4c91ad7466d8f8995b24f4f041282df726d917c8e8d0dd4b7e0c9e3cca5302fa

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
21/02/2024, 15:02

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target

2024-02-21_ee549be3c08d8b6b9ac34b68ca2488bc_cryptolocker.exe
Size

39KB
MD5

ee549be3c08d8b6b9ac34b68ca2488bc
SHA1

5a03bfd5451a6fd2490a8421cac959fff353a9fb
SHA256

4c91ad7466d8f8995b24f4f041282df726d917c8e8d0dd4b7e0c9e3cca5302fa
SHA512

4b7f9eafce048037a5e57c871e73a3e478a1266e6a5f7f4ebe6dc3c99be2bdacc97d93b817ee6cabd8184afab6d66bff24168c34b0edb072701df054ef2944fa
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlxu3G:b/yC4GyNM01GuQMNXw2PSjHPbSuYlf

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023144-12.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-1-5-21-1392040655-2056082574-619088944-1000\Control Panel\International\Geo\Nation	2024-02-21_ee549be3c08d8b6b9ac34b68ca2488bc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2524	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 3556 wrote to memory of 2524	3556	2024-02-21_ee549be3c08d8b6b9ac34b68ca2488bc_cryptolocker.exe	85
PID 3556 wrote to memory of 2524	3556	2024-02-21_ee549be3c08d8b6b9ac34b68ca2488bc_cryptolocker.exe	85
PID 3556 wrote to memory of 2524	3556	2024-02-21_ee549be3c08d8b6b9ac34b68ca2488bc_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-21_ee549be3c08d8b6b9ac34b68ca2488bc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-21_ee549be3c08d8b6b9ac34b68ca2488bc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3556
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:2524

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
39KB

MD5
5d1eeed4e4a82b30982ebe7b1e8fac7a

SHA1
82c17de9f25a5a7902180fe8e5133ef5992f42bd

SHA256
049023990b1c33c86b6372aa3f5cb27a746653f8c49bcc52833549c3588cc6e6

SHA512
20cb3f4f214682556410dd387da8cd53939986daed8d97831e7421f3d5fad35260898122cdbd07af1d27409c5774a1f35b2da1faeede20a032b1a1b35e4d1d5f

Download Submit
memory/2524-25-0x0000000000500000-0x0000000000506000-memory.dmp

Filesize
24KB

Download
memory/3556-0-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/3556-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/3556-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download