d265a9d163f39bc2ef88e34362bdad45f3974b721f79c0deea1318fc87e84b8e

Analysis

max time kernel
150s
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 15:31

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General

Target

2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe
Size

23KB
MD5

2fb0e5dcb3ed224d26670b2e730393c6
SHA1

4ee75633deb351a204242ed36c192ef874753a96
SHA256

d265a9d163f39bc2ef88e34362bdad45f3974b721f79c0deea1318fc87e84b8e
SHA512

553b870b38d0ebc94923a73fc30a2c28d84cc521248113614596de3cbf6fcc8ee8df86dfc7868c3817801d3ce9b9941d1884e3a2bbe27fdd21321f487f482406
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HM8:bVCPwFRo6CpwXFXSqQXfjAs8

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/552-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral2/memory/552-16-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4688-18-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4688-27-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/552-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	UPX
behavioral2/memory/552-16-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/4688-18-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/4688-27-0x0000000008000000-0x000000000800E000-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_2fb0e5dcb3ed224d26670b2e730393c6_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_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

4688 hasfj.exe

pid	process
4688	hasfj.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/552-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	upx
behavioral2/memory/552-16-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/4688-18-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/4688-27-0x0000000008000000-0x000000000800E000-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_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe

description	pid	process	target process
PID 552 wrote to memory of 4688	552	2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe	hasfj.exe
PID 552 wrote to memory of 4688	552	2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe	hasfj.exe
PID 552 wrote to memory of 4688	552	2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:552
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:4688

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\hasfj.exe

Filesize
24KB

MD5
d40031619c812bca4f0d40942b0a4836

SHA1
78efbb00378a864a8e98ed0f7e139c00bc8961c4

SHA256
b98e0bb723ee2f870c9319ce73aa5d7d209c792445341fc78307b5a319a59d4a

SHA512
445c02d30b6a763aff9a0445653c98e15142eb4bcf52a62f5bfa05b4f1cdc7610f4a28642888cb3e8d49d1908c04790a37e9ca09416b0fdd6b8a4853b4a48839

Download Submit
memory/552-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/552-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/552-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/552-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/552-16-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4688-18-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4688-20-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/4688-26-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/4688-27-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download