fd65fc44ea3e33cc8eeaa1d34bf7feb21d2aad53b7c0cb964c613e806a2d88a1

Analysis

max time kernel
151s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 21:52

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General

Target

2024-05-22_9a13788f333db94f13c6b36b34a5966b_cryptolocker.exe
Size

64KB
MD5

9a13788f333db94f13c6b36b34a5966b
SHA1

9ff7e1378fa1d91b44a51938e96502fea0bf8a39
SHA256

fd65fc44ea3e33cc8eeaa1d34bf7feb21d2aad53b7c0cb964c613e806a2d88a1
SHA512

253c843047d89ccd63f5e226fa18b6442d775715595870c87abe0358c7680f0d7f3a9378011848f24c719d18dc505baf68f08800b0c61f91a620ccaec4cc1e9d
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiK:BbdDmjr+OtEvwDpjM8/

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3220-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3220-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3996-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3220-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3996-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3220-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3220-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3996-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_9a13788f333db94f13c6b36b34a5966b_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-22_9a13788f333db94f13c6b36b34a5966b_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3996 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3996	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_9a13788f333db94f13c6b36b34a5966b_cryptolocker.exe

description	pid	process	target process
PID 3220 wrote to memory of 3996	3220	2024-05-22_9a13788f333db94f13c6b36b34a5966b_cryptolocker.exe	asih.exe
PID 3220 wrote to memory of 3996	3220	2024-05-22_9a13788f333db94f13c6b36b34a5966b_cryptolocker.exe	asih.exe
PID 3220 wrote to memory of 3996	3220	2024-05-22_9a13788f333db94f13c6b36b34a5966b_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_9a13788f333db94f13c6b36b34a5966b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_9a13788f333db94f13c6b36b34a5966b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3220
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3996

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=1316 --field-trial-handle=2280,i,11703952675008463361,17436195144517971517,262144 --variations-seed-version /prefetch:8
1⤵
PID:3984

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
64KB

MD5
900911ed60b0ba97925faa85cc375fd2

SHA1
c98c6bb230b6aac3294c639cf15cee9161aa1d4a

SHA256
b894c1d31c66a8a108fce6ab94ba47ff45c7cbd312b4ac15bc8a10f781ce4ff6

SHA512
166077452499b29a07bdaa5fd55100cd3b4780c362eca4a9e683fde643ea814f7d421f43ffcce33578935c6578c4b4da5a021d0b765d6d7840201c2d512e6a3a

Download Submit
memory/3220-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3220-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3220-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3220-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3220-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3996-18-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/3996-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/3996-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download