3321714d8b508dee89f16efbc2b046805dae9933ee5ac5665f9cff86d72ecbac

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
27/04/2024, 04:39

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General

Target

2024-04-27_4b99c814d28227824368cc3fb9a427a3_cryptolocker.exe
Size

31KB
MD5

4b99c814d28227824368cc3fb9a427a3
SHA1

49860acd0db1d52abc7ddd70bf89656e9b66b41f
SHA256

3321714d8b508dee89f16efbc2b046805dae9933ee5ac5665f9cff86d72ecbac
SHA512

108cb5d804cf0af291e98bf5d24bbe382cdb2155d93a4535c069dfd0ccb1ec9794783fe920f2ad06bb64fd260da201e14471ef97d60ab9dc9bd1128bf95ff744
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zznum+U/hi6:b/yC4GyNM01GuQMNXum+n6

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023b8d-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-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation	2024-04-27_4b99c814d28227824368cc3fb9a427a3_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2824	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 5028 wrote to memory of 2824	5028	2024-04-27_4b99c814d28227824368cc3fb9a427a3_cryptolocker.exe	84
PID 5028 wrote to memory of 2824	5028	2024-04-27_4b99c814d28227824368cc3fb9a427a3_cryptolocker.exe	84
PID 5028 wrote to memory of 2824	5028	2024-04-27_4b99c814d28227824368cc3fb9a427a3_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-27_4b99c814d28227824368cc3fb9a427a3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_4b99c814d28227824368cc3fb9a427a3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5028
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:2824

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
31KB

MD5
f19a22e10dac767852e275b356d122af

SHA1
24623286e4b113567fecdf778c4c0fd79453e1d5

SHA256
b02c25403be99dc73d7ee4e233f48b2127607bf86eafe91cb7962297e3b4d74b

SHA512
4513cb9f7b4120c1ef6f23774d02352cb6276dc401649c2e153afe32c4ce379e95f3415dd9aa920206ce655c7523762104766cfc55422ab8c83a4c1c591f5d54

Download Submit
memory/2824-25-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/5028-0-0x0000000002130000-0x0000000002136000-memory.dmp

Filesize
24KB

Download
memory/5028-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/5028-8-0x0000000002130000-0x0000000002136000-memory.dmp

Filesize
24KB

Download