cf30333972a124401bfbdb32ddb19dfc20668b9292c2ff9250b12871a2d1155c

Analysis

max time kernel
162s
max time network
165s
platform
windows10-2004_x64
resource
win10v2004-20240319-en
resource tags

arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
submitted
28/03/2024, 06:51

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General

Target

2024-03-28_bc1e51d94a46c4c2d8213e3cfc71715c_cryptolocker.exe
Size

40KB
MD5

bc1e51d94a46c4c2d8213e3cfc71715c
SHA1

54e2874e8ae2d3ae26895ee114b16b1d454d469c
SHA256

cf30333972a124401bfbdb32ddb19dfc20668b9292c2ff9250b12871a2d1155c
SHA512

8f36ee4dc3189f40f9f99a3db742b53c30e3c5dc2c9a491c6f84b6658022ec1020ad5788db7899a6c95fbb32ad2106f0611b5bdc50158aed7caff11715fa6ee3
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAI:bCDOw9aMDooc+vAI

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1292-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002332e-13.dat	CryptoLocker_rule2
behavioral2/memory/1292-18-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4988-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4988-27-0x0000000008000000-0x000000000800A000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-817259280-2658881748-983986378-1000\Control Panel\International\Geo\Nation	2024-03-28_bc1e51d94a46c4c2d8213e3cfc71715c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4988	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 1292 wrote to memory of 4988	1292	2024-03-28_bc1e51d94a46c4c2d8213e3cfc71715c_cryptolocker.exe	97
PID 1292 wrote to memory of 4988	1292	2024-03-28_bc1e51d94a46c4c2d8213e3cfc71715c_cryptolocker.exe	97
PID 1292 wrote to memory of 4988	1292	2024-03-28_bc1e51d94a46c4c2d8213e3cfc71715c_cryptolocker.exe	97

C:\Users\Admin\AppData\Local\Temp\2024-03-28_bc1e51d94a46c4c2d8213e3cfc71715c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_bc1e51d94a46c4c2d8213e3cfc71715c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1292
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:4988

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=4064 --field-trial-handle=2320,i,3025503729105798828,9325691672526736153,262144 --variations-seed-version /prefetch:8
1⤵
PID:2636

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
40KB

MD5
cc71c3d889bb742e51d62dcccb3680cc

SHA1
36be79fda7d2c0ffded428cf6ddb6db8b12b1547

SHA256
785db2d5c59fb475c88ace227613f8d5c9d02c629a557987235684767fc7c0c7

SHA512
1f293baef3f400a41e55fe3e85d0f2faa56745b08b5fb6388dcf63c2593e67956af9dfa55f6bdd654ee8d1cb0bb87a66f65cfd034af86f07c4a7b3ccc26f3b45

Download Submit
memory/1292-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1292-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1292-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1292-3-0x00000000021A0000-0x00000000021A6000-memory.dmp

Filesize
24KB

Download
memory/1292-18-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4988-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4988-20-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/4988-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4988-27-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download