dc84f008b21ae702b988ac233f96892264bf7845fdf3fc5c2fd9dc117d4903a4

Analysis

max time kernel
151s
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
12-02-2024 17:50

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General

Target

2024-02-12_ce5b42eca3a51b7e490b1e8e0621974a_cryptolocker.exe
Size

40KB
MD5

ce5b42eca3a51b7e490b1e8e0621974a
SHA1

8b248c99c68619fecd4693a24886f30a38187c99
SHA256

dc84f008b21ae702b988ac233f96892264bf7845fdf3fc5c2fd9dc117d4903a4
SHA512

e1c3f8bc7b9d6d2321c5dc243948cdb1776cb3e1bb66a9f3d1d981cc7bded87d37697f0ced48662f8d0e3a4a4944db693f5c831ccb9c788809b093ee8c1b53fa
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAO:b/pYayGig5HjS3NPAO

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\retln.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_ce5b42eca3a51b7e490b1e8e0621974a_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-12_ce5b42eca3a51b7e490b1e8e0621974a_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

retln.exe

pid process

2600 retln.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2600	retln.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_ce5b42eca3a51b7e490b1e8e0621974a_cryptolocker.exe

description	pid	process	target process
PID 3412 wrote to memory of 2600	3412	2024-02-12_ce5b42eca3a51b7e490b1e8e0621974a_cryptolocker.exe	retln.exe
PID 3412 wrote to memory of 2600	3412	2024-02-12_ce5b42eca3a51b7e490b1e8e0621974a_cryptolocker.exe	retln.exe
PID 3412 wrote to memory of 2600	3412	2024-02-12_ce5b42eca3a51b7e490b1e8e0621974a_cryptolocker.exe	retln.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_ce5b42eca3a51b7e490b1e8e0621974a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_ce5b42eca3a51b7e490b1e8e0621974a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3412

C:\Users\Admin\AppData\Local\Temp\retln.exe
"C:\Users\Admin\AppData\Local\Temp\retln.exe"
2⤵
- Executes dropped EXE
PID:2600

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
40KB

MD5
c1500c1a01e8f0566bc372ffd509b9e3

SHA1
0827468dfa4e7b7330680af33494440d9f2ea027

SHA256
2e5bf3625fa9ab0f56e807c269a2b077688fca3ce8d1a69c4ac84e2001ac2d32

SHA512
bf48da3f9a93d003c7d5b1300de953cc903486d235c2759419beba91ec579f564ba43c844265cbe653444ed9d3f431c4793588d3e8a92120a4448a657e213df7

Download Submit
memory/2600-20-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/3412-0-0x0000000002340000-0x0000000002346000-memory.dmp

Filesize
24KB

Download
memory/3412-1-0x0000000002340000-0x0000000002346000-memory.dmp

Filesize
24KB

Download
memory/3412-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download