Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
12/05/2022, 10:31
General
- Target Signed_document.exe
- Size 557KB
- Sample220512-mkc55sehgm
- SHA256 ebdbd8487dfdaebc34214de4e2f6fdfc5b5cfb30b9fa98ca9269a4cfae16cb93
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
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Host
webmail.wrcs.in
-
Port
587
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Username
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Password
Sales@0006
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Signed_document.exe"C:\Users\Admin\AppData\Local\Temp\Signed_document.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\SrzBThDELWdXq.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\SrzBThDELWdXq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2A0D.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Signed_document.exe"C:\Users\Admin\AppData\Local\Temp\Signed_document.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 appmodel -p -s camsvc1⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
tmp2A0D.tmp
memory/2804-131-0x0000000005FB0000-0x0000000006554000-memory.dmp
memory/2804-132-0x0000000005920000-0x00000000059B2000-memory.dmp
memory/2804-133-0x0000000005AF0000-0x0000000005AFA000-memory.dmp
memory/2804-134-0x0000000007E70000-0x0000000007F0C000-memory.dmp
memory/2804-135-0x0000000008760000-0x00000000087C6000-memory.dmp
memory/2804-130-0x0000000000EF0000-0x0000000000F82000-memory.dmp
memory/4164-148-0x0000000006630000-0x000000000664E000-memory.dmp
memory/4164-147-0x0000000070C60000-0x0000000070CAC000-memory.dmp
memory/4164-141-0x0000000005170000-0x0000000005798000-memory.dmp
memory/4164-156-0x00000000076C0000-0x00000000076C8000-memory.dmp
memory/4164-155-0x00000000076E0000-0x00000000076FA000-memory.dmp
memory/4164-143-0x0000000004FC0000-0x0000000004FE2000-memory.dmp
memory/4164-144-0x0000000005990000-0x00000000059F6000-memory.dmp
memory/4164-145-0x0000000006090000-0x00000000060AE000-memory.dmp
memory/4164-146-0x0000000006650000-0x0000000006682000-memory.dmp
memory/4164-138-0x0000000002790000-0x00000000027C6000-memory.dmp
memory/4164-149-0x00000000079E0000-0x000000000805A000-memory.dmp
memory/4164-150-0x00000000073A0000-0x00000000073BA000-memory.dmp
memory/4164-151-0x0000000007410000-0x000000000741A000-memory.dmp
memory/4164-152-0x0000000007620000-0x00000000076B6000-memory.dmp
memory/4164-154-0x00000000075D0000-0x00000000075DE000-memory.dmp
memory/4812-153-0x0000000006C70000-0x0000000006CC0000-memory.dmp
memory/4812-142-0x0000000000400000-0x000000000043A000-memory.dmp