Analysis
- max time kernel
15s - max time network
113s - platform
windows10_x64 - resource
win10v20201028 - submitted
24/11/2020, 16:55
General
- Target mazx.exe
- Size 512KB
- Sample201124-rcbnn48zjs
- 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/3124-28-0x00000000082E0000-0x00000000082E1000-memory.dmp
memory/3124-27-0x0000000007D50000-0x0000000007D51000-memory.dmp
memory/3124-41-0x00000000097F0000-0x00000000097F1000-memory.dmp
memory/3124-40-0x0000000009890000-0x0000000009891000-memory.dmp
memory/3124-39-0x0000000009710000-0x0000000009711000-memory.dmp
memory/3124-38-0x0000000009310000-0x0000000009311000-memory.dmp
memory/3124-43-0x00000000097D0000-0x00000000097D1000-memory.dmp
memory/3124-31-0x0000000009330000-0x0000000009363000-memory.dmp
memory/3124-22-0x00000000075F0000-0x00000000075F1000-memory.dmp
memory/3124-29-0x0000000008520000-0x0000000008521000-memory.dmp
memory/3124-26-0x0000000007F90000-0x0000000007F91000-memory.dmp
memory/3124-24-0x0000000007C20000-0x0000000007C21000-memory.dmp
memory/3124-18-0x0000000073CE0000-0x00000000743CE000-memory.dmp
memory/3124-23-0x00000000074D0000-0x00000000074D1000-memory.dmp
memory/3124-21-0x0000000004A70000-0x0000000004A71000-memory.dmp
memory/3748-8-0x0000000000400000-0x0000000000486000-memory.dmp
memory/3748-20-0x00000000072A0000-0x00000000072A1000-memory.dmp
memory/3748-19-0x00000000071B0000-0x00000000071B1000-memory.dmp
memory/3748-15-0x00000000068A0000-0x00000000068A1000-memory.dmp
memory/3748-10-0x0000000073CE0000-0x00000000743CE000-memory.dmp
memory/4692-0-0x0000000073CE0000-0x00000000743CE000-memory.dmp
memory/4692-7-0x00000000072E0000-0x00000000072F6000-memory.dmp
memory/4692-6-0x0000000007100000-0x0000000007197000-memory.dmp
memory/4692-5-0x0000000004DC0000-0x0000000004DC1000-memory.dmp
memory/4692-4-0x0000000004DD0000-0x0000000004DD1000-memory.dmp
memory/4692-3-0x0000000005230000-0x0000000005231000-memory.dmp
memory/4692-1-0x0000000000500000-0x0000000000501000-memory.dmp