d6132e4eb467a78a6d8c7a9b44c892a153f829ffadcd424dd4ca9fbe7e7b8fff

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27-03-2024 03:41

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General

Target

2024-03-27_4cf099194ac1ab513a10ab1946b78595_cryptolocker.exe
Size

85KB
MD5

4cf099194ac1ab513a10ab1946b78595
SHA1

928634ad1ce7c559d3e07236cdb2a7ff20880260
SHA256

d6132e4eb467a78a6d8c7a9b44c892a153f829ffadcd424dd4ca9fbe7e7b8fff
SHA512

69f0d994fdab7de0e263a269249ec7f50fa533033b77cf2a8c084f75ac2ce62da3a039981e5be4e5da20e266607f6baddd2ccacd3c924975a5af9c7b2166b5e3
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIgj7:qkmnpomddpMOtEvwDpjJGYQbN/PKwMg9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1812-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002326a-13.dat	CryptoLocker_rule2
behavioral2/memory/1812-20-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3764-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1812-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002326a-13.dat	CryptoLocker_set1
behavioral2/memory/1812-20-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3764-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1812-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000700000002326a-13.dat	UPX
behavioral2/memory/1812-20-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3764-26-0x0000000000500000-0x000000000050F000-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	2024-03-27_4cf099194ac1ab513a10ab1946b78595_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3764	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1812-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000700000002326a-13.dat	upx
behavioral2/memory/1812-20-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3764-26-0x0000000000500000-0x000000000050F000-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 1812 wrote to memory of 3764	1812	2024-03-27_4cf099194ac1ab513a10ab1946b78595_cryptolocker.exe	97
PID 1812 wrote to memory of 3764	1812	2024-03-27_4cf099194ac1ab513a10ab1946b78595_cryptolocker.exe	97
PID 1812 wrote to memory of 3764	1812	2024-03-27_4cf099194ac1ab513a10ab1946b78595_cryptolocker.exe	97

C:\Users\Admin\AppData\Local\Temp\2024-03-27_4cf099194ac1ab513a10ab1946b78595_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-27_4cf099194ac1ab513a10ab1946b78595_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1812
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3764

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=4160 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
1⤵
PID:3800

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
86KB

MD5
84d8b79049c89602420295fc841d5966

SHA1
1066075c5e928ff7848989acd2ef7f359a04fc97

SHA256
23f1bc69cfcc138a3463433959db7e129fe507ba73f1e9a78a91f4f9e4752ac8

SHA512
5563acdebf340b454ebf916ad5210ec29c9e9d4c6113f80c99596568a1cb065e84dd7057badcc51c6d0255d2bfe29568daaf863201aba7dd7762a200c6f041a6

Download Submit
memory/1812-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1812-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1812-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1812-3-0x0000000002230000-0x0000000002236000-memory.dmp

Filesize
24KB

Download
memory/1812-20-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3764-18-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3764-19-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3764-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download