Analysis
- max time kernel
47s - max time network
46s - platform
windows7_x64 - resource
win7-20230220-en - resource tags
- submitted
18/04/2023, 10:45
General
- Target Bestar Steel RFQ 0100423(MECH)NBI April-1423.exe
- Size 743KB
- Sample230418-mtds2aah54
- SHA256 856c8bb75c2b8c79b99f9249c201d20838251a94a4f830afa7995a3af0952842
Malware Config
Extracted
-
agenttesla
-
https://api.telegram.org/bot5409839916:AAEYUYZy0IhJQAm4VXi620si4okGW8FDL2w/
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- 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.
- 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.
- 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 3 IoCs
- Suspicious behavior: RenamesItself 1 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 13 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Bestar Steel RFQ 0100423(MECH)NBI April-1423.exe"C:\Users\Admin\AppData\Local\Temp\Bestar Steel RFQ 0100423(MECH)NBI April-1423.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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mDCsLcbtJNBW" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7521.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\Bestar Steel RFQ 0100423(MECH)NBI April-1423.exe"{path}"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
tmp7521.tmp
memory/788-68-0x0000000000400000-0x000000000043A000-memory.dmp
memory/788-67-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/788-77-0x0000000000710000-0x0000000000750000-memory.dmp
memory/788-73-0x0000000000710000-0x0000000000750000-memory.dmp
memory/788-72-0x0000000000400000-0x000000000043A000-memory.dmp
memory/788-70-0x0000000000400000-0x000000000043A000-memory.dmp
memory/788-63-0x0000000000400000-0x000000000043A000-memory.dmp
memory/788-65-0x0000000000400000-0x000000000043A000-memory.dmp
memory/788-66-0x0000000000400000-0x000000000043A000-memory.dmp
memory/788-64-0x0000000000400000-0x000000000043A000-memory.dmp
memory/1088-56-0x0000000000400000-0x000000000040C000-memory.dmp
memory/1088-54-0x0000000000940000-0x00000000009FE000-memory.dmp
memory/1088-55-0x0000000004D10000-0x0000000004D50000-memory.dmp
memory/1088-59-0x0000000000B80000-0x0000000000BBA000-memory.dmp
memory/1088-58-0x0000000004C90000-0x0000000004D14000-memory.dmp
memory/1088-57-0x0000000004D10000-0x0000000004D50000-memory.dmp