b1222b2ea9d0751fbf23cccb43444c9c374f0f98f39355932343619b91aa5a2c

Analysis

max time kernel
161s
max time network
170s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
21/04/2024, 03:48

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General

Target

2024-04-21_46c0caa1d58aa51cb650ff618619a42e_cryptolocker.exe
Size

62KB
MD5

46c0caa1d58aa51cb650ff618619a42e
SHA1

e9cfbb11334556c180a40bce560e06d1a01b74f9
SHA256

b1222b2ea9d0751fbf23cccb43444c9c374f0f98f39355932343619b91aa5a2c
SHA512

e524077a17decbf173cc921bf4f1472c5790fa4bf95de768fa7656b69998bd460af7b63219dca953b823cc30890c4d675f72f5041cb8fcb6d7e5d07ddd540ab3
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsik:BbdDmjr+OtEvwDpjM89

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4352-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4352-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002325e-15.dat	CryptoLocker_rule2
behavioral2/memory/904-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4352-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/904-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4352-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4352-10-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002325e-15.dat	UPX
behavioral2/memory/904-28-0x0000000000500000-0x0000000000510000-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	2024-04-21_46c0caa1d58aa51cb650ff618619a42e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
904	asih.exe

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 4352 wrote to memory of 904	4352	2024-04-21_46c0caa1d58aa51cb650ff618619a42e_cryptolocker.exe	92
PID 4352 wrote to memory of 904	4352	2024-04-21_46c0caa1d58aa51cb650ff618619a42e_cryptolocker.exe	92
PID 4352 wrote to memory of 904	4352	2024-04-21_46c0caa1d58aa51cb650ff618619a42e_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-04-21_46c0caa1d58aa51cb650ff618619a42e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-21_46c0caa1d58aa51cb650ff618619a42e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4352
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:904

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=4068 --field-trial-handle=3088,i,14310325015283915034,7660943942870463106,262144 --variations-seed-version /prefetch:8
1⤵
PID:1728

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
63KB

MD5
0190671e5dabf3d7867544f876cb757c

SHA1
9335693ba0120126929369ef2f2032e90cca6566

SHA256
63d26c26b9b5c9155f706db3ac7a395b6b2b64a8c85acfbddff617497da585bc

SHA512
edb3129d0285f49deb39d5d8a3094a9f6243f4fec959e76b223b783253782dc22a1c3cbd49955469d3f140bfddb5307baa80fbb0eecd8aee3754490b28a214a9

Download Submit
memory/904-20-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/904-21-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/904-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4352-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4352-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4352-2-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4352-3-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4352-10-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download