Analysis
- max time kernel
187s - max time network
182s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
21/05/2022, 12:19
General
- Target Enquiry.exe
- Size 797KB
- Sample220521-phcspsaefk
- SHA256 1f4f66b6c25fcf9e510c93af0fb57942013de942175617a7b3a515709a44bed5
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 2:32:47 PM MassLogger Started: 5/21/2022 2:32:34 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Enquiry.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 4 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Enquiry.exe"C:\Users\Admin\AppData\Local\Temp\Enquiry.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BOWbzufm" /XML "C:\Users\Admin\AppData\Local\Temp\tmp343A.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Enquiry.exe"{path}"2⤵
-
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C:\Users\Admin\AppData\Local\Temp\Enquiry.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
Enquiry.exe.log
tmp343A.tmp
memory/1448-142-0x0000000007B70000-0x0000000007BC0000-memory.dmp
memory/1448-141-0x0000000006DA0000-0x0000000006DAA000-memory.dmp
memory/1448-140-0x0000000005500000-0x0000000005566000-memory.dmp
memory/1448-138-0x0000000000400000-0x00000000004A8000-memory.dmp
memory/4304-133-0x00000000061E0000-0x0000000006784000-memory.dmp
memory/4304-130-0x0000000000660000-0x000000000072E000-memory.dmp
memory/4304-132-0x00000000051B0000-0x0000000005242000-memory.dmp
memory/4304-131-0x0000000005070000-0x000000000510C000-memory.dmp