MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256a25d58a2f18d64bff7005f5d5a656eb2280ebcdab1c52ee71707c5d696050fe3
MD5bbe86316fea9468a938f5b66c460a4aa
File Typejs
Size202.3 KB
First Seen2025-06-18
File NameSOA SAFETY & FIRE EQUIPMENT.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: a25d58a2f18d64bff7005f5d5a656eb2280ebcdab1c52ee71707c5d696050fe3
  • MD5: bbe86316fea9468a938f5b66c460a4aa

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: a25d58a2f18d64bf"
        threat_level = "medium"
        first_seen = "2025-06-18"
    condition:
        hash.sha256(0, filesize) == "a25d58a2f18d64bff7005f5d5a656eb2280ebcdab1c52ee71707c5d696050fe3"
}

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 a25d58a2f18d64bff7005f5d5a656eb2280ebcdab1c52ee71707c5d696050fe3 # MD5 bbe86316fea9468a938f5b66c460a4aa
TypeValueNote
sha256 a25d58a2f18d64bff7005f5d5a656eb2280ebcdab1c52ee71707c5d696050fe3 Sample:MassLogger
md5 bbe86316fea9468a938f5b66c460a4aa Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi