8ca79af7a5e61a7a72cd473ce3d77476214bf100b340b58cb0145a4191217e1e

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
17/05/2024, 01:25

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General

Target

2024-05-17_7f028eaf61b90fa0fd23c0f5a7459f30_cryptolocker.exe
Size

37KB
MD5

7f028eaf61b90fa0fd23c0f5a7459f30
SHA1

b63a13a8ff9f967d6adbbc278a73a7ca6394b34e
SHA256

8ca79af7a5e61a7a72cd473ce3d77476214bf100b340b58cb0145a4191217e1e
SHA512

aae32340c630f764a7df2e76f14eecce9f48d09850e68d978da7b0d816a7842abc589d6959dd655adcd4655cb96e3e5523c8c7aa2a8f66c9bfe0d36bceb8b7cd
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0X/EIjxua6sY:b/yC4GyNM01GuQMNXw2PSjH+PPxAsY

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00080000000233e9-12.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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-17_7f028eaf61b90fa0fd23c0f5a7459f30_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4572	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 4276 wrote to memory of 4572	4276	2024-05-17_7f028eaf61b90fa0fd23c0f5a7459f30_cryptolocker.exe	82
PID 4276 wrote to memory of 4572	4276	2024-05-17_7f028eaf61b90fa0fd23c0f5a7459f30_cryptolocker.exe	82
PID 4276 wrote to memory of 4572	4276	2024-05-17_7f028eaf61b90fa0fd23c0f5a7459f30_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-17_7f028eaf61b90fa0fd23c0f5a7459f30_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-17_7f028eaf61b90fa0fd23c0f5a7459f30_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4276
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4572

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
37KB

MD5
78dbdbf9f3f4fb9dbddf367475c56bff

SHA1
70475eb35ffc13341dc43d4aac2de734d84c87c5

SHA256
65d3624b9fb02eb5f934f9e9e12baed8a5b722f7f5da09b00079bbb6435260a8

SHA512
a58c15d2b8d9f89b25c0eddebc7acb5f622830ed684c5431ff62cb019c7a52e68b1602de780bfff035d2f6349e8b901a1e9a436854e8b82b787237edfdb2ab44

Download Submit
memory/4276-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4276-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4276-8-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4572-25-0x0000000002000000-0x0000000002006000-memory.dmp

Filesize
24KB

Download