MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256131e7a58c7eef929455150072f714c30c3136b950297f6d8dffa6189499d8a73
MD5f917bb7f564bdd8876f20562699bea05
File Typeexe
Size1055.5 KB
First Seen2025-06-10
File Name131e7a58c7eef929455150072f714c30c3136b950297f6d8dffa6189499d8a73
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: 131e7a58c7eef929455150072f714c30c3136b950297f6d8dffa6189499d8a73
  • MD5: f917bb7f564bdd8876f20562699bea05

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: 131e7a58c7eef929"
        threat_level = "medium"
        first_seen = "2025-06-10"
    condition:
        hash.sha256(0, filesize) == "131e7a58c7eef929455150072f714c30c3136b950297f6d8dffa6189499d8a73"
}

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 131e7a58c7eef929455150072f714c30c3136b950297f6d8dffa6189499d8a73 # MD5 f917bb7f564bdd8876f20562699bea05
TypeValueNote
sha256 131e7a58c7eef929455150072f714c30c3136b950297f6d8dffa6189499d8a73 Sample:MassLogger
md5 f917bb7f564bdd8876f20562699bea05 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi