Analysis
- max time kernel
31s - max time network
33s - platform
windows7_x64 - resource
win7-20230220-en - resource tags
- submitted
10/03/2023, 12:20
General
- Target 905daa5105082c1366f014e026fbdee5.exe
- Size 288KB
- Sample230310-phr8dsde78
- SHA256 bf71bd90c11bb97f08391a42466582b08c5089cf47ea9075dc7e1a24d1b97016
Malware Config
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 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.
- Accesses Microsoft Outlook profiles 1 TTPs 3 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: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\905daa5105082c1366f014e026fbdee5.exe"C:\Users\Admin\AppData\Local\Temp\905daa5105082c1366f014e026fbdee5.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\vaauw.exe"C:\Users\Admin\AppData\Local\Temp\vaauw.exe" C:\Users\Admin\AppData\Local\Temp\zjmbyaofxem.yab2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\vaauw.exe"C:\Users\Admin\AppData\Local\Temp\vaauw.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
gaywsvbazpy.bi
vaauw.exe
vaauw.exe
vaauw.exe
vaauw.exe
zjmbyaofxem.yab
vaauw.exe
vaauw.exe
vaauw.exe
memory/580-69-0x0000000000400000-0x0000000000441000-memory.dmp
memory/580-72-0x0000000000400000-0x0000000000441000-memory.dmp
memory/580-74-0x0000000000390000-0x00000000003C0000-memory.dmp
memory/580-76-0x00000000048F0000-0x0000000004930000-memory.dmp
memory/580-75-0x0000000000400000-0x0000000000441000-memory.dmp