MassLogger | Threat Level: medium | Type: Infostealer
Cryptographic Identifiers
| SHA256 | 4903fbe3e8ee4bc49035c9fb6e8fd3d258f3daadf237d6b1f8dd3fe41cb4ced9 |
|---|---|
| MD5 | b11c3ec5c3429224d8ddfcaecbd107b0 |
| File Type | msi |
| Size | 68.0 KB |
| First Seen | 2026-05-30 |
| File Name | RFQ-CS-2026-1340-PR-1009380228-MQ.msi |
| Tags | exe-in-archive, MassLogger, msi, spamtrap |
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:
4903fbe3e8ee4bc49035c9fb6e8fd3d258f3daadf237d6b1f8dd3fe41cb4ced9 - MD5:
b11c3ec5c3429224d8ddfcaecbd107b0
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: 4903fbe3e8ee4bc4"
threat_level = "medium"
first_seen = "2026-05-30"
condition:
hash.sha256(0, filesize) == "4903fbe3e8ee4bc49035c9fb6e8fd3d258f3daadf237d6b1f8dd3fe41cb4ced9"
}
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
4903fbe3e8ee4bc49035c9fb6e8fd3d258f3daadf237d6b1f8dd3fe41cb4ced9
# MD5
b11c3ec5c3429224d8ddfcaecbd107b0
| Type | Value | Note |
|---|---|---|
| sha256 | 4903fbe3e8ee4bc49035c9fb6e8fd3d258f3daadf237d6b1f8dd3fe41cb4ced9 | Sample:MassLogger |
| md5 | b11c3ec5c3429224d8ddfcaecbd107b0 | Sample:MassLogger |