c799565aa9bc7ab1afb40315584332edbd9de7796ebce9313cee2aa8d2605e25

Analysis

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

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 14:31

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General

Target

2024-05-21_a289ed982e49cc4822d40ef6e21ca6e3_cryptolocker.exe
Size

43KB
MD5

a289ed982e49cc4822d40ef6e21ca6e3
SHA1

8fdbcf2348dbecc5328d74f24a987c1e173c73ec
SHA256

c799565aa9bc7ab1afb40315584332edbd9de7796ebce9313cee2aa8d2605e25
SHA512

b6e55ea2300949b2a712a4b439e97fcf0eef144312c42cc0c31dc831c275771f0ed8224c7dd7dc122e73050fec15863c2e0005ba0d66566b25ebed85d1424bce
SSDEEP

384:bm74uGLLQRcsdeQ72ngEr4K7YmE8jb0nrlwfjDUNb:bm74zYcgT/EkM0ryfjg

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3644-0-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral2/memory/3644-17-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4256-25-0x0000000008000000-0x000000000800D000-memory.dmp	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

Processes:

2024-05-21_a289ed982e49cc4822d40ef6e21ca6e3_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-21_a289ed982e49cc4822d40ef6e21ca6e3_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

4256 hasfj.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4256	hasfj.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-21_a289ed982e49cc4822d40ef6e21ca6e3_cryptolocker.exe

description	pid	process	target process
PID 3644 wrote to memory of 4256	3644	2024-05-21_a289ed982e49cc4822d40ef6e21ca6e3_cryptolocker.exe	hasfj.exe
PID 3644 wrote to memory of 4256	3644	2024-05-21_a289ed982e49cc4822d40ef6e21ca6e3_cryptolocker.exe	hasfj.exe
PID 3644 wrote to memory of 4256	3644	2024-05-21_a289ed982e49cc4822d40ef6e21ca6e3_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_a289ed982e49cc4822d40ef6e21ca6e3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_a289ed982e49cc4822d40ef6e21ca6e3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3644
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:4256

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\hasfj.exe

Filesize
43KB

MD5
c433cf4f47ce8fac3c07b85a24476538

SHA1
73aafcd6056431ef462a131e86a56e656aadff21

SHA256
a8a67ca5558ca5ff12a0a8beaa9dd5cdf696b39d97b40b2d7ed7427002c6709d

SHA512
cb73d489c3ff3075ff8a42d44665998bb1400dc23531e2f9fd99a66aab8ac70f283e6358505e92f6adff82e23f7c01e5a5a0059e7aa985a853302cba730a5657

Download Submit
memory/3644-0-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/3644-1-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/3644-2-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/3644-9-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/3644-17-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/4256-25-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download