Analysis
- max time kernel
43s - max time network
117s - platform
windows7_x64 - resource
win7v200722 - submitted
04/08/2020, 13:27
General
- Target COTIZACION_00957342.exe
- Size 833KB
- Sample200804-e832x4z4ga
- SHA256 987e0b5d35a989d7eff88f7aed06a643e18d500266871e9e1cb901ed8f3d484a
Score
10/10
Malware Config
Extracted
Path
-
C:\Users\Admin\AppData\Local\42EF15E83D\Log.txt
-
masslogger
Ransom Note
- <|| v2.4.0.0 ||> User Name: Admin IP: 154.61.71.13 Location: United States Windows OS: Microsoft Windows 7 Professional 64bit Windows Serial Key: HYF8J-CVRMY-CM74G-RPHKF-PW487 CPU: Persocon Processor 2.5+ GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 8/4/2020 3:27:32 PM MassLogger Started: 8/4/2020 3:27:27 PM Interval: 1 hour MassLogger Process: C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| Downloader ||> Disabled <|| Bot Killer ||> Disabled <|| Window Searcher ||> 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
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- MassLogger log file 1 IoCs
Detects a log file produced by MassLogger.
- MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
- Suspicious use of WriteProcessMemory 8 IoCs
- Suspicious behavior: EnumeratesProcesses 3 IoCs
- Drops startup file 1 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.
Processes
-
C:\Users\Admin\AppData\Local\Temp\COTIZACION_00957342.exe"C:\Users\Admin\AppData\Local\Temp\COTIZACION_00957342.exe"1⤵
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- Drops startup file
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/272-0-0x0000000000400000-0x00000000004B8000-memory.dmp
memory/272-2-0x0000000000400000-0x00000000004B8000-memory.dmp
memory/272-3-0x0000000000400000-0x00000000004B8000-memory.dmp