9259836c45851a9d33089eb7aa3608e5b7ff854e096fda71fd904098283c6b16

Analysis

max time kernel
152s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19-03-2024 20:42

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe
Size

35KB
MD5

03536215f3a82169420d9e5ba8ebfcc4
SHA1

a8a541a3a9af85aee86555689e32e522b1b33a1f
SHA256

9259836c45851a9d33089eb7aa3608e5b7ff854e096fda71fd904098283c6b16
SHA512

f0faf33753dda3f1770b5a73ab9c88dae05910024bfc2023549bbb94fd6577bc139e83edb459269337eaf6c0b5f2ff53ffcb809ee3decd4190838d74080be43c
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZQYFxh4:b/yC4GyNM01GuQMNXw2PSj1POah4

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000200000001f656-12.dat	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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4740	retln.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 2360 wrote to memory of 4740	2360	2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe	91
PID 2360 wrote to memory of 4740	2360	2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe	91
PID 2360 wrote to memory of 4740	2360	2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2360
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4740

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\retln.exe

Filesize
36KB

MD5
9221af77af562e6fd135366c34fd0b01

SHA1
c4a02b5215fb21e9b204d982e25d019ed836cf6c

SHA256
dc9f17ef1a3ce26bf42eefaa4f0d4f63f9f00eb11bc755b5234183d2f32b77b0

SHA512
d310af99e6e2ea04e0f1b60390fdaa72f61ec3fef7d9ceb3b572480dfb276308fba921d467ddf84bfad2cac11b2e23ccf41090c0bba41a8249d52df8fcf76d40

Download Submit
memory/2360-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2360-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2360-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download