MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25640127b2fdcc16c20181a5f49ab120cdf7648f3526e8b99264a66e7ae419531cd
MD51ef6fe0764ae60c3186565cfd4210e1a
File Typejs
Size3.7 KB
First Seen2025-07-08
File NameVanto Energy Order PO-B2843.js
Tagsjs, 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: 40127b2fdcc16c20181a5f49ab120cdf7648f3526e8b99264a66e7ae419531cd
  • MD5: 1ef6fe0764ae60c3186565cfd4210e1a

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: 40127b2fdcc16c20"
        threat_level = "medium"
        first_seen = "2025-07-08"
    condition:
        hash.sha256(0, filesize) == "40127b2fdcc16c20181a5f49ab120cdf7648f3526e8b99264a66e7ae419531cd"
}

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 40127b2fdcc16c20181a5f49ab120cdf7648f3526e8b99264a66e7ae419531cd # MD5 1ef6fe0764ae60c3186565cfd4210e1a
TypeValueNote
sha256 40127b2fdcc16c20181a5f49ab120cdf7648f3526e8b99264a66e7ae419531cd Sample:MassLogger
md5 1ef6fe0764ae60c3186565cfd4210e1a Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi