6dca2b7a8043247095ac7d05b4d8ba65defba73ff9939f0f1a54685dbcdca96d

Analysis

max time kernel
150s
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 19:57

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General

Target

2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe
Size

40KB
MD5

4b68ecab026c808b7b5336afa90fd5dd
SHA1

d792149cb5acdb82ffaa9b98037f59034dcf8a8e
SHA256

6dca2b7a8043247095ac7d05b4d8ba65defba73ff9939f0f1a54685dbcdca96d
SHA512

4723b1212ea17f4110b5200b41f15862113561b94a2d01f5121badbfbd07e2f02bb65e6a3964998461cdd690247924e6bd811dd269e20ff5c431d514ad608fda
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAA:b/pYayGig5HjS3NPAA

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_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

retln.exe

pid process

2148 retln.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2148	retln.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe

description	pid	process	target process
PID 3228 wrote to memory of 2148	3228	2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe	retln.exe
PID 3228 wrote to memory of 2148	3228	2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe	retln.exe
PID 3228 wrote to memory of 2148	3228	2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe	retln.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_4b68ecab026c808b7b5336afa90fd5dd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3228

C:\Users\Admin\AppData\Local\Temp\retln.exe
"C:\Users\Admin\AppData\Local\Temp\retln.exe"
2⤵
- Executes dropped EXE
PID:2148

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
41KB

MD5
5b9869c1e89ac2966443163456f48e12

SHA1
42aa8649fcfa09a74722c8f725e404bae837cfe0

SHA256
160bad443607b4035a6394ae141e49b0f241dd21e32da913bca2400ee3f83aa7

SHA512
bbc158182cfd7892d8abd018498b050393b29987f4d147710877f0ca8796567d4004bf6c16f8a6e6360766b1675d61267013d2cc2896dff2796644a4c8ec9ee7

Download Submit
memory/2148-19-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/3228-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3228-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3228-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download