621e8d1f820d47e40341807bf25c626ebc8fb36c66c2810e74860993bbc2935d

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 03:31

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General

Target

2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe
Size

64KB
MD5

e2a39bf47f2ba9ac8e1ab2a18c5a4e8a
SHA1

02b5cc51b5913fb9ac7d429adfda9ac18a1933e5
SHA256

621e8d1f820d47e40341807bf25c626ebc8fb36c66c2810e74860993bbc2935d
SHA512

e04d591e9273fad17a958f46dec25d5b62ab4418ad6086233804b2019559debeba3ec6c884ab2ec2eca568bf82ca043ab7e3bc5ffc84d85aa7ab952497d78dd8
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsie:BbdDmjr+OtEvwDpjM8j

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2336-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2336-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3412-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2336-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3412-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2336-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2336-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3412-26-0x0000000000500000-0x0000000000510000-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:

2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3412 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3412	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe

description	pid	process	target process
PID 2336 wrote to memory of 3412	2336	2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe	asih.exe
PID 2336 wrote to memory of 3412	2336	2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe	asih.exe
PID 2336 wrote to memory of 3412	2336	2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2336

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3412

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
64KB

MD5
4c003ebf59df5d99c43c961e8169dadf

SHA1
002d14d42ec05f55bdeb95d89fa5327d0d0030ed

SHA256
22d36e6d620575bc4ae61e1111764b95bb62aff60b4ab9ebe0a2c83b680a893b

SHA512
4509c5ac96677d19c05b21d3ecf187505775cc4946ae350a7a6eb2eb2baed38a7a0175402ab4ab00f72094af9c0bdbb274d3c8175b5cdb6ecdf447a528220e1d

Download Submit
memory/2336-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2336-1-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/2336-2-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/2336-9-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/2336-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3412-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3412-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3412-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download