Analysis
- max time kernel
87s - max time network
33s - platform
windows7_x64 - resource
win7-20221111-en - resource tags
- submitted
11/01/2023, 06:53
General
- Target Loonstrookje_pdf.exe
- Size 677KB
- Sample230111-hnmrjaef21
- SHA256 6a26956eba797e670a0bdfc1cd54d634b2aa06a922e91a2896ea548ca784abe7
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
smtp.huiijingco.com
-
Port
587
-
Username
-
Password
lNLUrZT2
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla payload 6 IoCs
- Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
- Looks for VMWare Tools registry key 2 TTPs 1 IoCs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- 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 3 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 13 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Loonstrookje_pdf.exe"C:\Users\Admin\AppData\Local\Temp\Loonstrookje_pdf.exe"1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- 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\Loonstrookje_pdf.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Users\Admin\AppData\Local\Temp\Loonstrookje_pdf.exe"C:\Users\Admin\AppData\Local\Temp\Loonstrookje_pdf.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/268-74-0x000000006F910000-0x000000006FEBB000-memory.dmp
memory/268-73-0x000000006F910000-0x000000006FEBB000-memory.dmp
memory/1364-67-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1364-66-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1364-72-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1364-70-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1364-62-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1364-63-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1364-65-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1616-58-0x0000000005390000-0x0000000005406000-memory.dmp
memory/1616-54-0x0000000001390000-0x000000000143E000-memory.dmp
memory/1616-61-0x0000000000FC0000-0x0000000000FFE000-memory.dmp
memory/1616-57-0x0000000000540000-0x000000000054A000-memory.dmp
memory/1616-56-0x0000000000530000-0x0000000000546000-memory.dmp
memory/1616-55-0x0000000075C81000-0x0000000075C83000-memory.dmp