Analysis
- max time kernel
107s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
07/02/2023, 15:44
General
- Target PO_72302991PDF.exe
- Size 318KB
- Sample230207-s6gncaff5w
- SHA256 6dcb88d4431e0ea3673e741ac379ea47c01665f39c751f02344bc09767d9e1bb
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: 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\PO_72302991PDF.exe"C:\Users\Admin\AppData\Local\Temp\PO_72302991PDF.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\ymowuhnmtc.exe"C:\Users\Admin\AppData\Local\Temp\ymowuhnmtc.exe" C:\Users\Admin\AppData\Local\Temp\dyimpdhxltv.h2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\ymowuhnmtc.exe"C:\Users\Admin\AppData\Local\Temp\ymowuhnmtc.exe"3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- 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
dyimpdhxltv.h
tnobsnboj.w
ymowuhnmtc.exe
ymowuhnmtc.exe
ymowuhnmtc.exe
memory/2616-139-0x0000000005A80000-0x0000000006024000-memory.dmp
memory/2616-140-0x0000000000400000-0x0000000000441000-memory.dmp
memory/2616-141-0x0000000005550000-0x00000000055B6000-memory.dmp
memory/2616-142-0x0000000006D00000-0x0000000006D92000-memory.dmp
memory/2616-143-0x0000000006CB0000-0x0000000006CBA000-memory.dmp
memory/2616-144-0x0000000006FD0000-0x0000000007020000-memory.dmp
memory/2616-145-0x0000000007270000-0x0000000007432000-memory.dmp