Analysis
- max time kernel
148s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
24/05/2022, 23:47
General
- Target PO-NA0U909098899900.exe
- Size 1.1MB
- Sample220524-3tchzacaf7
- SHA256 5467d4952a438b7025b7e6661bbc5755b94db5553e4534d2924dd60a9051efba
Malware Config
Extracted
-
C:\Users\Admin\AppData\Local\8236ADF044\Log.txt
-
masslogger
- <|| v2.1.0.0 ||> User Name: Admin IP: 154.61.71.50 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: 5/25/2022 1:51:48 AM MassLogger Started: 5/25/2022 1:50:46 AM Interval: 96 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\PO-NA0U909098899900.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
Signatures
- MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
- MassLogger log file 1 IoCs
Detects a log file produced by MassLogger.
- Checks computer location settings 2 TTPs 2 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 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 1 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\PO-NA0U909098899900.exe"C:\Users\Admin\AppData\Local\Temp\PO-NA0U909098899900.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\sTnSVVcfDErzA" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2858.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\PO-NA0U909098899900.exe"{path}"2⤵
- Checks computer location settings
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
PO-NA0U909098899900.exe.log
tmp2858.tmp
memory/3540-130-0x00000000000C0000-0x00000000001DC000-memory.dmp
memory/3540-131-0x0000000005020000-0x00000000055C4000-memory.dmp
memory/3540-132-0x0000000004B70000-0x0000000004C02000-memory.dmp
memory/3540-133-0x0000000004CB0000-0x0000000004D4C000-memory.dmp
memory/4916-137-0x0000000000400000-0x000000000049A000-memory.dmp
memory/4916-139-0x00000000052E0000-0x0000000005346000-memory.dmp
memory/4916-140-0x0000000006CC0000-0x0000000006CCA000-memory.dmp
memory/4916-141-0x0000000006D50000-0x0000000006DA0000-memory.dmp