136a8ff76bea3479615fae8a6ceaadc8b4840f31c1fcc01a57c7cb04cc9f328e

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
05/05/2024, 11:02

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General

Target

2024-05-05_1b4eef5e493ec15d0e022ae4ee7da465_cryptolocker.exe
Size

41KB
MD5

1b4eef5e493ec15d0e022ae4ee7da465
SHA1

24c80e48236cb5e041a3be08f09627f3c7fcc5ee
SHA256

136a8ff76bea3479615fae8a6ceaadc8b4840f31c1fcc01a57c7cb04cc9f328e
SHA512

352ece1d510180d19b3b2cde714320d523df52e9baae1417969f3dc5b83387534e4518528dae39df5388bd43f8948bac050de8b4cfb01acbc1503904ddf87217
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlmoHR8uyv:b/yC4GyNM01GuQMNXw2PSjHPbSuYlZQ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023b34-12.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-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-05-05_1b4eef5e493ec15d0e022ae4ee7da465_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2272	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 5824 wrote to memory of 2272	5824	2024-05-05_1b4eef5e493ec15d0e022ae4ee7da465_cryptolocker.exe	83
PID 5824 wrote to memory of 2272	5824	2024-05-05_1b4eef5e493ec15d0e022ae4ee7da465_cryptolocker.exe	83
PID 5824 wrote to memory of 2272	5824	2024-05-05_1b4eef5e493ec15d0e022ae4ee7da465_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-05_1b4eef5e493ec15d0e022ae4ee7da465_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-05_1b4eef5e493ec15d0e022ae4ee7da465_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5824
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:2272

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
41KB

MD5
996ca74540cab942e222c496bc5644e7

SHA1
3cbc992744adc8823884e23f8508adf2bd0c301d

SHA256
491c6c28531e95059b3508f009d04a263a68e12cfaff6a437cfb2d961a5ece0c

SHA512
8e1866405f747ecac2e72ee33c8f40536594bbb292db228ce3c26ead6b3536e910df06c15b1c29a1270feabd97cc6a6573a81052dc0d442ef1f430d63a3254b6

Download Submit
memory/2272-25-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/5824-0-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/5824-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/5824-8-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download