MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25671accf4dd04974bbfa1cdc13495cf85e36add8b61716c82dd1f70cc6f6fa255c
MD502551a4e78c7a8edb23c02902a5d963a
File Typeexe
Size475.0 KB
First Seen2025-08-11
File NameTeklif Talebi-İhale No 14990.pif
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: 71accf4dd04974bbfa1cdc13495cf85e36add8b61716c82dd1f70cc6f6fa255c
  • MD5: 02551a4e78c7a8edb23c02902a5d963a

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: 71accf4dd04974bb"
        threat_level = "medium"
        first_seen = "2025-08-11"
    condition:
        hash.sha256(0, filesize) == "71accf4dd04974bbfa1cdc13495cf85e36add8b61716c82dd1f70cc6f6fa255c"
}

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 71accf4dd04974bbfa1cdc13495cf85e36add8b61716c82dd1f70cc6f6fa255c # MD5 02551a4e78c7a8edb23c02902a5d963a
TypeValueNote
sha256 71accf4dd04974bbfa1cdc13495cf85e36add8b61716c82dd1f70cc6f6fa255c Sample:MassLogger
md5 02551a4e78c7a8edb23c02902a5d963a Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi