General

  • Target

    90b541c5d2b2738109fe53bef96ac20d79f45997467fa7417c74bef812850b8c

  • Size

    1.4MB

  • Sample

    220521-xk5khacaa2

  • MD5

    42ea996963b40fa149c967edb3def794

  • SHA1

    3512df1624733f01b383d06a8c723ecd47fe2e1e

  • SHA256

    90b541c5d2b2738109fe53bef96ac20d79f45997467fa7417c74bef812850b8c

  • SHA512

    4bb335df18f75d13a7a28f3e2366d5b1e2ceebad6c877701d95ebbcfa18e425a2b882d9b9681f5adf6a2dc9509bfb347ef84c57203378ca62ba855c44d047b95

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\AEF946DCB4\Log.txt

Family

masslogger

Ransom Note
################################################################# MassLogger v1.3.3.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.50 Location: United States OS: Microsoft Windows 7 Ultimate 64bit CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 8:57:08 PM MassLogger Started: 5/21/2022 8:56:57 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe As Administrator: True

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.com
  • Port:
    587
  • Username:
    m4cfund@yandex.com
  • Password:
    Dmacdavid

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\2EF8342664\Log.txt

Family

masslogger

Ransom Note
################################################################# MassLogger v1.3.3.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.50 Location: United States OS: Microsoft Windows 10 Pro64bit CPU: Intel Core Processor (Broadwell) GPU: Microsoft Basic Display Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 8:56:44 PM MassLogger Started: 5/21/2022 8:56:41 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe As Administrator: True

Targets

    • Target

      Veitstar Inquiry.exe

    • Size

      2.5MB

    • MD5

      5c8c2fb2fbd3c20a62a107e34226e90f

    • SHA1

      c85262bd4d832a4ef68ef1940cee8501d1cab90e

    • SHA256

      44a169140fbd4a243478d8504cb62dd7a5d2225df55d058c4aa71dd0c0d7c480

    • SHA512

      9912e0231369acce4cf7b63e1f2d06c76a0161bc85e13789ab02129774de8dcf6c57f30a694d8180491e7eb42112cd22c75d79587882f836255919fcde11f246

    • MassLogger

      Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

    • MassLogger log file

      Detects a log file produced by MassLogger.

    • Executes dropped EXE

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Loads dropped DLL

    • Obfuscated with Agile.Net obfuscator

      Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses Microsoft Outlook profiles

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Tasks