795ff648bd79eb6e4dedfbd2d284b87da95da664479196449ea4836896db6c56

Analysis

max time kernel
150s
max time network
147s
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 15:45

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General

Target

2024-05-21_b712f54d1843f7f4991b919594c74fd8_cryptolocker.exe
Size

43KB
MD5

b712f54d1843f7f4991b919594c74fd8
SHA1

b1cab6f6a500c6f1a1ac15ec7b49f34f9b5b15a5
SHA256

795ff648bd79eb6e4dedfbd2d284b87da95da664479196449ea4836896db6c56
SHA512

7b8b09f5252c06511c3b5f1c2916210950a383784e3bfaa45707c61791ecb29e13b3d3cbdc9f5b6e889012fe8b7156e1c1700f420f6a50370d6273f249ac603d
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAydC:bCDOw9aMDooc+vAyU

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2876-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\lossy.exe	CryptoLocker_rule2
behavioral2/memory/2876-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3692-26-0x0000000008000000-0x000000000800A000-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_b712f54d1843f7f4991b919594c74fd8_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_b712f54d1843f7f4991b919594c74fd8_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

lossy.exe

pid process

3692 lossy.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3692	lossy.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-21_b712f54d1843f7f4991b919594c74fd8_cryptolocker.exe

description	pid	process	target process
PID 2876 wrote to memory of 3692	2876	2024-05-21_b712f54d1843f7f4991b919594c74fd8_cryptolocker.exe	lossy.exe
PID 2876 wrote to memory of 3692	2876	2024-05-21_b712f54d1843f7f4991b919594c74fd8_cryptolocker.exe	lossy.exe
PID 2876 wrote to memory of 3692	2876	2024-05-21_b712f54d1843f7f4991b919594c74fd8_cryptolocker.exe	lossy.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_b712f54d1843f7f4991b919594c74fd8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_b712f54d1843f7f4991b919594c74fd8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2876

C:\Users\Admin\AppData\Local\Temp\lossy.exe
"C:\Users\Admin\AppData\Local\Temp\lossy.exe"
2⤵
- Executes dropped EXE
PID:3692

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\lossy.exe

Filesize
43KB

MD5
5a21eddbae3357e41ba23685953c627d

SHA1
d5ad7024611ba090476fed9cd3dd59e14101f9b3

SHA256
43e1a6bf284baa233fdb0ec577d252d92ae0dd6f0f27c4dce7cd09de6f432559

SHA512
0649197e58fa8e5b765bd8f925050ada27ef237632a9af36d5c9dc8d3b4017e019fbec0627526a785f83e915dbc1b59f86d3c0007071bbe547f44ffa3e5a81ed

Download Submit
memory/2876-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2876-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2876-2-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/2876-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2876-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3692-19-0x0000000001F60000-0x0000000001F66000-memory.dmp

Filesize
24KB

Download
memory/3692-25-0x0000000001F40000-0x0000000001F46000-memory.dmp

Filesize
24KB

Download
memory/3692-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download