Analysis
- max time kernel
112s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
21/05/2022, 01:13
General
- Target PO3718852.exe
- Size 1.0MB
- Sample220521-bla7dscaf2
- SHA256 a73985784fd11ed9276d875521a98618001f232d756f3290b694466c16123a46
Malware Config
Extracted
-
C:\Users\Admin\AppData\Local\F95B724EDE\Log.txt
-
masslogger
- <|| v2.2.0.0 ||> User Name: Admin IP: 127.0.0.1 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 3:44:05 AM MassLogger Started: 5/21/2022 3:43:46 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\PO3718852.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 ||> NA
Signatures
- MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
- MassLogger Main Payload 1 IoCs
- MassLogger log file 1 IoCs
Detects a log file produced by MassLogger.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook profiles 1 TTPs 42 IoCs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 1 IoCs
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: EnumeratesProcesses 5 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\PO3718852.exe"C:\Users\Admin\AppData\Local\Temp\PO3718852.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\PO3718852.exe"C:\Users\Admin\AppData\Local\Temp\PO3718852.exe"2⤵
- Checks computer location settings
- Accesses Microsoft Outlook profiles
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
PO3718852.exe.log
memory/3404-130-0x0000000000FC0000-0x00000000010CC000-memory.dmp
memory/3404-131-0x0000000006870000-0x0000000006E14000-memory.dmp
memory/3404-132-0x00000000063A0000-0x0000000006432000-memory.dmp
memory/3520-134-0x0000000000400000-0x00000000004C4000-memory.dmp
memory/3520-136-0x0000000005130000-0x00000000051CC000-memory.dmp
memory/3520-137-0x00000000052C0000-0x0000000005326000-memory.dmp
memory/3520-138-0x00000000070B0000-0x00000000070BA000-memory.dmp
memory/3520-139-0x0000000007BC0000-0x0000000007C10000-memory.dmp