MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256101bd5c2dc4ecb68e017d163bf7b8c472e12a3942cee6c9eed6ec70928409b26
MD5dc8dbb5812edb5e104011d84d409bc71
File Typeexe
Size780.5 KB
First Seen2026-05-21
File NameRFQ_Stark_Srl_SDH9822.com
Tagsexe, MassLogger

Malware Family: MassLogger

MassLogger, email tabanlı keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: 101bd5c2dc4ecb68e017d163bf7b8c472e12a3942cee6c9eed6ec70928409b26
  • MD5: dc8dbb5812edb5e104011d84d409bc71

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: 101bd5c2dc4ecb68"
        threat_level = "medium"
        first_seen = "2026-05-21"
    condition:
        hash.sha256(0, filesize) == "101bd5c2dc4ecb68e017d163bf7b8c472e12a3942cee6c9eed6ec70928409b26"
}

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 101bd5c2dc4ecb68e017d163bf7b8c472e12a3942cee6c9eed6ec70928409b26 # MD5 dc8dbb5812edb5e104011d84d409bc71
TypeValueNote
sha256 101bd5c2dc4ecb68e017d163bf7b8c472e12a3942cee6c9eed6ec70928409b26 Sample:MassLogger
md5 dc8dbb5812edb5e104011d84d409bc71 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi