9f352349adc1092c7afa9371803bfce73e545e07128fdad9c6f7c13e60978321

Analysis

max time kernel
147s
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
15/05/2024, 21:38

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General

Target

2024-05-15_b76b917e0726d7a8225fb7f7f5cbcba5_cryptolocker.exe
Size

38KB
MD5

b76b917e0726d7a8225fb7f7f5cbcba5
SHA1

fc565f8e104f92a697bebb4b607bf8fd04edfb15
SHA256

9f352349adc1092c7afa9371803bfce73e545e07128fdad9c6f7c13e60978321
SHA512

392d25f70cf8255b331b20b2d31e7af6371e409030a10d02284080d44add5f6140b158c86e69ac28407cbf056ac317b17533e381123630b88ed0c81892bbd46e
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5axK3DQ:qUmnpomddpMOtEvwDpjjaYaQ0

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3904-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b00000002341e-13.dat	CryptoLocker_rule2
behavioral2/memory/3904-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4808-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3904-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000b00000002341e-13.dat	CryptoLocker_set1
behavioral2/memory/3904-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4808-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3904-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000b00000002341e-13.dat	UPX
behavioral2/memory/3904-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4808-27-0x0000000000500000-0x000000000050F000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	2024-05-15_b76b917e0726d7a8225fb7f7f5cbcba5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4808	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3904-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000b00000002341e-13.dat	upx
behavioral2/memory/3904-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4808-27-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 3904 wrote to memory of 4808	3904	2024-05-15_b76b917e0726d7a8225fb7f7f5cbcba5_cryptolocker.exe	83
PID 3904 wrote to memory of 4808	3904	2024-05-15_b76b917e0726d7a8225fb7f7f5cbcba5_cryptolocker.exe	83
PID 3904 wrote to memory of 4808	3904	2024-05-15_b76b917e0726d7a8225fb7f7f5cbcba5_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-15_b76b917e0726d7a8225fb7f7f5cbcba5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-15_b76b917e0726d7a8225fb7f7f5cbcba5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3904
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4808

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
38KB

MD5
52ae63c218ca2ce2f9da3ed1b269ad92

SHA1
0bf85f907e8efeb99cbce9e67e4178267d2cbbe6

SHA256
1b6913cb38e393715c65a12264a7db9e4b3e41498829fa5d031daf7f333f9831

SHA512
2d3234b372e0feff24ac4af475e9e8fda16625994d41fa8567a5dfde980b25a95176732ccbeae8ab62efd511f959093bebae9850cc44d8e56bab0e34f98dd8cc

Download Submit
memory/3904-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3904-9-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3904-2-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3904-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3904-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4808-22-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4808-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4808-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download