6114a6d8cb5b2d303d27230750b690a899f6743236b54fb7db902e4fae6fd5dc

Analysis

max time kernel
148s
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
20/05/2024, 15:17

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General

Target

2024-05-20_c82053c28368e8cae37101aa37bf0e91_cryptolocker.exe
Size

66KB
MD5

c82053c28368e8cae37101aa37bf0e91
SHA1

a9fe09d5c74b18003a0411cc2bba1236e42ab81f
SHA256

6114a6d8cb5b2d303d27230750b690a899f6743236b54fb7db902e4fae6fd5dc
SHA512

2b252585437936a6993af0735ec4743ebe2d4c22f84f52342091dbd1d41c399c16f772a1eacfd4e6552df3ecc09b6f4db29319c0ef6cee81d1929df45ad56266
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAoQRL:1nK6a+qdOOtEvwDpjC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2876-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002328e-13.dat	CryptoLocker_rule2
behavioral2/memory/2876-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3204-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2876-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002328e-13.dat	CryptoLocker_set1
behavioral2/memory/2876-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3204-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2876-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000700000002328e-13.dat	UPX
behavioral2/memory/2876-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3204-26-0x0000000000500000-0x000000000050F311-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-20_c82053c28368e8cae37101aa37bf0e91_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3204	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2876-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000700000002328e-13.dat	upx
behavioral2/memory/2876-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3204-26-0x0000000000500000-0x000000000050F311-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 2876 wrote to memory of 3204	2876	2024-05-20_c82053c28368e8cae37101aa37bf0e91_cryptolocker.exe	83
PID 2876 wrote to memory of 3204	2876	2024-05-20_c82053c28368e8cae37101aa37bf0e91_cryptolocker.exe	83
PID 2876 wrote to memory of 3204	2876	2024-05-20_c82053c28368e8cae37101aa37bf0e91_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-20_c82053c28368e8cae37101aa37bf0e91_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-20_c82053c28368e8cae37101aa37bf0e91_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2876
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3204

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
66KB

MD5
ea8517bce9f2bab999397cdbf74e6204

SHA1
c606877ae497a3c9fcae37aab3d6e24c814523cc

SHA256
368da7e80fdfe4c616cc834761b4e8dae113f08b5301a47d5a94fb508524d5e1

SHA512
d3dc17105860389a6dcdc8cffa403a574c7461ebbefdf042dd57d7b7720465e744f964ec8127880c0bd4bc5d9ddc672f6d4da85cbd9fe5b3750ab2f492e21c0c

Download Submit
memory/2876-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2876-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2876-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2876-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2876-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3204-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/3204-25-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3204-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download