Analysis
- max time kernel
108s - max time network
140s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
05/01/2023, 14:30
General
- Target obizx.exe
- Size 667KB
- Sample230105-rt5zqscc93
- SHA256 7a5b7449fcd765f1a3be1dc0c8286cb46afe94b8c8040a0d268b27fe8d658ee4
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
- 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: EnumeratesProcesses 3 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 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\obizx.exe"C:\Users\Admin\AppData\Local\Temp\obizx.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\wfbara.exe"C:\Users\Admin\AppData\Local\Temp\wfbara.exe" C:\Users\Admin\AppData\Local\Temp\ljeqsvcix.cr2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\wfbara.exe"C:\Users\Admin\AppData\Local\Temp\wfbara.exe"3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
eevmqfrpo.nw
ljeqsvcix.cr
wfbara.exe
wfbara.exe
wfbara.exe
memory/728-139-0x0000000000400000-0x0000000000449000-memory.dmp
memory/728-140-0x0000000004970000-0x0000000004F14000-memory.dmp
memory/728-141-0x00000000048B0000-0x000000000494C000-memory.dmp
memory/728-142-0x0000000005820000-0x0000000005886000-memory.dmp
memory/728-143-0x0000000006180000-0x0000000006212000-memory.dmp
memory/728-144-0x00000000063F0000-0x0000000006440000-memory.dmp
memory/728-145-0x0000000006480000-0x000000000648A000-memory.dmp