MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2567c4421fa3dc87a87f9ea4141aee3da21374a7b0aa029bdcd49c6b656ec74087d
MD5a75c4ce4f1e6bea19a6237d0f7db1ff3
File Typeexe
Size963.0 KB
First Seen2025-06-06
File Name7c4421fa3dc87a87f9ea4141aee3da21374a7b0aa029bdcd49c6b656ec74087d
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: 7c4421fa3dc87a87f9ea4141aee3da21374a7b0aa029bdcd49c6b656ec74087d
  • MD5: a75c4ce4f1e6bea19a6237d0f7db1ff3

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: 7c4421fa3dc87a87"
        threat_level = "medium"
        first_seen = "2025-06-06"
    condition:
        hash.sha256(0, filesize) == "7c4421fa3dc87a87f9ea4141aee3da21374a7b0aa029bdcd49c6b656ec74087d"
}

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 7c4421fa3dc87a87f9ea4141aee3da21374a7b0aa029bdcd49c6b656ec74087d # MD5 a75c4ce4f1e6bea19a6237d0f7db1ff3
TypeValueNote
sha256 7c4421fa3dc87a87f9ea4141aee3da21374a7b0aa029bdcd49c6b656ec74087d Sample:MassLogger
md5 a75c4ce4f1e6bea19a6237d0f7db1ff3 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi