2409ebccaaa4263de224f3634969432db1ed5fbee3181cd42a8de730ac4536ea

Analysis

max time kernel
149s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 15:45

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General

Target

2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe
Size

91KB
MD5

8473ea94adbec71499d353f8a840e402
SHA1

aebfebc2345b21456403488382bc1ef251f16258
SHA256

2409ebccaaa4263de224f3634969432db1ed5fbee3181cd42a8de730ac4536ea
SHA512

243ddf4977798b95ba1ba80bcf3734a7d7aa11c3687e0356a354ebaca72a26ce17e4b35e78fac3061f80d9b96fe06396ae4b73942d71b76b30dead9935e7b108
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgddg:AnBdOOtEvwDpj6zk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2620-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2620-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4972-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2620-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2620-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4972-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2620-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2620-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4972-27-0x0000000000500000-0x000000000050F000-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

Processes:

2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4972 asih.exe

pid	process
4972	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2620-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2620-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4972-27-0x0000000000500000-0x000000000050F000-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

Processes:

2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe

description	pid	process	target process
PID 2620 wrote to memory of 4972	2620	2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe	asih.exe
PID 2620 wrote to memory of 4972	2620	2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe	asih.exe
PID 2620 wrote to memory of 4972	2620	2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_8473ea94adbec71499d353f8a840e402_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2620

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4972

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=3904 --field-trial-handle=2280,i,1836084024518340990,18250262151825427757,262144 --variations-seed-version /prefetch:8
1⤵
PID:1004

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

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Downloads

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

Filesize
91KB

MD5
20523d489924cc3118b7ad22beae3641

SHA1
8f70103e8a14c3e021455fc933eec96be40b0fba

SHA256
d9750cc7a53b04968b55ef3871df492cd789dd57e4992480a9fbdeccd8c44d1a

SHA512
75a088da202b6c641938926ed5626755bbdac50797d61a4f24d351a9c9c81be716277227aed7d7be9e2bcdbfa5a46c375f4024430e35b5efc332fd806fd659cd

Download Submit
memory/2620-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2620-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2620-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2620-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2620-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4972-20-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4972-26-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/4972-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download