22b1a6c34e47c23083fc1d2e3d01bc9dbd3fd4429e13aad6797ad41313447708

General

Target

LegionLocker.exe
Size

6.6MB
MD5

9a72a508fcee3de957167a386f173c44
SHA1

55650582fc704d27cd7d95f971b0ddd13dcd9eaf
SHA256

22b1a6c34e47c23083fc1d2e3d01bc9dbd3fd4429e13aad6797ad41313447708
SHA512

fb8073e5d0c14dbe1780bed15b6a492c0db386acb56b834f56eae9d76cf9872dd95396fd8d6d06048864227fcc90f8cae9d7853169536835a183ea2099994262

Score

9^/10

evasion ransomware themida trojan

Malware Config

Signatures

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

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Modifies extensions of user files 12 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

LegionLocker.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\SearchMove.png => C:\Users\Admin\Pictures\SearchMove.png.lock	LegionLocker.exe
File renamed	C:\Users\Admin\Pictures\UndoNew.tif => C:\Users\Admin\Pictures\UndoNew.tif.lock	LegionLocker.exe
File renamed	C:\Users\Admin\Pictures\CheckpointOpen.png => C:\Users\Admin\Pictures\CheckpointOpen.png.lock	LegionLocker.exe
File renamed	C:\Users\Admin\Pictures\ConvertFromPing.crw => C:\Users\Admin\Pictures\ConvertFromPing.crw.lock	LegionLocker.exe
File renamed	C:\Users\Admin\Pictures\CopyUndo.crw => C:\Users\Admin\Pictures\CopyUndo.crw.lock	LegionLocker.exe
File renamed	C:\Users\Admin\Pictures\RevokeFind.crw => C:\Users\Admin\Pictures\RevokeFind.crw.lock	LegionLocker.exe
File renamed	C:\Users\Admin\Pictures\JoinAdd.raw => C:\Users\Admin\Pictures\JoinAdd.raw.lock	LegionLocker.exe
File renamed	C:\Users\Admin\Pictures\ReadWatch.raw => C:\Users\Admin\Pictures\ReadWatch.raw.lock	LegionLocker.exe
File renamed	C:\Users\Admin\Pictures\CheckpointResume.crw => C:\Users\Admin\Pictures\CheckpointResume.crw.lock	LegionLocker.exe
File renamed	C:\Users\Admin\Pictures\CompareImport.raw => C:\Users\Admin\Pictures\CompareImport.raw.lock	LegionLocker.exe
File renamed	C:\Users\Admin\Pictures\ConvertFromSet.raw => C:\Users\Admin\Pictures\ConvertFromSet.raw.lock	LegionLocker.exe
File renamed	C:\Users\Admin\Pictures\DisableSplit.crw => C:\Users\Admin\Pictures\DisableSplit.crw.lock	LegionLocker.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

LegionLocker.exe

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

Themida packer 2 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral1/memory/1628-62-0x00000000009C0000-0x0000000001294000-memory.dmp	themida
behavioral1/memory/1628-63-0x00000000009C0000-0x0000000001294000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

LegionLocker.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA LegionLocker.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

LegionLocker.exe

pid process

1628 LegionLocker.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

664 taskkill.exe

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

pid	process
664	taskkill.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

LegionLocker.exe

pid	process
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
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1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
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1628	LegionLocker.exe
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1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe
1628	LegionLocker.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

LegionLocker.exetaskkill.exe

description pid process

Token: SeDebugPrivilege 1628 LegionLocker.exe
Token: SeDebugPrivilege 664 taskkill.exe

description	pid	process
Token: SeDebugPrivilege	1628	LegionLocker.exe
Token: SeDebugPrivilege	664	taskkill.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

LegionLocker.execmd.exe

description	pid	process	target process
PID 1628 wrote to memory of 568	1628	LegionLocker.exe	cmd.exe
PID 1628 wrote to memory of 568	1628	LegionLocker.exe	cmd.exe
PID 1628 wrote to memory of 568	1628	LegionLocker.exe	cmd.exe
PID 1628 wrote to memory of 568	1628	LegionLocker.exe	cmd.exe
PID 568 wrote to memory of 664	568	cmd.exe	taskkill.exe
PID 568 wrote to memory of 664	568	cmd.exe	taskkill.exe
PID 568 wrote to memory of 664	568	cmd.exe	taskkill.exe
PID 568 wrote to memory of 664	568	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\LegionLocker.exe
"C:\Users\Admin\AppData\Local\Temp\LegionLocker.exe"
1⤵
- Modifies extensions of user files
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1628

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k color 47 && taskkill /f /im explorer.exe && Exit
2⤵
- Suspicious use of WriteProcessMemory
PID:568

C:\Windows\SysWOW64\taskkill.exe
taskkill /f /im explorer.exe
3⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:664

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

2

T1012

Virtualization/Sandbox Evasion

1

T1497

System Information Discovery

3

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/1628-54-0x00000000751B1000-0x00000000751B3000-memory.dmp

Filesize
8KB

Download
memory/1628-55-0x00000000765F0000-0x0000000076700000-memory.dmp

Filesize
1.1MB

Download
memory/1628-56-0x00000000765F0000-0x0000000076700000-memory.dmp

Filesize
1.1MB

Download
memory/1628-58-0x0000000074FD0000-0x0000000075017000-memory.dmp

Filesize
284KB

Download
memory/1628-60-0x0000000074FD0000-0x0000000075017000-memory.dmp

Filesize
284KB

Download
memory/1628-61-0x0000000076EF0000-0x0000000077070000-memory.dmp

Filesize
1.5MB

Download
memory/1628-62-0x00000000009C0000-0x0000000001294000-memory.dmp

Filesize
8.8MB

Download
memory/1628-63-0x00000000009C0000-0x0000000001294000-memory.dmp

Filesize
8.8MB

Download
memory/1628-64-0x0000000073F80000-0x000000007466E000-memory.dmp

Filesize
6.9MB

Download
memory/1628-65-0x0000000005960000-0x0000000005961000-memory.dmp

Filesize
4KB

Download
memory/1628-66-0x0000000005965000-0x0000000005976000-memory.dmp

Filesize
68KB

Download
memory/1628-67-0x0000000005976000-0x0000000005977000-memory.dmp

Filesize
4KB

Download
memory/1628-68-0x0000000005977000-0x0000000005978000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads