Analysis
- max time kernel
142s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20230915-en - resource tags
- submitted
27/09/2023, 05:54
General
- Target Proforma invoice from DPC 20230827 (CNY).xls.exe
- Size 698KB
- Sample230927-glwe8agc6x
- SHA256 ec35b0c10000f1cfcf5e667c474e1ab439dd9ef1f62a4732eae437b4c968a1cf
Malware Config
Extracted
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agenttesla
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Protocol
smtp
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Host
mail.frontierfulfillment.com.my
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Port
587
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Username
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Password
5_8B6kjVm
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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.
- 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 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 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
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C:\Users\Admin\AppData\Local\Temp\Proforma invoice from DPC 20230827 (CNY).xls.exe"C:\Users\Admin\AppData\Local\Temp\Proforma invoice from DPC 20230827 (CNY).xls.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
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\KUtdppEfd" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEACD.tmp"2⤵
- Creates scheduled task(s)
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"{path}"2⤵
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"{path}"2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Replay Monitor
Loading Replay Monitor...
Downloads
tmpEACD.tmp
memory/2472-12-0x0000000006F50000-0x0000000006FB6000-memory.dmp
memory/2472-9-0x0000000005D10000-0x0000000005D1C000-memory.dmp
memory/2472-3-0x0000000005DD0000-0x0000000006374000-memory.dmp
memory/2472-4-0x00000000058C0000-0x0000000005952000-memory.dmp
memory/2472-5-0x0000000005A00000-0x0000000005A10000-memory.dmp
memory/2472-6-0x0000000005840000-0x000000000584A000-memory.dmp
memory/2472-7-0x0000000005960000-0x00000000059B6000-memory.dmp
memory/2472-13-0x0000000007130000-0x00000000071B0000-memory.dmp
memory/2472-0-0x0000000000D20000-0x0000000000DD4000-memory.dmp
memory/2472-10-0x0000000075190000-0x0000000075940000-memory.dmp
memory/2472-2-0x0000000005740000-0x00000000057DC000-memory.dmp
memory/2472-11-0x0000000005A00000-0x0000000005A10000-memory.dmp
memory/2472-8-0x0000000006380000-0x00000000066D4000-memory.dmp
memory/2472-14-0x0000000006FC0000-0x0000000007002000-memory.dmp
memory/2472-15-0x0000000007070000-0x00000000070D6000-memory.dmp
memory/2472-1-0x0000000075190000-0x0000000075940000-memory.dmp
memory/2472-22-0x0000000075190000-0x0000000075940000-memory.dmp
memory/4108-21-0x0000000075190000-0x0000000075940000-memory.dmp
memory/4108-19-0x0000000000400000-0x0000000000442000-memory.dmp
memory/4108-23-0x0000000005600000-0x0000000005610000-memory.dmp
memory/4108-25-0x0000000006C00000-0x0000000006C50000-memory.dmp
memory/4108-26-0x0000000075190000-0x0000000075940000-memory.dmp
memory/4108-27-0x0000000005600000-0x0000000005610000-memory.dmp