MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256531a8af20bc409ee275744a79dc4c981ffce7549f4f47e7519eb3eb1f0d469b2
MD572b0b20bc7a4785ff792e86b91909ba4
File Typeexe
Size1174.0 KB
First Seen2025-07-10
File NamePRE ALERT HBL#STGSE25060068 250703557.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: 531a8af20bc409ee275744a79dc4c981ffce7549f4f47e7519eb3eb1f0d469b2
  • MD5: 72b0b20bc7a4785ff792e86b91909ba4

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: 531a8af20bc409ee"
        threat_level = "medium"
        first_seen = "2025-07-10"
    condition:
        hash.sha256(0, filesize) == "531a8af20bc409ee275744a79dc4c981ffce7549f4f47e7519eb3eb1f0d469b2"
}

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 531a8af20bc409ee275744a79dc4c981ffce7549f4f47e7519eb3eb1f0d469b2 # MD5 72b0b20bc7a4785ff792e86b91909ba4
TypeValueNote
sha256 531a8af20bc409ee275744a79dc4c981ffce7549f4f47e7519eb3eb1f0d469b2 Sample:MassLogger
md5 72b0b20bc7a4785ff792e86b91909ba4 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi