MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256d8f84c5d5d307bf8a54887b9f80de352dbe84880987aec5c2923c0e301a916e2
MD58cd730cde2d6fd5f7ab7d4a7551c2480
File Typeexe
Size481.5 KB
First Seen2025-09-05
File Named8f84c5d5d307bf8a54887b9f80de352dbe84880987aec5c2923c0e301a916e2
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: d8f84c5d5d307bf8a54887b9f80de352dbe84880987aec5c2923c0e301a916e2
  • MD5: 8cd730cde2d6fd5f7ab7d4a7551c2480

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: d8f84c5d5d307bf8"
        threat_level = "medium"
        first_seen = "2025-09-05"
    condition:
        hash.sha256(0, filesize) == "d8f84c5d5d307bf8a54887b9f80de352dbe84880987aec5c2923c0e301a916e2"
}

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 d8f84c5d5d307bf8a54887b9f80de352dbe84880987aec5c2923c0e301a916e2 # MD5 8cd730cde2d6fd5f7ab7d4a7551c2480
TypeValueNote
sha256 d8f84c5d5d307bf8a54887b9f80de352dbe84880987aec5c2923c0e301a916e2 Sample:MassLogger
md5 8cd730cde2d6fd5f7ab7d4a7551c2480 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi