MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b55e1d97cb0f73d37af6472d1f7722018ddb8bd9ea1e5d920da9c80964663e13
MD5d08210ebbcd8a85c42eb3c40c5a0e40d
File Typeexe
Size554.5 KB
First Seen2025-10-10
File Nameb55e1d97cb0f73d37af6472d1f7722018ddb8bd9ea1e5d920da9c80964663e13
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: b55e1d97cb0f73d37af6472d1f7722018ddb8bd9ea1e5d920da9c80964663e13
  • MD5: d08210ebbcd8a85c42eb3c40c5a0e40d

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: b55e1d97cb0f73d3"
        threat_level = "medium"
        first_seen = "2025-10-10"
    condition:
        hash.sha256(0, filesize) == "b55e1d97cb0f73d37af6472d1f7722018ddb8bd9ea1e5d920da9c80964663e13"
}

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 b55e1d97cb0f73d37af6472d1f7722018ddb8bd9ea1e5d920da9c80964663e13 # MD5 d08210ebbcd8a85c42eb3c40c5a0e40d
TypeValueNote
sha256 b55e1d97cb0f73d37af6472d1f7722018ddb8bd9ea1e5d920da9c80964663e13 Sample:MassLogger
md5 d08210ebbcd8a85c42eb3c40c5a0e40d Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi