MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2565d02937446d2031b8d6f28d4dab29da62a1358864bca30cb1ebb3355478d3140
MD56ef40e3c2b94020f46e2b0a9a5cf6bad
File Typeexe
Size2394.5 KB
First Seen2025-10-20
File Nameutil.dll
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: 5d02937446d2031b8d6f28d4dab29da62a1358864bca30cb1ebb3355478d3140
  • MD5: 6ef40e3c2b94020f46e2b0a9a5cf6bad

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: 5d02937446d2031b"
        threat_level = "medium"
        first_seen = "2025-10-20"
    condition:
        hash.sha256(0, filesize) == "5d02937446d2031b8d6f28d4dab29da62a1358864bca30cb1ebb3355478d3140"
}

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 5d02937446d2031b8d6f28d4dab29da62a1358864bca30cb1ebb3355478d3140 # MD5 6ef40e3c2b94020f46e2b0a9a5cf6bad
TypeValueNote
sha256 5d02937446d2031b8d6f28d4dab29da62a1358864bca30cb1ebb3355478d3140 Sample:MassLogger
md5 6ef40e3c2b94020f46e2b0a9a5cf6bad Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi