44caliber | f920013efc8d6839e9ff3a2ce43010e1fb46a941a95f99b8c39335d1fbb1bc29

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,\"C:\\Users\\Admin\\AppData\\Local\\Pic1fPBkmq\\LOHejsSdpL.exe\" -s"	4e66b442315b528793daf29f272beb6e.exe

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	4e66b442315b528793daf29f272beb6e.exe

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	5VajCapCB1.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	5VajCapCB1.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	5VajCapCB1.exe

Executes dropped EXE 2 IoCs

pid	Process
1552	M7FQLfl2Do.exe
2864	5VajCapCB1.exe

Loads dropped DLL 3 IoCs

pid	Process
3028	4e66b442315b528793daf29f272beb6e.exe
3028	4e66b442315b528793daf29f272beb6e.exe
2892	Process not Found

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 9 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/files/0x000c000000013a04-15.dat	themida
behavioral1/files/0x000c000000013a04-11.dat	themida
behavioral1/files/0x000c000000013a04-16.dat	themida
behavioral1/files/0x000c000000013a04-18.dat	themida
behavioral1/memory/2864-22-0x000000013F800000-0x0000000140CA5000-memory.dmp	themida
behavioral1/memory/2864-23-0x000000013F800000-0x0000000140CA5000-memory.dmp	themida
behavioral1/memory/2864-24-0x000000013F800000-0x0000000140CA5000-memory.dmp	themida
behavioral1/memory/2864-25-0x000000013F800000-0x0000000140CA5000-memory.dmp	themida
behavioral1/memory/2864-46-0x000000013F800000-0x0000000140CA5000-memory.dmp	themida

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/3028-0-0x0000000000400000-0x000000000142A000-memory.dmp	upx
behavioral1/memory/3028-1-0x0000000000400000-0x000000000142A000-memory.dmp	upx
behavioral1/memory/3028-27-0x0000000000400000-0x000000000142A000-memory.dmp	upx

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

Data from Local System
T1005

Credentials In Files
T1552.001

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	5VajCapCB1.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
2	freegeoip.app
3	freegeoip.app

Suspicious use of NtSetInformationThreadHideFromDebugger 10 IoCs

pid	Process
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.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	M7FQLfl2Do.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	M7FQLfl2Do.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
1552	M7FQLfl2Do.exe
1552	M7FQLfl2Do.exe
1552	M7FQLfl2Do.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
2864	5VajCapCB1.exe
1552	M7FQLfl2Do.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1552	M7FQLfl2Do.exe
Token: SeDebugPrivilege	2864	5VajCapCB1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3028 wrote to memory of 1552	3028	4e66b442315b528793daf29f272beb6e.exe	29
PID 3028 wrote to memory of 1552	3028	4e66b442315b528793daf29f272beb6e.exe	29
PID 3028 wrote to memory of 1552	3028	4e66b442315b528793daf29f272beb6e.exe	29
PID 3028 wrote to memory of 1552	3028	4e66b442315b528793daf29f272beb6e.exe	29
PID 3028 wrote to memory of 2864	3028	4e66b442315b528793daf29f272beb6e.exe	31
PID 3028 wrote to memory of 2864	3028	4e66b442315b528793daf29f272beb6e.exe	31
PID 3028 wrote to memory of 2864	3028	4e66b442315b528793daf29f272beb6e.exe	31
PID 3028 wrote to memory of 2864	3028	4e66b442315b528793daf29f272beb6e.exe	31

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	4e66b442315b528793daf29f272beb6e.exe

C:\Users\Admin\AppData\Local\Temp\4e66b442315b528793daf29f272beb6e.exe
"C:\Users\Admin\AppData\Local\Temp\4e66b442315b528793daf29f272beb6e.exe"
1⤵
- Modifies WinLogon for persistence
- UAC bypass
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
- System policy modification
PID:3028
- C:\Users\Admin\AppData\Local\Temp\M7FQLfl2Do.exe
  "C:\Users\Admin\AppData\Local\Temp\M7FQLfl2Do.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1552
- C:\Users\Admin\AppData\Local\Temp\5VajCapCB1.exe
  "C:\Users\Admin\AppData\Local\Temp\5VajCapCB1.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 use of NtSetInformationThreadHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2864

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

Virtualization/Sandbox Evasion

T1497

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

System Information Discovery