65858e9ac2c2bc5ebbd8f3bf4da0191372f65a93ec9a1f8d8af03b9b148566f2

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
15/05/2024, 21:26

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General

Target

2024-05-15_2f10172d90cf2fac25eb2bc2a2310a70_cryptolocker.exe
Size

44KB
MD5

2f10172d90cf2fac25eb2bc2a2310a70
SHA1

39178c5b343cbe2c5cf1359412a5165286d94fa1
SHA256

65858e9ac2c2bc5ebbd8f3bf4da0191372f65a93ec9a1f8d8af03b9b148566f2
SHA512

7b05037d1520fb0e9eee81024dd365a55e910c43dc3a864912d0748748767ee7613fa8f9d611dd345f2b25c44b5dd48c2ff8ec22ebdbd6fd6c0e2ba89372d064
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAg4:b/pYayGig5HjS3NPA1

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0006000000022f42-12.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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-15_2f10172d90cf2fac25eb2bc2a2310a70_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4708	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 4012 wrote to memory of 4708	4012	2024-05-15_2f10172d90cf2fac25eb2bc2a2310a70_cryptolocker.exe	82
PID 4012 wrote to memory of 4708	4012	2024-05-15_2f10172d90cf2fac25eb2bc2a2310a70_cryptolocker.exe	82
PID 4012 wrote to memory of 4708	4012	2024-05-15_2f10172d90cf2fac25eb2bc2a2310a70_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-15_2f10172d90cf2fac25eb2bc2a2310a70_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-15_2f10172d90cf2fac25eb2bc2a2310a70_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4012
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4708

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
44KB

MD5
df10c68c22a9a93040d74dfbc62d5b1d

SHA1
1ae722f339f3d095cea37b552ea3e9a4116f0711

SHA256
3468a678d7fcc31968c386fd99f32b0c5ca462c81326cb093c61e8c044a0798f

SHA512
703ccc670d7af226d0ea69e4254f3a5baa840d0f7122d84efce3d8f0f6edd2459c9975412928f0d4a9c01d912526ba2031cf5e27ee4dee621b569c00c5832764

Download Submit
memory/4012-0-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/4012-8-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/4012-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4708-25-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download