MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2564793b5ad77a25a94754ff54ff8aea511b1fe6e23bb24a00b550af0e5979ac9d1
MD51ea1a92a8d0a79b48c1c1c7f27239b69
File Typetar
Size610.5 KB
First Seen2025-06-21
File NamePurchase Order.tar
TagsMassLogger, Spam-ITA, tar

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: 4793b5ad77a25a94754ff54ff8aea511b1fe6e23bb24a00b550af0e5979ac9d1
  • MD5: 1ea1a92a8d0a79b48c1c1c7f27239b69

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: 4793b5ad77a25a94"
        threat_level = "medium"
        first_seen = "2025-06-21"
    condition:
        hash.sha256(0, filesize) == "4793b5ad77a25a94754ff54ff8aea511b1fe6e23bb24a00b550af0e5979ac9d1"
}

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 4793b5ad77a25a94754ff54ff8aea511b1fe6e23bb24a00b550af0e5979ac9d1 # MD5 1ea1a92a8d0a79b48c1c1c7f27239b69
TypeValueNote
sha256 4793b5ad77a25a94754ff54ff8aea511b1fe6e23bb24a00b550af0e5979ac9d1 Sample:MassLogger
md5 1ea1a92a8d0a79b48c1c1c7f27239b69 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi