1da16a249af31cc3fbdcbf4a2196934e21958649428ef44c953c3eef92e4ae0c

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 18:28

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-02-12_a5436197fe63a3f4144c878173b96272_cryptolocker.exe
Size

33KB
MD5

a5436197fe63a3f4144c878173b96272
SHA1

d09d4d8cd86f4cf9e8fb73ae6562702ef76d0725
SHA256

1da16a249af31cc3fbdcbf4a2196934e21958649428ef44c953c3eef92e4ae0c
SHA512

74d79fadf6eb515f85989c569d17a2a9425b1be8bebf992c30420512609cc1812cb3813d758fca959be94b18cb28f4eb64a9102861e156fc0c39cd40750e97a3
SSDEEP

384:bmM0V/YPvnr801TRoUGPh4TKt6ATt1DqgPa3s/zzoCt9/B1RU3q5:b7o/2n1TCraU6GD1a4Xt9bRU65

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_a5436197fe63a3f4144c878173b96272_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-02-12_a5436197fe63a3f4144c878173b96272_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

rewok.exe

pid process

3972 rewok.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3972	rewok.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_a5436197fe63a3f4144c878173b96272_cryptolocker.exe

description	pid	process	target process
PID 3148 wrote to memory of 3972	3148	2024-02-12_a5436197fe63a3f4144c878173b96272_cryptolocker.exe	rewok.exe
PID 3148 wrote to memory of 3972	3148	2024-02-12_a5436197fe63a3f4144c878173b96272_cryptolocker.exe	rewok.exe
PID 3148 wrote to memory of 3972	3148	2024-02-12_a5436197fe63a3f4144c878173b96272_cryptolocker.exe	rewok.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_a5436197fe63a3f4144c878173b96272_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_a5436197fe63a3f4144c878173b96272_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3148

C:\Users\Admin\AppData\Local\Temp\rewok.exe
"C:\Users\Admin\AppData\Local\Temp\rewok.exe"
2⤵
- Executes dropped EXE
PID:3972

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

Loading Replay Monitor...

Downloads

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

Filesize
33KB

MD5
caa9d1a3c1c29da16fa19a0477462a22

SHA1
33ebbeb79d09b573b17bb7cb2c3bfb4e6eb000ef

SHA256
8fe95fda2e703adbf0c4ddd34689932004a6ad3c22eae4e0f3efccab78d94f9b

SHA512
b158d11103bca24131cdcc25ddd66ee734c4901bb7ff29f4b27d607c1c470f4439936c712cdf88304d1cacdf5df13bcf6650be7238fe2d377444b83edabebd76

Download Submit
memory/3148-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3148-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3148-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3972-25-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download