MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2565110852635a1cf69f86a65e4989b65c0db652a23c16dc9169d37d9bc2e8f4e3c
MD539c540d4447e09d9a48cf5d35a4d05a8
File Typeexe
Size591.0 KB
First Seen2025-06-10
File Name5110852635a1cf69f86a65e4989b65c0db652a23c16dc9169d37d9bc2e8f4e3c
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: 5110852635a1cf69f86a65e4989b65c0db652a23c16dc9169d37d9bc2e8f4e3c
  • MD5: 39c540d4447e09d9a48cf5d35a4d05a8

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: 5110852635a1cf69"
        threat_level = "medium"
        first_seen = "2025-06-10"
    condition:
        hash.sha256(0, filesize) == "5110852635a1cf69f86a65e4989b65c0db652a23c16dc9169d37d9bc2e8f4e3c"
}

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 5110852635a1cf69f86a65e4989b65c0db652a23c16dc9169d37d9bc2e8f4e3c # MD5 39c540d4447e09d9a48cf5d35a4d05a8
TypeValueNote
sha256 5110852635a1cf69f86a65e4989b65c0db652a23c16dc9169d37d9bc2e8f4e3c Sample:MassLogger
md5 39c540d4447e09d9a48cf5d35a4d05a8 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi