agenttesla | c46ee625d9626c6583f1129a66c6044d50ae10ba95fec689e13646a0278afbe0

System Information Discovery

Processes:

Packing.scr

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Packing.scr
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Packing.scr

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

Processes:

Packing.scr

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	Packing.scr

Maps connected drives based on registry 3 TTPs 2 IoCs

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

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

Processes:

Packing.scr

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Packing.scr
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	Packing.scr

Suspicious use of SetThreadContext 1 IoCs

Processes:

Packing.scr

description pid process target process

PID 3652 set thread context of 452 3652 Packing.scr MSBuild.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1960 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

MSBuild.exe

pid process

452 MSBuild.exe
452 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

MSBuild.exe

description pid process

Token: SeDebugPrivilege 452 MSBuild.exe

description	pid	process	target process
PID 3652 set thread context of 452	3652	Packing.scr	MSBuild.exe

pid	process
1960	schtasks.exe

pid	process
452	MSBuild.exe
452	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	452	MSBuild.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

Packing.scr

description	pid	process	target process
PID 3652 wrote to memory of 1960	3652	Packing.scr	schtasks.exe
PID 3652 wrote to memory of 1960	3652	Packing.scr	schtasks.exe
PID 3652 wrote to memory of 1960	3652	Packing.scr	schtasks.exe
PID 3652 wrote to memory of 452	3652	Packing.scr	MSBuild.exe
PID 3652 wrote to memory of 452	3652	Packing.scr	MSBuild.exe
PID 3652 wrote to memory of 452	3652	Packing.scr	MSBuild.exe
PID 3652 wrote to memory of 452	3652	Packing.scr	MSBuild.exe
PID 3652 wrote to memory of 452	3652	Packing.scr	MSBuild.exe
PID 3652 wrote to memory of 452	3652	Packing.scr	MSBuild.exe
PID 3652 wrote to memory of 452	3652	Packing.scr	MSBuild.exe
PID 3652 wrote to memory of 452	3652	Packing.scr	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\Packing.scr
"C:\Users\Admin\AppData\Local\Temp\Packing.scr" /S
1⤵
- Checks BIOS information in registry
- Checks computer location settings
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3652

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vzlcamQxGCgKJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp13E1.tmp"
2⤵
- Creates scheduled task(s)
PID:1960

C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
"C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:452

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

5

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

4

Peripheral Device Discovery