Analysis
- max time kernel
93s - max time network
81s - platform
windows10-2004_x64 - resource
win10v2004-20230220-en - resource tags
- submitted
24/02/2023, 14:04
General
- Target INVOICE.exe
- Size 244KB
- Sample230224-rc9llade51
- SHA256 c256525c8f37a9a8fa3f42995a9d257d4305e7939ccb35949a856ecc8b2a99e2
Malware Config
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla payload 2 IoCs
- Drops file in Drivers directory 1 IoCs
- Executes dropped EXE 3 IoCs
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- UPX packed file 4 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious behavior: MapViewOfSection 2 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 10 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\INVOICE.exe"C:\Users\Admin\AppData\Local\Temp\INVOICE.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\hsraxf.exe"C:\Users\Admin\AppData\Local\Temp\hsraxf.exe" C:\Users\Admin\AppData\Local\Temp\nvgrorrkq.bsl2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\hsraxf.exe"C:\Users\Admin\AppData\Local\Temp\hsraxf.exe"3⤵
- Executes dropped EXE
-
-
C:\Users\Admin\AppData\Local\Temp\hsraxf.exe"C:\Users\Admin\AppData\Local\Temp\hsraxf.exe"3⤵
- Drops file in Drivers directory
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
hsraxf.exe
hsraxf.exe
hsraxf.exe
hsraxf.exe
ifykhr.lno
nvgrorrkq.bsl
memory/2272-143-0x0000000000760000-0x0000000000762000-memory.dmp
memory/5028-150-0x0000000005DD0000-0x0000000006374000-memory.dmp
memory/5028-154-0x0000000005810000-0x0000000005820000-memory.dmp
memory/5028-149-0x0000000000400000-0x0000000000451000-memory.dmp
memory/5028-144-0x0000000000400000-0x0000000000451000-memory.dmp
memory/5028-151-0x00000000058C0000-0x0000000005952000-memory.dmp
memory/5028-152-0x0000000000400000-0x0000000000451000-memory.dmp
memory/5028-153-0x0000000005810000-0x0000000005820000-memory.dmp
memory/5028-147-0x0000000000400000-0x0000000000451000-memory.dmp
memory/5028-155-0x0000000005A50000-0x0000000005AEC000-memory.dmp
memory/5028-156-0x0000000005810000-0x0000000005820000-memory.dmp
memory/5028-157-0x0000000006A80000-0x0000000006AE6000-memory.dmp
memory/5028-158-0x0000000005810000-0x0000000005820000-memory.dmp
memory/5028-159-0x0000000005810000-0x0000000005820000-memory.dmp
memory/5028-160-0x0000000005810000-0x0000000005820000-memory.dmp
memory/5028-162-0x0000000001620000-0x0000000001670000-memory.dmp
memory/5028-163-0x0000000006A70000-0x0000000006A7A000-memory.dmp