Analysis
- max time kernel
115s - max time network
139s - platform
windows7_x64 - resource
win7-20220901-en - resource tags
- submitted
23/12/2022, 04:26
General
- Target Halkbank_Ekstre_20221222_073809_405251-PDF.exe
- Size 1.4MB
- Sample221223-e2ljvaba3x
- SHA256 5c3db7a9aefc84e986c525b61473a8a9cca36afa979935fb66cb34f32f7d204e
Malware Config
Extracted
-
agenttesla
-
https://api.telegram.org/bot5471845965:AAGz3YmV7VKz4xbC6JZYPs8qHf8J8palMmQ/
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Downloads MZ/PE file
- Executes dropped EXE 6 IoCs
- Loads dropped DLL 7 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
- 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 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 19 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 41 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20221222_073809_405251-PDF.exe"C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20221222_073809_405251-PDF.exe"1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\windows.exe"C:\Users\Admin\AppData\Local\Temp\windows.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\maoRbYnmvKNp.exe"3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\maoRbYnmvKNp" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD7AA.tmp"3⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\windows.exe"C:\Users\Admin\AppData\Local\Temp\windows.exe"3⤵
- Executes dropped EXE
-
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C:\Users\Admin\AppData\Local\Temp\windows.exe"C:\Users\Admin\AppData\Local\Temp\windows.exe"3⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\windows.exe"C:\Users\Admin\AppData\Local\Temp\windows.exe"3⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\windows.exe"C:\Users\Admin\AppData\Local\Temp\windows.exe"3⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\windows.exe"C:\Users\Admin\AppData\Local\Temp\windows.exe"3⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20221222_073809_405251-PDF.exe"C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20221222_073809_405251-PDF.exe"2⤵
- 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
tmpD7AA.tmp
windows.exe
windows.exe
windows.exe
windows.exe
windows.exe
windows.exe
windows.exe
windows.exe
windows.exe
windows.exe
windows.exe
windows.exe
windows.exe
windows.exe
memory/864-84-0x00000000051D0000-0x000000000521A000-memory.dmp
memory/864-79-0x0000000005040000-0x00000000050C4000-memory.dmp
memory/864-65-0x00000000003D0000-0x00000000004EC000-memory.dmp
memory/1184-57-0x0000000000380000-0x000000000038A000-memory.dmp
memory/1184-64-0x0000000000E10000-0x0000000000E48000-memory.dmp
memory/1184-55-0x0000000075A11000-0x0000000075A13000-memory.dmp
memory/1184-56-0x0000000000340000-0x0000000000350000-memory.dmp
memory/1184-54-0x0000000001180000-0x00000000012F0000-memory.dmp
memory/1184-58-0x0000000005490000-0x0000000005502000-memory.dmp
memory/1572-96-0x000000006E880000-0x000000006EE2B000-memory.dmp
memory/1572-95-0x000000006E880000-0x000000006EE2B000-memory.dmp
memory/1764-67-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1764-68-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1764-77-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1764-70-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1764-72-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1764-71-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1764-75-0x0000000000400000-0x0000000000438000-memory.dmp