MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b6a881a0a41a520f994dfd3cdd8aad7362df255a57d51ce5954d060319cfc179
MD51b3bf56a2f51d2d0f97bc79a1b062544
File Typeexe
Size933.0 KB
First Seen2025-06-10
File Nameb6a881a0a41a520f994dfd3cdd8aad7362df255a57d51ce5954d060319cfc179
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: b6a881a0a41a520f994dfd3cdd8aad7362df255a57d51ce5954d060319cfc179
  • MD5: 1b3bf56a2f51d2d0f97bc79a1b062544

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: b6a881a0a41a520f"
        threat_level = "medium"
        first_seen = "2025-06-10"
    condition:
        hash.sha256(0, filesize) == "b6a881a0a41a520f994dfd3cdd8aad7362df255a57d51ce5954d060319cfc179"
}

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 b6a881a0a41a520f994dfd3cdd8aad7362df255a57d51ce5954d060319cfc179 # MD5 1b3bf56a2f51d2d0f97bc79a1b062544
TypeValueNote
sha256 b6a881a0a41a520f994dfd3cdd8aad7362df255a57d51ce5954d060319cfc179 Sample:MassLogger
md5 1b3bf56a2f51d2d0f97bc79a1b062544 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi