Analysis
- max time kernel
79s - max time network
101s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
15/04/2022, 01:04
General
- Target ROLLY 3Y23RY4R2.exe
- Size 836KB
- Sample220415-beyn4sfeap
- SHA256 1a59f2492b5b15c0678e6134d6ec4df38c45de5555767463cf9590bfdb1fdda8
Malware Config
Extracted
-
C:\Users\Admin\AppData\Local\Temp\8236ADF044\Log.txt
-
masslogger
- ################################################################# MassLogger v1.3.8.0 ################################################################# ### Logger Details ### User Name: Admin IP: 127.0.0.1 Location: United States Windows OS: Microsoft Windows 10 Pro64bit 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: 4/15/2022 3:32:29 AM MassLogger Started: 4/15/2022 3:32:15 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\ROLLY 3Y23RY4R2.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 Main Payload 1 IoCs
- MassLogger log file 1 IoCs
Detects a log file produced by MassLogger.
- 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.
- 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.
- Suspicious use of SetThreadContext 1 IoCs
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\ROLLY 3Y23RY4R2.exe"C:\Users\Admin\AppData\Local\Temp\ROLLY 3Y23RY4R2.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\ROLLY 3Y23RY4R2.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
ROLLY 3Y23RY4R2.exe.log
memory/2976-130-0x0000000000DC0000-0x0000000000E98000-memory.dmp
memory/2976-131-0x0000000005E50000-0x00000000063F4000-memory.dmp
memory/2976-132-0x00000000058A0000-0x0000000005932000-memory.dmp
memory/2976-133-0x0000000006770000-0x000000000680C000-memory.dmp
memory/3424-135-0x0000000000400000-0x00000000004A8000-memory.dmp
memory/3424-137-0x00000000051B0000-0x0000000005216000-memory.dmp
memory/3424-138-0x0000000006B80000-0x0000000006B8A000-memory.dmp
memory/3424-139-0x00000000025A3000-0x00000000025A5000-memory.dmp
memory/3424-140-0x0000000008000000-0x0000000008050000-memory.dmp