463d132c289a1977d1f2d417205da3a5abdbea1125e0d8120209c02c889f74d0

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
22-04-2024 13:10

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General

Target

2024-04-22_c4b4f3323b45bfb435f62c2fbe42f601_cryptolocker.exe
Size

41KB
MD5

c4b4f3323b45bfb435f62c2fbe42f601
SHA1

022b503654006b56ea2c19df9d6d877e0bf49d1d
SHA256

463d132c289a1977d1f2d417205da3a5abdbea1125e0d8120209c02c889f74d0
SHA512

b46c4c579468f9a80adca13c072bec6b2cc249c6e214a4b0aac69d9908f5dcb708cb3883eaf60185694e9028f9d4fef162f3bea9347049362caf26a1030370b4
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlmoHR8uyg:b/yC4GyNM01GuQMNXw2PSjHPbSuYlZ3

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000300000001e9b1-12.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-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	2024-04-22_c4b4f3323b45bfb435f62c2fbe42f601_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4800	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 936 wrote to memory of 4800	936	2024-04-22_c4b4f3323b45bfb435f62c2fbe42f601_cryptolocker.exe	86
PID 936 wrote to memory of 4800	936	2024-04-22_c4b4f3323b45bfb435f62c2fbe42f601_cryptolocker.exe	86
PID 936 wrote to memory of 4800	936	2024-04-22_c4b4f3323b45bfb435f62c2fbe42f601_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-22_c4b4f3323b45bfb435f62c2fbe42f601_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-22_c4b4f3323b45bfb435f62c2fbe42f601_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:936
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4800

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
42KB

MD5
ef521204c255f31139d10f62b72692e1

SHA1
2830d463a3670be4e83f4af5684f8626eeb27ab5

SHA256
4b3b47695d8731bcc5c0612935928f8fc260bb168b93769fd392dac35cb9c563

SHA512
2a9a5961480ca5fd065b3148ebbb239385a39a9008c4d4e0a7be0081a73d12ebf52a244a6885fb22bd47eb703c2d8280307ea555ff44d93d15536f36d7586b58

Download Submit
memory/936-0-0x0000000002180000-0x0000000002186000-memory.dmp

Filesize
24KB

Download
memory/936-1-0x0000000002180000-0x0000000002186000-memory.dmp

Filesize
24KB

Download
memory/936-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4800-20-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download