43d4dccc4242b40b8c852b024cd34dee7a20ce61f6d240e7cf79bcd403daaeb4

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
10/05/2024, 21:26

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General

Target

2024-05-10_3a3361158b7c4e47be7f1eea553432cc_cryptolocker.exe
Size

39KB
MD5

3a3361158b7c4e47be7f1eea553432cc
SHA1

af8dfc645a55c17dbc63c6444c44a08ba454366b
SHA256

43d4dccc4242b40b8c852b024cd34dee7a20ce61f6d240e7cf79bcd403daaeb4
SHA512

315cc2bab477006b79403a0039c66183fa0bf7abce4d5ef594a05111de6ad5e66cef3036cd9ad857dad91bdca1fd6cf11101c0709423069eb8868ba92065e94b
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYh:qDdFJy3QMOtEvwDpjjWMl7TM

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4584-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002328e-13.dat	CryptoLocker_rule2
behavioral2/memory/4584-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1732-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4584-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002328e-13.dat	CryptoLocker_set1
behavioral2/memory/4584-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1732-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4584-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002328e-13.dat	UPX
behavioral2/memory/4584-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1732-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-10_3a3361158b7c4e47be7f1eea553432cc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1732	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4584-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002328e-13.dat	upx
behavioral2/memory/4584-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1732-26-0x0000000000500000-0x0000000000510000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4584 wrote to memory of 1732	4584	2024-05-10_3a3361158b7c4e47be7f1eea553432cc_cryptolocker.exe	83
PID 4584 wrote to memory of 1732	4584	2024-05-10_3a3361158b7c4e47be7f1eea553432cc_cryptolocker.exe	83
PID 4584 wrote to memory of 1732	4584	2024-05-10_3a3361158b7c4e47be7f1eea553432cc_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-10_3a3361158b7c4e47be7f1eea553432cc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_3a3361158b7c4e47be7f1eea553432cc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4584
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1732

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
39KB

MD5
ffed0e2eb70ad4212c88f28775913033

SHA1
3cce15f7b3150c83e70607844b30d2ae13f7ed32

SHA256
c198173ae2bfe56b5dcaa8563e9b9ad9ada02da24664a64b3272341c2085dd9f

SHA512
2439b4c13bfe57425a10ad79e05e7c1ecac6c682b4f5140c03a49daec461280cbd56240c2b5c68fc8d4f632302ea368ee023d441f8c68c8da551e39b78ef83c3

Download Submit
memory/1732-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/1732-25-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1732-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4584-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4584-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4584-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4584-9-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4584-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download