MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256a0f5e6a15f2bc2013fd67ee717bb60742917fdd5f291bfd855d7f661a491f90a
MD5c0461bdbdc1142c2ed8d5462e83162ae
File Typevbe
Size857.1 KB
First Seen2025-06-16
File NameCOT_N°44545.vbe
TagsMassLogger, vbe

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: a0f5e6a15f2bc2013fd67ee717bb60742917fdd5f291bfd855d7f661a491f90a
  • MD5: c0461bdbdc1142c2ed8d5462e83162ae

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: a0f5e6a15f2bc201"
        threat_level = "medium"
        first_seen = "2025-06-16"
    condition:
        hash.sha256(0, filesize) == "a0f5e6a15f2bc2013fd67ee717bb60742917fdd5f291bfd855d7f661a491f90a"
}

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 a0f5e6a15f2bc2013fd67ee717bb60742917fdd5f291bfd855d7f661a491f90a # MD5 c0461bdbdc1142c2ed8d5462e83162ae
TypeValueNote
sha256 a0f5e6a15f2bc2013fd67ee717bb60742917fdd5f291bfd855d7f661a491f90a Sample:MassLogger
md5 c0461bdbdc1142c2ed8d5462e83162ae Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi