Analysis
- max time kernel
91s - max time network
146s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
27/10/2022, 15:18
General
- Target Proforma invoices.exe
- Size 1.1MB
- Sample221027-splkzacef5
- SHA256 202e4676713e980f9bef2b8b87f34f90cdd2dff657920e928e550eab3d745b58
Malware Config
Extracted
-
agenttesla
-
https://api.telegram.org/bot1507062795:AAEBb0H5OYbp-dWwXk8ffQp0InjOhKxhpbU/
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.
- 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 4 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Proforma invoices.exe"C:\Users\Admin\AppData\Local\Temp\Proforma invoices.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BtFKvjRVUy" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD805.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"{path}"2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
tmpD805.tmp
memory/4188-140-0x0000000000400000-0x000000000043C000-memory.dmp
memory/4188-141-0x0000000005E30000-0x0000000005E96000-memory.dmp
memory/4188-142-0x0000000006240000-0x0000000006290000-memory.dmp
memory/4724-132-0x00000000004E0000-0x00000000005F4000-memory.dmp
memory/4724-133-0x00000000055C0000-0x0000000005B64000-memory.dmp
memory/4724-134-0x0000000005010000-0x00000000050A2000-memory.dmp
memory/4724-135-0x00000000050B0000-0x000000000514C000-memory.dmp
memory/4724-136-0x0000000004F80000-0x0000000004F8A000-memory.dmp