MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b5906e2072c688724dc03b7f5c7e3c6733ed8feea351366604af8d2d54238057
MD5580cb60d5502e16ebffcd9b1331547df
File Typexlsx
Size3312.9 KB
First Seen2026-01-15
File NameRFQ-OQ#1895365.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: b5906e2072c688724dc03b7f5c7e3c6733ed8feea351366604af8d2d54238057
  • MD5: 580cb60d5502e16ebffcd9b1331547df

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: b5906e2072c68872"
        threat_level = "medium"
        first_seen = "2026-01-15"
    condition:
        hash.sha256(0, filesize) == "b5906e2072c688724dc03b7f5c7e3c6733ed8feea351366604af8d2d54238057"
}

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 b5906e2072c688724dc03b7f5c7e3c6733ed8feea351366604af8d2d54238057 # MD5 580cb60d5502e16ebffcd9b1331547df
TypeValueNote
sha256 b5906e2072c688724dc03b7f5c7e3c6733ed8feea351366604af8d2d54238057 Sample:MassLogger
md5 580cb60d5502e16ebffcd9b1331547df Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi