Analysis
- max time kernel
137s - max time network
141s - platform
windows10-2004_x64 - resource
win10v2004-en-20220113 - submitted
05/04/2022, 10:45
General
- Target 88000000027160022_07019STC.exe
- Size 849KB
- Sample220405-mtdg9sdee2
- SHA256 783a0ab9ef1ce64fb9390ad9906cdeed76cf978b36c0f5eedbc9e2b18a0ad8da
Malware Config
Extracted
-
agenttesla
-
https://api.telegram.org/bot2124462934:AAGr-L06waDdFGpnKJz3_DCOFcJpWDQ7WIM/sendDocument
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 1 IoCs
- Looks for VirtualBox Guest Additions in registry 2 TTPs
- Drops file in Drivers directory 1 IoCs
- Looks for VMWare Tools registry key 2 TTPs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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
- Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
- 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 6 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\88000000027160022_07019STC.exe"C:\Users\Admin\AppData\Local\Temp\88000000027160022_07019STC.exe"1⤵
- Checks BIOS information in registry
- Checks computer location settings
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\88000000027160022_07019STC.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Users\Admin\AppData\Local\Temp\88000000027160022_07019STC.exe"C:\Users\Admin\AppData\Local\Temp\88000000027160022_07019STC.exe"2⤵
-
-
C:\Users\Admin\AppData\Local\Temp\88000000027160022_07019STC.exe"C:\Users\Admin\AppData\Local\Temp\88000000027160022_07019STC.exe"2⤵
- Drops file in Drivers directory
- Accesses Microsoft Outlook profiles
- 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
memory/368-151-0x0000000006770000-0x000000000678E000-memory.dmp
memory/368-157-0x0000000007820000-0x000000000783A000-memory.dmp
memory/368-158-0x0000000007800000-0x0000000007808000-memory.dmp
memory/368-146-0x0000000005B00000-0x0000000005B66000-memory.dmp
memory/368-156-0x0000000007710000-0x000000000771E000-memory.dmp
memory/368-155-0x0000000007760000-0x00000000077F6000-memory.dmp
memory/368-140-0x00000000028C0000-0x00000000028F6000-memory.dmp
memory/368-141-0x0000000005320000-0x0000000005948000-memory.dmp
memory/368-154-0x0000000007550000-0x000000000755A000-memory.dmp
memory/368-143-0x0000000005220000-0x0000000005242000-memory.dmp
memory/368-147-0x00000000061D0000-0x00000000061EE000-memory.dmp
memory/368-153-0x00000000074E0000-0x00000000074FA000-memory.dmp
memory/368-152-0x0000000007B40000-0x00000000081BA000-memory.dmp
memory/368-150-0x0000000074DD0000-0x0000000074E1C000-memory.dmp
memory/368-148-0x0000000002860000-0x0000000002870000-memory.dmp
memory/368-149-0x0000000006790000-0x00000000067C2000-memory.dmp
memory/2864-145-0x0000000000400000-0x000000000043C000-memory.dmp
memory/2864-159-0x00000000061C0000-0x0000000006210000-memory.dmp
memory/4020-133-0x0000000000310000-0x00000000003EA000-memory.dmp
memory/4020-134-0x0000000005430000-0x00000000059D4000-memory.dmp
memory/4020-138-0x0000000008C80000-0x0000000008CE6000-memory.dmp
memory/4020-137-0x00000000089C0000-0x0000000008A5C000-memory.dmp
memory/4020-136-0x0000000004E40000-0x0000000004E4A000-memory.dmp
memory/4020-135-0x0000000004DA0000-0x0000000004E32000-memory.dmp