d2496763756cb52ce93c9b7aff35092912d8534da0b911ac33fcc8f50f7213e6

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
22-05-2024 02:37

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General

Target

2024-05-22_637d5e856531ac100a5502ec7ef542c5_cryptolocker.exe
Size

41KB
MD5

637d5e856531ac100a5502ec7ef542c5
SHA1

5da3b971f11514b05ac22d27bc468f1af4c37c0c
SHA256

d2496763756cb52ce93c9b7aff35092912d8534da0b911ac33fcc8f50f7213e6
SHA512

b272039db6f91c3227ce8368fe09202f4dc21360894af40dea0c1cb184c6f3088c347305f86b1dd496ba989a8a13e810518f1cf57ed1091707ec6915cc9f9173
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAdM:bCDOw9aMDooc+vAq

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/116-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\lossy.exe	CryptoLocker_rule2
behavioral2/memory/116-18-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4996-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4996-27-0x0000000008000000-0x000000000800A000-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:

2024-05-22_637d5e856531ac100a5502ec7ef542c5_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-22_637d5e856531ac100a5502ec7ef542c5_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

lossy.exe

pid process

4996 lossy.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4996	lossy.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_637d5e856531ac100a5502ec7ef542c5_cryptolocker.exe

description	pid	process	target process
PID 116 wrote to memory of 4996	116	2024-05-22_637d5e856531ac100a5502ec7ef542c5_cryptolocker.exe	lossy.exe
PID 116 wrote to memory of 4996	116	2024-05-22_637d5e856531ac100a5502ec7ef542c5_cryptolocker.exe	lossy.exe
PID 116 wrote to memory of 4996	116	2024-05-22_637d5e856531ac100a5502ec7ef542c5_cryptolocker.exe	lossy.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_637d5e856531ac100a5502ec7ef542c5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_637d5e856531ac100a5502ec7ef542c5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:116

C:\Users\Admin\AppData\Local\Temp\lossy.exe
"C:\Users\Admin\AppData\Local\Temp\lossy.exe"
2⤵
- Executes dropped EXE
PID:4996

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=3628,i,13281073920029625837,8253721632651544158,262144 --variations-seed-version --mojo-platform-channel-handle=3888 /prefetch:8
1⤵
PID:3488

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\lossy.exe
Filesize
41KB

MD5
b0337c5f6f0eba81cb76e66ea99a4d75

SHA1
108aabc5a895608b050b50302c23407a7338a072

SHA256
a89be529e8c9f3d4a38adebaf3fa65a1ca2935fecd28374032687318df749832

SHA512
89daf8c38e10c9585c660c0ef60c2c497dd7c23de1fcc9651f1274f66b61b6ea7817aa6b1dc321dfc7c6e0a375fd09003809cfe3f47cb2c0763aa78529b12fad

Download Submit
memory/116-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/116-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/116-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/116-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/116-18-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4996-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4996-20-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/4996-26-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4996-27-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download