Analysis
- max time kernel
147s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-en-20220113 - submitted
28/03/2022, 21:06
General
- Target DEBIT NOTE.exe
- Size 558KB
- Sample220328-zxp2pabcbl
- SHA256 63c91fa1eade0720aaaafadc134c2ccaa9e541b444fbd2a8d33f446d2761bc77
Malware Config
Extracted
-
agenttesla
-
https://api.telegram.org/bot1562684159:AAF0RHsedAMUFPfvPk6IyrreCEPxQ_b3Y3g/sendDocument
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 1 IoCs
- 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.
- 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
- 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
- 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 4 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\DEBIT NOTE.exe"C:\Users\Admin\AppData\Local\Temp\DEBIT NOTE.exe"1⤵
- Checks BIOS information in registry
- Checks computer location settings
- Maps connected drives based on registry
- 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\dBhKzJp" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA49A.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\DEBIT NOTE.exe"{path}"2⤵
-
-
C:\Users\Admin\AppData\Local\Temp\DEBIT NOTE.exe"{path}"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
DEBIT NOTE.exe.log
tmpA49A.tmp
memory/1264-136-0x000000000DD60000-0x000000000DDC6000-memory.dmp
memory/1264-133-0x0000000004C80000-0x0000000004D12000-memory.dmp
memory/1264-134-0x0000000004BB0000-0x0000000004BBA000-memory.dmp
memory/1264-135-0x0000000004D80000-0x0000000004DD6000-memory.dmp
memory/1264-130-0x0000000000170000-0x0000000000202000-memory.dmp
memory/1264-132-0x0000000005230000-0x00000000057D4000-memory.dmp
memory/1264-131-0x0000000004BE0000-0x0000000004C7C000-memory.dmp
memory/4756-141-0x0000000000400000-0x000000000043C000-memory.dmp
memory/4756-143-0x00000000069D0000-0x0000000006A20000-memory.dmp