MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256dce659de9fd37d5bb82dd72548c0cc74f2498c740013e2cc5573b1b5be47758b
MD573a0baf0ac5433366072579e7924cf3f
File Typeexe
Size888.5 KB
First Seen2025-08-07
File Name23601 Nolu Talebimiz-TEKLİF İSTEĞİ_xlsx.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: dce659de9fd37d5bb82dd72548c0cc74f2498c740013e2cc5573b1b5be47758b
  • MD5: 73a0baf0ac5433366072579e7924cf3f

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: dce659de9fd37d5b"
        threat_level = "medium"
        first_seen = "2025-08-07"
    condition:
        hash.sha256(0, filesize) == "dce659de9fd37d5bb82dd72548c0cc74f2498c740013e2cc5573b1b5be47758b"
}

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 dce659de9fd37d5bb82dd72548c0cc74f2498c740013e2cc5573b1b5be47758b # MD5 73a0baf0ac5433366072579e7924cf3f
TypeValueNote
sha256 dce659de9fd37d5bb82dd72548c0cc74f2498c740013e2cc5573b1b5be47758b Sample:MassLogger
md5 73a0baf0ac5433366072579e7924cf3f Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi