Analysis
- max time kernel
56s - max time network
154s - platform
windows10_x64 - resource
win10v20210408 - submitted
01/07/2021, 04:40
General
- Target Purchase Order.bin.exe
- Size 796KB
- Sample210701-v2dp3llsja
- SHA256 6ad5aee17e0fa5baa1a5ba9b0375faa8e98ff72dd4a79e5fb8209237167e119d
Malware Config
Extracted
-
C:\Users\Admin\AppData\Local\Temp\1A60FBA9DF\Log.txt
-
masslogger
- ################################################################# MassLogger v1.3.8.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.13 Location: United States Windows OS: Microsoft Windows 10 Enterprise64bit Windows Serial Key: W269N-WFGWX-YVC9B-4J6C9-T83GX CPU: Persocon Processor 2.5+ GPU: Microsoft Basic Display Adapter AV: NA Screen Resolution: 1280x720 Current Time: 7/1/2021 6:45:03 AM MassLogger Started: 7/1/2021 6:44:59 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Purchase Order.bin.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 2 IoCs
- MassLogger log file 1 IoCs
Detects a log file produced by MassLogger.
- Looks for VirtualBox Guest Additions in registry 2 TTPs
- ReZer0 packer 1 IoCs
Detects ReZer0, a packer with multiple versions used in various campaigns.
- Looks for VMWare Tools registry key 2 TTPs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- 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.
- 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
- 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 5 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Purchase Order.bin.exe"C:\Users\Admin\AppData\Local\Temp\Purchase Order.bin.exe"1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\XxGCOrqT" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE97.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Purchase Order.bin.exe"{path}"2⤵
- Checks computer location settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/644-119-0x0000000004900000-0x0000000004901000-memory.dmp
memory/644-117-0x00000000048A0000-0x00000000048A2000-memory.dmp
memory/644-114-0x0000000000020000-0x0000000000021000-memory.dmp
memory/644-120-0x0000000006680000-0x0000000006729000-memory.dmp
memory/644-121-0x0000000006C30000-0x0000000006C31000-memory.dmp
memory/644-122-0x0000000005340000-0x0000000005341000-memory.dmp
memory/644-116-0x0000000004CB0000-0x0000000004CB1000-memory.dmp
memory/644-118-0x0000000004DF0000-0x0000000004DF1000-memory.dmp
memory/4032-125-0x0000000000400000-0x00000000004A8000-memory.dmp
memory/4032-132-0x0000000005000000-0x000000000503E000-memory.dmp
memory/4032-133-0x0000000004FF0000-0x0000000004FF1000-memory.dmp
memory/4032-136-0x0000000004FF3000-0x0000000004FF5000-memory.dmp
memory/4032-137-0x0000000006DE0000-0x0000000006DE1000-memory.dmp
memory/4032-138-0x00000000080C0000-0x00000000080C1000-memory.dmp