Analysis
- max time kernel
135s - max time network
137s - platform
windows10-2004_x64 - resource
win10v2004-20230220-en - resource tags
- submitted
20/04/2023, 09:18
General
- Target Payment slip.exe
- Size 650KB
- Sample230420-k9lsgagg74
- SHA256 7197cfed2cff1f8c3191d46ca165b089cd7d1d46ec91d5536a70da23b361c03d
Malware Config
Extracted
-
agenttesla
-
https://api.telegram.org/bot5818759233:AAFI7OlL_xF1C_H7nxAtSweMNNwegCdZOXs/
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
- 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 3 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Payment slip.exe"C:\Users\Admin\AppData\Local\Temp\Payment slip.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\NUDbDZmHrT" /XML "C:\Users\Admin\AppData\Local\Temp\tmpDC1C.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\Payment slip.exe"{path}"2⤵
-
-
C:\Users\Admin\AppData\Local\Temp\Payment slip.exe"{path}"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
Payment slip.exe.log
tmpDC1C.tmp
memory/228-143-0x0000000000400000-0x0000000000430000-memory.dmp
memory/228-150-0x00000000058C0000-0x00000000058D0000-memory.dmp
memory/228-149-0x0000000007720000-0x00000000078E2000-memory.dmp
memory/228-148-0x0000000007470000-0x00000000074C0000-memory.dmp
memory/228-147-0x00000000058C0000-0x00000000058D0000-memory.dmp
memory/228-146-0x00000000058D0000-0x0000000005936000-memory.dmp
memory/1888-136-0x0000000005B70000-0x0000000005C0C000-memory.dmp
memory/1888-139-0x0000000005D70000-0x0000000005D80000-memory.dmp
memory/1888-138-0x0000000005D70000-0x0000000005D80000-memory.dmp
memory/1888-137-0x0000000005C50000-0x0000000005C5A000-memory.dmp
memory/1888-133-0x0000000000FE0000-0x0000000001088000-memory.dmp
memory/1888-135-0x0000000005AD0000-0x0000000005B62000-memory.dmp
memory/1888-134-0x0000000006080000-0x0000000006624000-memory.dmp