MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256a1fefd86ae0ef828a917d9a9b5321f61c89ba2c74d1b73e668687589e0f8966f
MD58036a2d130ead99c057b173c114d3454
File Typeexe
Size1132.0 KB
First Seen2025-07-07
File Namea1fefd86ae0ef828a917d9a9b5321f61c89ba2c74d1b73e668687589e0f8966f
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: a1fefd86ae0ef828a917d9a9b5321f61c89ba2c74d1b73e668687589e0f8966f
  • MD5: 8036a2d130ead99c057b173c114d3454

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: a1fefd86ae0ef828"
        threat_level = "medium"
        first_seen = "2025-07-07"
    condition:
        hash.sha256(0, filesize) == "a1fefd86ae0ef828a917d9a9b5321f61c89ba2c74d1b73e668687589e0f8966f"
}

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 a1fefd86ae0ef828a917d9a9b5321f61c89ba2c74d1b73e668687589e0f8966f # MD5 8036a2d130ead99c057b173c114d3454
TypeValueNote
sha256 a1fefd86ae0ef828a917d9a9b5321f61c89ba2c74d1b73e668687589e0f8966f Sample:MassLogger
md5 8036a2d130ead99c057b173c114d3454 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi