MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25683a7f2170b05d2e8dc07557a199c34edb7a1ae451959b08b74e2006b99858875
MD576caef4f07080313bc241af0c1bf6021
File Typevbe
Size1273.0 KB
First Seen2025-12-04
File NameN° CF 22100103-2025.pdf.vbe
TagsMassLogger, vbe

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: 83a7f2170b05d2e8dc07557a199c34edb7a1ae451959b08b74e2006b99858875
  • MD5: 76caef4f07080313bc241af0c1bf6021

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: 83a7f2170b05d2e8"
        threat_level = "medium"
        first_seen = "2025-12-04"
    condition:
        hash.sha256(0, filesize) == "83a7f2170b05d2e8dc07557a199c34edb7a1ae451959b08b74e2006b99858875"
}

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 83a7f2170b05d2e8dc07557a199c34edb7a1ae451959b08b74e2006b99858875 # MD5 76caef4f07080313bc241af0c1bf6021
TypeValueNote
sha256 83a7f2170b05d2e8dc07557a199c34edb7a1ae451959b08b74e2006b99858875 Sample:MassLogger
md5 76caef4f07080313bc241af0c1bf6021 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi