960890c0a08994db206ae216a467454626540fc1f8f1c9aef3c7867d9b6433af

General

Target

2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe
Size

39KB
MD5

3fbb44fe3b30b54bee323310173bebd8
SHA1

ef99ac32c856483241ce433cbf71ce6ea7683566
SHA256

960890c0a08994db206ae216a467454626540fc1f8f1c9aef3c7867d9b6433af
SHA512

808479ab1625e0245ee43b4db1ca83f4fb832c086046aa5a9bf1314ab43eb543f7e0982e1c03134cddb36d87843ec08be43961b7d422f0339403fa469a219a89
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan8l2S:qDdFJy3QMOtEvwDpjjWMl7Tdn83

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3332-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4384-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3332-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4384-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3332-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4384-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3332-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4384-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3332-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4384-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3332-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4384-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4384 asih.exe

pid	process
4384	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3332-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4384-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3332-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4384-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe

description	pid	process	target process
PID 3332 wrote to memory of 4384	3332	2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe	asih.exe
PID 3332 wrote to memory of 4384	3332	2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe	asih.exe
PID 3332 wrote to memory of 4384	3332	2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_3fbb44fe3b30b54bee323310173bebd8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3332

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4384

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 --field-trial-handle=4244,i,13035806169561352434,1332896185314862791,262144 --variations-seed-version --mojo-platform-channel-handle=3900 /prefetch:8
1⤵
PID:4480

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
39KB

MD5
764b70f4dc32746a42da81806324faeb

SHA1
ed7feb94ec50a11c7a36198a6f73f22a26f92a33

SHA256
0e2c31dffb511670bc1ba0e9c98bc68b6ae1a0d2a46d011685b5bfd3c069aa05

SHA512
55fec337c8d15fc79fa69121c412403a58f272fcba6223689677073c87489c0a80aa0df049ce28b9b4dc35ebe392957f0fd788b60a7134c313ae87b64321ff6a

Download Submit
memory/3332-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3332-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3332-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3332-8-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3332-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4384-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4384-20-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/4384-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads