a4263741b2fb24e81dc06b40bfca3f9f891e08fdc3b18c5ee9075511a159b3b1

Analysis

max time kernel
150s
max time network
151s
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 01:46

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe
Size

79KB
MD5

62fb5ca4613684aadc8d1936744d8a2e
SHA1

f4542bfad25904f697d35837538895612094662c
SHA256

a4263741b2fb24e81dc06b40bfca3f9f891e08fdc3b18c5ee9075511a159b3b1
SHA512

87dc886eaddcd52798650384ad5a6387b2782760fdb5375e7a2625078613be7e84b74c072d3e697a893a68bdfbab3e58f6643b902e65412ac0e6a16334faf5f1
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdJcRk:T6a+rdOOtEvwDpjNth

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4724-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4724-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3432-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4724-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4724-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3432-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4724-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4724-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3432-26-0x0000000000500000-0x0000000000510000-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_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3432 asih.exe

pid	process
3432	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4724-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4724-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3432-26-0x0000000000500000-0x0000000000510000-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:

2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe

description	pid	process	target process
PID 4724 wrote to memory of 3432	4724	2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe	asih.exe
PID 4724 wrote to memory of 3432	4724	2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe	asih.exe
PID 4724 wrote to memory of 3432	4724	2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4724

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3432

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

Loading Replay Monitor...

Downloads

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

Filesize
79KB

MD5
367bebedc40c85ae34cb188fde31be33

SHA1
57df7d3daca64e478d696c4f8864b395664d7685

SHA256
16b3771492d110ea7ef5953bf85a51b689899dc45091e59a98000234de5c7e0a

SHA512
19aa8fd98fa032113707354f1fade4a1996bfd102eae9ad2a0d0bf42672e094cc9d12c8b19ce8c4e44ac1163786467b7ee9d9ec07e5f3ae637554709d2aee358

Download Submit
memory/3432-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3432-25-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3432-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4724-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4724-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4724-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/4724-9-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4724-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download