MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b3a7598bd3c68204338a740bf3b5d3d785c1240a37239b384acea401f5bd0b1d
MD56f806848478841869197a25500a40211
File Typetar
Size113.0 KB
First Seen2025-06-17
File NamenRemittance_copy.tar
TagsMassLogger, tar

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: b3a7598bd3c68204338a740bf3b5d3d785c1240a37239b384acea401f5bd0b1d
  • MD5: 6f806848478841869197a25500a40211

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: b3a7598bd3c68204"
        threat_level = "medium"
        first_seen = "2025-06-17"
    condition:
        hash.sha256(0, filesize) == "b3a7598bd3c68204338a740bf3b5d3d785c1240a37239b384acea401f5bd0b1d"
}

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 b3a7598bd3c68204338a740bf3b5d3d785c1240a37239b384acea401f5bd0b1d # MD5 6f806848478841869197a25500a40211
TypeValueNote
sha256 b3a7598bd3c68204338a740bf3b5d3d785c1240a37239b384acea401f5bd0b1d Sample:MassLogger
md5 6f806848478841869197a25500a40211 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi