44caliber | f920013efc8d6839e9ff3a2ce43010e1fb46a941a95f99b8c39335d1fbb1bc29

Processes:

4e66b442315b528793daf29f272beb6e.exe

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

Processes:

4e66b442315b528793daf29f272beb6e.exe

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
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

dh4nEchLKF.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ dh4nEchLKF.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	dh4nEchLKF.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

Processes:

dh4nEchLKF.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	dh4nEchLKF.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	dh4nEchLKF.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

System Information Discovery

Processes:

4e66b442315b528793daf29f272beb6e.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	4e66b442315b528793daf29f272beb6e.exe

Executes dropped EXE 2 IoCs

Processes:

duTN6Ni35B.exedh4nEchLKF.exe

pid process

1356 duTN6Ni35B.exe
5060 dh4nEchLKF.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
T1552.001

Themida packer 21 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\dh4nEchLKF.exe	themida
C:\Users\Admin\AppData\Local\Temp\dh4nEchLKF.exe	themida
C:\Users\Admin\AppData\Local\Temp\dh4nEchLKF.exe	themida
behavioral2/memory/5060-56-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-57-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-58-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-106-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-155-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-159-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-165-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-168-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-171-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-173-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-175-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-177-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-179-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-181-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-183-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-185-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-187-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida
behavioral2/memory/5060-189-0x00007FF697240000-0x00007FF6986E5000-memory.dmp	themida

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3500-0-0x0000000000400000-0x000000000142A000-memory.dmp	upx
behavioral2/memory/3500-54-0x0000000000400000-0x000000000142A000-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
T1082

Processes:

dh4nEchLKF.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA dh4nEchLKF.exe
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

34 freegeoip.app
41 freegeoip.app
33 freegeoip.app

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	dh4nEchLKF.exe

flow	ioc
34	freegeoip.app
41	freegeoip.app
33	freegeoip.app

Suspicious use of NtSetInformationThreadHideFromDebugger 10 IoCs

Processes:

dh4nEchLKF.exe

pid	process
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.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

Processes:

duTN6Ni35B.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	duTN6Ni35B.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	duTN6Ni35B.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

duTN6Ni35B.exedh4nEchLKF.exe

pid	process
1356	duTN6Ni35B.exe
1356	duTN6Ni35B.exe
1356	duTN6Ni35B.exe
1356	duTN6Ni35B.exe
1356	duTN6Ni35B.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe
5060	dh4nEchLKF.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

duTN6Ni35B.exedh4nEchLKF.exe

description pid process

Token: SeDebugPrivilege 1356 duTN6Ni35B.exe
Token: SeDebugPrivilege 5060 dh4nEchLKF.exe

description	pid	process
Token: SeDebugPrivilege	1356	duTN6Ni35B.exe
Token: SeDebugPrivilege	5060	dh4nEchLKF.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

4e66b442315b528793daf29f272beb6e.exedh4nEchLKF.exe

description	pid	process	target process
PID 3500 wrote to memory of 1356	3500	4e66b442315b528793daf29f272beb6e.exe	duTN6Ni35B.exe
PID 3500 wrote to memory of 1356	3500	4e66b442315b528793daf29f272beb6e.exe	duTN6Ni35B.exe
PID 3500 wrote to memory of 5060	3500	4e66b442315b528793daf29f272beb6e.exe	dh4nEchLKF.exe
PID 3500 wrote to memory of 5060	3500	4e66b442315b528793daf29f272beb6e.exe	dh4nEchLKF.exe
PID 5060 wrote to memory of 4440	5060	dh4nEchLKF.exe	cmd.exe
PID 5060 wrote to memory of 4440	5060	dh4nEchLKF.exe	cmd.exe

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

Processes:

4e66b442315b528793daf29f272beb6e.exe

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
- Checks computer location settings
- Suspicious use of WriteProcessMemory
- System policy modification
PID:3500

C:\Users\Admin\AppData\Local\Temp\duTN6Ni35B.exe
"C:\Users\Admin\AppData\Local\Temp\duTN6Ni35B.exe"
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1356

C:\Users\Admin\AppData\Local\Temp\dh4nEchLKF.exe
"C:\Users\Admin\AppData\Local\Temp\dh4nEchLKF.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
- Suspicious use of WriteProcessMemory
PID:5060

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c pause > nul
3⤵
PID:4440

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Defense Evasion

Modify Registry

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Virtualization/Sandbox Evasion

T1497

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

Virtualization/Sandbox Evasion

T1497

System Information Discovery