Analysis
- max time kernel
121s - max time network
123s - platform
windows10_x64 - resource
win10-en-20211104 - submitted
15/11/2021, 08:37
General
- Target kjiun.vbs
- Size 1.2MB
- Sample211115-kh6cssefar
- SHA256 d3cf782e69e0d99f2de9f87db3a757f015850565a865bb34fa077cdd45da07b7
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.
- .NET Reactor proctector 1 IoCs
Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.
- AgentTesla Payload 3 IoCs
- Executes dropped EXE 2 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 2 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 11 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\kjiun.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 use of WriteProcessMemory
-
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
Loading Replay Monitor...
Downloads
memory/68-124-0x0000000005800000-0x0000000005801000-memory.dmp
memory/68-130-0x0000000008B10000-0x0000000008BC6000-memory.dmp
memory/68-125-0x0000000005300000-0x0000000005301000-memory.dmp
memory/68-126-0x0000000002BF0000-0x0000000002BF1000-memory.dmp
memory/68-127-0x0000000005460000-0x0000000005461000-memory.dmp
memory/68-128-0x00000000052E0000-0x00000000052EE000-memory.dmp
memory/68-129-0x0000000005300000-0x00000000057FE000-memory.dmp
memory/68-131-0x0000000008870000-0x00000000088E5000-memory.dmp
memory/68-121-0x0000000000710000-0x0000000000711000-memory.dmp
memory/68-123-0x0000000005160000-0x0000000005161000-memory.dmp
memory/1332-132-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1332-140-0x0000000004E30000-0x000000000532E000-memory.dmp
memory/1332-141-0x0000000005310000-0x0000000005311000-memory.dmp
memory/1332-142-0x0000000005AE0000-0x0000000005AE1000-memory.dmp