56ba6e33d786a2b5044ecd53999cce04e9580570401fa9ab9f4c55ba2836b4fa

Analysis

max time kernel
151s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
10/05/2024, 04:50

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General

Target

2024-05-10_b88e9eca4cdf60e85b033511c54fb2f1_cryptolocker.exe
Size

41KB
MD5

b88e9eca4cdf60e85b033511c54fb2f1
SHA1

a5a6de1ac54e9fca509af4136c1cd7606e030771
SHA256

56ba6e33d786a2b5044ecd53999cce04e9580570401fa9ab9f4c55ba2836b4fa
SHA512

474f143bb5f2d7a219ebcc533cad7002b6cd55619fcda4ae3dcccd4635770d615552b18347f957ba8917a7770e23aa7053eb5eb3d1a6b485973d6f77f1207857
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAo:bCDOw9aMDooc+vAo

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3152-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002324b-13.dat	CryptoLocker_rule2
behavioral2/memory/3152-25-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4648-26-0x0000000008000000-0x000000000800A000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-10_b88e9eca4cdf60e85b033511c54fb2f1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4648	lossy.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 3152 wrote to memory of 4648	3152	2024-05-10_b88e9eca4cdf60e85b033511c54fb2f1_cryptolocker.exe	92
PID 3152 wrote to memory of 4648	3152	2024-05-10_b88e9eca4cdf60e85b033511c54fb2f1_cryptolocker.exe	92
PID 3152 wrote to memory of 4648	3152	2024-05-10_b88e9eca4cdf60e85b033511c54fb2f1_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-05-10_b88e9eca4cdf60e85b033511c54fb2f1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_b88e9eca4cdf60e85b033511c54fb2f1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3152
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:4648

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 --mojo-platform-channel-handle=4144 --field-trial-handle=2276,i,11674642242468042059,14711253743544118298,262144 --variations-seed-version /prefetch:8
1⤵
PID:2800

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
41KB

MD5
a9882efbe2ef6b8d398007e9f6de5558

SHA1
f5b17b2a01f4bc6eeff60a265145de8f6c20133f

SHA256
78a75b0a5362d48f5f97f75af540a08c4eaab8544f4f0430577646bd159ad36f

SHA512
bdd55fe84ad4bcf414e1561778f62b5d78393dc1690e2225007ef675b430fc5c2cc08e82ed2dabd9536d766a5263e45c1aefd15cecb590b173ab53b889c24139

Download Submit
memory/3152-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3152-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3152-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3152-3-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/3152-25-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4648-24-0x0000000000550000-0x0000000000556000-memory.dmp

Filesize
24KB

Download
memory/4648-18-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4648-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download