MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25605bf0c682c0ec36177054450a74f375dadf25729cd82585ea81a128fa4d5d51d
MD5b502d6a519f4f2145826be4af918e8df
File Typejs
Size51.5 KB
First Seen2026-01-30
File NameFILE. [HDEC] RFQ_VIET EPC12 & EPC13 Project.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: 05bf0c682c0ec36177054450a74f375dadf25729cd82585ea81a128fa4d5d51d
  • MD5: b502d6a519f4f2145826be4af918e8df

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: 05bf0c682c0ec361"
        threat_level = "medium"
        first_seen = "2026-01-30"
    condition:
        hash.sha256(0, filesize) == "05bf0c682c0ec36177054450a74f375dadf25729cd82585ea81a128fa4d5d51d"
}

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 05bf0c682c0ec36177054450a74f375dadf25729cd82585ea81a128fa4d5d51d # MD5 b502d6a519f4f2145826be4af918e8df
TypeValueNote
sha256 05bf0c682c0ec36177054450a74f375dadf25729cd82585ea81a128fa4d5d51d Sample:MassLogger
md5 b502d6a519f4f2145826be4af918e8df Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi