MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256a2f57d0e79f8f06c984be2aac660569eedcb8fa3eff303bbe6baa42f6eeacd54
MD537bb173060bc1ef43f8b9e94f09a9676
File Typexlsx
Size2353.3 KB
First Seen2025-09-04
File NamePayment Advice.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: a2f57d0e79f8f06c984be2aac660569eedcb8fa3eff303bbe6baa42f6eeacd54
  • MD5: 37bb173060bc1ef43f8b9e94f09a9676

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: a2f57d0e79f8f06c"
        threat_level = "medium"
        first_seen = "2025-09-04"
    condition:
        hash.sha256(0, filesize) == "a2f57d0e79f8f06c984be2aac660569eedcb8fa3eff303bbe6baa42f6eeacd54"
}

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 a2f57d0e79f8f06c984be2aac660569eedcb8fa3eff303bbe6baa42f6eeacd54 # MD5 37bb173060bc1ef43f8b9e94f09a9676
TypeValueNote
sha256 a2f57d0e79f8f06c984be2aac660569eedcb8fa3eff303bbe6baa42f6eeacd54 Sample:MassLogger
md5 37bb173060bc1ef43f8b9e94f09a9676 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi