MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25698befdf040b021045e164086dcb58d1139d366c3176365a8d36d4d1fb52e42fc
MD531a9bb07cffc8df3422a36ae29753a56
File Typeexe
Size1568.0 KB
First Seen2025-11-19
File NamePR 40039082 COMMERCIAL-BDS 181125.exe
Tagsexe, 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: 98befdf040b021045e164086dcb58d1139d366c3176365a8d36d4d1fb52e42fc
  • MD5: 31a9bb07cffc8df3422a36ae29753a56

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: 98befdf040b02104"
        threat_level = "medium"
        first_seen = "2025-11-19"
    condition:
        hash.sha256(0, filesize) == "98befdf040b021045e164086dcb58d1139d366c3176365a8d36d4d1fb52e42fc"
}

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 98befdf040b021045e164086dcb58d1139d366c3176365a8d36d4d1fb52e42fc # MD5 31a9bb07cffc8df3422a36ae29753a56
TypeValueNote
sha256 98befdf040b021045e164086dcb58d1139d366c3176365a8d36d4d1fb52e42fc Sample:MassLogger
md5 31a9bb07cffc8df3422a36ae29753a56 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi