MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256ca1d58e35c31bd800519adc8167d1485b6b4d0ec2d0fe4123a4ec9d5b4e5fc4c
MD5bc9d5eb533562bbe46f221b92759d592
File Typeexe
Size751.0 KB
First Seen2025-12-08
File Nameca1d58e35c31bd800519adc8167d1485b6b4d0ec2d0fe4123a4ec9d5b4e5fc4c
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: ca1d58e35c31bd800519adc8167d1485b6b4d0ec2d0fe4123a4ec9d5b4e5fc4c
  • MD5: bc9d5eb533562bbe46f221b92759d592

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: ca1d58e35c31bd80"
        threat_level = "medium"
        first_seen = "2025-12-08"
    condition:
        hash.sha256(0, filesize) == "ca1d58e35c31bd800519adc8167d1485b6b4d0ec2d0fe4123a4ec9d5b4e5fc4c"
}

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 ca1d58e35c31bd800519adc8167d1485b6b4d0ec2d0fe4123a4ec9d5b4e5fc4c # MD5 bc9d5eb533562bbe46f221b92759d592
TypeValueNote
sha256 ca1d58e35c31bd800519adc8167d1485b6b4d0ec2d0fe4123a4ec9d5b4e5fc4c Sample:MassLogger
md5 bc9d5eb533562bbe46f221b92759d592 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi