legionlocker | 9e3e436d4345c5b6f20bc060d766a7ee0c3ea8c4aebee80d0cfe3481515961a1

General

Target

LegionLocker.exe
Size

3.4MB
MD5

ff781960baad7ac1974e254bbc7d8044
SHA1

263450e71b84d608d40448c73add2719875c4732
SHA256

9d13fde85da13d3c9533ace39fdfb71c95419f002c946265e6d12030890d8b9d
SHA512

fc572d058d0c4782621d069cc9d16b575363bdd51a3d50bedc4b91b12c0e6ac6d93256ae9266c5cac17878dd0da474477bc283735e8d4decf206e68150495d8a

Score

10^/10

legionlocker evasion ransomware themida trojan

Malware Config

Signatures

Detected LegionLocker ransomware 2 IoCs

Sample contains strings associated with the LegionLocker family.

ransomware

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\LegionL0cker.exe	family_legionlocker
C:\Users\Admin\AppData\Local\Temp\LegionL0cker.exe	family_legionlocker

LegionLocker
Ransomware family active in 2021.
ransomware legionlocker
Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Executes dropped EXE 1 IoCs

Processes:

LegionL0cker.exe

pid process

4580 LegionL0cker.exe

pid	process
4580	LegionL0cker.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:

LegionL0cker.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	LegionL0cker.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	LegionL0cker.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

LegionLocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	LegionLocker.exe

Themida packer 4 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\LegionL0cker.exe	themida
C:\Users\Admin\AppData\Local\Temp\LegionL0cker.exe	themida
behavioral2/memory/4580-140-0x0000000000D00000-0x00000000015D4000-memory.dmp	themida
behavioral2/memory/4580-141-0x0000000000D00000-0x00000000015D4000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

LegionL0cker.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA LegionL0cker.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

LegionL0cker.exe

pid process

4580 LegionL0cker.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	LegionL0cker.exe

pid	process
4580	LegionL0cker.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

LegionLocker.exe

description	pid	process	target process
PID 1940 wrote to memory of 4580	1940	LegionLocker.exe	LegionL0cker.exe
PID 1940 wrote to memory of 4580	1940	LegionLocker.exe	LegionL0cker.exe
PID 1940 wrote to memory of 4580	1940	LegionLocker.exe	LegionL0cker.exe

C:\Users\Admin\AppData\Local\Temp\LegionLocker.exe
"C:\Users\Admin\AppData\Local\Temp\LegionLocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1940
- C:\Users\Admin\AppData\Local\Temp\LegionL0cker.exe
  "C:\Users\Admin\AppData\Local\Temp\LegionL0cker.exe"
  2⤵
  - Executes dropped EXE
  - Checks BIOS information in registry
  - Checks whether UAC is enabled
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:4580

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

4

T1082

Virtualization/Sandbox Evasion

1

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\LegionL0cker.exe

MD5
904434f10fefb2cdfe574f6fcd2573d7

SHA1
fda429015089c1f3d60ec1cca0248ed0bc51ee5b

SHA256
33c4f35afa5f31459379029f461b3f3eeb1794f3b54972f7482adf414ea81196

SHA512
bd91d6ba75fb8e2cf6e28d0aa6eb0df814213edc0e10a5e687602945b13193528015d83820dfda5f33b2bd41d5ea02ecf3c4959c3957a784f32578d2a68fe50a

Download Submit
C:\Users\Admin\AppData\Local\Temp\LegionL0cker.exe

MD5
904434f10fefb2cdfe574f6fcd2573d7

SHA1
fda429015089c1f3d60ec1cca0248ed0bc51ee5b

SHA256
33c4f35afa5f31459379029f461b3f3eeb1794f3b54972f7482adf414ea81196

SHA512
bd91d6ba75fb8e2cf6e28d0aa6eb0df814213edc0e10a5e687602945b13193528015d83820dfda5f33b2bd41d5ea02ecf3c4959c3957a784f32578d2a68fe50a

Download Submit
memory/1940-130-0x0000000000380000-0x00000000006F0000-memory.dmp

Filesize
3.4MB

Download
memory/1940-131-0x0000000005610000-0x0000000005BB4000-memory.dmp

Filesize
5.6MB

Download
memory/1940-132-0x0000000005100000-0x0000000005192000-memory.dmp

Filesize
584KB

Download
memory/1940-133-0x00000000050A0000-0x00000000050AA000-memory.dmp

Filesize
40KB

Download
memory/1940-134-0x0000000005060000-0x0000000005604000-memory.dmp

Filesize
5.6MB

Download
memory/4580-140-0x0000000000D00000-0x00000000015D4000-memory.dmp

Filesize
8.8MB

Download
memory/4580-141-0x0000000000D00000-0x00000000015D4000-memory.dmp

Filesize
8.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads