f7dbee43c1b11b113ec5e145490e047ded79eb47a393203c95ab9e2eea554e54

Analysis

max time kernel
151s
max time network
160s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
15/04/2024, 15:08

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General

Target

2024-04-15_dc5a3940115fca04e4353d213da1f93c_cryptolocker.exe
Size

67KB
MD5

dc5a3940115fca04e4353d213da1f93c
SHA1

36836e788ed17089c737f4e4a9a752f017f17fa3
SHA256

f7dbee43c1b11b113ec5e145490e047ded79eb47a393203c95ab9e2eea554e54
SHA512

bbc0ef7fcdfe193fdd66e9a731d32ce7f98d8b162bcb58650b91ba54886116378bfaa59600b43355682ca835761679b4e199b5de403735723b31eac3f81f7490
SSDEEP

768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1PI:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAI

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1780-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1780-10-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002324b-14.dat	CryptoLocker_rule2
behavioral2/memory/112-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1780-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1780-10-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002324b-14.dat	CryptoLocker_set1
behavioral2/memory/112-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1780-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1780-10-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000800000002324b-14.dat	UPX
behavioral2/memory/112-27-0x0000000000500000-0x000000000050F000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-15_dc5a3940115fca04e4353d213da1f93c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
112	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1780-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1780-10-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000800000002324b-14.dat	upx
behavioral2/memory/112-27-0x0000000000500000-0x000000000050F000-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 1780 wrote to memory of 112	1780	2024-04-15_dc5a3940115fca04e4353d213da1f93c_cryptolocker.exe	91
PID 1780 wrote to memory of 112	1780	2024-04-15_dc5a3940115fca04e4353d213da1f93c_cryptolocker.exe	91
PID 1780 wrote to memory of 112	1780	2024-04-15_dc5a3940115fca04e4353d213da1f93c_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-15_dc5a3940115fca04e4353d213da1f93c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_dc5a3940115fca04e4353d213da1f93c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1780
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:112

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 --mojo-platform-channel-handle=1408 --field-trial-handle=2900,i,14549994492153927475,12895178890800740987,262144 --variations-seed-version /prefetch:8
1⤵
PID:1940

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
67KB

MD5
81dfd6d80e6029a73a687078b4285d28

SHA1
8d782309a1dad3ca12c721d59ce252b4ba65389a

SHA256
eca95945324728409aaafc68fdd3ea25f51230cdd36268b0484238445fc2dc9d

SHA512
bf17ca26e04a339197f463e946d15c53296bca4cb4371a705b06f01bbaaae5a1276cca9df26a1b48e47e05bda16b837c1d8d9496066eedfb68c76ee1625bd5ea

Download Submit
memory/112-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/112-20-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/112-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1780-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1780-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1780-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1780-3-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/1780-10-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download