MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256a25c7904e75b9d178c4793182e67ffe856b4aa1855a00a040625af79195877ec
MD58025b0ed39e277519bbb54ca25fc7e16
File Typeexe
Size588.0 KB
First Seen2025-06-10
File Namea25c7904e75b9d178c4793182e67ffe856b4aa1855a00a040625af79195877ec
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: a25c7904e75b9d178c4793182e67ffe856b4aa1855a00a040625af79195877ec
  • MD5: 8025b0ed39e277519bbb54ca25fc7e16

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: a25c7904e75b9d17"
        threat_level = "medium"
        first_seen = "2025-06-10"
    condition:
        hash.sha256(0, filesize) == "a25c7904e75b9d178c4793182e67ffe856b4aa1855a00a040625af79195877ec"
}

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 a25c7904e75b9d178c4793182e67ffe856b4aa1855a00a040625af79195877ec # MD5 8025b0ed39e277519bbb54ca25fc7e16
TypeValueNote
sha256 a25c7904e75b9d178c4793182e67ffe856b4aa1855a00a040625af79195877ec Sample:MassLogger
md5 8025b0ed39e277519bbb54ca25fc7e16 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi