MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2567cc24ced6110feee0ecafa9be60597697fe704bd77fe4b029f1ed8e0a1f10d31
MD58b9fc4b117993fb07409c612ef45d179
File Typexlsx
Size2279.7 KB
First Seen2025-09-04
File Name(P.O_S6302651)_ZUOYUAN.xlam
TagsCVE-2017-11882, MassLogger, xlam, xlsx

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: 7cc24ced6110feee0ecafa9be60597697fe704bd77fe4b029f1ed8e0a1f10d31
  • MD5: 8b9fc4b117993fb07409c612ef45d179

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: 7cc24ced6110feee"
        threat_level = "medium"
        first_seen = "2025-09-04"
    condition:
        hash.sha256(0, filesize) == "7cc24ced6110feee0ecafa9be60597697fe704bd77fe4b029f1ed8e0a1f10d31"
}

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 7cc24ced6110feee0ecafa9be60597697fe704bd77fe4b029f1ed8e0a1f10d31 # MD5 8b9fc4b117993fb07409c612ef45d179
TypeValueNote
sha256 7cc24ced6110feee0ecafa9be60597697fe704bd77fe4b029f1ed8e0a1f10d31 Sample:MassLogger
md5 8b9fc4b117993fb07409c612ef45d179 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi