen = "2025-09-05"
    condition:
        hash.sha256(0, filesize) == "35cd26db3de4420e0442ef5cf452e7f52519f98f3d3f7d168fb235bda1d8548b"
}

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 35cd26db3de4420e0442ef5cf452e7f52519f98f3d3f7d168fb235bda1d8548b # MD5 aee49c76812ae17342fa187fd1a6f639
TypeValueNote
sha256 35cd26db3de4420e0442ef5cf452e7f52519f98f3d3f7d168fb235bda1d8548b Sample:MassLogger
md5 aee49c76812ae17342fa187fd1a6f639 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi