Analysis
- max time kernel
147s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20230703-en - resource tags
- submitted
06/07/2023, 06:20
General
- Target UPSCBJ1901700131.pdf.exe
- Size 893KB
- Sample230706-g3tyqaag3s
- SHA256 abe4e9779d399b488d7faf17febacdec241eda6ea49ee4f2c2f707876f4737d7
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
sh003.webhostbox.net
-
Port
587
-
Username
-
Password
blessing2023
-
Email to
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
- Looks for VMWare Tools registry key 2 TTPs 1 IoCs
- 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
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- 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).
- 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 WriteProcessMemory 11 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\UPSCBJ1901700131.pdf.exe"C:\Users\Admin\AppData\Local\Temp\UPSCBJ1901700131.pdf.exe"1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- 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\YjUGKESb" /XML "C:\Users\Admin\AppData\Local\Temp\tmp28EF.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\UPSCBJ1901700131.pdf.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
Loading Replay Monitor...
Downloads
UPSCBJ1901700131.pdf.exe.log
tmp28EF.tmp
memory/2688-139-0x00000000057A0000-0x00000000057B0000-memory.dmp
memory/2688-136-0x00000000058A0000-0x000000000593C000-memory.dmp
memory/2688-137-0x00000000057F0000-0x00000000057FA000-memory.dmp
memory/2688-138-0x00000000057A0000-0x00000000057B0000-memory.dmp
memory/2688-133-0x0000000000EA0000-0x0000000000F86000-memory.dmp
memory/2688-140-0x0000000008C40000-0x0000000008CA6000-memory.dmp
memory/2688-135-0x0000000005800000-0x0000000005892000-memory.dmp
memory/2688-134-0x0000000005D10000-0x00000000062B4000-memory.dmp
memory/4980-144-0x0000000000400000-0x0000000000430000-memory.dmp
memory/4980-147-0x0000000005120000-0x0000000005130000-memory.dmp
memory/4980-148-0x0000000006930000-0x0000000006980000-memory.dmp
memory/4980-149-0x0000000006B50000-0x0000000006D12000-memory.dmp
memory/4980-150-0x0000000005120000-0x0000000005130000-memory.dmp