Analysis
- max time kernel
142s - max time network
111s - platform
windows10-2004_x64 - resource
win10v2004-20230220-en - resource tags
- submitted
22/02/2023, 14:37
General
- Target Swift Copy_img.exe
- Size 293KB
- Sample230222-ry5vjadh51
- SHA256 b973334a0b1014b26d319383958597c7d8d5271801ac3dcc6fb0a52b00e965dc
Malware Config
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Executes dropped EXE 2 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.
- 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: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 7 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Swift Copy_img.exe"C:\Users\Admin\AppData\Local\Temp\Swift Copy_img.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\fshud.exe"C:\Users\Admin\AppData\Local\Temp\fshud.exe" C:\Users\Admin\AppData\Local\Temp\ylicr.je2⤵
- 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\fshud.exe"C:\Users\Admin\AppData\Local\Temp\fshud.exe"3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- 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
fshud.exe
fshud.exe
fshud.exe
vnidmpjo.sem
ylicr.je
memory/2820-150-0x0000000004A60000-0x0000000004A70000-memory.dmp
memory/2820-153-0x0000000004A60000-0x0000000004A70000-memory.dmp
memory/2820-145-0x0000000000400000-0x0000000000441000-memory.dmp
memory/2820-147-0x0000000004A70000-0x0000000005014000-memory.dmp
memory/2820-148-0x0000000000400000-0x0000000000441000-memory.dmp
memory/2820-142-0x0000000000400000-0x0000000000441000-memory.dmp
memory/2820-151-0x0000000004A60000-0x0000000004A70000-memory.dmp
memory/2820-149-0x0000000004A60000-0x0000000004A70000-memory.dmp
memory/2820-152-0x00000000048A0000-0x0000000004906000-memory.dmp
memory/2820-144-0x0000000000400000-0x0000000000441000-memory.dmp
memory/2820-154-0x0000000006030000-0x00000000060C2000-memory.dmp
memory/2820-155-0x0000000006110000-0x000000000611A000-memory.dmp
memory/2820-156-0x0000000006170000-0x00000000061C0000-memory.dmp
memory/2820-157-0x0000000006360000-0x0000000006522000-memory.dmp
memory/2820-159-0x0000000004A60000-0x0000000004A70000-memory.dmp
memory/2820-160-0x0000000004A60000-0x0000000004A70000-memory.dmp
memory/2820-161-0x0000000004A60000-0x0000000004A70000-memory.dmp
memory/2820-162-0x0000000004A60000-0x0000000004A70000-memory.dmp