48a489e581639a66722b8c08dad46a77be4f106ac44903100f86ef3cae4ce421

Analysis

max time kernel
155s
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
11/03/2024, 01:33

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General

Target

2024-03-11_9bbc3654bf035bf853d9d15d3864b2bc_cryptolocker.exe
Size

49KB
MD5

9bbc3654bf035bf853d9d15d3864b2bc
SHA1

500a4b8253adc2b189401d3be3059e4104ebe2c6
SHA256

48a489e581639a66722b8c08dad46a77be4f106ac44903100f86ef3cae4ce421
SHA512

96b44c20f8c46a56eb6d13cabf1ce7422cb60cef6ba6c91e80dd5e9d9f9a14bf57f34ff3751d7ad1f4a328e3404653b7c6bf506bcb7aec230d09b2e29b289072
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb6Impy1:BbdDmjr+OtEvwDpjMy

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2916-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2916-2-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2916-11-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002325e-15.dat	CryptoLocker_rule2
behavioral2/memory/4884-29-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/2916-2-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2916-11-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4884-29-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2916-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2916-2-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2916-11-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000002325e-15.dat	UPX
behavioral2/memory/4884-29-0x0000000000500000-0x0000000000510000-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	2024-03-11_9bbc3654bf035bf853d9d15d3864b2bc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4884	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 2916 wrote to memory of 4884	2916	2024-03-11_9bbc3654bf035bf853d9d15d3864b2bc_cryptolocker.exe	102
PID 2916 wrote to memory of 4884	2916	2024-03-11_9bbc3654bf035bf853d9d15d3864b2bc_cryptolocker.exe	102
PID 2916 wrote to memory of 4884	2916	2024-03-11_9bbc3654bf035bf853d9d15d3864b2bc_cryptolocker.exe	102

C:\Users\Admin\AppData\Local\Temp\2024-03-11_9bbc3654bf035bf853d9d15d3864b2bc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-11_9bbc3654bf035bf853d9d15d3864b2bc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2916
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4884

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=2236,i,5367110156796017614,12594004256180761011,262144 --variations-seed-version /prefetch:8
1⤵
PID:4900

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
49KB

MD5
913f703825c034341e1dc23af23a5274

SHA1
56e59ff7cb9f9119ac985d7e80f524251bf5df2d

SHA256
3d4caaeee1af84493e1c4c765a50e323519fe12a98d4107fec545221912e6a0e

SHA512
e2bd569af040a353d73a335fbc0c971e8bc6e2a75e84a26a0e3f0b96c105da0389980162a5dc744a922ebe7f9c3ea3d11739be689969bb28bca93784eee12385

Download Submit
memory/2916-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2916-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2916-2-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2916-3-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2916-4-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2916-11-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4884-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4884-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4884-29-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download