agenttesla | c46ee625d9626c6583f1129a66c6044d50ae10ba95fec689e13646a0278afbe0

System Information Discovery

Processes:

BV10013(Rev A).scr

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	BV10013(Rev A).scr
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	BV10013(Rev A).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:

BV10013(Rev A).scr

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	BV10013(Rev A).scr

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

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:

BV10013(Rev A).scr

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	BV10013(Rev A).scr
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	BV10013(Rev A).scr

Suspicious use of SetThreadContext 1 IoCs

Processes:

BV10013(Rev A).scr

description pid process target process

PID 5016 set thread context of 2376 5016 BV10013(Rev A).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

4908 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

BV10013(Rev A).scrMSBuild.exe

pid process

5016 BV10013(Rev A).scr
2376 MSBuild.exe
2376 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

BV10013(Rev A).scrMSBuild.exe

description pid process

Token: SeDebugPrivilege 5016 BV10013(Rev A).scr
Token: SeDebugPrivilege 2376 MSBuild.exe

description	pid	process	target process
PID 5016 set thread context of 2376	5016	BV10013(Rev A).scr	MSBuild.exe

pid	process
4908	schtasks.exe

pid	process
5016	BV10013(Rev A).scr
2376	MSBuild.exe
2376	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	5016	BV10013(Rev A).scr
Token: SeDebugPrivilege	2376	MSBuild.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

BV10013(Rev A).scr

description	pid	process	target process
PID 5016 wrote to memory of 4908	5016	BV10013(Rev A).scr	schtasks.exe
PID 5016 wrote to memory of 4908	5016	BV10013(Rev A).scr	schtasks.exe
PID 5016 wrote to memory of 4908	5016	BV10013(Rev A).scr	schtasks.exe
PID 5016 wrote to memory of 2376	5016	BV10013(Rev A).scr	MSBuild.exe
PID 5016 wrote to memory of 2376	5016	BV10013(Rev A).scr	MSBuild.exe
PID 5016 wrote to memory of 2376	5016	BV10013(Rev A).scr	MSBuild.exe
PID 5016 wrote to memory of 2376	5016	BV10013(Rev A).scr	MSBuild.exe
PID 5016 wrote to memory of 2376	5016	BV10013(Rev A).scr	MSBuild.exe
PID 5016 wrote to memory of 2376	5016	BV10013(Rev A).scr	MSBuild.exe
PID 5016 wrote to memory of 2376	5016	BV10013(Rev A).scr	MSBuild.exe
PID 5016 wrote to memory of 2376	5016	BV10013(Rev A).scr	MSBuild.exe

outlook_office_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\BV10013(Rev A).scr
"C:\Users\Admin\AppData\Local\Temp\BV10013(Rev A).scr" /S
1⤵
- 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
PID:5016

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\jcRskZwAfnFf" /XML "C:\Users\Admin\AppData\Local\Temp\tmp394B.tmp"
2⤵
- Creates scheduled task(s)
PID:4908

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:2376

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

T1120

Lateral Movement

Collection

Email Collection