Analysis
- max time kernel
120s - max time network
122s - platform
windows10_x64 - resource
win10-en-20211104 - submitted
15/11/2021, 08:37
General
- Target szsdee.vbs
- Size 855KB
- Sample211115-kh6cssefbj
- SHA256 d194b99224979a3bfd29bb09bd91d52f7e231ac652545180c6dc69b4edd8d779
Malware Config
Extracted
-
agenttesla
-
https://api.telegram.org/bot2107727636:AAGtenJYFQWUHBz27lev7d_3slnNyCuUhxc/sendDocument
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 3 IoCs
- Executes dropped EXE 4 IoCs
- 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.
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\szsdee.vbs"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\anyname.exe"C:\Users\Admin\AppData\Local\Temp\anyname.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\anyname.exe"{path}"3⤵
- Executes dropped EXE
-
-
C:\Users\Admin\AppData\Local\Temp\anyname.exe"{path}"3⤵
- Executes dropped EXE
-
-
C:\Users\Admin\AppData\Local\Temp\anyname.exe"{path}"3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/60-144-0x0000000006590000-0x0000000006591000-memory.dmp
memory/60-143-0x00000000059F0000-0x00000000059F1000-memory.dmp
memory/60-142-0x00000000058A0000-0x0000000005D9E000-memory.dmp
memory/60-134-0x0000000000400000-0x000000000043C000-memory.dmp
memory/3996-124-0x00000000053F0000-0x00000000053F1000-memory.dmp
memory/3996-131-0x0000000009AF0000-0x0000000009B28000-memory.dmp
memory/3996-130-0x0000000007470000-0x00000000074F0000-memory.dmp
memory/3996-129-0x0000000004ED0000-0x0000000004EDE000-memory.dmp
memory/3996-128-0x0000000005050000-0x0000000005051000-memory.dmp
memory/3996-127-0x00000000027E0000-0x00000000027E1000-memory.dmp
memory/3996-126-0x0000000004E90000-0x0000000004E91000-memory.dmp
memory/3996-125-0x0000000004EF0000-0x0000000004EF1000-memory.dmp
memory/3996-123-0x0000000004D50000-0x0000000004D51000-memory.dmp
memory/3996-121-0x0000000000480000-0x0000000000481000-memory.dmp