Analysis
- max time kernel
149s - max time network
139s - platform
windows10-2004_x64 - resource
win10v2004-20240611-it - resource tags
- submitted
18/06/2024, 12:38
General
- Target F24_023.pdf.js
- Size 2KB
- Sample240618-pvbq6stdrg
- SHA256 e84a0e1c0a65c25debdef56aaab3c45130629fc05a93658f6ef63396ac93ba9d
Malware Config
Signatures
- Blocklisted process makes network request 1 IoCs
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- UPX packed file 3 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
- Accesses Microsoft Outlook profiles 1 TTPs 4 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
- Drops file in Program Files directory 1 IoCs
- Command and Scripting Interpreter: JavaScript 1 TTPs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Checks processor information in registry 2 TTPs 21 IoCs
Processor information is often read in order to detect sandboxing environments.
- Modifies system certificate store 2 TTPs 2 IoCs
- Script User-Agent 1 IoCs
Uses user-agent string associated with script host/environment.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Windows\system32\wscript.exewscript.exe C:\Users\Admin\AppData\Local\Temp\F24_023.pdf.js1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Public\temp_2312.pdf.exe"C:\Users\Public\temp_2312.pdf.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- Accesses Microsoft Outlook accounts
- Accesses Microsoft Outlook profiles
- Enumerates connected drives
- Drops file in Program Files directory
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
-
C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath C:\Users\Public\temp_2312.pdf.exe3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
Network
MITRE ATT&CK Enterprise v15
Defense Evasion
Modify Registry
1Subvert Trust Controls
1Install Root Certificate
1Credential Access
Unsecured Credentials
2Credentials In Files
1Credentials in Registry
1Replay Monitor
Loading Replay Monitor...
Downloads
Yfdiuahpu
__PSScriptPolicyTest_n4ctnoqn.gyb.ps1
temp_2312.pdf.exe
memory/2880-92-0x0000027851420000-0x0000027851522000-memory.dmp
memory/2880-79-0x00000278510F0000-0x0000027851112000-memory.dmp
memory/2880-80-0x0000027851160000-0x0000027851170000-memory.dmp
memory/2880-69-0x0000027851180000-0x0000027851202000-memory.dmp
memory/3176-81-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-87-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-16-0x0000000000400000-0x00000000011EC000-memory.dmp
memory/3176-17-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-20-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-19-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-14-0x000000006E400000-0x000000006E49E000-memory.dmp
memory/3176-48-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-59-0x0000000063080000-0x0000000063301000-memory.dmp
memory/3176-67-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-68-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-12-0x0000000063080000-0x0000000063301000-memory.dmp
memory/3176-13-0x0000000063080000-0x0000000063301000-memory.dmp
memory/3176-11-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-10-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-9-0x0000000001360000-0x0000000001361000-memory.dmp
memory/3176-82-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-86-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-84-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-15-0x000000006E400000-0x000000006E49E000-memory.dmp
memory/3176-89-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-88-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-83-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-90-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-91-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-8-0x0000000000400000-0x00000000011EC000-memory.dmp
memory/3176-85-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-96-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-110-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-104-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-112-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-114-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-120-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-118-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-117-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-121-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-119-0x0000000003BA0000-0x0000000004901000-memory.dmp
memory/3176-122-0x0000000003BA0000-0x0000000004901000-memory.dmp