88bf050abce7f8f23b57382e3c512a104e7fc22771c1da9c219e179f8105367d

Analysis

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

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
25-04-2024 04:27

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General

Target

2024-04-25_1d724ddce55f1ce2147815da8ab7ee78_cryptolocker.exe
Size

32KB
MD5

1d724ddce55f1ce2147815da8ab7ee78
SHA1

8bc9aa7eeffcf3aef8cbef501d9b1d77619cbd82
SHA256

88bf050abce7f8f23b57382e3c512a104e7fc22771c1da9c219e179f8105367d
SHA512

90cdc54d13b35cc8a69fa36f1ea5b0c739d385ed014662a817ace72f24257c155d4b6ca1ae09f24584e707ec277b24d672dcb2ac3974a2be6c95d610a7bdf099
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznStEkcsgRO:b/yC4GyNM01GuQMNXw2PSjSKkcJRO

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:

2024-04-25_1d724ddce55f1ce2147815da8ab7ee78_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	2024-04-25_1d724ddce55f1ce2147815da8ab7ee78_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

retln.exe

pid process

3204 retln.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3204	retln.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-25_1d724ddce55f1ce2147815da8ab7ee78_cryptolocker.exe

description	pid	process	target process
PID 3020 wrote to memory of 3204	3020	2024-04-25_1d724ddce55f1ce2147815da8ab7ee78_cryptolocker.exe	retln.exe
PID 3020 wrote to memory of 3204	3020	2024-04-25_1d724ddce55f1ce2147815da8ab7ee78_cryptolocker.exe	retln.exe
PID 3020 wrote to memory of 3204	3020	2024-04-25_1d724ddce55f1ce2147815da8ab7ee78_cryptolocker.exe	retln.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-25_1d724ddce55f1ce2147815da8ab7ee78_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-25_1d724ddce55f1ce2147815da8ab7ee78_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3020

C:\Users\Admin\AppData\Local\Temp\retln.exe
"C:\Users\Admin\AppData\Local\Temp\retln.exe"
2⤵
- Executes dropped EXE
PID:3204

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\retln.exe
Filesize
33KB

MD5
f6f531fd44d9fa308a04dd2f15e6d1b0

SHA1
fa59e3175ecd74f47e7cc5e490e49ce181a23922

SHA256
e9d5d50d9d8a90ffb7a848d39b78cb4bd9a582e7e8e168463e855953ccd9d811

SHA512
d669c43ec5d95fe795fc4ac3f2064eea265b5328a53af836af0213f3ea20c5d5d45babd793d3998d4ad4b63fe4fbbbe9beed79b28b86ae264ff0ecc45bb82807

Download Submit
memory/3020-0-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3020-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3020-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3204-21-0x00000000020A0000-0x00000000020A6000-memory.dmp

Filesize
24KB

Download