MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256fd4057193b98a07e3c09cc97e3ee64720aa75c86d4d3f19575d9ff3b8958ee25
MD5e98e39deca3d6a99dbecee065ea4a7d6
File Typezip
Size563.9 KB
First Seen2025-06-17
File Nameswift copy.zip
TagsMassLogger, payment, Shipping, SWIFT, zip

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: fd4057193b98a07e3c09cc97e3ee64720aa75c86d4d3f19575d9ff3b8958ee25
  • MD5: e98e39deca3d6a99dbecee065ea4a7d6

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: fd4057193b98a07e"
        threat_level = "medium"
        first_seen = "2025-06-17"
    condition:
        hash.sha256(0, filesize) == "fd4057193b98a07e3c09cc97e3ee64720aa75c86d4d3f19575d9ff3b8958ee25"
}

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 fd4057193b98a07e3c09cc97e3ee64720aa75c86d4d3f19575d9ff3b8958ee25 # MD5 e98e39deca3d6a99dbecee065ea4a7d6
TypeValueNote
sha256 fd4057193b98a07e3c09cc97e3ee64720aa75c86d4d3f19575d9ff3b8958ee25 Sample:MassLogger
md5 e98e39deca3d6a99dbecee065ea4a7d6 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi