Analysis
- max time kernel
151s - max time network
152s - platform
windows10_x64 - resource
win10v200722 - submitted
16/10/2020, 14:28
General
- Target 3aff71a139f4a5201d81b00a4a1d17c4.exe
- Size 570KB
- Sample201016-lsk3qbfetj
- SHA256 d9029ab42ac205dc948b7d7d03010db9bc5c9a1893bd72bb0970a82751e2f047
Malware Config
Extracted
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agenttesla
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Protocol
smtp
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Host
smtp.kamazfs.biz
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Port
587
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Username
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Password
f*wqZyd1
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 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 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: MapViewOfSection 5 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 20 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\3aff71a139f4a5201d81b00a4a1d17c4.exe"C:\Users\Admin\AppData\Local\Temp\3aff71a139f4a5201d81b00a4a1d17c4.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\Temp\3aff71a139f4a5201d81b00a4a1d17c4.exe"C:\Users\Admin\AppData\Local\Temp\3aff71a139f4a5201d81b00a4a1d17c4.exe"2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"3⤵
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"3⤵
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"3⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/3560-33-0x0000000006930000-0x0000000006931000-memory.dmp
memory/3560-31-0x0000000006280000-0x0000000006281000-memory.dmp
memory/3560-30-0x0000000005A00000-0x0000000005A01000-memory.dmp
memory/3560-25-0x00000000738E0000-0x0000000073FCE000-memory.dmp
memory/3816-6-0x00000000057A0000-0x00000000057DC000-memory.dmp
memory/3816-0-0x00000000738E0000-0x0000000073FCE000-memory.dmp
memory/3816-4-0x00000000057E0000-0x000000000581E000-memory.dmp
memory/3816-3-0x00000000052E0000-0x00000000052E1000-memory.dmp
memory/3816-1-0x00000000009D0000-0x00000000009D1000-memory.dmp
memory/3844-9-0x00000000738E0000-0x0000000073FCE000-memory.dmp
memory/3844-12-0x0000000005A20000-0x0000000005A21000-memory.dmp
memory/3844-13-0x00000000056A0000-0x00000000056A1000-memory.dmp
memory/3844-7-0x0000000000400000-0x000000000043C000-memory.dmp
memory/3988-15-0x00000000738E0000-0x0000000073FCE000-memory.dmp