Analysis
- max time kernel
135s - max time network
136s - platform
windows10_x64 - resource
win10v20201028 - submitted
24/11/2020, 16:54
General
- Target mazx.exe
- Size 512KB
- Sample201124-jlsq6d4tw2
- SHA256 58c4af7a3c7c29a946743a87767b53963707e149c09f3a8846c01ca831e84b3d
Malware Config
Signatures
- MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
- MassLogger Main Payload 2 IoCs
- 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.
- Adds Run key to start application 2 TTPs 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.
- Suspicious use of SetThreadContext 1 IoCs
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: EnumeratesProcesses 7 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\mazx.exe"C:\Users\Admin\AppData\Local\Temp\mazx.exe"1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\mazx.exe"C:\Users\Admin\AppData\Local\Temp\mazx.exe"2⤵
- Checks computer location settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\mazx.exe'3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/2884-28-0x0000000008080000-0x0000000008081000-memory.dmp
memory/2884-30-0x00000000088A0000-0x00000000088A1000-memory.dmp
memory/2884-44-0x0000000009A70000-0x0000000009A71000-memory.dmp
memory/2884-42-0x0000000009A80000-0x0000000009A81000-memory.dmp
memory/2884-41-0x0000000009AD0000-0x0000000009AD1000-memory.dmp
memory/2884-40-0x0000000009920000-0x0000000009921000-memory.dmp
memory/2884-39-0x00000000097B0000-0x00000000097B1000-memory.dmp
memory/2884-32-0x00000000097F0000-0x0000000009823000-memory.dmp
memory/2884-23-0x00000000078E0000-0x00000000078E1000-memory.dmp
memory/2884-29-0x00000000086E0000-0x00000000086E1000-memory.dmp
memory/2884-22-0x0000000004D30000-0x0000000004D31000-memory.dmp
memory/2884-25-0x0000000007820000-0x0000000007821000-memory.dmp
memory/2884-20-0x0000000073E00000-0x00000000744EE000-memory.dmp
memory/2884-24-0x0000000007780000-0x0000000007781000-memory.dmp
memory/2884-27-0x0000000008280000-0x0000000008281000-memory.dmp
memory/3412-7-0x0000000005870000-0x0000000005886000-memory.dmp
memory/3412-3-0x00000000058D0000-0x00000000058D1000-memory.dmp
memory/3412-0-0x0000000073E00000-0x00000000744EE000-memory.dmp
memory/3412-5-0x0000000005460000-0x0000000005461000-memory.dmp
memory/3412-6-0x0000000006ED0000-0x0000000006F67000-memory.dmp
memory/3412-1-0x0000000000BA0000-0x0000000000BA1000-memory.dmp
memory/3412-4-0x00000000054B0000-0x00000000054B1000-memory.dmp
memory/4052-19-0x0000000006CB0000-0x0000000006CB1000-memory.dmp
memory/4052-16-0x00000000063B0000-0x00000000063B1000-memory.dmp
memory/4052-8-0x0000000000400000-0x0000000000486000-memory.dmp
memory/4052-21-0x0000000006DA0000-0x0000000006DA1000-memory.dmp
memory/4052-11-0x0000000073E00000-0x00000000744EE000-memory.dmp