MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b23f413608b561ab9534b5cc3d1108799eec27c5c3cba79e70df6ccff2b56dd4
MD54a40937be13e62a24ab50f8fedc78772
File Typeexe
Size1047.5 KB
First Seen2025-06-24
File NameDHL Air waybill.exe
TagsDHL, exe, 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: b23f413608b561ab9534b5cc3d1108799eec27c5c3cba79e70df6ccff2b56dd4
  • MD5: 4a40937be13e62a24ab50f8fedc78772

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: b23f413608b561ab"
        threat_level = "medium"
        first_seen = "2025-06-24"
    condition:
        hash.sha256(0, filesize) == "b23f413608b561ab9534b5cc3d1108799eec27c5c3cba79e70df6ccff2b56dd4"
}

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 b23f413608b561ab9534b5cc3d1108799eec27c5c3cba79e70df6ccff2b56dd4 # MD5 4a40937be13e62a24ab50f8fedc78772
TypeValueNote
sha256 b23f413608b561ab9534b5cc3d1108799eec27c5c3cba79e70df6ccff2b56dd4 Sample:MassLogger
md5 4a40937be13e62a24ab50f8fedc78772 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi