ea9baf1b24d3fd5990b6a951476a4bac26487bce15adf6c5b36bc8cdf3a0fcff

Analysis

max time kernel
141s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 17:58

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General

Target

2024-02-12_fe7923872dc90c317bca9e03c2d25bd7_cryptolocker.exe
Size

49KB
MD5

fe7923872dc90c317bca9e03c2d25bd7
SHA1

8626aa02ca9cf4e2e981d733888d40a21edd9fac
SHA256

ea9baf1b24d3fd5990b6a951476a4bac26487bce15adf6c5b36bc8cdf3a0fcff
SHA512

693042c566d2ae238f34efddfce91d2070a7f947f700692beb80a4c19a7b4ce4429705a81fbb10cda9346ceb4e2386630f05ce334b46be56ed41a110eabcff0a
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/rJ+Nw8qnTHY+E:79mqyNhQMOtEvwDpjBxe8GW

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2572-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2572-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2572-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2572-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

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_fe7923872dc90c317bca9e03c2d25bd7_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	2024-02-12_fe7923872dc90c317bca9e03c2d25bd7_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1732 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1732	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_fe7923872dc90c317bca9e03c2d25bd7_cryptolocker.exe

description	pid	process	target process
PID 2572 wrote to memory of 1732	2572	2024-02-12_fe7923872dc90c317bca9e03c2d25bd7_cryptolocker.exe	asih.exe
PID 2572 wrote to memory of 1732	2572	2024-02-12_fe7923872dc90c317bca9e03c2d25bd7_cryptolocker.exe	asih.exe
PID 2572 wrote to memory of 1732	2572	2024-02-12_fe7923872dc90c317bca9e03c2d25bd7_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_fe7923872dc90c317bca9e03c2d25bd7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_fe7923872dc90c317bca9e03c2d25bd7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2572

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
49KB

MD5
f6fd2fc17cb730562817a4be19e62bb3

SHA1
02b19f132ab6485ae5bedf9d853d4326ed7306b1

SHA256
a14affe828bfa7ffeae13a699b39b4b821487db9ff4b0c6dd608cd495a0030de

SHA512
70828cca1ccf16c0e31d98f3b6eea8c663854e2a9d1fb05b04e627463a5cf9adb3b1e30081e9a8c15fadf3797311578824fea2b2fc7832fa7355d7994708d5ff

Download Submit
memory/1732-19-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/1732-20-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/2572-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2572-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/2572-2-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/2572-3-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/2572-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download