MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256e4a7f4d17ae4f392713b90b301313b2976b9926d6d2784ce02079aa04ccd8bd0
MD5a435fa1de1c84c81d5b29d1fa002c37f
File Typexlsx
Size2246.4 KB
First Seen2025-09-03
File NameNew Order RFQ HU2500357.xlam
TagsCVE-2018-0798, 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: e4a7f4d17ae4f392713b90b301313b2976b9926d6d2784ce02079aa04ccd8bd0
  • MD5: a435fa1de1c84c81d5b29d1fa002c37f

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: e4a7f4d17ae4f392"
        threat_level = "medium"
        first_seen = "2025-09-03"
    condition:
        hash.sha256(0, filesize) == "e4a7f4d17ae4f392713b90b301313b2976b9926d6d2784ce02079aa04ccd8bd0"
}

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 e4a7f4d17ae4f392713b90b301313b2976b9926d6d2784ce02079aa04ccd8bd0 # MD5 a435fa1de1c84c81d5b29d1fa002c37f
TypeValueNote
sha256 e4a7f4d17ae4f392713b90b301313b2976b9926d6d2784ce02079aa04ccd8bd0 Sample:MassLogger
md5 a435fa1de1c84c81d5b29d1fa002c37f Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi