Analysis
- max time kernel
95s - max time network
112s - platform
windows10_x64 - resource
win10v20201028 - submitted
02/11/2020, 16:43
General
- Target btl.exe
- Size 1.8MB
- Sample201102-3jfgp8jhca
- SHA256 8bad16db1bd40fbc6e6fa8a9a9efd9f3bf8e95dd83af238625ee3f1f1ff1950c
Malware Config
Extracted
-
agenttesla
-
https://api.telegram.org/bot1394541177:AAE6fCE2MaLuLyQ2uGkiqBzcYa6csPGwM5Q/sendDocument
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Modifies WinLogon for persistence 2 TTPs 1 IoCs
- AgentTesla Payload 2 IoCs
- Drops startup file 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.
- Adds Run key to start application 2 TTPs 2 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Program crash 1 IoCs
- Suspicious behavior: EnumeratesProcesses 19 IoCs
- Suspicious use of AdjustPrivilegeToken 5 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\btl.exe"C:\Users\Admin\AppData\Local\Temp\btl.exe"1⤵
- Modifies WinLogon for persistence
- Drops startup file
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\btl.exe"C:\Users\Admin\AppData\Local\Temp\btl.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 11162⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/2940-8-0x00000000733D0000-0x0000000073ABE000-memory.dmp
memory/2940-20-0x0000000005BE0000-0x0000000005BE1000-memory.dmp
memory/2940-19-0x0000000006A80000-0x0000000006A81000-memory.dmp
memory/2940-18-0x00000000063F0000-0x00000000063F1000-memory.dmp
memory/2940-17-0x0000000005860000-0x0000000005861000-memory.dmp
memory/2940-6-0x0000000000400000-0x0000000000440000-memory.dmp
memory/3160-4-0x0000000006010000-0x00000000060A5000-memory.dmp
memory/3160-5-0x00000000069A0000-0x00000000069A1000-memory.dmp
memory/3160-0-0x00000000733D0000-0x0000000073ABE000-memory.dmp
memory/3160-3-0x0000000004F70000-0x0000000004F71000-memory.dmp
memory/3160-1-0x00000000005E0000-0x00000000005E1000-memory.dmp
memory/3620-12-0x0000000004F80000-0x0000000004F81000-memory.dmp
memory/3620-16-0x00000000052C0000-0x00000000052C1000-memory.dmp