Analysis
- max time kernel
143s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
21/05/2022, 11:16
General
- Target Proforma invoice.exe
- Size 1.0MB
- Sample220521-nc91ksdeb6
- SHA256 14a6d8b3111df647667bfe418bfd55354a13e1b7b3f69e229d9495dc6fd6ab34
Malware Config
Extracted
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C:\Users\Admin\AppData\Local\0F48153F20\Log.txt
-
masslogger
- <|| v2.4.0.0 ||> 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 11:37:16 AM MassLogger Started: 5/21/2022 11:37:13 AM Interval: 3 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Proforma invoice.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> 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 ||> NA
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: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: EnumeratesProcesses 7 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 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\Proforma invoice.exe"C:\Users\Admin\AppData\Local\Temp\Proforma invoice.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- 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\QOqjtbo" /XML "C:\Users\Admin\AppData\Local\Temp\tmp829D.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Proforma invoice.exe"{path}"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
Proforma invoice.exe.log
tmp829D.tmp
memory/2560-130-0x00000000002B0000-0x00000000003BA000-memory.dmp
memory/2560-131-0x00000000051B0000-0x0000000005754000-memory.dmp
memory/2560-132-0x0000000004CA0000-0x0000000004D32000-memory.dmp
memory/2560-133-0x0000000004C20000-0x0000000004C2A000-memory.dmp
memory/2560-134-0x00000000078C0000-0x000000000795C000-memory.dmp
memory/4444-138-0x0000000000400000-0x00000000004B8000-memory.dmp
memory/4444-140-0x0000000005690000-0x00000000056F6000-memory.dmp
memory/4444-141-0x0000000007100000-0x0000000007150000-memory.dmp