MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2566963136965cd4a8cab567d7dc4435484e5a390946d3bb811878ce91f78ddc15c
MD58574b1fa5096cdadbe9bca964ed184dc
File Typevbs
Size16.4 KB
First Seen2025-09-12
File NameMsBuildRoc.vbs
TagsMassLogger, vbs

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: 6963136965cd4a8cab567d7dc4435484e5a390946d3bb811878ce91f78ddc15c
  • MD5: 8574b1fa5096cdadbe9bca964ed184dc

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: 6963136965cd4a8c"
        threat_level = "medium"
        first_seen = "2025-09-12"
    condition:
        hash.sha256(0, filesize) == "6963136965cd4a8cab567d7dc4435484e5a390946d3bb811878ce91f78ddc15c"
}

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 6963136965cd4a8cab567d7dc4435484e5a390946d3bb811878ce91f78ddc15c # MD5 8574b1fa5096cdadbe9bca964ed184dc
TypeValueNote
sha256 6963136965cd4a8cab567d7dc4435484e5a390946d3bb811878ce91f78ddc15c Sample:MassLogger
md5 8574b1fa5096cdadbe9bca964ed184dc Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi