7e9763a66e4cbf95f130ba939afdcfe0f8405439b0e4abfe0de8072046a1fd5e

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
21/04/2024, 21:34

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General

Target

2024-04-21_63cbc0544b23818a07be40e04ce9114e_cryptolocker.exe
Size

42KB
MD5

63cbc0544b23818a07be40e04ce9114e
SHA1

535100d763aaf678c765034b7c45a7a74262e9aa
SHA256

7e9763a66e4cbf95f130ba939afdcfe0f8405439b0e4abfe0de8072046a1fd5e
SHA512

ae6c82c5c3ee43d88e03ee18a75d631f684431f165969ccab76bd1ebfe758d3d002d8f5f4fbea297a112119f852373a2ff1d0c66c250ba5a613616891f38d3ce
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAekL:b/pYayGig5HjS3NPAekL

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x001c00000001e97e-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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	2024-04-21_63cbc0544b23818a07be40e04ce9114e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2644	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 2228 wrote to memory of 2644	2228	2024-04-21_63cbc0544b23818a07be40e04ce9114e_cryptolocker.exe	84
PID 2228 wrote to memory of 2644	2228	2024-04-21_63cbc0544b23818a07be40e04ce9114e_cryptolocker.exe	84
PID 2228 wrote to memory of 2644	2228	2024-04-21_63cbc0544b23818a07be40e04ce9114e_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-21_63cbc0544b23818a07be40e04ce9114e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-21_63cbc0544b23818a07be40e04ce9114e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2228
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:2644

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
42KB

MD5
7c44f9b329e805b6fad27385e3bccc0d

SHA1
dbbd71e379fc501f5de476a1761769e9215d7afc

SHA256
e46ea59b723a86b23adc74665a9bcc751ae4da358b2690c5c577e9f6c10c72d6

SHA512
ce54bf579a887a1ee3facdb93843adb28624aca82c9ae281bb6debc23195e6f5f39e408424a1fec7879a67ea1cdb58709d5ae1af820a47ebbcbc34600c3309d5

Download Submit
memory/2228-0-0x0000000000720000-0x0000000000726000-memory.dmp

Filesize
24KB

Download
memory/2228-1-0x0000000000720000-0x0000000000726000-memory.dmp

Filesize
24KB

Download
memory/2228-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2644-20-0x0000000002010000-0x0000000002016000-memory.dmp

Filesize
24KB

Download