Analysis
- max time kernel
143s - max time network
154s - platform
windows10-2004_x64 - resource
win10v2004-20230220-en - resource tags
- submitted
13/05/2023, 22:56
General
- Target PreAlertDebitNote.xlsx.exe
- Size 284KB
- Sample230513-2wtplacb4y
- SHA256 aa68121f50bc718bfec09a7a0686ad001d01a9cbe85f36849a649c4b6e55006d
Malware Config
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Loads dropped DLL 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.
- 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 1 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).
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\PreAlertDebitNote.xlsx.exe"C:\Users\Admin\AppData\Local\Temp\PreAlertDebitNote.xlsx.exe"1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\PreAlertDebitNote.xlsx.exe"C:\Users\Admin\AppData\Local\Temp\PreAlertDebitNote.xlsx.exe"2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
dsuecqh.dll
memory/1020-139-0x0000000000400000-0x0000000000441000-memory.dmp
memory/1020-140-0x0000000000400000-0x0000000000441000-memory.dmp
memory/1020-141-0x0000000000400000-0x0000000000441000-memory.dmp
memory/1020-142-0x0000000000400000-0x0000000000441000-memory.dmp
memory/1020-143-0x0000000004840000-0x0000000004DE4000-memory.dmp
memory/1020-144-0x0000000004E50000-0x0000000004EB6000-memory.dmp
memory/1020-145-0x00000000021C0000-0x00000000021D0000-memory.dmp
memory/1020-146-0x00000000021C0000-0x00000000021D0000-memory.dmp
memory/1020-147-0x00000000021C0000-0x00000000021D0000-memory.dmp
memory/1020-148-0x00000000021C0000-0x00000000021D0000-memory.dmp
memory/1020-150-0x00000000021C0000-0x00000000021D0000-memory.dmp
memory/1020-151-0x00000000021C0000-0x00000000021D0000-memory.dmp
memory/1020-152-0x00000000021C0000-0x00000000021D0000-memory.dmp
memory/1020-153-0x00000000021C0000-0x00000000021D0000-memory.dmp
memory/1020-154-0x0000000005CE0000-0x0000000005D72000-memory.dmp
memory/1020-155-0x0000000005DC0000-0x0000000005DCA000-memory.dmp
memory/1020-156-0x0000000005E50000-0x0000000005EA0000-memory.dmp
memory/1020-157-0x0000000006010000-0x00000000061D2000-memory.dmp