ec5b02d9070232ec4df8d7d40882f023d25c5a435f96c4d5cd5e03c11966073f

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18-02-2024 10:02

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General

Target

2024-02-18_b6eb6111d5adc67ede527ff85e7bb23b_cryptolocker.exe
Size

37KB
MD5

b6eb6111d5adc67ede527ff85e7bb23b
SHA1

3174799ade736764fc5029f3b378d3a400d785c5
SHA256

ec5b02d9070232ec4df8d7d40882f023d25c5a435f96c4d5cd5e03c11966073f
SHA512

a9b95f5bacf151bd443681bf2dd78cbb6bf19a1e66bc7d38859e218752d6b5e5ed968eb0a06618600bb5a43a4bb060602590e98ba1ba16a49f06683cab20e486
SSDEEP

768:V6LsoEEeegiZPvEhHSG+gDYQtOOtEvwDpj/MLam5axZ:V6QFElP6n+gMQMOtEvwDpjyaYa/

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00070000000231f9-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x00070000000231f9-12.dat	CryptoLocker_set1

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-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	2024-02-18_b6eb6111d5adc67ede527ff85e7bb23b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3732	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 4836 wrote to memory of 3732	4836	2024-02-18_b6eb6111d5adc67ede527ff85e7bb23b_cryptolocker.exe	83
PID 4836 wrote to memory of 3732	4836	2024-02-18_b6eb6111d5adc67ede527ff85e7bb23b_cryptolocker.exe	83
PID 4836 wrote to memory of 3732	4836	2024-02-18_b6eb6111d5adc67ede527ff85e7bb23b_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-18_b6eb6111d5adc67ede527ff85e7bb23b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_b6eb6111d5adc67ede527ff85e7bb23b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4836
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3732

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
37KB

MD5
de6e2d8845f67041f5358e55440b653b

SHA1
ea0f1343efeea5a23c162cce01994666407cc122

SHA256
7c33560ce9d7583d93ef6582a6ecc542eae1660563ea495f06f47d18351862b7

SHA512
5552c70b21c10c02801eab96d0de28654ec18e5d05fb11a7391e9810fe70d0bfa5a555dfc35c1c4d14096961b4a9776a5a3998e34955a484eccfcbcbbd8855da

Download Submit
memory/3732-17-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/3732-23-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/4836-0-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/4836-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/4836-2-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download