MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25620ec2e1a14f554ef4e52ef34ab36a2f3265ba46f84fb054b16b5e3014027f87e
MD5c4eec4e47655ef213fc52eff0558745c
File Typeexe
Size1052.5 KB
First Seen2025-06-12
File Namepayment advice.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: 20ec2e1a14f554ef4e52ef34ab36a2f3265ba46f84fb054b16b5e3014027f87e
  • MD5: c4eec4e47655ef213fc52eff0558745c

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: 20ec2e1a14f554ef"
        threat_level = "medium"
        first_seen = "2025-06-12"
    condition:
        hash.sha256(0, filesize) == "20ec2e1a14f554ef4e52ef34ab36a2f3265ba46f84fb054b16b5e3014027f87e"
}

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 20ec2e1a14f554ef4e52ef34ab36a2f3265ba46f84fb054b16b5e3014027f87e # MD5 c4eec4e47655ef213fc52eff0558745c
TypeValueNote
sha256 20ec2e1a14f554ef4e52ef34ab36a2f3265ba46f84fb054b16b5e3014027f87e Sample:MassLogger
md5 c4eec4e47655ef213fc52eff0558745c Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi