MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25644034ae3b81fc438e170aac45feea5e6237e7864f1783bf2aa17c92545dce6b9
MD51a67f4d186d22edf05b704ee5337ee1b
File Typeexe
Size1039.5 KB
First Seen2025-07-02
File NamePurchase Order (PO25-260285).exe
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: 44034ae3b81fc438e170aac45feea5e6237e7864f1783bf2aa17c92545dce6b9
  • MD5: 1a67f4d186d22edf05b704ee5337ee1b

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: 44034ae3b81fc438"
        threat_level = "medium"
        first_seen = "2025-07-02"
    condition:
        hash.sha256(0, filesize) == "44034ae3b81fc438e170aac45feea5e6237e7864f1783bf2aa17c92545dce6b9"
}

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 44034ae3b81fc438e170aac45feea5e6237e7864f1783bf2aa17c92545dce6b9 # MD5 1a67f4d186d22edf05b704ee5337ee1b
TypeValueNote
sha256 44034ae3b81fc438e170aac45feea5e6237e7864f1783bf2aa17c92545dce6b9 Sample:MassLogger
md5 1a67f4d186d22edf05b704ee5337ee1b Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi