4353de5fb67534f96228d78572edab7fca7e9577a05a5971e07d26de84143c23

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06-04-2024 04:01

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General

Target

2024-04-06_9072fae882e1615a7a8c8147811c6e4a_cryptolocker.exe
Size

37KB
MD5

9072fae882e1615a7a8c8147811c6e4a
SHA1

c04b5167fe301a340cd4acd7e299db6a05034848
SHA256

4353de5fb67534f96228d78572edab7fca7e9577a05a5971e07d26de84143c23
SHA512

946282c0dc86f028ebd931c5e5528917d5137ed77b12ff1ad70183cbe3c68ec236e3a1257a0a71914a0ae56170f2277037044b58f0a41c2320179d5a2ee355ee
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZCb9q8IujdxNt:b/yC4GyNM01GuQMNXw2PSj1Pqq8BP

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000700000002321a-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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	2024-04-06_9072fae882e1615a7a8c8147811c6e4a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3260	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 4068 wrote to memory of 3260	4068	2024-04-06_9072fae882e1615a7a8c8147811c6e4a_cryptolocker.exe	87
PID 4068 wrote to memory of 3260	4068	2024-04-06_9072fae882e1615a7a8c8147811c6e4a_cryptolocker.exe	87
PID 4068 wrote to memory of 3260	4068	2024-04-06_9072fae882e1615a7a8c8147811c6e4a_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-04-06_9072fae882e1615a7a8c8147811c6e4a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-06_9072fae882e1615a7a8c8147811c6e4a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4068
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:3260

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
072fd3ab86677b97eecba82d0ca56f94

SHA1
5d0d994ebb7628a555081e676a8ac60d84ee0c51

SHA256
5769216132031d041971ed98ba18362701cd6a4fd23b0ed04b790d97ef7d38d2

SHA512
0211de76622aab53ed004e6f8c11c8a59be9ded990dfda8a0036ca92d658b5df9b1d74a5a514085f64cd51d84b521cf2be975c2d22be7f24aab92dde2afd5145

Download Submit
memory/3260-21-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/4068-0-0x0000000002260000-0x0000000002266000-memory.dmp

Filesize
24KB

Download
memory/4068-1-0x0000000002260000-0x0000000002266000-memory.dmp

Filesize
24KB

Download
memory/4068-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download