e31c4ad4afc16b05e040c291d402b2121f9fb66fa8cf5bf983b8d6633f72104e

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
11/03/2024, 04:28

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General

Target

2024-03-11_49e2381907de5a8a86c5b6b8a157527a_cryptolocker.exe
Size

38KB
MD5

49e2381907de5a8a86c5b6b8a157527a
SHA1

1c08198d48380f71d91baa8cc7d68ffaaca078f2
SHA256

e31c4ad4afc16b05e040c291d402b2121f9fb66fa8cf5bf983b8d6633f72104e
SHA512

9e969f8f340f42a8c4b56158a94437408125261a4faa1128bfa4e351d42acb4ffd5d24a84a479bba299ced87da14b694f348c2417678e36a183a396b2764898f
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlWnM:b/yC4GyNM01GuQMNXw2PSjHPbSuYlWM

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00070000000231fe-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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	2024-03-11_49e2381907de5a8a86c5b6b8a157527a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5116	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 2640 wrote to memory of 5116	2640	2024-03-11_49e2381907de5a8a86c5b6b8a157527a_cryptolocker.exe	88
PID 2640 wrote to memory of 5116	2640	2024-03-11_49e2381907de5a8a86c5b6b8a157527a_cryptolocker.exe	88
PID 2640 wrote to memory of 5116	2640	2024-03-11_49e2381907de5a8a86c5b6b8a157527a_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-11_49e2381907de5a8a86c5b6b8a157527a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-11_49e2381907de5a8a86c5b6b8a157527a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2640
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:5116

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
3124996ee87584a6a00c1a21957122a6

SHA1
c0c0689f5b6785497fc36afdee33569befb73431

SHA256
e4c5e2df98c5fddf7935f0fc45413f98ac35e86522aa8fc8919571602a195cab

SHA512
41b8998712f91f00bb59c0a3658a1fb9115f9988ba0ba4ffa9162a3892142c4480bf15e2679ee175cbe0948eeaf45ffa3770544c284dbaaab71f3827648ee88f

Download Submit
memory/2640-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2640-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2640-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/5116-21-0x0000000001FA0000-0x0000000001FA6000-memory.dmp

Filesize
24KB

Download