b160b8d2c2aab2af186e7a368cc715a401120e0c5b8f3e42aa7832e0ad2a5ef0

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
20/02/2024, 07:25

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General

Target

2024-02-20_20e34da77436ba0048fba1eb193ae3b4_cryptolocker.exe
Size

72KB
MD5

20e34da77436ba0048fba1eb193ae3b4
SHA1

88d738cac6169b6c6f8b6679e5d6a420143a39f3
SHA256

b160b8d2c2aab2af186e7a368cc715a401120e0c5b8f3e42aa7832e0ad2a5ef0
SHA512

524842b1e0b0739a7a58afada718b7fe248de916c7d625a099ff2663a855d86de9047c7e8bd5567c076f631c48b0b9c9cb852e2c679fe7aa09c81656a0c319ca
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsaleg:1nK6a+qdOOtEvwDpj8

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4872-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000231d9-13.dat	CryptoLocker_rule2
behavioral2/memory/4872-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2556-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4872-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00080000000231d9-13.dat	CryptoLocker_set1
behavioral2/memory/4872-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2556-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4872-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x00080000000231d9-13.dat	UPX
behavioral2/memory/4872-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2556-26-0x0000000000500000-0x000000000050F311-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	2024-02-20_20e34da77436ba0048fba1eb193ae3b4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2556	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4872-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x00080000000231d9-13.dat	upx
behavioral2/memory/4872-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2556-26-0x0000000000500000-0x000000000050F311-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

description	pid	Process	procid_target
PID 4872 wrote to memory of 2556	4872	2024-02-20_20e34da77436ba0048fba1eb193ae3b4_cryptolocker.exe	85
PID 4872 wrote to memory of 2556	4872	2024-02-20_20e34da77436ba0048fba1eb193ae3b4_cryptolocker.exe	85
PID 4872 wrote to memory of 2556	4872	2024-02-20_20e34da77436ba0048fba1eb193ae3b4_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-20_20e34da77436ba0048fba1eb193ae3b4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-20_20e34da77436ba0048fba1eb193ae3b4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4872
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2556

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\asih.exe

Filesize
72KB

MD5
a1d61376b7bb6b0f861e199976b7a4e0

SHA1
097019ed2f7a165c8633da9a5d20c299bd1fadfc

SHA256
b3319d4f951f9ada08211eea9c375b41ebdeaf108a90bdff120bece244330d63

SHA512
ca10021a90d29a70288f00c595ff26e29f1b5c6c56168071d637c918bc666478c8d52114c44a00afdfeb1bb38fffa7ad4650f5f3a373d28e85a59928fe2b2ada

Download Submit
memory/2556-19-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/2556-21-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/2556-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4872-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4872-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4872-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4872-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4872-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download