MassLogger | Threat Level: medium | Type: Infostealer
Cryptographic Identifiers
| SHA256 | 03c5e69e23780d3e10b07c8cc1d0c70211a7a159430c5ea8fe31b881cc26f8a7 |
|---|---|
| MD5 | 778460bd6021b2ec09077261f55add89 |
| File Type | js |
| Size | 1527.7 KB |
| First Seen | 2026-04-28 |
| File Name | FR240132-1-MRSB-VALVE-0006.js |
| Tags | js, MassLogger |
Malware Family: MassLogger
MassLogger, email tabanlı keylogger'dır.
| Type | Infostealer |
|---|---|
| Programming Language | C#/.NET |
| Target Platform | Windows |
| C2 Protocol | SMTP/FTP |
| Purpose | Email keylogger |
| First Seen Year | 2020 |
Threat Indicators (IOC)
- SHA256:
03c5e69e23780d3e10b07c8cc1d0c70211a7a159430c5ea8fe31b881cc26f8a7 - MD5:
778460bd6021b2ec09077261f55add89
You can verify all hash values of this sample on VirusTotal.
System Cleanup Guide
- Disconnect the system from the network immediately
- Yeni bir cihazdan banka hesabı, sosyal medya ve e-posta şifrelerini değiştirin
- Move crypto wallets to a new address and abandon the old ones
- Start a full scan with up-to-date antivirus
- Clear saved browser passwords and enable 2FA
- Sign out of all sessions on every affected service
YARA Rule Hints
rule MassLogger_SHA256 {
meta:
description = "MassLogger sample: 03c5e69e23780d3e"
threat_level = "medium"
first_seen = "2026-04-28"
condition:
hash.sha256(0, filesize) == "03c5e69e23780d3e10b07c8cc1d0c70211a7a159430c5ea8fe31b881cc26f8a7"
}
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
03c5e69e23780d3e10b07c8cc1d0c70211a7a159430c5ea8fe31b881cc26f8a7
# MD5
778460bd6021b2ec09077261f55add89
| Type | Value | Note |
|---|---|---|
| sha256 | 03c5e69e23780d3e10b07c8cc1d0c70211a7a159430c5ea8fe31b881cc26f8a7 | Sample:MassLogger |
| md5 | 778460bd6021b2ec09077261f55add89 | Sample:MassLogger |