MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2561bd738b4912e377d7c2e08b2a907e9e81dce561b21049e0eb70f639e2c41c1e3
MD5024ee0d64bcc4f915117c409cfafabf9
File Typeexe
Size1042.0 KB
First Seen2025-06-24
File Name(BBVA) Mensaje SWIFT-PDF.exe
TagsBBVA, exe, 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: 1bd738b4912e377d7c2e08b2a907e9e81dce561b21049e0eb70f639e2c41c1e3
  • MD5: 024ee0d64bcc4f915117c409cfafabf9

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: 1bd738b4912e377d"
        threat_level = "medium"
        first_seen = "2025-06-24"
    condition:
        hash.sha256(0, filesize) == "1bd738b4912e377d7c2e08b2a907e9e81dce561b21049e0eb70f639e2c41c1e3"
}

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 1bd738b4912e377d7c2e08b2a907e9e81dce561b21049e0eb70f639e2c41c1e3 # MD5 024ee0d64bcc4f915117c409cfafabf9
TypeValueNote
sha256 1bd738b4912e377d7c2e08b2a907e9e81dce561b21049e0eb70f639e2c41c1e3 Sample:MassLogger
md5 024ee0d64bcc4f915117c409cfafabf9 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi