Analysis
- max time kernel
143s - max time network
154s - platform
windows10-2004_x64 - resource
win10v2004-20230703-en - resource tags
- submitted
07/07/2023, 09:38
General
- Target 261fad7a9f8939250bf2c3c1406f0fe9.exe
- Size 374KB
- Sample230707-ll2pfshc31
- SHA256 ea05e4097011864ccb2556f12a4be7568129a8a456975c696aea0cfbc7372cf4
Malware Config
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Loads dropped DLL 1 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.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Drops file in System32 directory 1 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
- Enumerates system info in registry 2 TTPs 2 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 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:\Users\Admin\AppData\Local\Temp\261fad7a9f8939250bf2c3c1406f0fe9.exe"C:\Users\Admin\AppData\Local\Temp\261fad7a9f8939250bf2c3c1406f0fe9.exe"1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\261fad7a9f8939250bf2c3c1406f0fe9.exe"C:\Users\Admin\AppData\Local\Temp\261fad7a9f8939250bf2c3c1406f0fe9.exe"2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
-
C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k netsvcs -p1⤵
- Drops file in System32 directory
- Checks processor information in registry
- Enumerates system info in registry
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
vfdhf.dll
memory/3716-148-0x0000000004FB0000-0x0000000005016000-memory.dmp
memory/3716-149-0x00000000049F0000-0x0000000004A00000-memory.dmp
memory/3716-141-0x0000000000400000-0x0000000000441000-memory.dmp
memory/3716-165-0x00000000049F0000-0x0000000004A00000-memory.dmp
memory/3716-143-0x0000000004A00000-0x0000000004FA4000-memory.dmp
memory/3716-145-0x00000000049F0000-0x0000000004A00000-memory.dmp
memory/3716-144-0x0000000000400000-0x0000000000441000-memory.dmp
memory/3716-146-0x00000000049F0000-0x0000000004A00000-memory.dmp
memory/3716-140-0x0000000000400000-0x0000000000441000-memory.dmp
memory/3716-147-0x00000000049F0000-0x0000000004A00000-memory.dmp
memory/3716-142-0x0000000000400000-0x0000000000441000-memory.dmp
memory/3716-150-0x0000000005CD0000-0x0000000005D20000-memory.dmp
memory/3716-151-0x0000000005D20000-0x0000000005EE2000-memory.dmp
memory/3716-152-0x0000000005F00000-0x0000000005F92000-memory.dmp
memory/3716-153-0x0000000006010000-0x000000000601A000-memory.dmp
memory/3716-162-0x00000000049F0000-0x0000000004A00000-memory.dmp
memory/3716-163-0x00000000049F0000-0x0000000004A00000-memory.dmp
memory/3716-164-0x00000000049F0000-0x0000000004A00000-memory.dmp
memory/4352-139-0x0000000003170000-0x0000000003172000-memory.dmp