eae9bb5437f20139e532ce842ed855440db14e80870ba95e0647af83b59dbd4e

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 20:22

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General

Target

2024-02-12_d296d855d7ae94e23074395e09ca6896_cryptolocker.exe
Size

31KB
MD5

d296d855d7ae94e23074395e09ca6896
SHA1

b5f2218e6339098ae35494fca629716fc8712fa6
SHA256

eae9bb5437f20139e532ce842ed855440db14e80870ba95e0647af83b59dbd4e
SHA512

c341b750a6b3c5d4f61f018840a1c175cc47123ffd816563c996d7c3b0915fe5ca892ad64e05286852dddf25107952ba593dcfbc6d9cc90fd1be290bfe1eef23
SSDEEP

768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIOc+jHv:q0zizzOSxMOtEvwDpj/ar1v

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4504-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4916-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4504-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4916-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4916-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4504-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4916-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4504-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4916-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4504-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4916-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-02-12_d296d855d7ae94e23074395e09ca6896_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-02-12_d296d855d7ae94e23074395e09ca6896_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4916 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4916	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_d296d855d7ae94e23074395e09ca6896_cryptolocker.exe

description	pid	process	target process
PID 4504 wrote to memory of 4916	4504	2024-02-12_d296d855d7ae94e23074395e09ca6896_cryptolocker.exe	asih.exe
PID 4504 wrote to memory of 4916	4504	2024-02-12_d296d855d7ae94e23074395e09ca6896_cryptolocker.exe	asih.exe
PID 4504 wrote to memory of 4916	4504	2024-02-12_d296d855d7ae94e23074395e09ca6896_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_d296d855d7ae94e23074395e09ca6896_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_d296d855d7ae94e23074395e09ca6896_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4504

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4916

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
31KB

MD5
7406a6a49acb3c6de1de56a9449db788

SHA1
398b3ac2552878dd6c375c368339755e9a0a0911

SHA256
00ebf397032c94ba8ccea28b9695d7abc4476ed19a5f327146472cc8c02dd4bc

SHA512
1ba6d529a1ea31b706c073f2d11f3df55318eb783bf4da765c0906c6564ded274faa18345ca2f59e09b50f0cceda3f5ac698168a294c4259605886a654e0e370

Download Submit
memory/4504-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4504-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/4504-2-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/4504-3-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4504-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4916-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4916-20-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/4916-26-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/4916-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download