b17005019f573d087868a1d9413bc7c4922d437ec1a0586369a860b4a058885b

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 20:02

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General

Target

2024-02-12_6f9bdcded005cf7c07ad4ec72a6fe3a8_cryptolocker.exe
Size

42KB
MD5

6f9bdcded005cf7c07ad4ec72a6fe3a8
SHA1

ef9823df0d6345553d47f27e9ac78cb49cc7c4e9
SHA256

b17005019f573d087868a1d9413bc7c4922d437ec1a0586369a860b4a058885b
SHA512

80ad76e05e0f5a358039a9b849eb59217ce4624a234ea53a4fe5a904cd46eba85de1483ea534436a3ee6e36a9c902c9eae7464d8c70477c2bbf47dc4ef2caa7f
SSDEEP

768:b7o/2n1TCraU6GD1a4X0WcO+wMVm+slAMpheh:bc/y2lkF0+Be0

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\rewok.exe	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

Processes:

2024-02-12_6f9bdcded005cf7c07ad4ec72a6fe3a8_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-02-12_6f9bdcded005cf7c07ad4ec72a6fe3a8_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

rewok.exe

pid process

2728 rewok.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2728	rewok.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_6f9bdcded005cf7c07ad4ec72a6fe3a8_cryptolocker.exe

description	pid	process	target process
PID 4504 wrote to memory of 2728	4504	2024-02-12_6f9bdcded005cf7c07ad4ec72a6fe3a8_cryptolocker.exe	rewok.exe
PID 4504 wrote to memory of 2728	4504	2024-02-12_6f9bdcded005cf7c07ad4ec72a6fe3a8_cryptolocker.exe	rewok.exe
PID 4504 wrote to memory of 2728	4504	2024-02-12_6f9bdcded005cf7c07ad4ec72a6fe3a8_cryptolocker.exe	rewok.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_6f9bdcded005cf7c07ad4ec72a6fe3a8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_6f9bdcded005cf7c07ad4ec72a6fe3a8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4504

C:\Users\Admin\AppData\Local\Temp\rewok.exe
"C:\Users\Admin\AppData\Local\Temp\rewok.exe"
2⤵
- Executes dropped EXE
PID:2728

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\rewok.exe
Filesize
42KB

MD5
6ccb1df9302bc852cf0c48d2d0851ca4

SHA1
a0cde5b35e2adbd2e5019285e15b2b945a148ea0

SHA256
d359b99494006b8cfbe750e74dd6240fc824614f7d372bf973eb13f570fa1975

SHA512
b24c1b1ed0eee96540bd7d1b0872ac4c7735fd487fd0593249e54c11eef65799bc79fe0b82bbed4dd656919a6432a5d0d6887ede9dfa2f9c50c5f1e938e495a2

Download Submit
memory/2728-21-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/4504-0-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/4504-1-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/4504-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download