991b023f61e97d4ba11780d0b0f214b46f8bbf3c710b66f04068990e8925df72

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 15:37

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-21_59ebd007603af21305471a374168cefc_cryptolocker.exe
Size

91KB
MD5

59ebd007603af21305471a374168cefc
SHA1

8d418fbf7bb959d79b53fe625ddcb42bc71a6e5d
SHA256

991b023f61e97d4ba11780d0b0f214b46f8bbf3c710b66f04068990e8925df72
SHA512

01bf001567bb6ef405a6ed0f788381774ee42264feb9e767c068523422b1f34cc8902ece1c9b956cf6deba8c6f52c07904f6b2a0fc7fcf5ea6b347217ab43ed5
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgddM:AnBdOOtEvwDpj6z4

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1284-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1052-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1284-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1052-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1284-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1052-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1284-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1052-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1284-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1052-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1284-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1052-27-0x0000000000500000-0x000000000050F000-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:

2024-05-21_59ebd007603af21305471a374168cefc_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-21_59ebd007603af21305471a374168cefc_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1052 asih.exe

pid	process
1052	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1284-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1052-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1284-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1052-27-0x0000000000500000-0x000000000050F000-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:

2024-05-21_59ebd007603af21305471a374168cefc_cryptolocker.exe

description	pid	process	target process
PID 1284 wrote to memory of 1052	1284	2024-05-21_59ebd007603af21305471a374168cefc_cryptolocker.exe	asih.exe
PID 1284 wrote to memory of 1052	1284	2024-05-21_59ebd007603af21305471a374168cefc_cryptolocker.exe	asih.exe
PID 1284 wrote to memory of 1052	1284	2024-05-21_59ebd007603af21305471a374168cefc_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_59ebd007603af21305471a374168cefc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_59ebd007603af21305471a374168cefc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1284

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1052

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
91KB

MD5
734137732e1fba61c8da15212011b653

SHA1
505e42a1ca24d90de2aea53d6c06e28336e7a1f2

SHA256
d362d73c91dab4afcccd438d7d0d95c64e4106946fcfe921e41082f5f53d0435

SHA512
f61ce77e693933fff8a0842ae66ba0d81f26c69cc2144f7f4aaf5583986cdd4fc06de67129650122027e923cf36cc6760bd632ca13a2d8d481591dcce85b889a

Download Submit
memory/1052-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1052-20-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/1052-26-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/1052-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1284-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1284-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/1284-2-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/1284-9-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/1284-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download