General

  • Target

    50917f02e651e561e9bf8bdcbfd3d7603fe9c6ea08a08d9953967500fcf864c2

  • Size

    476KB

  • Sample

    220521-dh7gjafgc4

  • MD5

    0868eed0dbd6a06a76bbcd047e6d2760

  • SHA1

    a09cda0a34ccdcaec6d1be2b0ec5c174391aff74

  • SHA256

    50917f02e651e561e9bf8bdcbfd3d7603fe9c6ea08a08d9953967500fcf864c2

  • SHA512

    f881dd32277fdfd67fdfc735785b419889d20432ec565f802f1b477fe6f7b053cbb5e6590385f087da2fd71544239cfe34eb0737e0a189580275ca5de38a548b

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\3B8E3C2477\Log.txt

Family

masslogger

Ransom Note
<|| v2.1.0.0 ||> User Name: Admin IP: 127.0.0.1 Location: United States Windows OS: Microsoft Windows 7 Ultimate 64bit Windows Serial Key: D4F6K-QK3RD-TMVMJ-BBMRX-3MBMV CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 6:32:46 AM MassLogger Started: 5/21/2022 6:32:26 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\RegAsm.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| USB Spread ||> Disabled <|| Downloader ||> Disabled <|| Window Searcher ||> Disabled <|| Bot Killer ||> Disabled <|| Search And Upload ||> Disabled <|| Telegram Desktop ||> Not Installed <|| Pidgin ||> Not Installed <|| FileZilla ||> Not Installed <|| Discord Tokken ||> Not Installed <|| NordVPN ||> Not Installed <|| Outlook ||> Not Installed <|| FoxMail ||> Not Installed <|| Thunderbird ||> Not Installed <|| FireFox ||> Not Found <|| QQ Browser ||> Not Installed <|| Chromium Recovery ||> Not Installed or Not Found <|| Keylogger And Clipboard ||> Disabled

Extracted

Path

C:\Users\Admin\AppData\Local\781F780B4E\Log.txt

Family

masslogger

Ransom Note
<|| v2.1.0.0 ||> User Name: Admin IP: 154.61.71.51 Location: United States Windows OS: Microsoft Windows 10 Pro 64bit Windows Serial Key: W269N-WFGWX-YVC9B-4J6C9-T83GX CPU: Intel Core Processor (Broadwell) GPU: Microsoft Basic Display Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 4:31:15 AM MassLogger Started: 5/21/2022 4:31:12 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\RegAsm.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| Downloader ||> Disabled <|| USB Spread ||> Disabled <|| Window Searcher ||> Disabled <|| Bot Killer ||> Disabled <|| Search And Upload ||> Disabled <|| Telegram Desktop ||> Not Installed <|| Pidgin ||> Not Installed <|| FileZilla ||> Not Installed <|| Discord Tokken ||> Not Installed <|| NordVPN ||> Not Installed <|| Outlook ||> Not Installed <|| FoxMail ||> Not Installed <|| Thunderbird ||> Not Installed <|| FireFox ||> Not Found <|| QQ Browser ||> Not Installed <|| Chromium Recovery ||> Not Installed or Not Found <|| Keylogger And Clipboard ||> Disabled

Targets

    • Target

      952110_2020713.exe

    • Size

      1.3MB

    • MD5

      52e2dd01e70bce5aac4f44e19c2876e1

    • SHA1

      bf7326838f7b86565769f1c122bdebbbf5b6a097

    • SHA256

      f486c5d5fe3c9341cd331a8e6a68102a9bd7a9e7864c5179948c585806828006

    • SHA512

      1ab82d5d08de1f877ec4c45d75597f4d584460bf37c6e8e271f6ebc74a452f14b39c84cc22b2bf8a3fadeaa53f87881dcacafeeedfcaf500d34e09a8f659ddbd

    • MassLogger

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

    • MassLogger Main Payload

    • 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

    • Adds Run key to start application

    • 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

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Tasks