Analysis
- max time kernel
73s - max time network
82s - platform
windows7_x64 - resource
win7-20220414-en - submitted
12/05/2022, 10:31
General
- Target Signed_document.exe
- Size 557KB
- Sample220512-mkc55sehgm
- SHA256 ebdbd8487dfdaebc34214de4e2f6fdfc5b5cfb30b9fa98ca9269a4cfae16cb93
Malware Config
Extracted
-
Protocol
smtp
-
Host
webmail.wrcs.in
-
Port
587
-
Username
-
Password
Sales@0006
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
webmail.wrcs.in
-
Port
587
-
Username
-
Password
Sales@0006
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- suricata: ET MALWARE AgentTesla Exfil Via SMTP
suricata: ET MALWARE AgentTesla Exfil Via SMTP
- 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
- 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 5 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Signed_document.exe"C:\Users\Admin\AppData\Local\Temp\Signed_document.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- 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\Roaming\SrzBThDELWdXq.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\SrzBThDELWdXq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp120B.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\Signed_document.exe"C:\Users\Admin\AppData\Local\Temp\Signed_document.exe"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
tmp120B.tmp
memory/1000-55-0x0000000075F21000-0x0000000075F23000-memory.dmp
memory/1000-56-0x0000000000310000-0x0000000000318000-memory.dmp
memory/1000-57-0x0000000005030000-0x00000000050BC000-memory.dmp
memory/1000-62-0x00000000043E0000-0x000000000441A000-memory.dmp
memory/1000-54-0x0000000000C20000-0x0000000000CB2000-memory.dmp
memory/1140-75-0x0000000073470000-0x0000000073A1B000-memory.dmp
memory/1692-63-0x0000000000400000-0x000000000043A000-memory.dmp
memory/1692-66-0x0000000000400000-0x000000000043A000-memory.dmp
memory/1692-67-0x0000000000400000-0x000000000043A000-memory.dmp
memory/1692-68-0x0000000000400000-0x000000000043A000-memory.dmp
memory/1692-71-0x0000000000400000-0x000000000043A000-memory.dmp
memory/1692-73-0x0000000000400000-0x000000000043A000-memory.dmp
memory/1692-64-0x0000000000400000-0x000000000043A000-memory.dmp