eeedf720fe305898142de9c4b4725b3e225f69db3fcf6d76bf4ae173e7be1c9b

General

Target

2024-05-21_3c21d8460bb08376e88696230badc1b7_cryptolocker.exe
Size

38KB
MD5

3c21d8460bb08376e88696230badc1b7
SHA1

9c3fc1a1ea9bbe1e1b48e8485b94ac59212238f6
SHA256

eeedf720fe305898142de9c4b4725b3e225f69db3fcf6d76bf4ae173e7be1c9b
SHA512

31538162486505fe6a66a30f93b2a71df02a76a53b4a5d6243f5fd5fe4d7ec1688ca3185d96a6c867e5e35135b53cc3201797c3ce710c7205b274716329d6342
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5axK38nn:qUmnpomddpMOtEvwDpjjaYaQ8n

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2452-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1368-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2452-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1368-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2452-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1368-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2452-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1368-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2452-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1368-19-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2452-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1368-28-0x0000000000500000-0x000000000050F000-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_3c21d8460bb08376e88696230badc1b7_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-21_3c21d8460bb08376e88696230badc1b7_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1368 asih.exe

pid	process
1368	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2452-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1368-19-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2452-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1368-28-0x0000000000500000-0x000000000050F000-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_3c21d8460bb08376e88696230badc1b7_cryptolocker.exe

description	pid	process	target process
PID 2452 wrote to memory of 1368	2452	2024-05-21_3c21d8460bb08376e88696230badc1b7_cryptolocker.exe	asih.exe
PID 2452 wrote to memory of 1368	2452	2024-05-21_3c21d8460bb08376e88696230badc1b7_cryptolocker.exe	asih.exe
PID 2452 wrote to memory of 1368	2452	2024-05-21_3c21d8460bb08376e88696230badc1b7_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_3c21d8460bb08376e88696230badc1b7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_3c21d8460bb08376e88696230badc1b7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2452

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1368

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4204,i,6593821857742176458,13646536021844995125,262144 --variations-seed-version --mojo-platform-channel-handle=4504 /prefetch:8
1⤵
PID:4132

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
38KB

MD5
2947059ba7f7772b1e93329726c9bede

SHA1
5fb9887f551d3bc2c6ff91c6c163b3f877dbb043

SHA256
3cbf20739268e3a9d40a3cd505d39aa16fb5e1a063c7ac3fb6052a61b7f24952

SHA512
be57845e8646f3879a1f123fc2312b39c757509699c8b3a9ebd885cb44b876ff2e20da0e64c16daa975ab90cfdb268237e502a7b6414158b6a4e564c49c5c563

Download Submit
memory/1368-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1368-21-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/1368-27-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1368-28-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2452-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2452-1-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

Filesize
24KB

Download
memory/2452-2-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

Filesize
24KB

Download
memory/2452-8-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

Filesize
24KB

Download
memory/2452-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads