2a918eb9903d7606aa7adfdf89a6e7be8e11cdc1a3c7caca329241d3784444e9

Analysis

max time kernel
150s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
24/05/2024, 03:45

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General

Target

2024-05-24_8305f8abf36e78427e2567ba0e84f109_cryptolocker.exe
Size

43KB
MD5

8305f8abf36e78427e2567ba0e84f109
SHA1

38af6e5e9b503ad5a0ddc8d23273c5154267a114
SHA256

2a918eb9903d7606aa7adfdf89a6e7be8e11cdc1a3c7caca329241d3784444e9
SHA512

edbe24b9c321fa16a5da23beec75ccd92ae2d2a987fdc8fd7548f823d3d945e2c04486dee399411e26c7e9da75fcec87d4ad4b94c95d46764217be578b447bd8
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA4DwOoJ7:b/pYayGig5HjS3NPAuwfl

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000700000002328e-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-24_8305f8abf36e78427e2567ba0e84f109_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1700	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 4576 wrote to memory of 1700	4576	2024-05-24_8305f8abf36e78427e2567ba0e84f109_cryptolocker.exe	82
PID 4576 wrote to memory of 1700	4576	2024-05-24_8305f8abf36e78427e2567ba0e84f109_cryptolocker.exe	82
PID 4576 wrote to memory of 1700	4576	2024-05-24_8305f8abf36e78427e2567ba0e84f109_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-24_8305f8abf36e78427e2567ba0e84f109_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_8305f8abf36e78427e2567ba0e84f109_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4576
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:1700

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\retln.exe

Filesize
43KB

MD5
7ad55f5fa2999514f4722595a9b348f9

SHA1
3b7ea7fccf0c28bf338f8da0284c830b95be399d

SHA256
b560fbcfd61ceb6e6190b62dfeaf42dfbf5888fe3f29bce58b41a045bc32a1ba

SHA512
ea70b129f0d40f7006d90bd73db95b792186d3f1f8c826f1c73254d092f389547594e5b98d05f173e5bdf4132858cae304c54c1cb70c99c699b4516fae9b3eea

Download Submit
memory/1700-25-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/4576-0-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/4576-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4576-8-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download