7932b1f55477751237688481e1b73656eaf12888e58fab9c109ce872b5ba9482

Analysis

max time kernel
149s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 15:42

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General

Target

2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe
Size

97KB
MD5

713a5260b3a2c773c0f2ed212f211cae
SHA1

e7217636b43f6ef03b7ac870bd63dc37f3427745
SHA256

7932b1f55477751237688481e1b73656eaf12888e58fab9c109ce872b5ba9482
SHA512

444ed0c366f603110c2fdcdd9f12951deb7848feee75383778f72849d5ddb386e6f3669352bdc00dc62a4ea520f9f7440a2dc37961db800751b960ec2179ceed
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01F:AnBdOOtEvwDpj6zn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2928-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2928-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2376-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2928-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2928-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2376-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2928-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2928-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2376-26-0x0000000000500000-0x000000000050F000-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:

2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2376 asih.exe

pid	process
2376	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2928-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2928-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2376-26-0x0000000000500000-0x000000000050F000-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

Processes:

2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe

description	pid	process	target process
PID 2928 wrote to memory of 2376	2928	2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe	asih.exe
PID 2928 wrote to memory of 2376	2928	2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe	asih.exe
PID 2928 wrote to memory of 2376	2928	2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2928

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2376

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1316 --field-trial-handle=2284,i,9807419199535700662,2319175108930815708,262144 --variations-seed-version /prefetch:8
1⤵
PID:4032

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

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Downloads

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

Filesize
97KB

MD5
48374b493ccf7f73893745c71ca2198c

SHA1
3dc8784b17c1ca25698376b637bb93dc071786a1

SHA256
82bbe8fb319b97c0deab5b4d4a18e335be0d7487c7c2d61036db388d18c9546d

SHA512
e8518da32ab427392709f67a827309a57303889545382215b89e1fbba4ac2e43b3d5a6fb5aa3017727d6c2e5e82c0487e2268c690a034578a98ba9878a0ed4d3

Download Submit
memory/2376-25-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/2376-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/2376-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2928-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2928-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2928-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2928-3-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/2928-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download