Analysis
- max time kernel
145s - max time network
148s - platform
windows10_x64 - resource
win10v20201028 - submitted
25/01/2021, 14:33
General
- Target Top Urgent_New_Order_PDF.exe
- Size 911KB
- Sample210125-ept2tp28pe
- SHA256 ec51e50ebea3906ef87c852c95b256e3948a9bb789981a9dd1fe673d78663e66
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
webmail.rcsqatar.com
-
Port
587
-
Username
-
Password
Ascent@2019
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 2 IoCs
- Looks for VirtualBox Guest Additions in registry 2 TTPs
- 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.
- 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.
- 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 2 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Top Urgent_New_Order_PDF.exe"C:\Users\Admin\AppData\Local\Temp\Top Urgent_New_Order_PDF.exe"1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mPwwUYOq" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBCDD.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\Top Urgent_New_Order_PDF.exe"{path}"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/1908-11-0x0000000005E60000-0x0000000005EE7000-memory.dmp
memory/1908-12-0x0000000006060000-0x0000000006061000-memory.dmp
memory/1908-7-0x0000000005160000-0x0000000005161000-memory.dmp
memory/1908-8-0x0000000005200000-0x000000000520E000-memory.dmp
memory/1908-9-0x0000000005320000-0x0000000005321000-memory.dmp
memory/1908-10-0x0000000005270000-0x0000000005271000-memory.dmp
memory/1908-2-0x0000000073920000-0x000000007400E000-memory.dmp
memory/1908-6-0x0000000005090000-0x0000000005091000-memory.dmp
memory/1908-3-0x00000000006E0000-0x00000000006E1000-memory.dmp
memory/1908-5-0x0000000005590000-0x0000000005591000-memory.dmp
memory/3484-15-0x0000000000400000-0x000000000043C000-memory.dmp
memory/3484-18-0x0000000073920000-0x000000007400E000-memory.dmp
memory/3484-23-0x0000000005470000-0x0000000005471000-memory.dmp
memory/3484-24-0x0000000005500000-0x0000000005501000-memory.dmp