Analysis
- max time kernel
49s - max time network
148s - platform
windows7_x64 - resource
win7-20221111-en - resource tags
- submitted
16/02/2023, 12:16
General
- Target Proforma invoice.exe
- Size 633KB
- Sample230216-pffrkshb21
- SHA256 71d07c6a2d2c936d68d34be26e8db95e47a616d30521f128feb2e79fbbaff469
Malware Config
Extracted
-
Protocol
smtp
-
Host
mail.ljmaintenancesvcs.com.sg
-
Port
587
-
Username
-
Password
Steven@12345
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.ljmaintenancesvcs.com.sg
-
Port
587
-
Username
-
Password
Steven@12345
-
Email to
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- 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.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- 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 1 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 13 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Proforma invoice.exe"C:\Users\Admin\AppData\Local\Temp\Proforma invoice.exe"1⤵
- 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\jIUXhaqkr" /XML "C:\Users\Admin\AppData\Local\Temp\tmp76B7.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\Proforma invoice.exe"{path}"2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
tmp76B7.tmp
memory/840-57-0x00000000053A0000-0x000000000541A000-memory.dmp
memory/840-56-0x00000000006D0000-0x00000000006DE000-memory.dmp
memory/840-54-0x0000000000080000-0x0000000000124000-memory.dmp
memory/840-58-0x0000000001F60000-0x0000000001F90000-memory.dmp
memory/840-55-0x0000000075A91000-0x0000000075A93000-memory.dmp
memory/1672-62-0x0000000000400000-0x0000000000430000-memory.dmp
memory/1672-61-0x0000000000400000-0x0000000000430000-memory.dmp
memory/1672-64-0x0000000000400000-0x0000000000430000-memory.dmp
memory/1672-65-0x0000000000400000-0x0000000000430000-memory.dmp
memory/1672-66-0x0000000000400000-0x0000000000430000-memory.dmp
memory/1672-69-0x0000000000400000-0x0000000000430000-memory.dmp
memory/1672-71-0x0000000000400000-0x0000000000430000-memory.dmp