Analysis
- max time kernel
124s - max time network
126s - platform
windows10_x64 - resource
win10v20201028 - submitted
09/11/2020, 20:18
General
- Target copia del recibo 000201106012020.exe
- Size 492KB
- Sample201109-t73nxpdcge
- SHA256 1ea72043598a1a8eea973a2bdc0f20c2291c1b5da34b04c3a7bc32d6b70e7863
Malware Config
Extracted
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Protocol
smtp
-
Host
mail.ductoslimpios.com.mx
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Port
587
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Username
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Password
Nhost+321
Extracted
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agenttesla
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Protocol
smtp
-
Host
mail.ductoslimpios.com.mx
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Port
587
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Username
-
Password
Nhost+321
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- CoreEntity .NET Packer 1 IoCs
A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.
- AgentTesla Payload 2 IoCs
- rezer0 1 IoCs
Detects ReZer0, a packer with multiple versions used in various campaigns.
- 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.
- 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 3 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\copia del recibo 000201106012020.exe"C:\Users\Admin\AppData\Local\Temp\copia del recibo 000201106012020.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BIktxF" /XML "C:\Users\Admin\AppData\Local\Temp\tmp817A.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\copia del recibo 000201106012020.exe"{path}"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\netsh.exe"netsh" wlan show profile3⤵
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
memory/2268-1-0x0000000000920000-0x0000000000921000-memory.dmp
memory/2268-3-0x00000000075F0000-0x000000000764D000-memory.dmp
memory/2268-4-0x0000000004CA0000-0x0000000004CA2000-memory.dmp
memory/2268-5-0x00000000096F0000-0x00000000096F1000-memory.dmp
memory/2268-6-0x0000000005760000-0x00000000057B3000-memory.dmp
memory/2268-7-0x0000000005860000-0x0000000005861000-memory.dmp
memory/2268-8-0x0000000005E00000-0x0000000005E01000-memory.dmp
memory/2268-0-0x0000000073FB0000-0x000000007469E000-memory.dmp
memory/3972-13-0x0000000073FB0000-0x000000007469E000-memory.dmp
memory/3972-18-0x00000000051D0000-0x00000000051D1000-memory.dmp
memory/3972-19-0x0000000005450000-0x0000000005451000-memory.dmp
memory/3972-11-0x0000000000400000-0x0000000000452000-memory.dmp
memory/3972-22-0x0000000006400000-0x0000000006401000-memory.dmp