Analysis
- max time kernel
143s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
21/05/2022, 00:52
General
- Target invoice#09090999-Pdf.exe
- Size 860KB
- Sample220521-a8a98sbdh8
- SHA256 5756414989427044652d411548d7523b88c74449101d277d0b227a00c8526bc3
Malware Config
Extracted
-
C:\Users\Admin\AppData\Local\Temp\781F780B4E\Log.txt
-
masslogger
- ################################################################# MassLogger v1.3.4.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.51 Location: United States OS: Microsoft Windows 10 Pro64bit CPU: Intel Core Processor (Broadwell) GPU: Microsoft Basic Display Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 1:15:57 AM MassLogger Started: 5/21/2022 1:15:54 AM Interval: 1 hour MassLogger Process: C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:
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.
- Accesses Microsoft Outlook profiles 1 TTPs 18 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.
- Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
- Suspicious use of SetThreadContext 1 IoCs
- Suspicious behavior: EnumeratesProcesses 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\invoice#09090999-Pdf.exe"C:\Users\Admin\AppData\Local\Temp\invoice#09090999-Pdf.exe"1⤵
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"C:\Windows\\\\Microsoft.NET\\\\Framework\\\\v4.0.30319\\\\InstallUtil.exe"2⤵
- 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
Loading Replay Monitor...
Downloads
memory/716-133-0x0000000000400000-0x00000000004A8000-memory.dmp
memory/716-135-0x00000000056B0000-0x0000000005742000-memory.dmp
memory/716-136-0x0000000006480000-0x00000000064E6000-memory.dmp
memory/716-137-0x0000000006A50000-0x0000000006A5A000-memory.dmp
memory/716-138-0x0000000006AB0000-0x0000000006B00000-memory.dmp
memory/716-139-0x0000000006BA0000-0x0000000006C3C000-memory.dmp
memory/2560-130-0x00000000003D0000-0x00000000004AC000-memory.dmp
memory/2560-131-0x0000000005620000-0x0000000005BC4000-memory.dmp
memory/2560-134-0x0000000002930000-0x0000000002933000-memory.dmp