MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25621381f0b715f8216faa86fb1540db9274540be863e88bd4886c607c292e16c18
MD5e55970e0acb80c7e08d33642f9bd082d
File Typeexe
Size1148.5 KB
First Seen2025-06-27
File Name21381f0b715f8216faa86fb1540db9274540be863e88bd4886c607c292e16c18
Tags213-209-150-18, exe, 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: 21381f0b715f8216faa86fb1540db9274540be863e88bd4886c607c292e16c18
  • MD5: e55970e0acb80c7e08d33642f9bd082d

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: 21381f0b715f8216"
        threat_level = "medium"
        first_seen = "2025-06-27"
    condition:
        hash.sha256(0, filesize) == "21381f0b715f8216faa86fb1540db9274540be863e88bd4886c607c292e16c18"
}

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 21381f0b715f8216faa86fb1540db9274540be863e88bd4886c607c292e16c18 # MD5 e55970e0acb80c7e08d33642f9bd082d
TypeValueNote
sha256 21381f0b715f8216faa86fb1540db9274540be863e88bd4886c607c292e16c18 Sample:MassLogger
md5 e55970e0acb80c7e08d33642f9bd082d Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi