2720d40ae1bd742db106ddf0a88da889f67bd243f3a08917b2eddba17726d2e1

Analysis

max time kernel
148s
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
23-05-2024 01:29

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General

Target

2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe
Size

60KB
MD5

c529f9ecd9e106b272da396c4c6ec6e1
SHA1

f196eabde97df4c30f161e0317136147ac507ff1
SHA256

2720d40ae1bd742db106ddf0a88da889f67bd243f3a08917b2eddba17726d2e1
SHA512

e84c97f85afbaba634b7eb5c7fa4c70859f8f543c6fba53a965a3ff864bb37532a50e820d0a9adbb22d6c09f7c9cf009a82a0f8f8a9dc55f3226b4eadeea1b00
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaUf3K:z6a+CdOOtEvwDpjQV

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1952-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1952-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4628-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4628-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1952-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1952-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4628-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4628-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1952-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1952-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4628-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4628-27-0x0000000000500000-0x0000000000510000-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_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4628 asih.exe

pid	process
4628	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1952-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1952-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4628-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4628-27-0x0000000000500000-0x0000000000510000-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_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe

description	pid	process	target process
PID 1952 wrote to memory of 4628	1952	2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe	asih.exe
PID 1952 wrote to memory of 4628	1952	2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe	asih.exe
PID 1952 wrote to memory of 4628	1952	2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_c529f9ecd9e106b272da396c4c6ec6e1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1952

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4628

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
60KB

MD5
4e40a3631e6a764b38a447312ceb096b

SHA1
b1d6f458f5af89dc5a161ed0c231133e401e2c5d

SHA256
de985e33b4e2011f0866a9c82aff49ecdc821d3c452ad2f52b7884544d927aa2

SHA512
d0b2561fb68fe85ee9af38faf7903673b35fad72433d1f911f4d47dc9d003a626f335b4edafe89a9f299b3e8cd5743d64e13ecf2e6845b425f5d198a54d11d64

Download Submit
memory/1952-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1952-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1952-2-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/1952-9-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1952-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4628-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4628-20-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/4628-21-0x00000000004B0000-0x00000000004B6000-memory.dmp

Filesize
24KB

Download
memory/4628-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download