Analysis
- max time kernel
187s - max time network
183s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
21/05/2022, 12:25
General
- Target Outstanding PO - 14-Jun-2020.exe
- Size 823KB
- Sample220521-plpaxafef7
- SHA256 8caf81f11bf9898ce2e1e91ed450197ae089f1088c666a2d665ae589ceb12a7e
Malware Config
Extracted
-
C:\Users\Admin\AppData\Local\Temp\F95B724EDE\Log.txt
-
masslogger
- ################################################################# MassLogger v1.3.7.1 ################################################################# ### 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: 5/21/2022 3:08:51 PM MassLogger Started: 5/21/2022 3:08:38 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Outstanding PO - 14-Jun-2020.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 2 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
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- 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 11 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Outstanding PO - 14-Jun-2020.exe"C:\Users\Admin\AppData\Local\Temp\Outstanding PO - 14-Jun-2020.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\wTsrvEKyiYD" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA2F7.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\Outstanding PO - 14-Jun-2020.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
Outstanding PO - 14-Jun-2020.exe.log
tmpA2F7.tmp
memory/2288-137-0x0000000000400000-0x00000000004A8000-memory.dmp
memory/2288-139-0x00000000056F0000-0x0000000005756000-memory.dmp
memory/2288-140-0x00000000074D0000-0x00000000074DA000-memory.dmp
memory/2288-141-0x00000000079B0000-0x0000000007A00000-memory.dmp
memory/4848-130-0x0000000000AA0000-0x0000000000B74000-memory.dmp
memory/4848-131-0x00000000054E0000-0x000000000557C000-memory.dmp
memory/4848-132-0x0000000005620000-0x00000000056B2000-memory.dmp
memory/4848-133-0x0000000006640000-0x0000000006BE4000-memory.dmp