Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
20/01/2023, 15:18
General
- Target invocie AL21-617.exe
- Size 985KB
- Sample230120-splkzaaf7s
- SHA256 bdbd71d973b24c1eac6df9a8056b6f0798bc515a3c0444ec63e50f274c1706cd
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.biateknos.com
-
Port
587
-
Username
-
Password
biateknossutinah
-
Email to
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
- 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.
- 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 8 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\invocie AL21-617.exe"C:\Users\Admin\AppData\Local\Temp\invocie AL21-617.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\AmWdClYhUnRlOp.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\AmWdClYhUnRlOp" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1C61.tmp"2⤵
- Creates scheduled task(s)
-
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C:\Users\Admin\AppData\Local\Temp\invocie AL21-617.exe"C:\Users\Admin\AppData\Local\Temp\invocie AL21-617.exe"2⤵
-
-
C:\Users\Admin\AppData\Local\Temp\invocie AL21-617.exe"C:\Users\Admin\AppData\Local\Temp\invocie AL21-617.exe"2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
invocie AL21-617.exe.log
tmp1C61.tmp
memory/1000-160-0x0000000006FC0000-0x0000000007010000-memory.dmp
memory/1000-144-0x0000000000400000-0x000000000043C000-memory.dmp
memory/3952-146-0x0000000005690000-0x00000000056B2000-memory.dmp
memory/3952-155-0x0000000007190000-0x000000000719A000-memory.dmp
memory/3952-142-0x0000000004FB0000-0x00000000055D8000-memory.dmp
memory/3952-159-0x0000000007440000-0x0000000007448000-memory.dmp
memory/3952-158-0x0000000007460000-0x000000000747A000-memory.dmp
memory/3952-157-0x0000000007350000-0x000000000735E000-memory.dmp
memory/3952-156-0x00000000073A0000-0x0000000007436000-memory.dmp
memory/3952-147-0x0000000005730000-0x0000000005796000-memory.dmp
memory/3952-148-0x0000000005810000-0x0000000005876000-memory.dmp
memory/3952-149-0x0000000005E00000-0x0000000005E1E000-memory.dmp
memory/3952-150-0x00000000063E0000-0x0000000006412000-memory.dmp
memory/3952-151-0x0000000070F70000-0x0000000070FBC000-memory.dmp
memory/3952-152-0x0000000006FD0000-0x0000000006FEE000-memory.dmp
memory/3952-153-0x0000000007760000-0x0000000007DDA000-memory.dmp
memory/3952-154-0x0000000007120000-0x000000000713A000-memory.dmp
memory/3952-139-0x0000000004870000-0x00000000048A6000-memory.dmp
memory/4896-132-0x0000000000470000-0x000000000056C000-memory.dmp
memory/4896-134-0x0000000004F00000-0x0000000004F92000-memory.dmp
memory/4896-135-0x00000000050A0000-0x00000000050AA000-memory.dmp
memory/4896-136-0x0000000007360000-0x00000000073FC000-memory.dmp
memory/4896-133-0x00000000053B0000-0x0000000005954000-memory.dmp