recordbreaker | 3b93d09292f2f38a0405954ff5c9a4697a2425fbcfad55d61782d4d055b2d9f7

Virtualization/Sandbox Evasion

T1497

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

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
4004	k8TE8k5f.exe
4000	cellexprev.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\SystemBiosVersion	Setup.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Setup.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	Setup.exe

Loads dropped DLL 3 IoCs

pid	Process
3020	Setup.exe
3020	Setup.exe
3020	Setup.exe

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
T1081

Themida packer 4 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/3020-130-0x0000000000D30000-0x0000000001310000-memory.dmp	themida
behavioral2/memory/3020-131-0x0000000000D30000-0x0000000001310000-memory.dmp	themida
behavioral2/memory/3020-133-0x0000000000D30000-0x0000000001310000-memory.dmp	themida
behavioral2/memory/3020-141-0x0000000000D30000-0x0000000001310000-memory.dmp	themida

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

Data from Local System
T1005

Credentials in Files
T1081
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

evasion trojan

System Information Discovery

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

Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs

pid	Process
3020	Setup.exe
4004	k8TE8k5f.exe
4004	k8TE8k5f.exe
4000	cellexprev.exe
4000	cellexprev.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 3 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

pid	Process
2040	schtasks.exe
3792	schtasks.exe
5036	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3020	Setup.exe
3020	Setup.exe
4004	k8TE8k5f.exe
4004	k8TE8k5f.exe
4000	cellexprev.exe
4000	cellexprev.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3020 wrote to memory of 4004	3020	Setup.exe	86
PID 3020 wrote to memory of 4004	3020	Setup.exe	86
PID 3020 wrote to memory of 4004	3020	Setup.exe	86
PID 4004 wrote to memory of 2040	4004	k8TE8k5f.exe	87
PID 4004 wrote to memory of 2040	4004	k8TE8k5f.exe	87
PID 4004 wrote to memory of 2040	4004	k8TE8k5f.exe	87
PID 4004 wrote to memory of 1712	4004	k8TE8k5f.exe	90
PID 4004 wrote to memory of 1712	4004	k8TE8k5f.exe	90
PID 4004 wrote to memory of 1712	4004	k8TE8k5f.exe	90
PID 4004 wrote to memory of 3792	4004	k8TE8k5f.exe	91
PID 4004 wrote to memory of 3792	4004	k8TE8k5f.exe	91
PID 4004 wrote to memory of 3792	4004	k8TE8k5f.exe	91
PID 4000 wrote to memory of 5036	4000	cellexprev.exe	94
PID 4000 wrote to memory of 5036	4000	cellexprev.exe	94
PID 4000 wrote to memory of 5036	4000	cellexprev.exe	94

C:\Users\Admin\AppData\Local\Temp\Setup.exe
"C:\Users\Admin\AppData\Local\Temp\Setup.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3020
- C:\Users\Admin\AppData\Roaming\k8TE8k5f.exe
  "C:\Users\Admin\AppData\Roaming\k8TE8k5f.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4004
- - C:\Windows\SysWOW64\schtasks.exe
    /C /create /F /sc minute /mo 5 /tn "ExcelUpdateTaskUA{T0U3T7L6V-L9N0-X6X8D-V5S0-X3L4FL9G9S}" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\cellexprev.exe"
    3⤵
    - Creates scheduled task(s)
    PID:2040
- - C:\Windows\SysWOW64\schtasks.exe
    /C /Query /XML /TN "ExcelUpdateTaskUA{T0U3T7L6V-L9N0-X6X8D-V5S0-X3L4FL9G9S}"
    3⤵
    PID:1712
- - C:\Windows\SysWOW64\schtasks.exe
    /C /create /F /tn "ExcelUpdateTaskUA{T0U3T7L6V-L9N0-X6X8D-V5S0-X3L4FL9G9S}" /XML "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\yqtfncwkobl.xml"
    3⤵
    - Creates scheduled task(s)
    PID:3792

C:\Users\Admin\AppData\Roaming\Microsoft\Excel\cellexprev.exe
C:\Users\Admin\AppData\Roaming\Microsoft\Excel\cellexprev.exe
1⤵
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4000
- C:\Windows\SysWOW64\schtasks.exe
  /C /create /F /sc minute /mo 5 /tn "ExcelUpdateTaskUA{T0U3T7L6V-L9N0-X6X8D-V5S0-X3L4FL9G9S}" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\cellexprev.exe"
  2⤵
  - Creates scheduled task(s)
  PID:5036

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

Persistence

Scheduled Task

Privilege Escalation

Scheduled Task

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

System Information Discovery