95a408a3a778f1741ce032d1bd72b3d575b9e6fe52d23155ebfdd4db38066980

Analysis

max time kernel
99s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04-02-2024 08:23

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General

Target

2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe
Size

38KB
MD5

2618359e59365da681adce117f44ba98
SHA1

4165fb73a50addbbdf8627752c89d4d996dd0ba2
SHA256

95a408a3a778f1741ce032d1bd72b3d575b9e6fe52d23155ebfdd4db38066980
SHA512

dca117cf7d9d0259b67443c4bdb6c8943645fe304ab9c5cde1879dee9b4ff77e8e9229b42b6cde3e4941be246cbdd62823f0e279e65f1b8210a7c564b8d1e79f
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlxu3y:b/yC4GyNM01GuQMNXw2PSjHPbSuYl7

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023174-12.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-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4184	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 3076 wrote to memory of 4184	3076	2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe	85
PID 3076 wrote to memory of 4184	3076	2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe	85
PID 3076 wrote to memory of 4184	3076	2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3076
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4184

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
38KB

MD5
a965fe397f038b0792b72924d6397921

SHA1
8330be40c92b4f9b452de2e40f6af3cd2ed11c84

SHA256
4f582c6293d82a6b92357f20510df2c8810f57266365b11b1bcfa370b2298b67

SHA512
ee9b5d13809215eeade4236c7f664cb05a4149cfea13d980dfd22da2617ae8b675523a4c53c5dcdf83def4c51a376b00320f5dc7f88be6e6b48788a7853c85b1

Download Submit
memory/3076-0-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/3076-1-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/3076-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4184-21-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download