MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256fa4036ae09207d287c5f19e218825ffa26b8a3e3f1a1b07435cab97efbac0feb
MD58b0bd1b2fed0bd492236a09be29d35eb
File Typeexe
Size693.0 KB
First Seen2025-10-02
File NamePI.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: fa4036ae09207d287c5f19e218825ffa26b8a3e3f1a1b07435cab97efbac0feb
  • MD5: 8b0bd1b2fed0bd492236a09be29d35eb

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: fa4036ae09207d28"
        threat_level = "medium"
        first_seen = "2025-10-02"
    condition:
        hash.sha256(0, filesize) == "fa4036ae09207d287c5f19e218825ffa26b8a3e3f1a1b07435cab97efbac0feb"
}

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 fa4036ae09207d287c5f19e218825ffa26b8a3e3f1a1b07435cab97efbac0feb # MD5 8b0bd1b2fed0bd492236a09be29d35eb
TypeValueNote
sha256 fa4036ae09207d287c5f19e218825ffa26b8a3e3f1a1b07435cab97efbac0feb Sample:MassLogger
md5 8b0bd1b2fed0bd492236a09be29d35eb Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi