af3e90f04d4545b802beede87283962e13d9103af3ed1ff2c82d534eaddeef29

Analysis

max time kernel
153s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
24/04/2024, 17:27

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General

Target

2024-04-24_1e8cbdd2660744013bbb32a1d8219afe_cryptolocker.exe
Size

42KB
MD5

1e8cbdd2660744013bbb32a1d8219afe
SHA1

8c1ddbcee5636671c3893d2e3850ac7acc72eb83
SHA256

af3e90f04d4545b802beede87283962e13d9103af3ed1ff2c82d534eaddeef29
SHA512

fdf1d82fa9d5f6ff8a221aee182fb557733f682aec1ba31e865fb04d093c2157636922072eb445453db06d9b58f828c4a2e2575b478e619e079952b92cdd9b38
SSDEEP

384:bm74uGLLQRcsdeQ72ngEr4K7YmE8jo0nrlwfjDU8p:bm74zYcgT/Ekn0ryfjr

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4752-0-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023261-13.dat	CryptoLocker_rule2
behavioral2/memory/2372-17-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4752-19-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2372-27-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2

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	2024-04-24_1e8cbdd2660744013bbb32a1d8219afe_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2372	hasfj.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 4752 wrote to memory of 2372	4752	2024-04-24_1e8cbdd2660744013bbb32a1d8219afe_cryptolocker.exe	89
PID 4752 wrote to memory of 2372	4752	2024-04-24_1e8cbdd2660744013bbb32a1d8219afe_cryptolocker.exe	89
PID 4752 wrote to memory of 2372	4752	2024-04-24_1e8cbdd2660744013bbb32a1d8219afe_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-04-24_1e8cbdd2660744013bbb32a1d8219afe_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_1e8cbdd2660744013bbb32a1d8219afe_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4752
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:2372

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=4156 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
1⤵
PID:2288

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\hasfj.exe

Filesize
43KB

MD5
27dccc41c7a29ff8cd65d8549ccbada9

SHA1
8b1b3d1b18d265190a3c06253c9d8f6667607ae3

SHA256
33a530901f1a6e0f271f7d9ef3bca1122e0297feb18d714f2bedaaf6cd16a8fb

SHA512
e7d73fc226199c40d368e8c296fdf8cb8d74d522b9c23a11fa2a8671335d0483a7f7a8545bb783590e6e3be8d4f8917896faa7aaed574fc22deaa4c19a5ac90d

Download Submit
memory/2372-17-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/2372-20-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/2372-23-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/2372-27-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/4752-0-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/4752-1-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/4752-2-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/4752-3-0x0000000002380000-0x0000000002386000-memory.dmp

Filesize
24KB

Download
memory/4752-19-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download