stealc | 9a6872a650bffa7b42a4fb73ebb8d81dc8a60aeeccc71b23e0449612bd88e51c

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	Xc121ibGRZji.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
3	1568	file.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Xc121ibGRZji.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Xc121ibGRZji.exe

Executes dropped EXE 2 IoCs

pid	Process
2812	Xc121ibGRZji.exe
4760	VBmUGkBsYt1E.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Themida packer 5 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/files/0x000300000002586a-34.dat	themida
behavioral2/memory/2812-45-0x0000000140000000-0x0000000140808000-memory.dmp	themida
behavioral2/memory/2812-44-0x0000000140000000-0x0000000140808000-memory.dmp	themida
behavioral2/memory/2812-46-0x0000000140000000-0x0000000140808000-memory.dmp	themida
behavioral2/memory/2812-57-0x0000000140000000-0x0000000140808000-memory.dmp	themida

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Checks whether UAC is enabled 1 TTPs 1 IoCs

defense_evasion trojan

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Xc121ibGRZji.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 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	file.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	file.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5028	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1568	file.exe
1568	file.exe
2812	Xc121ibGRZji.exe
2812	Xc121ibGRZji.exe
4760	VBmUGkBsYt1E.exe
4760	VBmUGkBsYt1E.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4760	VBmUGkBsYt1E.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1568 wrote to memory of 1444	1568	file.exe	78
PID 1568 wrote to memory of 1444	1568	file.exe	78
PID 1568 wrote to memory of 1444	1568	file.exe	78
PID 1568 wrote to memory of 2812	1568	file.exe	80
PID 1568 wrote to memory of 2812	1568	file.exe	80
PID 1568 wrote to memory of 4760	1568	file.exe	82
PID 1568 wrote to memory of 4760	1568	file.exe	82
PID 1568 wrote to memory of 4920	1568	file.exe	83
PID 1568 wrote to memory of 4920	1568	file.exe	83
PID 4920 wrote to memory of 5028	4920	cmd.exe	85
PID 4920 wrote to memory of 5028	4920	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Downloads MZ/PE file
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1568
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe"
  2⤵
  PID:1444
- C:\Users\Admin\Documents\Xc121ibGRZji.exe
  "C:\Users\Admin\Documents\Xc121ibGRZji.exe"
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Checks whether UAC is enabled
  - Suspicious behavior: EnumeratesProcesses
  PID:2812
- C:\Users\Admin\Documents\VBmUGkBsYt1E.exe
  "C:\Users\Admin\Documents\VBmUGkBsYt1E.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4760
- C:\Windows\system32\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\file.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4920
- - C:\Windows\system32\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:5028

C:\Program Files\Google\Chrome\Application\133.0.6943.60\elevation_service.exe
"C:\Program Files\Google\Chrome\Application\133.0.6943.60\elevation_service.exe"
1⤵
PID:4992

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Query Registry

4

System Information Discovery

4

Virtualization/Sandbox Evasion