agenttesla | e63af0727fc8f4249a386eb98dba8e0d97f41d3ae5076c563c1629ab9e8b9f77

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	WScript.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
16	api.ipify.org
17	api.ipify.org

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\%AppData%\Microsoft\Windows\Start Menu\Programs\Windows PowerShell\Windows PowerShell.lnk	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3172 set thread context of 4240	3172	powershell.exe	91

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	wermgr.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	wermgr.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	wermgr.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	wermgr.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	wermgr.exe

Script User-Agent 1 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	1	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
3172	powershell.exe
3172	powershell.exe
3172	powershell.exe
4240	MSBuild.exe
4240	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3172	powershell.exe
Token: SeDebugPrivilege	4240	MSBuild.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2640 wrote to memory of 3172	2640	WScript.exe	88
PID 2640 wrote to memory of 3172	2640	WScript.exe	88
PID 3172 wrote to memory of 4240	3172	powershell.exe	91
PID 3172 wrote to memory of 4240	3172	powershell.exe	91
PID 3172 wrote to memory of 4240	3172	powershell.exe	91
PID 3172 wrote to memory of 4240	3172	powershell.exe	91
PID 3172 wrote to memory of 4240	3172	powershell.exe	91
PID 3172 wrote to memory of 4240	3172	powershell.exe	91
PID 3172 wrote to memory of 4240	3172	powershell.exe	91
PID 3172 wrote to memory of 4240	3172	powershell.exe	91
PID 3172 wrote to memory of 4464	3172	powershell.exe	92
PID 3172 wrote to memory of 4464	3172	powershell.exe	92

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\DOC- 1000290099433.vbe"
1⤵
- Blocklisted process makes network request
PID:4112

C:\Windows\System32\WScript.exe
C:\Windows\System32\WScript.exe "C:\Users\Admin\AppData\Roaming\CeKsDwHNOyLUtGz.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2640
- C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3172
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4240
- - C:\Windows\system32\wermgr.exe
    "C:\Windows\system32\wermgr.exe" "-outproc" "0" "3172" "2716" "2656" "2720" "0" "0" "2724" "0" "0" "0" "0" "0"
    3⤵
    - Checks processor information in registry
    - Enumerates system info in registry
    PID:4464

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Discovery

Query Registry

4

System Information Discovery

4

System Location Discovery

T1614

System Language Discovery