Analysis
- max time kernel
70s - max time network
143s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
22/04/2022, 01:18
General
- Target Enquiry.exe
- Size 530KB
- Sample220422-bnyepsacd5
- SHA256 b549e8a31eda42d162c7f60d9ba4b8e0b740994f69bd62d6cca8ac2b18faf166
Malware Config
Extracted
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Protocol
smtp
-
Host
mail.teknovateplas.com
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Port
587
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Username
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Password
tekmktg2020$
Extracted
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agenttesla
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Protocol
smtp
-
Host
mail.teknovateplas.com
-
Port
587
-
Username
-
Password
tekmktg2020$
-
Email to
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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
- 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 7 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Enquiry.exe"C:\Users\Admin\AppData\Local\Temp\Enquiry.exe"1⤵
- Checks computer location settings
- 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\OyPLYU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD7C7.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Enquiry.exe"{path}"2⤵
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C:\Users\Admin\AppData\Local\Temp\Enquiry.exe"{path}"2⤵
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C:\Users\Admin\AppData\Local\Temp\Enquiry.exe"{path}"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
tmpD7C7.tmp
memory/4280-133-0x0000000005030000-0x00000000050CC000-memory.dmp
memory/4280-130-0x00000000004C0000-0x000000000054A000-memory.dmp
memory/4280-134-0x0000000004F90000-0x0000000004F9A000-memory.dmp
memory/4280-132-0x0000000004EF0000-0x0000000004F82000-memory.dmp
memory/4280-131-0x00000000053A0000-0x0000000005944000-memory.dmp
memory/4840-140-0x0000000000400000-0x000000000043A000-memory.dmp
memory/4840-141-0x0000000006370000-0x00000000063D6000-memory.dmp
memory/4840-142-0x0000000006920000-0x0000000006970000-memory.dmp