amadey | 5d3bdd91e0b184716f9c229e5bc3d6e7f0c349e1db0a570fe6032b7bd651059a

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	d20c169833df7d5a176530bf19e65813.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	Utsysc.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	Utsysc.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	Utsysc.exe

Blocklisted process makes network request 2 IoCs

flow	pid	Process
68	4976	rundll32.exe
163	4800	rundll32.exe

Checks BIOS information in registry 2 TTPs 8 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	Utsysc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Utsysc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Utsysc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Utsysc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Utsysc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	d20c169833df7d5a176530bf19e65813.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	d20c169833df7d5a176530bf19e65813.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Utsysc.exe

Checks computer location settings 2 TTPs 2 IoCs

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

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2598572287-1024438387-935107970-1000\Control Panel\International\Geo\Nation	d20c169833df7d5a176530bf19e65813.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2598572287-1024438387-935107970-1000\Control Panel\International\Geo\Nation	Utsysc.exe

Executes dropped EXE 3 IoCs

pid	Process
2924	Utsysc.exe
4584	Utsysc.exe
3908	Utsysc.exe

Loads dropped DLL 3 IoCs

pid	Process
5084	rundll32.exe
4976	rundll32.exe
4800	rundll32.exe

Reads local data of messenger clients 2 TTPs
Infostealers often target stored data of messaging applications, which can include saved credentials and account information.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 2 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

Themida packer 42 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/4372-0-0x0000000000A90000-0x0000000001A4A000-memory.dmp	themida
behavioral2/memory/4372-5-0x0000000000A90000-0x0000000001A4A000-memory.dmp	themida
behavioral2/memory/4372-19-0x0000000000A90000-0x0000000001A4A000-memory.dmp	themida
behavioral2/memory/4372-20-0x0000000000A90000-0x0000000001A4A000-memory.dmp	themida
behavioral2/memory/4372-21-0x0000000000A90000-0x0000000001A4A000-memory.dmp	themida
behavioral2/memory/4372-22-0x0000000000A90000-0x0000000001A4A000-memory.dmp	themida
behavioral2/memory/4372-23-0x0000000000A90000-0x0000000001A4A000-memory.dmp	themida
behavioral2/memory/4372-24-0x0000000000A90000-0x0000000001A4A000-memory.dmp	themida
behavioral2/memory/4372-25-0x0000000000A90000-0x0000000001A4A000-memory.dmp	themida
behavioral2/files/0x0009000000023133-30.dat	themida
behavioral2/files/0x0009000000023133-37.dat	themida
behavioral2/memory/2924-39-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/4372-38-0x0000000000A90000-0x0000000001A4A000-memory.dmp	themida
behavioral2/memory/2924-48-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/2924-43-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/2924-58-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/2924-59-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/2924-60-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/2924-61-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/2924-62-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/2924-63-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/2924-64-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/files/0x0009000000023133-65.dat	themida
behavioral2/memory/2924-75-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/2924-90-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/2924-91-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/2924-107-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/files/0x0009000000023133-109.dat	themida
behavioral2/memory/4584-110-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/4584-117-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/4584-119-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/4584-128-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/4584-129-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/4584-130-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/4584-131-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/4584-132-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/4584-133-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/4584-134-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/4584-135-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/files/0x0009000000023133-142.dat	themida
behavioral2/memory/3908-152-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida
behavioral2/memory/3908-169-0x0000000000B60000-0x0000000001B1A000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 4 IoCs

evasion trojan

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	d20c169833df7d5a176530bf19e65813.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Utsysc.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Utsysc.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Utsysc.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs

pid	Process
4372	d20c169833df7d5a176530bf19e65813.exe
2924	Utsysc.exe
4584	Utsysc.exe
3908	Utsysc.exe

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

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/Job

pid	Process
4932	schtasks.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
4372	d20c169833df7d5a176530bf19e65813.exe
4372	d20c169833df7d5a176530bf19e65813.exe
4372	d20c169833df7d5a176530bf19e65813.exe
4372	d20c169833df7d5a176530bf19e65813.exe
2924	Utsysc.exe
2924	Utsysc.exe
2924	Utsysc.exe
2924	Utsysc.exe
4976	rundll32.exe
4976	rundll32.exe
4976	rundll32.exe
4976	rundll32.exe
4976	rundll32.exe
4976	rundll32.exe
4976	rundll32.exe
4976	rundll32.exe
4584	Utsysc.exe
4584	Utsysc.exe
4584	Utsysc.exe
4584	Utsysc.exe
3908	Utsysc.exe
3908	Utsysc.exe
3908	Utsysc.exe
3908	Utsysc.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4372	d20c169833df7d5a176530bf19e65813.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4372 wrote to memory of 2924	4372	d20c169833df7d5a176530bf19e65813.exe	93
PID 4372 wrote to memory of 2924	4372	d20c169833df7d5a176530bf19e65813.exe	93
PID 4372 wrote to memory of 2924	4372	d20c169833df7d5a176530bf19e65813.exe	93
PID 2924 wrote to memory of 4932	2924	Utsysc.exe	95
PID 2924 wrote to memory of 4932	2924	Utsysc.exe	95
PID 2924 wrote to memory of 4932	2924	Utsysc.exe	95
PID 2924 wrote to memory of 5084	2924	Utsysc.exe	103
PID 2924 wrote to memory of 5084	2924	Utsysc.exe	103
PID 2924 wrote to memory of 5084	2924	Utsysc.exe	103
PID 5084 wrote to memory of 4976	5084	rundll32.exe	104
PID 5084 wrote to memory of 4976	5084	rundll32.exe	104
PID 4976 wrote to memory of 3524	4976	rundll32.exe	105
PID 4976 wrote to memory of 3524	4976	rundll32.exe	105
PID 4976 wrote to memory of 4028	4976	rundll32.exe	108
PID 4976 wrote to memory of 4028	4976	rundll32.exe	108
PID 2924 wrote to memory of 4800	2924	Utsysc.exe	114
PID 2924 wrote to memory of 4800	2924	Utsysc.exe	114
PID 2924 wrote to memory of 4800	2924	Utsysc.exe	114

C:\Users\Admin\AppData\Local\Temp\d20c169833df7d5a176530bf19e65813.exe
"C:\Users\Admin\AppData\Local\Temp\d20c169833df7d5a176530bf19e65813.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:4372
- C:\Users\Admin\AppData\Local\Temp\4fdb51ccdc\Utsysc.exe
  "C:\Users\Admin\AppData\Local\Temp\4fdb51ccdc\Utsysc.exe"
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Checks computer location settings
  - Executes dropped EXE
  - Checks whether UAC is enabled
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2924
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /SC MINUTE /MO 1 /TN Utsysc.exe /TR "C:\Users\Admin\AppData\Local\Temp\4fdb51ccdc\Utsysc.exe" /F
    3⤵
    - Creates scheduled task(s)
    PID:4932
- - C:\Windows\SysWOW64\rundll32.exe
    "C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Roaming\80c6bf70bf3f8f\cred64.dll, Main
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:5084
  - - C:\Windows\system32\rundll32.exe
      "C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Roaming\80c6bf70bf3f8f\cred64.dll, Main
      4⤵
      Blocklisted process makes network request
      Loads dropped DLL
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:4976
    - - C:\Windows\system32\netsh.exe
        
        netsh wlan show profiles
        5⤵
        
        PID:3524
    - - C:\Windows\system32\tar.exe
        
        tar.exe -cf "C:\Users\Admin\AppData\Local\Temp\598572287102_Desktop.tar" "C:\Users\Admin\AppData\Local\Temp\_Files_\*.*"
        5⤵
        
        PID:4028
- - C:\Windows\SysWOW64\rundll32.exe
    "C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Roaming\80c6bf70bf3f8f\clip64.dll, Main
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    PID:4800

C:\Users\Admin\AppData\Local\Temp\4fdb51ccdc\Utsysc.exe
C:\Users\Admin\AppData\Local\Temp\4fdb51ccdc\Utsysc.exe
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:4584

C:\Users\Admin\AppData\Local\Temp\4fdb51ccdc\Utsysc.exe
C:\Users\Admin\AppData\Local\Temp\4fdb51ccdc\Utsysc.exe
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:3908

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Scheduled Task/Job

Privilege Escalation

Scheduled Task/Job

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

System Information Discovery