MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256799bbb48a1f3d7822992b3d7d6388e0ee2b3d6c358ad7587d10e63a5d1cc6f72
MD57954fa9c74229a1e15d6849c2ff97a68
File Typeexe
Size1041.0 KB
First Seen2025-06-16
File NameSATIN ALMA SİPARİŞİ-SUMITOMO RUBBER AKO LASTIK SAN ve TIC AS_docx.exe
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: 799bbb48a1f3d7822992b3d7d6388e0ee2b3d6c358ad7587d10e63a5d1cc6f72
  • MD5: 7954fa9c74229a1e15d6849c2ff97a68

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: 799bbb48a1f3d782"
        threat_level = "medium"
        first_seen = "2025-06-16"
    condition:
        hash.sha256(0, filesize) == "799bbb48a1f3d7822992b3d7d6388e0ee2b3d6c358ad7587d10e63a5d1cc6f72"
}

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 799bbb48a1f3d7822992b3d7d6388e0ee2b3d6c358ad7587d10e63a5d1cc6f72 # MD5 7954fa9c74229a1e15d6849c2ff97a68
TypeValueNote
sha256 799bbb48a1f3d7822992b3d7d6388e0ee2b3d6c358ad7587d10e63a5d1cc6f72 Sample:MassLogger
md5 7954fa9c74229a1e15d6849c2ff97a68 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi