MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256f8c1683dbfc0d40b23f720566b527ea31d96a1e24e605805c1d4646af7fde61c
MD5130885914105ffcc7be507d9c2db1808
File Typeexe
Size782.0 KB
First Seen2025-07-07
File Namef8c1683dbfc0d40b23f720566b527ea31d96a1e24e605805c1d4646af7fde61c
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: f8c1683dbfc0d40b23f720566b527ea31d96a1e24e605805c1d4646af7fde61c
  • MD5: 130885914105ffcc7be507d9c2db1808

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: f8c1683dbfc0d40b"
        threat_level = "medium"
        first_seen = "2025-07-07"
    condition:
        hash.sha256(0, filesize) == "f8c1683dbfc0d40b23f720566b527ea31d96a1e24e605805c1d4646af7fde61c"
}

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 f8c1683dbfc0d40b23f720566b527ea31d96a1e24e605805c1d4646af7fde61c # MD5 130885914105ffcc7be507d9c2db1808
TypeValueNote
sha256 f8c1683dbfc0d40b23f720566b527ea31d96a1e24e605805c1d4646af7fde61c Sample:MassLogger
md5 130885914105ffcc7be507d9c2db1808 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi