MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b1bd37ebff0fc42b749c9dc3a6514954f5c04ede19977faa2747041738c09d98
MD55c90b5a12d35f284c51fea2f03a93a5b
File Typeexe
Size1174.0 KB
First Seen2025-07-07
File Nameb1bd37ebff0fc42b749c9dc3a6514954f5c04ede19977faa2747041738c09d98
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: b1bd37ebff0fc42b749c9dc3a6514954f5c04ede19977faa2747041738c09d98
  • MD5: 5c90b5a12d35f284c51fea2f03a93a5b

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: b1bd37ebff0fc42b"
        threat_level = "medium"
        first_seen = "2025-07-07"
    condition:
        hash.sha256(0, filesize) == "b1bd37ebff0fc42b749c9dc3a6514954f5c04ede19977faa2747041738c09d98"
}

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 b1bd37ebff0fc42b749c9dc3a6514954f5c04ede19977faa2747041738c09d98 # MD5 5c90b5a12d35f284c51fea2f03a93a5b
TypeValueNote
sha256 b1bd37ebff0fc42b749c9dc3a6514954f5c04ede19977faa2747041738c09d98 Sample:MassLogger
md5 5c90b5a12d35f284c51fea2f03a93a5b Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi