Analysis
- max time kernel
154s - max time network
162s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
19/12/2023, 15:28
General
- Target Hareketleri-Bilgilendirmesi_PDF.exe
- Size 184KB
- Sample231219-swbpcagbc8
- SHA256 a54dc3390eaea1e86acdbc8abe74af7f4cda5f579f8ecc3182f314427fab0658
Malware Config
Extracted
-
Protocol
ftp
-
Host
ftp.aksumer.com
-
Port
21
-
Username
aksumerc
-
Password
211116.kS*-
Extracted
-
agenttesla
-
Protocol
ftp
-
Host
ftp://ftp.aksumer.com
-
Port
21
-
Username
aksumerc
-
Password
211116.kS*-
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 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.
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Hareketleri-Bilgilendirmesi_PDF.exe"C:\Users\Admin\AppData\Local\Temp\Hareketleri-Bilgilendirmesi_PDF.exe"1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\RegAAsm.exe"C:\Users\Admin\AppData\Local\Temp\RegAAsm.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
RegAAsm.exe
memory/1444-0-0x00000000007D0000-0x0000000000802000-memory.dmp
memory/1444-1-0x00007FFCD1C20000-0x00007FFCD26E1000-memory.dmp
memory/1444-2-0x000000001C320000-0x000000001C330000-memory.dmp
memory/1444-15-0x00007FFCD1C20000-0x00007FFCD26E1000-memory.dmp
memory/4896-19-0x00000000748F0000-0x00000000750A0000-memory.dmp
memory/4896-17-0x00000000008E0000-0x0000000000922000-memory.dmp
memory/4896-18-0x0000000005980000-0x0000000005F24000-memory.dmp
memory/4896-16-0x00000000748F0000-0x00000000750A0000-memory.dmp
memory/4896-20-0x00000000055C0000-0x00000000055D0000-memory.dmp
memory/4896-21-0x00000000054D0000-0x0000000005536000-memory.dmp
memory/4896-22-0x00000000055C0000-0x00000000055D0000-memory.dmp
memory/4896-23-0x0000000006870000-0x00000000068C0000-memory.dmp
memory/4896-24-0x0000000006960000-0x00000000069FC000-memory.dmp
memory/4896-25-0x0000000006AA0000-0x0000000006B32000-memory.dmp
memory/4896-26-0x0000000006A20000-0x0000000006A2A000-memory.dmp