Analysis
- max time kernel
112s - max time network
114s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
25/04/2022, 10:57
General
- Target Xeroxscannerinvoice_pdf.exe
- Size 725KB
- Sample220425-m18xrabhe2
- SHA256 835a330ce5b6eee3abe4562fbc59bb83915a61ecf3141c8adb74e96aa9ab81bb
Malware Config
Extracted
-
agenttesla
-
https://api.telegram.org/bot5225585806:AAEkRG_DCi6c3Vpj9iXzTC4UbRlDhIqVhBU/sendDocument
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Looks for VirtualBox Guest Additions in registry 2 TTPs
- Looks for VMWare Tools registry key 2 TTPs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- 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
- Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
- Suspicious use of SetThreadContext 1 IoCs
- Suspicious behavior: EnumeratesProcesses 10 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Xeroxscannerinvoice_pdf.exe"C:\Users\Admin\AppData\Local\Temp\Xeroxscannerinvoice_pdf.exe"1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\Xeroxscannerinvoice_pdf.exe"C:\Users\Admin\AppData\Local\Temp\Xeroxscannerinvoice_pdf.exe"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/3116-130-0x00000000007C0000-0x000000000087C000-memory.dmp
memory/3116-131-0x0000000005980000-0x0000000005F24000-memory.dmp
memory/3116-132-0x00000000052A0000-0x0000000005332000-memory.dmp
memory/3116-133-0x00000000053D0000-0x000000000546C000-memory.dmp
memory/3116-134-0x00000000058C0000-0x0000000005926000-memory.dmp
memory/4216-136-0x0000000000400000-0x000000000043A000-memory.dmp
memory/4216-137-0x00000000068E0000-0x0000000006930000-memory.dmp
memory/4216-138-0x0000000007190000-0x000000000719A000-memory.dmp