MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b9cc5c028d00a8ecc7a1c0fcb34d4a2ec87959f479a2a306e9babba12f2704c3
MD5cdf8dee3153d294ba453de9c2ecb553d
File Typeexe
Size255.5 KB
First Seen2026-03-06
File Nameb9cc5c028d00a8ecc7a1c0fcb34d4a2ec87959f479a2a306e9babba12f2704c3
Tagsbot8257734127, exe, 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: b9cc5c028d00a8ecc7a1c0fcb34d4a2ec87959f479a2a306e9babba12f2704c3
  • MD5: cdf8dee3153d294ba453de9c2ecb553d

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: b9cc5c028d00a8ec"
        threat_level = "medium"
        first_seen = "2026-03-06"
    condition:
        hash.sha256(0, filesize) == "b9cc5c028d00a8ecc7a1c0fcb34d4a2ec87959f479a2a306e9babba12f2704c3"
}

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 b9cc5c028d00a8ecc7a1c0fcb34d4a2ec87959f479a2a306e9babba12f2704c3 # MD5 cdf8dee3153d294ba453de9c2ecb553d
TypeValueNote
sha256 b9cc5c028d00a8ecc7a1c0fcb34d4a2ec87959f479a2a306e9babba12f2704c3 Sample:MassLogger
md5 cdf8dee3153d294ba453de9c2ecb553d Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi